stm32片上flash数据结构最小擦除单位是多少

rtt驱动是这样分块定义的
#if defined(RT_USING_FAL)
static int fal_flash_read_16k(long offset, rt_uint8_t *buf, size_t size);
static int fal_flash_read_64k(long offset, rt_uint8_t *buf, size_t size);
static int fal_flash_read_128k(long offset, rt_uint8_t *buf, size_t size);
static int fal_flash_write_16k(long offset, const rt_uint8_t *buf, size_t size);
static int fal_flash_write_64k(long offset, const rt_uint8_t *buf, size_t size);
static int fal_flash_write_128k(long offset, const rt_uint8_t *buf, size_t size);
static int fal_flash_erase_16k(long offset, size_t size);
static int fal_flash_erase_64k(long offset, size_t size);
static int fal_flash_erase_128k(long offset, size_t size);
const struct fal_flash_dev stm32_onchip_flash_16k = { "onchip_flash_16k", STM32_FLASH_START_ADRESS_16K, FLASH_SIZE_GRANULARITY_16K, (16 * 1024), {NULL, fal_flash_read_16k, fal_flash_write_16k, fal_flash_erase_16k} };
const struct fal_flash_dev stm32_onchip_flash_64k = { "onchip_flash_64k", STM32_FLASH_START_ADRESS_64K, FLASH_SIZE_GRANULARITY_64K, (64 * 1024), {NULL, fal_flash_read_64k, fal_flash_write_64k, fal_flash_erase_64k} };
const struct fal_flash_dev stm32_onchip_flash_128k = { "onchip_flash_128k", STM32_FLASH_START_ADRESS_128K, FLASH_SIZE_GRANULARITY_128K, (128 * 1024), {NULL, fal_flash_read_128k, fal_flash_write_128k, fal_flash_erase_128k} };
static int fal_flash_read_16k(long offset, rt_uint8_t *buf, size_t size)
{
    return stm32_flash_read(stm32_onchip_flash_16k.addr + offset, buf, size);
}
static int fal_flash_read_64k(long offset, rt_uint8_t *buf, size_t size)
{
    return stm32_flash_read(stm32_onchip_flash_64k.addr + offset, buf, size);
}
static int fal_flash_read_128k(long offset, rt_uint8_t *buf, size_t size)
{
    return stm32_flash_read(stm32_onchip_flash_128k.addr + offset, buf, size);
}
static int fal_flash_write_16k(long offset, const rt_uint8_t *buf, size_t size)
{
    return stm32_flash_write(stm32_onchip_flash_16k.addr + offset, buf, size);
}
static int fal_flash_write_64k(long offset, const rt_uint8_t *buf, size_t size)
{
    return stm32_flash_write(stm32_onchip_flash_64k.addr + offset, buf, size);
}
static int fal_flash_write_128k(long offset, const rt_uint8_t *buf, size_t size)
{
    return stm32_flash_write(stm32_onchip_flash_128k.addr + offset, buf, size);
}
static int fal_flash_erase_16k(long offset, size_t size)
{
    return stm32_flash_erase(stm32_onchip_flash_16k.addr + offset, size);
}
static int fal_flash_erase_64k(long offset, size_t size)
{
    return stm32_flash_erase(stm32_onchip_flash_64k.addr + offset, size);
}
static int fal_flash_erase_128k(long offset, size_t size)
{
    return stm32_flash_erase(stm32_onchip_flash_128k.addr + offset, size);
}
#endif
#endif /* BSP_USING_ON_CHIP_FLASH */

看你具体擦除的地方块大小是多少，就是起始地址那里到size结束，block是多少就是多少。

意思是说整片片上flash的大小吗，但是这个名字是blocksize，是每个块的大小啊，按理说每块大小应该是2048或者4096字节才合理，一般spiflash才有block的参数，片上flash按芯片参考手册上都是按page和bank来划分区域，没有block这个参数。