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@ -23,11 +23,12 @@
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "spi_flash.h"
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#include "spi_flash_api.h"
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#include <stdint.h>
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#include <string.h>
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#include "external_flash/common_commands.h"
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#include "peripherals.h"
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#include "hal_gpio.h"
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@ -45,11 +46,32 @@ static void flash_disable(void) {
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gpio_set_pin_level(SPI_FLASH_CS_PIN, true);
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}
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void spi_flash_command(uint8_t* request, uint8_t* response, uint32_t length) {
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struct spi_xfer xfer = { request, response, length };
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static bool transfer(uint8_t* command, uint32_t command_length, uint8_t* data_in, uint8_t* data_out, uint32_t data_length) {
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struct spi_xfer xfer = { command, NULL, command_length };
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flash_enable();
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spi_m_sync_transfer(&spi_flash_desc, &xfer);
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int32_t status = spi_m_sync_transfer(&spi_flash_desc, &xfer);
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if (status >= 0 && !(data_in == NULL && data_out == NULL)) {
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struct spi_xfer data_xfer = {data_in, data_out, data_length};
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status = spi_m_sync_transfer(&spi_flash_desc, &data_xfer);
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}
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flash_disable();
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return status >= 0;
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}
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static bool transfer_command(uint8_t command, uint8_t* data_in, uint8_t* data_out, uint32_t data_length) {
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return transfer(&command, 1, data_in, data_out, data_length);
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}
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bool spi_flash_command(uint8_t command) {
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return transfer_command(command, NULL, NULL, 0);
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}
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bool spi_flash_read_command(uint8_t command, uint8_t* data, uint32_t data_length) {
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return transfer_command(command, NULL, data, data_length);
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}
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bool spi_flash_write_command(uint8_t command, uint8_t* data, uint32_t data_length) {
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return transfer_command(command, data, NULL, data_length);
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}
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// Pack the low 24 bits of the address into a uint8_t array.
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@ -59,32 +81,24 @@ static void address_to_bytes(uint32_t address, uint8_t* bytes) {
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bytes[2] = address & 0xff;
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}
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void spi_flash_sector_command(uint8_t command, uint32_t address) {
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bool spi_flash_sector_command(uint8_t command, uint32_t address) {
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uint8_t request[4] = {command, 0x00, 0x00, 0x00};
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address_to_bytes(address, page_program_request + 1);
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struct spi_xfer xfer = { request, NULL, 4 };
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flash_enable();
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spi_m_sync_transfer(&spi_flash_desc, &xfer);
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flash_disable();
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address_to_bytes(address, request + 1);
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return transfer(request, 4, NULL, NULL, 0);
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}
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bool spi_flash_write_data(uint32_t address, uint8_t* data, uint32_t data_length) {
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flash_enable();
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uint8_t page_program_request[4] = {CMD_PAGE_PROGRAM, 0x00, 0x00, 0x00};
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uint8_t request[4] = {CMD_PAGE_PROGRAM, 0x00, 0x00, 0x00};
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// Write the SPI flash write address into the bytes following the command byte.
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address_to_bytes(address, page_program_request + 1);
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struct spi_xfer page_program_xfer = {request, 0, request_length};
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int32_t status = spi_m_sync_transfer(&spi_flash_desc, &page_program_xfer);
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if (status >= 0) {
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struct spi_xfer write_data_buffer_xfer = {data, 0, data_length};
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status = spi_m_sync_transfer(&spi_flash_desc, &write_data_buffer_xfer);
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}
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flash_disable();
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return status >= 0;
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address_to_bytes(address, request + 1);
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return transfer(request, 4, data, NULL, data_length);
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}
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bool spi_flash_read_data(uint32_t address, uint8_t* data, uint32_t data_length) {
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uint8_t request[4] = {CMD_READ_DATA, 0x00, 0x00, 0x00};
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// Write the SPI flash write address into the bytes following the command byte.
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address_to_bytes(address, request + 1);
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return transfer(request, 4, NULL, data, data_length);
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}
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void spi_flash_init(void) {
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Scott Shawcroft
5 years ago