| Line 156... |
Line 156... |
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_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_cmd(uint8_t cmd);
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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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/**********************************************************************//**
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/**********************************************************************//**
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* Bootloader main.
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* Bootloader main.
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**************************************************************************/
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**************************************************************************/
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| Line 310... |
Line 311... |
/**********************************************************************//**
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/**********************************************************************//**
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* Start application program at the beginning of instruction space.
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* Start application program at the beginning of instruction space.
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**************************************************************************/
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**************************************************************************/
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void start_app(void) {
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void start_app(void) {
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// executable available?
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if (neorv32_cpu_csr_read(CSR_MSCRATCH) == 0) {
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neorv32_uart_print("No executable available.");
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return;
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}
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// no need to shutdown or reset the used peripherals
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// no need to shutdown or reset the used peripherals
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// -> this will be done by application's crt0
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// -> this will be done by application's crt0
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// deactivate IRQs and IRQ sources
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// deactivate IRQs and IRQ sources
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neorv32_cpu_dint();
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neorv32_cpu_dint();
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| Line 621... |
Line 628... |
* @param[in] addr Flash read address.
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* @param[in] addr Flash read address.
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* @return Read byte from SPI flash.
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* @return Read byte from SPI flash.
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**************************************************************************/
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**************************************************************************/
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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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union {
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uint32_t uint32;
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uint8_t uint8[sizeof(uint32_t)];
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} address;
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address.uint32 = addr;
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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);
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neorv32_spi_trans(SPI_FLASH_CMD_READ);
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neorv32_spi_trans(address.uint8[2]);
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spi_flash_write_addr(addr);
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neorv32_spi_trans(address.uint8[1]);
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neorv32_spi_trans(address.uint8[0]);
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uint8_t rdata = (uint8_t)neorv32_spi_trans(0);
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uint8_t rdata = (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);
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return rdata;
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return rdata;
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| Line 650... |
Line 648... |
* @param[in] addr SPI flash read address.
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* @param[in] addr SPI flash read address.
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* @param[in] wdata SPI flash read data.
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* @param[in] wdata SPI flash read data.
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**************************************************************************/
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**************************************************************************/
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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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union {
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spi_flash_write_enable(); // allow write-access
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uint32_t uint32;
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uint8_t uint8[sizeof(uint32_t)];
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} address;
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address.uint32 = addr;
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spi_flash_write_cmd(SPI_FLASH_CMD_WRITE_ENABLE); // allow write-access
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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_PAGE_PROGRAM);
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neorv32_spi_trans(SPI_FLASH_CMD_PAGE_PROGRAM);
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neorv32_spi_trans(address.uint8[2]);
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spi_flash_write_addr(addr);
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neorv32_spi_trans(address.uint8[1]);
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neorv32_spi_trans(address.uint8[0]);
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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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while (1) {
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| Line 707... |
Line 696... |
*
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*
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* @param[in] addr Base address of sector to erase.
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* @param[in] addr Base address of sector to erase.
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**************************************************************************/
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**************************************************************************/
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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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union {
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spi_flash_write_enable(); // allow write-access
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uint32_t uint32;
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uint8_t uint8[sizeof(uint32_t)];
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} address;
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address.uint32 = addr;
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spi_flash_write_cmd(SPI_FLASH_CMD_WRITE_ENABLE); // allow write-access
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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_SECTOR_ERASE);
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neorv32_spi_trans(SPI_FLASH_CMD_SECTOR_ERASE);
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neorv32_spi_trans(address.uint8[2]);
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spi_flash_write_addr(addr);
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neorv32_spi_trans(address.uint8[1]);
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neorv32_spi_trans(address.uint8[0]);
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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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while (1) {
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uint8_t tmp = spi_flash_read_status();
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uint8_t tmp = spi_flash_read_status();
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| Line 773... |
Line 753... |
return id;
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return id;
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Write command to flash.
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* Enable flash write access.
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*
|
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* @param[in] cmd Command byte.
|
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**************************************************************************/
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**************************************************************************/
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void spi_flash_write_cmd(uint8_t cmd) {
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void spi_flash_write_enable(void) {
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|
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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_WRITE_ENABLE);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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}
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neorv32_spi_trans(cmd);
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neorv32_spi_cs_dis(SPI_FLASH_CS);
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/**********************************************************************//**
|
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* Send address word to flash.
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*
|
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* @param[in] addr Address word.
|
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**************************************************************************/
|
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void spi_flash_write_addr(uint32_t addr) {
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union {
|
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uint32_t uint32;
|
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uint8_t uint8[sizeof(uint32_t)];
|
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} address;
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|
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address.uint32 = addr;
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|
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neorv32_spi_trans(address.uint8[2]);
|
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neorv32_spi_trans(address.uint8[1]);
|
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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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