sample_01_flash_write.cpp

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#include "sample_select.h"

#if (SAMPLE_PROGRAM_NO == 1)
// SAMPLE_PROGRAM_NO  1 : FlashAPI sample
//
// This is a sample program of flash writing.
// Writes to the address set in FLASH_ADDR.
// Erasing is in units of 4096 bytes.

#include "mbed.h"
#include "mbed_drv_cfg.h"

#define FLASH_ADDR  (FLASH_BASE + FLASH_SIZE - 0x100000)

static uint8_t flash_work_buff[256];

static void disp_flash_work_buff(void) {
    for (uint32_t i = 0; i < sizeof(flash_work_buff); i++) {
        if ((i != 0) && ((i & 0x0F) == 0x00)) {
            printf("\r\n");
        }
        printf("%02x ", flash_work_buff[i]);
    }
    printf("\r\n\r\n");
}

int main(void) {
    int ret;
    uint32_t i;
    FlashIAP flash;

    flash.init();

    // read
    memset(flash_work_buff, 0, sizeof(flash_work_buff));
    ret = flash.read(flash_work_buff, FLASH_ADDR, sizeof(flash_work_buff));
    printf("flash.read ret=%d\r\n", (int)ret);
    disp_flash_work_buff();

    // erase
    ret = flash.erase(FLASH_ADDR, flash.get_sector_size(FLASH_ADDR));
    printf("flash.erase ret=%d\r\n", (int)ret);

    // read
    memset(flash_work_buff, 0, sizeof(flash_work_buff));
    ret = flash.read(flash_work_buff, FLASH_ADDR, sizeof(flash_work_buff));
    printf("flash.read ret=%d\r\n", (int)ret);
    disp_flash_work_buff();

    // write
    for (i = 0; i < sizeof(flash_work_buff); i++) {
        flash_work_buff[i] = i;
    }
    ret = flash.program(flash_work_buff, FLASH_ADDR, sizeof(flash_work_buff));
    printf("flash.write ret=%d\r\n", (int)ret);

    // read
    memset(flash_work_buff, 0, sizeof(flash_work_buff));
    ret = flash.read(flash_work_buff, FLASH_ADDR, sizeof(flash_work_buff));
    printf("flash.read ret=%d\r\n", (int)ret);
    disp_flash_work_buff();

    while (1);
}

#endif