| Line 163... |
Line 163... |
void save_exe(void);
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void save_exe(void);
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uint32_t get_exe_word(int src, uint32_t addr);
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uint32_t get_exe_word(int src, uint32_t addr);
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void system_error(uint8_t err_code);
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void system_error(uint8_t err_code);
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void print_hex_word(uint32_t num);
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void print_hex_word(uint32_t num);
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// SPI flash access
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// SPI flash driver functions
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uint8_t spi_flash_read_byte(uint32_t addr);
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uint8_t spi_flash_read_byte(uint32_t addr);
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void spi_flash_write_byte(uint32_t addr, uint8_t wdata);
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void spi_flash_write_byte(uint32_t addr, uint8_t wdata);
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void spi_flash_write_word(uint32_t addr, uint32_t wdata);
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void spi_flash_write_word(uint32_t addr, uint32_t wdata);
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void spi_flash_erase_sector(uint32_t addr);
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void spi_flash_erase_sector(uint32_t addr);
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uint8_t spi_flash_read_status(void);
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uint8_t spi_flash_read_1st_id(void);
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uint8_t spi_flash_read_1st_id(void);
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void spi_flash_write_wait(void);
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void spi_flash_write_enable(void);
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void spi_flash_write_enable(void);
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void spi_flash_write_addr(uint32_t addr);
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void spi_flash_write_addr(uint32_t addr);
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/**********************************************************************//**
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/**********************************************************************//**
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| Line 221... |
Line 221... |
// ------------------------------------------------
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// ------------------------------------------------
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// Show bootloader intro and system info
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// Show bootloader intro and system info
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// ------------------------------------------------
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// ------------------------------------------------
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neorv32_uart_print("\n\n\n\n<< NEORV32 Bootloader >>\n\n"
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neorv32_uart_print("\n\n\n\n<< NEORV32 Bootloader >>\n\n"
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"BLDV: "__DATE__"\nHWV: ");
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"BLDV: "__DATE__"\nHWV: ");
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neorv32_rte_print_hw_version();
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print_hex_word(neorv32_cpu_csr_read(CSR_MIMPID));
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neorv32_uart_print("\nCLK: ");
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neorv32_uart_print("\nCLK: ");
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print_hex_word(SYSINFO_CLK);
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print_hex_word(SYSINFO_CLK);
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neorv32_uart_print(" Hz\nUSER: ");
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neorv32_uart_print(" Hz\nUSER: ");
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print_hex_word(SYSINFO_USER_CODE);
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print_hex_word(SYSINFO_USER_CODE);
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neorv32_uart_print("\nMISA: ");
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neorv32_uart_print("\nMISA: ");
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| Line 606... |
Line 606... |
}
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}
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// -------------------------------------------------------------------------------------
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// -------------------------------------------------------------------------------------
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// SPI flash functions
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// SPI flash driver functions
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// -------------------------------------------------------------------------------------
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// -------------------------------------------------------------------------------------
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/**********************************************************************//**
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/**********************************************************************//**
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* Read byte from SPI flash.
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* Read byte from SPI flash.
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*
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*
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| Line 647... |
Line 647... |
spi_flash_write_addr(addr);
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spi_flash_write_addr(addr);
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neorv32_spi_trans(wdata);
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neorv32_spi_trans(wdata);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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while (1) {
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spi_flash_write_wait(); // wait for write operation to finish
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uint8_t tmp = spi_flash_read_status();
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if ((tmp & 0x01) == 0) { // write in progress flag cleared?
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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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/**********************************************************************//**
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/**********************************************************************//**
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* Write word to SPI flash.
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* Write word to SPI flash.
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| Line 694... |
Line 689... |
neorv32_spi_trans(SPI_FLASH_CMD_SECTOR_ERASE);
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neorv32_spi_trans(SPI_FLASH_CMD_SECTOR_ERASE);
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spi_flash_write_addr(addr);
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spi_flash_write_addr(addr);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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while (1) {
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spi_flash_write_wait(); // wait for write operation to finish
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uint8_t tmp = spi_flash_read_status();
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if ((tmp & 0x01) == 0) { // write in progress flag cleared?
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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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|
|
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/**********************************************************************//**
|
/**********************************************************************//**
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* Read status register.
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* Read first byte of ID (manufacturer ID), should be != 0x00.
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*
|
*
|
* @return Status register.
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* @note The first bit of the manufacturer ID is used to detect if a Flash is connected at all.
|
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*
|
|
* @return First byte of ID.
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**************************************************************************/
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**************************************************************************/
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uint8_t spi_flash_read_status(void) {
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uint8_t spi_flash_read_1st_id(void) {
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|
|
neorv32_spi_cs_en(SPI_FLASH_CS);
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neorv32_spi_cs_en(SPI_FLASH_CS);
|
|
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neorv32_spi_trans(SPI_FLASH_CMD_READ_STATUS);
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neorv32_spi_trans(SPI_FLASH_CMD_READ_ID);
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uint8_t status = (uint8_t)neorv32_spi_trans(0);
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uint8_t id = (uint8_t)neorv32_spi_trans(0);
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|
|
neorv32_spi_cs_dis(SPI_FLASH_CS);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
|
|
|
return status;
|
return id;
|
}
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}
|
|
|
|
|
/**********************************************************************//**
|
/**********************************************************************//**
|
* Read first byte of ID (manufacturer ID), should be != 0x00.
|
* Wait for flash write operation to finisch.
|
*
|
|
* @note The first bit of the manufacturer ID is used to detect if a Flash is connected at all.
|
|
*
|
|
* @return First byte of ID.
|
|
**************************************************************************/
|
**************************************************************************/
|
uint8_t spi_flash_read_1st_id(void) {
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void spi_flash_write_wait(void) {
|
|
|
|
while(1) {
|
|
|
neorv32_spi_cs_en(SPI_FLASH_CS);
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neorv32_spi_cs_en(SPI_FLASH_CS);
|
|
|
neorv32_spi_trans(SPI_FLASH_CMD_READ_ID);
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neorv32_spi_trans(SPI_FLASH_CMD_READ_STATUS);
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uint8_t id = (uint8_t)neorv32_spi_trans(0);
|
uint8_t status = (uint8_t)neorv32_spi_trans(0);
|
|
|
neorv32_spi_cs_dis(SPI_FLASH_CS);
|
neorv32_spi_cs_dis(SPI_FLASH_CS);
|
|
|
return id;
|
if ((status & 0x01) == 0) { // write in progress flag cleared?
|
|
break;
|
|
}
|
|
}
|
}
|
}
|
|
|
|
|
/**********************************************************************//**
|
/**********************************************************************//**
|
* Enable flash write access.
|
* Enable flash write access.
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| Line 771... |
Line 764... |
neorv32_spi_trans(address.uint8[2]);
|
neorv32_spi_trans(address.uint8[2]);
|
neorv32_spi_trans(address.uint8[1]);
|
neorv32_spi_trans(address.uint8[1]);
|
neorv32_spi_trans(address.uint8[0]);
|
neorv32_spi_trans(address.uint8[0]);
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}
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}
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No newline at end of file
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No newline at end of file
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