// #################################################################################################
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// #################################################################################################
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// # << NEORV32 - SPI Bus Explorer Demo Program >> #
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// # << NEORV32 - SPI Bus Explorer Demo Program >> #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # BSD 3-Clause License #
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// # #
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// # #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # permitted provided that the following conditions are met: #
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// # #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # conditions and the following disclaimer. #
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// # conditions and the following disclaimer. #
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// # #
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// # #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
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// # conditions and the following disclaimer in the documentation and/or other materials #
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// # conditions and the following disclaimer in the documentation and/or other materials #
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// # provided with the distribution. #
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// # provided with the distribution. #
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// # #
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// # #
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// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
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// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
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// # endorse or promote products derived from this software without specific prior written #
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// # endorse or promote products derived from this software without specific prior written #
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// # permission. #
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// # permission. #
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// # #
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// # #
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// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
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// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
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// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
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// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
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// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
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// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
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// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
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// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
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// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
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// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
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// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
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// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
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// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
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// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
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// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
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// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
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// # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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// #################################################################################################
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// #################################################################################################
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/**********************************************************************//**
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/**********************************************************************//**
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* @file demo_spi/main.c
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* @file demo_spi/main.c
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* @author Stephan Nolting
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* @author Stephan Nolting
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* @brief SPI bus explorer (execute SPI transactions by hand).
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* @brief SPI bus explorer (execute SPI transactions by hand).
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**************************************************************************/
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**************************************************************************/
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#include <neorv32.h>
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#include <neorv32.h>
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#include <string.h>
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#include <string.h>
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/**********************************************************************//**
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/**********************************************************************//**
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* @name User configuration
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* @name User configuration
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**************************************************************************/
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**************************************************************************/
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/**@{*/
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/**@{*/
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/** UART BAUD rate */
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/** UART BAUD rate */
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#define BAUD_RATE 19200
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#define BAUD_RATE 19200
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/**@}*/
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/**@}*/
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// Global variables
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// Global variables
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uint32_t spi_configured;
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uint32_t spi_configured;
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uint32_t spi_size; // data quantity in bytes
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uint32_t spi_size; // data quantity in bytes
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// Prototypes
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// Prototypes
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void spi_cs(uint32_t type);
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void spi_cs(uint32_t type);
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void spi_trans(void);
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void spi_trans(void);
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void spi_setup(void);
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void spi_setup(void);
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void flash_write(void);
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void flash_read(void);
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uint32_t hexstr_to_uint(char *buffer, uint8_t length);
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uint32_t hexstr_to_uint(char *buffer, uint8_t length);
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void aux_print_hex_byte(uint8_t byte);
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void aux_print_hex_byte(uint8_t byte);
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/**********************************************************************//**
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/**********************************************************************//**
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* SPI flash commands
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**************************************************************************/
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enum SPI_FLASH_CMD {
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SPI_FLASH_CMD_WRITE = 0x02, /**< Write data */
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SPI_FLASH_CMD_READ = 0x03, /**< Read data */
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SPI_FLASH_CMD_READ_SR = 0x05, /**< Get status register */
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SPI_FLASH_CMD_WREN = 0x06 /**< Enable write access */
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};
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/**********************************************************************//**
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* This program provides an interactive console to communicate with SPI devices.
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* This program provides an interactive console to communicate with SPI devices.
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*
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*
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* @note This program requires the UART and the SPI to be synthesized.
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* @note This program requires the UART and the SPI to be synthesized.
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*
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*
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* @return Irrelevant.
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* @return Irrelevant.
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**************************************************************************/
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**************************************************************************/
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int main() {
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int main() {
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char buffer[8];
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char buffer[16];
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int length = 0;
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int length = 0;
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// capture all exceptions and give debug info via UART
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// capture all exceptions and give debug info via UART
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// this is not required, but keeps us safe
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// this is not required, but keeps us safe
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neorv32_rte_setup();
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neorv32_rte_setup();
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// init UART0 at default baud rate, no parity bits, ho hw flow control
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// init UART0 at default baud rate, no parity bits, ho hw flow control
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neorv32_uart0_setup(BAUD_RATE, PARITY_NONE, FLOW_CONTROL_NONE);
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neorv32_uart0_setup(BAUD_RATE, PARITY_NONE, FLOW_CONTROL_NONE);
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// check if UART0 unit is implemented at all
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// check if UART0 unit is implemented at all
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if (neorv32_uart0_available() == 0) {
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if (neorv32_uart0_available() == 0) {
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return 1;
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return 1;
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}
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}
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// intro
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// intro
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neorv32_uart0_printf("\n<<< SPI Bus Explorer >>>\n\n");
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neorv32_uart0_printf("\n<<< SPI Bus Explorer >>>\n\n");
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// check if SPI unit is implemented at all
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// check if SPI unit is implemented at all
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if (neorv32_spi_available() == 0) {
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if (neorv32_spi_available() == 0) {
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neorv32_uart0_printf("No SPI unit implemented.");
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neorv32_uart0_printf("No SPI unit implemented.");
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return 1;
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return 1;
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}
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}
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// info
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// info
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neorv32_uart0_printf("This program allows to create SPI transfers by hand.\n"
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neorv32_uart0_printf("This program allows to create SPI transfers by hand.\n"
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"Type 'help' to see the help menu.\n\n");
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"Type 'help' to see the help menu.\n\n");
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// disable and reset SPI module
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// disable and reset SPI module
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NEORV32_SPI.CTRL = 0;
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NEORV32_SPI.CTRL = 0;
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spi_configured = 0; // SPI not configured yet
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spi_configured = 0; // SPI not configured yet
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spi_size = 0;
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spi_size = 0;
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// Main menu
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// Main menu
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for (;;) {
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for (;;) {
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neorv32_uart0_printf("SPI_EXPLORER:> ");
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neorv32_uart0_printf("SPI_EXPLORER:> ");
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length = neorv32_uart0_scan(buffer, 8, 1);
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length = neorv32_uart0_scan(buffer, 15, 1);
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neorv32_uart0_printf("\n");
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neorv32_uart0_printf("\n");
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if (!length) // nothing to be done
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if (!length) // nothing to be done
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continue;
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continue;
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// decode input and execute command
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// decode input and execute command
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if (!strcmp(buffer, "help")) {
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if (!strcmp(buffer, "help")) {
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neorv32_uart0_printf("Available commands:\n"
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neorv32_uart0_printf("Available commands:\n"
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" help - show this text\n"
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" help - show this text\n"
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" setup - configure SPI module\n"
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" setup - configure SPI module (clock speed and mode, data size)\n"
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" cs-en - enable CS line (set low)\n"
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" cs-en - enable CS line (set low)\n"
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" cs-dis - disable CS line (set high)\n"
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" cs-dis - disable CS line (set high)\n"
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" trans - execute a transmission (write & read to/from SPI)\n"
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" trans - execute a transmission (write & read to/from SPI)\n"
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"\n"
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"\n"
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" flash-wr - write binary file to SPI flash\n"
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" flash-rd - dump SPI flash\n"
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"\n"
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"Configure the SPI module using 'setup'. Enable a certain module using 'cs-en',\n"
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"Configure the SPI module using 'setup'. Enable a certain module using 'cs-en',\n"
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"then transfer data using 'trans' and disable the module again using 'cs-dis'.\n\n");
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"then transfer data using 'trans' and disable the module again using 'cs-dis'.\n"
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"\n"
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"Standard SPI flash and EEPROM memories can be programmed/read\n"
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"via 'flash-wr' and 'flash-rd'.\n\n");
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}
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}
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else if (!strcmp(buffer, "setup")) {
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else if (!strcmp(buffer, "setup")) {
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spi_setup();
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spi_setup();
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}
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}
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else if (!strcmp(buffer, "cs-en")) {
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else if (!strcmp(buffer, "cs-en")) {
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spi_cs(1);
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spi_cs(1);
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}
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}
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else if (!strcmp(buffer, "cs-dis")) {
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else if (!strcmp(buffer, "cs-dis")) {
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spi_cs(0);
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spi_cs(0);
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}
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}
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else if (!strcmp(buffer, "trans")) {
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else if (!strcmp(buffer, "trans")) {
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spi_trans();
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spi_trans();
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}
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}
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else if (!strcmp(buffer, "flash-wr")) {
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flash_write();
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}
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else if (!strcmp(buffer, "flash-rd")) {
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flash_read();
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}
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else {
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else {
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neorv32_uart0_printf("Invalid command. Type 'help' to see all commands.\n");
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neorv32_uart0_printf("Invalid command. Type 'help' to see all commands.\n");
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}
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}
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}
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}
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return 0;
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return 0;
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Enable or disable chip-select line
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* Enable or disable chip-select line
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*
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*
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* @param[in] type 0=disable, 1=enable
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* @param[in] type 0=disable, 1=enable
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**************************************************************************/
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**************************************************************************/
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void spi_cs(uint32_t type) {
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void spi_cs(uint32_t type) {
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char terminal_buffer[2];
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char terminal_buffer[2];
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uint8_t channel;
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uint8_t channel;
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if (type) {
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if (type) {
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neorv32_uart0_printf("Select chip-select line to enable (set low) [0..7]: ");
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neorv32_uart0_printf("Select chip-select line to enable (set low) [0..7]: ");
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}
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}
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else {
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else {
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neorv32_uart0_printf("Select chip-select line to disable (set high) [0..7]: ");
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neorv32_uart0_printf("Select chip-select line to disable (set high) [0..7]: ");
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}
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}
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while (1) {
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while (1) {
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neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
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neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
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channel = (uint8_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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channel = (uint8_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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if (channel > 7) {
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if (channel > 7) {
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neorv32_uart0_printf("\nInvalid channel selection!\n");
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neorv32_uart0_printf("\nInvalid channel selection!\n");
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return;
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return;
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}
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}
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else {
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else {
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neorv32_uart0_printf("\n");
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neorv32_uart0_printf("\n");
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break;
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break;
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}
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}
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}
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}
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if (type) {
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if (type) {
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neorv32_spi_cs_en(channel);
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neorv32_spi_cs_en(channel);
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}
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}
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else {
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else {
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neorv32_spi_cs_dis(channel);
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neorv32_spi_cs_dis(channel);
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}
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}
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* SPI data transfer
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* SPI data transfer
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**************************************************************************/
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**************************************************************************/
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void spi_trans(void) {
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void spi_trans(void) {
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char terminal_buffer[9];
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char terminal_buffer[9];
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if (spi_configured == 0) {
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if (spi_configured == 0) {
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neorv32_uart0_printf("SPI module not configured yet! Use 'setup' to configure SPI module.\n");
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neorv32_uart0_printf("SPI module not configured yet! Use 'setup' to configure SPI module.\n");
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return;
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return;
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}
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}
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neorv32_uart0_printf("Enter TX data (%u hex chars): 0x", spi_size);
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neorv32_uart0_printf("Enter TX data (%u hex chars): 0x", spi_size*2);
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neorv32_uart0_scan(terminal_buffer, spi_size*2+1, 1);
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neorv32_uart0_scan(terminal_buffer, spi_size*2+1, 1);
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uint32_t tx_data = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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uint32_t tx_data = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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uint32_t rx_data = neorv32_spi_trans(tx_data);
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uint32_t rx_data = neorv32_spi_trans(tx_data);
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if (spi_size == 1) {
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if (spi_size == 1) {
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neorv32_uart0_printf("\nTX data: 0x");
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neorv32_uart0_printf("\nTX data: 0x");
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aux_print_hex_byte((uint8_t)(tx_data));
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aux_print_hex_byte((uint8_t)(tx_data));
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neorv32_uart0_printf("\nRX data: 0x");
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neorv32_uart0_printf("\nRX data: 0x");
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aux_print_hex_byte((uint8_t)(rx_data));
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aux_print_hex_byte((uint8_t)(rx_data));
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neorv32_uart0_printf("\n");
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neorv32_uart0_printf("\n");
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}
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}
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else if (spi_size == 2) {
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else if (spi_size == 2) {
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neorv32_uart0_printf("\nTX data: 0x");
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neorv32_uart0_printf("\nTX data: 0x");
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aux_print_hex_byte((uint8_t)(tx_data >> 8));
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aux_print_hex_byte((uint8_t)(tx_data >> 8));
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aux_print_hex_byte((uint8_t)(tx_data));
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aux_print_hex_byte((uint8_t)(tx_data));
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neorv32_uart0_printf("\nRX data: 0x");
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neorv32_uart0_printf("\nRX data: 0x");
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aux_print_hex_byte((uint8_t)(rx_data >> 8));
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aux_print_hex_byte((uint8_t)(rx_data >> 8));
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aux_print_hex_byte((uint8_t)(rx_data));
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aux_print_hex_byte((uint8_t)(rx_data));
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neorv32_uart0_printf("\n");
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neorv32_uart0_printf("\n");
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}
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}
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else if (spi_size == 3) {
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else if (spi_size == 3) {
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neorv32_uart0_printf("\nTX data: 0x");
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neorv32_uart0_printf("\nTX data: 0x");
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aux_print_hex_byte((uint8_t)(tx_data >> 16));
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aux_print_hex_byte((uint8_t)(tx_data >> 16));
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aux_print_hex_byte((uint8_t)(tx_data >> 8));
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aux_print_hex_byte((uint8_t)(tx_data >> 8));
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aux_print_hex_byte((uint8_t)(tx_data));
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aux_print_hex_byte((uint8_t)(tx_data));
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neorv32_uart0_printf("\nRX data: 0x");
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neorv32_uart0_printf("\nRX data: 0x");
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aux_print_hex_byte((uint8_t)(rx_data >> 16));
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aux_print_hex_byte((uint8_t)(rx_data >> 16));
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aux_print_hex_byte((uint8_t)(rx_data >> 8));
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aux_print_hex_byte((uint8_t)(rx_data >> 8));
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aux_print_hex_byte((uint8_t)(rx_data));
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aux_print_hex_byte((uint8_t)(rx_data));
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neorv32_uart0_printf("\n");
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neorv32_uart0_printf("\n");
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}
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}
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else {
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else {
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neorv32_uart0_printf("\nTX data: 0x%x\n", tx_data);
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neorv32_uart0_printf("\nTX data: 0x%x\n", tx_data);
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neorv32_uart0_printf("RX data: 0x%x\n", rx_data);
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neorv32_uart0_printf("RX data: 0x%x\n", rx_data);
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}
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}
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Configure SPI module
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* Configure SPI module
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**************************************************************************/
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**************************************************************************/
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void spi_setup(void) {
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void spi_setup(void) {
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char terminal_buffer[9];
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char terminal_buffer[9];
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uint8_t spi_prsc, clk_phase, clk_pol, data_size;
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uint8_t spi_prsc, clk_phase, clk_pol, data_size;
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uint32_t tmp;
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uint32_t tmp;
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// ---- SPI clock ----
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// ---- SPI clock ----
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while (1) {
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while (1) {
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neorv32_uart0_printf("Select SPI clock prescaler (0..7): ");
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neorv32_uart0_printf("Select SPI clock prescaler (0..7): ");
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neorv32_uart0_scan(terminal_buffer, 2, 1);
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neorv32_uart0_scan(terminal_buffer, 2, 1);
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tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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if (tmp > 8) {
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if (tmp > 8) {
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neorv32_uart0_printf("\nInvalid selection!\n");
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neorv32_uart0_printf("\nInvalid selection!\n");
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}
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}
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else {
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else {
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spi_prsc = (uint8_t)tmp;
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spi_prsc = (uint8_t)tmp;
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break;
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break;
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}
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}
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}
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}
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uint32_t div = 0;
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uint32_t div = 0;
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switch (spi_prsc) {
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switch (spi_prsc) {
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case 0: div = 2 * 2; break;
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case 0: div = 2 * 2; break;
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case 1: div = 2 * 4; break;
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case 1: div = 2 * 4; break;
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case 2: div = 2 * 8; break;
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case 2: div = 2 * 8; break;
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case 3: div = 2 * 64; break;
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case 3: div = 2 * 64; break;
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case 4: div = 2 * 128; break;
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case 4: div = 2 * 128; break;
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case 5: div = 2 * 1024; break;
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case 5: div = 2 * 1024; break;
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case 6: div = 2 * 2048; break;
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case 6: div = 2 * 2048; break;
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case 7: div = 2 * 4096; break;
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case 7: div = 2 * 4096; break;
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default: div = 0; break;
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default: div = 0; break;
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}
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}
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uint32_t clock = NEORV32_SYSINFO.CLK / div;
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uint32_t clock = NEORV32_SYSINFO.CLK / div;
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neorv32_uart0_printf("\n+ New SPI clock speed = %u Hz\n", clock);
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neorv32_uart0_printf("\n+ New SPI clock speed = %u Hz\n", clock);
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// ---- SPI clock mode ----
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// ---- SPI clock mode ----
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while (1) {
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while (1) {
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neorv32_uart0_printf("Select SPI clock mode (0..3): ");
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neorv32_uart0_printf("Select SPI clock mode (0..3): ");
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neorv32_uart0_scan(terminal_buffer, 2, 1);
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neorv32_uart0_scan(terminal_buffer, 2, 1);
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tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
if (tmp > 4) {
|
if (tmp > 4) {
|
neorv32_uart0_printf("\nInvalid selection!\n");
|
neorv32_uart0_printf("\nInvalid selection!\n");
|
}
|
}
|
else {
|
else {
|
clk_pol = (uint8_t)((tmp >> 1) & 1);
|
clk_pol = (uint8_t)((tmp >> 1) & 1);
|
clk_phase = (uint8_t)(tmp & 1);
|
clk_phase = (uint8_t)(tmp & 1);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
neorv32_uart0_printf("\n+ New SPI clock mode = %u\n", tmp);
|
neorv32_uart0_printf("\n+ New SPI clock mode = %u\n", tmp);
|
|
|
// ---- SPI transfer data quantity ----
|
// ---- SPI transfer data quantity ----
|
|
|
while (1) {
|
while (1) {
|
neorv32_uart0_printf("Select SPI data transfer size in bytes (1,2,3,4): ");
|
neorv32_uart0_printf("Select SPI data transfer size in bytes (1,2,3,4): ");
|
neorv32_uart0_scan(terminal_buffer, 2, 1);
|
neorv32_uart0_scan(terminal_buffer, 2, 1);
|
tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
tmp = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
if ( (tmp < 1) || (tmp > 4)) {
|
if ( (tmp < 1) || (tmp > 4)) {
|
neorv32_uart0_printf("\nInvalid selection!\n");
|
neorv32_uart0_printf("\nInvalid selection!\n");
|
}
|
}
|
else {
|
else {
|
data_size = (uint8_t)(tmp - 1);
|
data_size = (uint8_t)(tmp - 1);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
neorv32_uart0_printf("\n+ New SPI data size = %u-byte(s)\n\n", tmp);
|
neorv32_uart0_printf("\n+ New SPI data size = %u-byte(s)\n\n", tmp);
|
|
|
neorv32_spi_setup(spi_prsc, clk_phase, clk_pol, data_size);
|
neorv32_spi_setup(spi_prsc, clk_phase, clk_pol, data_size);
|
spi_configured = 1; // SPI is configured now
|
spi_configured = 1; // SPI is configured now
|
spi_size = tmp;
|
spi_size = tmp;
|
}
|
}
|
|
|
|
|
|
/**********************************************************************//**
|
|
* Read (dump) flash
|
|
**************************************************************************/
|
|
void flash_read(void) {
|
|
|
|
char terminal_buffer[9];
|
|
uint32_t tmp, addr, channel, num_addr_bytes;
|
|
|
|
if (spi_configured == 0) {
|
|
neorv32_uart0_printf("SPI module not configured yet! Use 'setup' to configure SPI module.\n");
|
|
return;
|
|
}
|
|
|
|
// configure 8-bit SPI mode
|
|
tmp = NEORV32_SPI.CTRL;
|
|
tmp &= ~(0x03 << SPI_CTRL_SIZE0);
|
|
NEORV32_SPI.CTRL = tmp;
|
|
neorv32_uart0_printf("Warning! SPI size configuration has been overridden!\n");
|
|
|
|
// how many address bytes?
|
|
while (1) {
|
|
neorv32_uart0_printf("Enter number of address bytes (2,3): ");
|
|
neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
|
|
num_addr_bytes = hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
if ((num_addr_bytes < 2) || (num_addr_bytes > 3)) {
|
|
neorv32_uart0_printf("\nInvalid channel selection!\n");
|
|
continue;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// chip-select
|
|
while (1) {
|
|
neorv32_uart0_printf("\nSelect flash chip-select line [0..7]: ");
|
|
neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
|
|
channel = hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
if (channel > 7) {
|
|
neorv32_uart0_printf("\nInvalid channel selection!\n");
|
|
continue;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// base address
|
|
neorv32_uart0_printf("\nEnter base address (8 hex chars): 0x");
|
|
neorv32_uart0_scan(terminal_buffer, 9, 1);
|
|
addr = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
|
|
neorv32_uart0_printf("\nPress any key to start. Press any key to stop reading.\n");
|
|
while(neorv32_uart0_char_received() == 0);
|
|
|
|
while(1) {
|
|
if (neorv32_uart0_char_received()) { // abort when key pressed
|
|
break;
|
|
}
|
|
|
|
if ((addr & 0x1f) == 0) {
|
|
neorv32_uart0_printf("\n%x: ", addr);
|
|
}
|
|
|
|
// read byte
|
|
neorv32_spi_cs_en((uint8_t)channel);
|
|
neorv32_spi_trans(SPI_FLASH_CMD_READ);
|
|
if (num_addr_bytes == 3) {
|
|
neorv32_spi_trans(addr >> 16);
|
|
}
|
|
neorv32_spi_trans(addr >> 8);
|
|
neorv32_spi_trans(addr >> 0);
|
|
tmp = neorv32_spi_trans(0);
|
|
neorv32_spi_cs_dis((uint8_t)channel);
|
|
|
|
aux_print_hex_byte((uint8_t)tmp);
|
|
neorv32_uart0_putc(' ');
|
|
|
|
addr++;
|
|
}
|
|
|
|
neorv32_uart0_printf("\n");
|
|
spi_configured = 0;
|
|
}
|
|
|
|
|
|
/**********************************************************************//**
|
|
* Write flash
|
|
**************************************************************************/
|
|
void flash_write(void) {
|
|
|
|
neorv32_uart0_printf("work-in-progress\n");
|
|
return;
|
|
|
|
char terminal_buffer[9], rx_data;
|
|
uint32_t tmp, addr, channel, num_data_bytes, num_addr_bytes;
|
|
int res;
|
|
|
|
if (spi_configured == 0) {
|
|
neorv32_uart0_printf("SPI module not configured yet! Use 'setup' to configure SPI module.\n");
|
|
return;
|
|
}
|
|
|
|
// configure 8-bit SPI mode
|
|
tmp = NEORV32_SPI.CTRL;
|
|
tmp &= ~(0x03 << SPI_CTRL_SIZE0);
|
|
NEORV32_SPI.CTRL = tmp;
|
|
neorv32_uart0_printf("Warning! SPI size configuration has been overridden!\n");
|
|
|
|
// how many address bytes?
|
|
while (1) {
|
|
neorv32_uart0_printf("Enter number of address bytes (2,3): ");
|
|
neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
|
|
num_addr_bytes = hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
if ((num_addr_bytes < 2) || (num_addr_bytes > 3)) {
|
|
neorv32_uart0_printf("\nInvalid channel selection!\n");
|
|
continue;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// how many bytes?
|
|
neorv32_uart0_printf("\nEnter total number of bytes to write (%u hex chars): ", num_addr_bytes*2);
|
|
neorv32_uart0_scan(terminal_buffer, num_addr_bytes*2+1, 1); // 1 hex char plus '\0'
|
|
num_data_bytes = hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
|
|
// chip-select
|
|
while (1) {
|
|
neorv32_uart0_printf("\nSelect flash chip-select line [0..7]: ");
|
|
neorv32_uart0_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
|
|
channel = hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
if (channel > 7) {
|
|
neorv32_uart0_printf("\nInvalid channel selection!\n");
|
|
continue;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// base address
|
|
neorv32_uart0_printf("\nEnter base address (8 hex chars): 0x");
|
|
neorv32_uart0_scan(terminal_buffer, 9, 1);
|
|
addr = (uint32_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
|
|
|
|
// start!
|
|
neorv32_uart0_printf("\nSend raw data via UART (%u bytes)...\n", num_data_bytes);
|
|
while (neorv32_uart0_tx_busy());
|
|
|
|
// clear UART0 FIFOs
|
|
neorv32_uart0_disable();
|
|
neorv32_uart0_enable();
|
|
|
|
while (num_data_bytes) {
|
|
|
|
// write enable
|
|
neorv32_spi_cs_en((uint8_t)channel);
|
|
neorv32_spi_trans(SPI_FLASH_CMD_WREN);
|
|
neorv32_spi_cs_dis((uint8_t)channel);
|
|
|
|
// get new UART data
|
|
while(1) {
|
|
res = neorv32_uart0_getc_safe(&rx_data);
|
|
if (res == -1) {
|
|
continue;
|
|
}
|
|
if (res == 0) {
|
|
break;
|
|
}
|
|
else {
|
|
neorv32_uart0_printf("UART transmission error (%i)!\n", res);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// write byte
|
|
neorv32_spi_cs_en((uint8_t)channel);
|
|
neorv32_spi_trans(SPI_FLASH_CMD_WRITE);
|
|
if (num_addr_bytes == 3) {
|
|
neorv32_spi_trans(addr >> 16);
|
|
}
|
|
neorv32_spi_trans(addr >> 8);
|
|
neorv32_spi_trans(addr >> 0);
|
|
neorv32_spi_trans((uint32_t)rx_data);
|
|
neorv32_spi_cs_dis((uint8_t)channel);
|
|
|
|
// check status register
|
|
while (1) {
|
|
neorv32_spi_cs_en((uint8_t)channel);
|
|
neorv32_spi_trans(SPI_FLASH_CMD_READ_SR);
|
|
tmp = neorv32_spi_trans(0);
|
|
neorv32_spi_cs_dis((uint8_t)channel);
|
|
if ((tmp & 0x01) == 0) { // write-in-progress flag cleared?
|
|
break;
|
|
}
|
|
}
|
|
|
|
addr++;
|
|
num_data_bytes--;
|
|
}
|
|
|
|
neorv32_uart0_printf("\n");
|
|
spi_configured = 0;
|
|
}
|
|
|
|
|
/**********************************************************************//**
|
/**********************************************************************//**
|
* Helper function to convert N hex chars string into uint32_T
|
* Helper function to convert N hex chars string into uint32_T
|
*
|
*
|
* @param[in,out] buffer Pointer to array of chars to convert into number.
|
* @param[in,out] buffer Pointer to array of chars to convert into number.
|
* @param[in,out] length Length of the conversion string.
|
* @param[in,out] length Length of the conversion string.
|
* @return Converted number.
|
* @return Converted number.
|
**************************************************************************/
|
**************************************************************************/
|
uint32_t hexstr_to_uint(char *buffer, uint8_t length) {
|
uint32_t hexstr_to_uint(char *buffer, uint8_t length) {
|
|
|
uint32_t res = 0, d = 0;
|
uint32_t res = 0, d = 0;
|
char c = 0;
|
char c = 0;
|
|
|
while (length--) {
|
while (length--) {
|
c = *buffer++;
|
c = *buffer++;
|
|
|
if ((c >= '0') && (c <= '9'))
|
if ((c >= '0') && (c <= '9'))
|
d = (uint32_t)(c - '0');
|
d = (uint32_t)(c - '0');
|
else if ((c >= 'a') && (c <= 'f'))
|
else if ((c >= 'a') && (c <= 'f'))
|
d = (uint32_t)((c - 'a') + 10);
|
d = (uint32_t)((c - 'a') + 10);
|
else if ((c >= 'A') && (c <= 'F'))
|
else if ((c >= 'A') && (c <= 'F'))
|
d = (uint32_t)((c - 'A') + 10);
|
d = (uint32_t)((c - 'A') + 10);
|
else
|
else
|
d = 0;
|
d = 0;
|
|
|
res = res + (d << (length*4));
|
res = res + (d << (length*4));
|
}
|
}
|
|
|
return res;
|
return res;
|
}
|
}
|
|
|
|
|
/**********************************************************************//**
|
/**********************************************************************//**
|
* Print HEX byte.
|
* Print HEX byte.
|
*
|
*
|
* @param[in] byte Byte to be printed as 2-cahr hex value.
|
* @param[in] byte Byte to be printed as 2-cahr hex value.
|
**************************************************************************/
|
**************************************************************************/
|
void aux_print_hex_byte(uint8_t byte) {
|
void aux_print_hex_byte(uint8_t byte) {
|
|
|
static const char symbols[] = "0123456789abcdef";
|
static const char symbols[] = "0123456789abcdef";
|
|
|
neorv32_uart0_putc(symbols[(byte >> 4) & 0x0f]);
|
neorv32_uart0_putc(symbols[(byte >> 4) & 0x0f]);
|
neorv32_uart0_putc(symbols[(byte >> 0) & 0x0f]);
|
neorv32_uart0_putc(symbols[(byte >> 0) & 0x0f]);
|
}
|
}
|
|
|
