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updated bootloader

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This commit is contained in:
stnolting 2020-06-27 13:52:20 +02:00
parent ed40bdf0b7
commit 6954df489d
2 changed files with 576 additions and 580 deletions
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1080
rtl/core/neorv32_bootloader_image.vhd
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76
sw/bootloader/bootloader.c
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@ -158,7 +158,8 @@ void spi_flash_write_word(uint32_t addr, uint32_t wdata);
void spi_flash_erase_sector(uint32_t addr);
uint8_t spi_flash_read_status(void);
uint8_t spi_flash_read_1st_id(void);
void spi_flash_write_cmd(uint8_t cmd);
void spi_flash_write_enable(void);
void spi_flash_write_addr(uint32_t addr);
/**********************************************************************//**
@ -312,6 +313,12 @@ void print_help(void) {
**************************************************************************/
void start_app(void) {
// executable available?
if (neorv32_cpu_csr_read(CSR_MSCRATCH) == 0) {
neorv32_uart_print("No executable available.");
return;
}
// no need to shutdown or reset the used peripherals
// -> this will be done by application's crt0
@ -623,19 +630,10 @@ void print_proc_version(void) {
**************************************************************************/
uint8_t spi_flash_read_byte(uint32_t addr) {
union {
uint32_t uint32;
uint8_t uint8[sizeof(uint32_t)];
} address;
address.uint32 = addr;
neorv32_spi_cs_en(SPI_FLASH_CS);
neorv32_spi_trans(SPI_FLASH_CMD_READ);
neorv32_spi_trans(address.uint8[2]);
neorv32_spi_trans(address.uint8[1]);
neorv32_spi_trans(address.uint8[0]);
spi_flash_write_addr(addr);
uint8_t rdata = (uint8_t)neorv32_spi_trans(0);
neorv32_spi_cs_dis(SPI_FLASH_CS);
@ -652,21 +650,12 @@ uint8_t spi_flash_read_byte(uint32_t addr) {
**************************************************************************/
void spi_flash_write_byte(uint32_t addr, uint8_t wdata) {
union {
uint32_t uint32;
uint8_t uint8[sizeof(uint32_t)];
} address;
address.uint32 = addr;
spi_flash_write_cmd(SPI_FLASH_CMD_WRITE_ENABLE); // allow write-access
spi_flash_write_enable(); // allow write-access
neorv32_spi_cs_en(SPI_FLASH_CS);
neorv32_spi_trans(SPI_FLASH_CMD_PAGE_PROGRAM);
neorv32_spi_trans(address.uint8[2]);
neorv32_spi_trans(address.uint8[1]);
neorv32_spi_trans(address.uint8[0]);
spi_flash_write_addr(addr);
neorv32_spi_trans(wdata);
neorv32_spi_cs_dis(SPI_FLASH_CS);
@ -709,21 +698,12 @@ void spi_flash_write_word(uint32_t addr, uint32_t wdata) {
**************************************************************************/
void spi_flash_erase_sector(uint32_t addr) {
union {
uint32_t uint32;
uint8_t uint8[sizeof(uint32_t)];
} address;
address.uint32 = addr;
spi_flash_write_cmd(SPI_FLASH_CMD_WRITE_ENABLE); // allow write-access
spi_flash_write_enable(); // allow write-access
neorv32_spi_cs_en(SPI_FLASH_CS);
neorv32_spi_trans(SPI_FLASH_CMD_SECTOR_ERASE);
neorv32_spi_trans(address.uint8[2]);
neorv32_spi_trans(address.uint8[1]);
neorv32_spi_trans(address.uint8[0]);
spi_flash_write_addr(addr);
neorv32_spi_cs_dis(SPI_FLASH_CS);
@ -775,16 +755,32 @@ uint8_t spi_flash_read_1st_id(void) {
/**********************************************************************//**
* Write command to flash.
*
* @param[in] cmd Command byte.
* Enable flash write access.
**************************************************************************/
void spi_flash_write_cmd(uint8_t cmd) {
void spi_flash_write_enable(void) {
neorv32_spi_cs_en(SPI_FLASH_CS);
neorv32_spi_trans(cmd);
neorv32_spi_trans(SPI_FLASH_CMD_WRITE_ENABLE);
neorv32_spi_cs_dis(SPI_FLASH_CS);
}
/**********************************************************************//**
* Send address word to flash.
*
* @param[in] addr Address word.
**************************************************************************/
void spi_flash_write_addr(uint32_t addr) {
union {
uint32_t uint32;
uint8_t uint8[sizeof(uint32_t)];
} address;
address.uint32 = addr;
neorv32_spi_trans(address.uint8[2]);
neorv32_spi_trans(address.uint8[1]);
neorv32_spi_trans(address.uint8[0]);
}