RE: Write byte

svecoldr — Thu, 03 Mar 2016 12:18:35 GMT

This helped me in understanding how flash writing works: devzone.nordicsemi.com/.../

RE: Write byte

Petter Myhre — Wed, 22 Oct 2014 12:22:05 GMT

The byte you want to write is 0xBB. To write to a specific byte use: 0xFFFFFFBB, 0xFFFFBBFF, 0xFFBBFFFF, 0xBBFFFFFF. You can write to each byte once(if you don't exploit it), between each flash page erase.

RE: Write byte

max — Wed, 22 Oct 2014 12:14:07 GMT

This is a word Write function. I need a byte write

RE: Write byte

Petter Myhre — Tue, 23 Sep 2014 11:40:55 GMT

/**@brief Flash Write
 *
 * Commands to write a buffer to flash
 *
 * This call initiates the flash access command, and its completion will be communicated to the
 * application with exactly one of the following events:
 *      - NRF_EVT_FLASH_OPERATION_SUCCESS - The command was successfully completed.
 *      - NRF_EVT_FLASH_OPERATION_ERROR   - The command could not be started.
 *
 * @note
 *      - This call takes control over the radio and the CPU during flash erase and write to make sure that
 *        they will not interfere with the flash access. This means that all interrupts will be blocked
 *        for a predictable time (depending on the NVMC specification in nRF51 Series Reference Manual
 *        and the command parameters).
 *
 *
 * @param[in]  p_dst Pointer to start of flash location to be written.
 * @param[in]  p_src Pointer to buffer with data to be written
 * @param[in]  size  Number of 32-bit words to write. Maximum size is 256 32bit words.
 *
 * @retval ::NRF_ERROR_INVALID_ADDR   Tried to write to a non existing flash address, or p_dst or p_src was unaligned.
 * @retval ::NRF_ERROR_BUSY           The previous command has not yet completed.
 * @retval ::NRF_ERROR_INVALID_LENGTH Size was 0, or more than 256 words.
 * @retval ::NRF_ERROR_FORBIDDEN      Tried to write to or read from protected location.
 * @retval ::NRF_SUCCESS              The command was accepted.
 */
SVCALL(SD_FLASH_WRITE, uint32_t, sd_flash_write(uint32_t * const p_dst, uint32_t const * const p_src, uint32_t size));