Hi,
I had a problem using your (nRf's) implementation of block device with my flash memory (I think that exact model is not relevant here). I'm using SDK 15.2 with NRF52840. Earlier I was using some code taken from qspi example - on it I was able to read, write and so on my flash memory. When I moved to block device based implementation the whole thing stopped working.
After some research I found that in the method of qspi initialization in block device:
static ret_code_t block_dev_qspi_init(nrf_block_dev_t const * p_blk_dev,
nrf_block_dev_ev_handler ev_handler,
void const * p_context)
{
....
nrf_qspi_cinstr_conf_t cinstr_cfg = {
.opcode = QSPI_STD_CMD_RSTEN,
.length = NRF_QSPI_CINSTR_LEN_1B,
.io2_level = true,
.io3_level = true,
.wipwait = true,
.wren = true
};
/* Send reset enable */
ret = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
if (ret != NRF_SUCCESS)
{
NRF_LOG_INST_ERROR(p_qspi_dev->p_log, "QSPI reset enable command error: %"PRIu32"", ret);
return ret;
}
/* Send reset command */
cinstr_cfg.opcode = QSPI_STD_CMD_RST;
ret = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
if (ret != NRF_SUCCESS)
{
NRF_LOG_INST_ERROR(p_qspi_dev->p_log, "QSPI reset command error: %"PRIu32"", ret);
return ret;
}
/* Get 3 byte identification value */
uint8_t rdid_buf[3] = {0, 0, 0};
cinstr_cfg.opcode = QSPI_STD_CMD_READ_ID;
cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_4B;
ret = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, rdid_buf);
if (ret != NRF_SUCCESS)
{
NRF_LOG_INST_ERROR(p_qspi_dev->p_log, "QSPI get 3 byte id error: %"PRIu32"", ret);
return ret;
}
....
}there is missing one (I think important) thing, which is setting quad mode.
What I've done was to add to my flash driver this method:
ret_code_t BlockDeviceNrf::enable_qspi_quad_mode() {
#define QSPI_MEM_CMD_WRSR 0x01
#define QSPI_MEM_QUAD_MODE 0x40
uint8_t transfer_byte = QSPI_MEM_QUAD_MODE;
uint8_t rx_byte = 0x00;
nrf_qspi_cinstr_conf_t cinstr;
cinstr.io2_level = true;
cinstr.io3_level = true;
cinstr.wipwait = true;
cinstr.wren = true;
cinstr.opcode = QSPI_MEM_CMD_WRSR;
cinstr.length = NRF_QSPI_CINSTR_LEN_4B;
return nrfx_qspi_cinstr_xfer(&cinstr, &transfer_byte, nullptr);
}
and I'm calling it after nrf_blk_dec_init call. I'm not sure if that is correct solution, but it works for me.
Am I right that setting quad mode is missing in qspi initialization in block device? What is a reason for that (maybe that is expected)? Am I missing something?
