Hello, everybody.
I'm working on combining the nRF52840 and the GPS module and are currently developing a program that stores real-time GPS data in an external flash memory(MX25R6435F).
So, I'm testing on Nordic DK board (PCA10056) that embedded MX25R6435F.
I tested it in your QSPI example and it worked very well. But I think this example is a bit of a problem. (Honestly, I don't know who the problem is: program or memory).
The problem is that QSPI_TEST_DATA_SIZE only works well above 80. (Since GPS data that I use is 74 Bytes, it's problem)
[TX Buffer]
[RX Buffer]
[Code] : I have changed QSPI_TEST_DATA_SIZE. line 69.
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/** @file
* @defgroup qspi_example_main main.c
* @{
* @ingroup qspi_example
*
* @brief QSPI Example Application main file.
*
* This file contains the source code for a sample application using QSPI.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "nrf_drv_qspi.h"
#include "nrf_delay.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "boards.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "sdk_config.h"
#define QSPI_STD_CMD_WRSR 0x01
#define QSPI_STD_CMD_RSTEN 0x66
#define QSPI_STD_CMD_RST 0x99
//#define QSPI_TEST_DATA_SIZE 256 /*< Nordic Original Code */
#define QSPI_TEST_DATA_SIZE 74 /*< Test Code */
#define WAIT_FOR_PERIPH() do { \
while (!m_finished) {} \
m_finished = false; \
} while (0)
static volatile bool m_finished = false;
static uint8_t m_buffer_tx[QSPI_TEST_DATA_SIZE];
static uint8_t m_buffer_rx[QSPI_TEST_DATA_SIZE];
static void qspi_handler(nrf_drv_qspi_evt_t event, void * p_context)
{
UNUSED_PARAMETER(event);
UNUSED_PARAMETER(p_context);
m_finished = true;
}
static void configure_memory()
{
uint8_t temporary = 0x40;
uint32_t err_code;
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
err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
APP_ERROR_CHECK(err_code);
// Send reset command
cinstr_cfg.opcode = QSPI_STD_CMD_RST;
err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
APP_ERROR_CHECK(err_code);
// Switch to qspi mode
cinstr_cfg.opcode = QSPI_STD_CMD_WRSR;
cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_2B;
err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, &temporary, NULL);
APP_ERROR_CHECK(err_code);
}
int main(void)
{
uint32_t i;
uint32_t err_code;
err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO(""
"QSPI write and read example using 24bit addressing mode");
srand(0);
for (i = 0; i < QSPI_TEST_DATA_SIZE; ++i)
{
m_buffer_tx[i] = (uint8_t)rand();
}
nrf_drv_qspi_config_t config = NRF_DRV_QSPI_DEFAULT_CONFIG;
err_code = nrf_drv_qspi_init(&config, qspi_handler, NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("QSPI example started.");
configure_memory();
m_finished = false;
err_code = nrf_drv_qspi_erase(NRF_QSPI_ERASE_LEN_64KB, 0);
APP_ERROR_CHECK(err_code);
WAIT_FOR_PERIPH();
NRF_LOG_INFO("Process of erasing first block start");
err_code = nrf_drv_qspi_write(m_buffer_tx, QSPI_TEST_DATA_SIZE, 0);
APP_ERROR_CHECK(err_code);
WAIT_FOR_PERIPH();
NRF_LOG_INFO("Process of writing data start");
err_code = nrf_drv_qspi_read(m_buffer_rx, QSPI_TEST_DATA_SIZE, 0);
WAIT_FOR_PERIPH();
NRF_LOG_INFO("Data read");
NRF_LOG_INFO("Compare...");
if (memcmp(m_buffer_tx, m_buffer_rx, QSPI_TEST_DATA_SIZE) == 0)
{
NRF_LOG_INFO("Data consistent");
}
else
{
NRF_LOG_INFO("Data inconsistent");
}
nrf_drv_qspi_uninit();
for (;;)
{
}
}
/** @} */
What causes the issues found above and how should they be addressed?
I current use:
- SDK 15
- Segger Embedded Studio 3.34
- Windows 10
- PCA10056
- embedded flash memory (MX25R6435F)
I look forward to your reply, Thank you 
