Hello ,
I am interfacing the nRF52832 with winband spi flash . I can able to read the device manufacture id but i couldn't able to read the data from the device . I am getting ff always .
Here is my code please suggest me.
I checked with digital oscilloscope i am getting the clk signal
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* software without specific prior written permission.
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* 4. This software, with or without modification, must only be used with a
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*/
#include "nrf_drv_spi.h"
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define SPI_INSTANCE 0 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
static volatile bool spi_xfer_done; /**< Flag used to indicate that SPI instance completed the transfer. */
#define TEST_STRING "Nordi"
static uint8_t m_tx_buf[] = TEST_STRING; /**< TX buffer. */
static uint8_t m_rx_buf[sizeof(TEST_STRING) + 1]; /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
/**
* @brief SPI user event handler.
* @param event
*/
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
spi_xfer_done = true;
NRF_LOG_INFO("Transfer completed.");
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
}
// Manufacture id of the device
static void manufacture_id()
{
m_tx_buf[0]= 0X90; // (0-7) (8-15)=dummy ( 16-23)=dummy ( 24-31)=dummy receive the data in bytes 5 , 6
m_tx_buf[1]= 0x01;
nrf_drv_spi_transfer(&spi, m_tx_buf[0],4, m_rx_buf, 6);
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
//nrf_drv_spi_transfer(&spi, m_tx_buf[0]+m_tx_buf[1],4, m_rx_buf, 6);
}
static void jedec_id()
{
m_tx_buf[0]=0X9F; // (0-7) // RECEIVE THE BYTES IN( 8-15)( 16-23)( 24-31)
nrf_drv_spi_transfer(&spi, m_tx_buf[0],1, m_rx_buf, 3);
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
//nrf_drv_spi_transfer(&spi, m_tx_buf[0]+m_tx_buf[1],4, m_rx_buf, 6);
}
static void write_enable()
{
m_tx_buf[0]=0x06; // (0-7) // RECEIVE THE BYTES IN( 8-15)( 16-23)( 24-31)
nrf_drv_spi_transfer(&spi, m_tx_buf[0],1, m_rx_buf, 0);
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
//nrf_drv_spi_transfer(&spi, m_tx_buf[0]+m_tx_buf[1],4, m_rx_buf, 6);
}
static void write_data()
{
m_tx_buf[0]="nord";
m_tx_buf[1]=0x00;
m_tx_buf[2]=0x00;
m_tx_buf[3]=0x00;
// (0-7) // RECEIVE THE BYTES IN( 8-15)( 16-23)( 24-31)
nrf_drv_spi_transfer(&spi,m_tx_buf[0]+m_tx_buf[1]+m_tx_buf[2]+m_tx_buf[3],4, m_rx_buf, 0);
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
//nrf_drv_spi_transfer(&spi, m_tx_buf[0]+m_tx_buf[1],4, m_rx_buf, 6);
}
static void read_data()
{
m_tx_buf[0]= 0x03;
m_tx_buf[1]=0x00;
m_tx_buf[2]=0x00;
m_tx_buf[3]=0x00;
// (0-7) // RECEIVE THE BYTES IN( 8-15)( 16-23)( 24-31)
nrf_drv_spi_transfer(&spi,m_tx_buf[0]+m_tx_buf[1]+m_tx_buf[2]+m_tx_buf[3],4, m_rx_buf, 3);
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
//nrf_drv_spi_transfer(&spi, m_tx_buf[0]+m_tx_buf[1],4, m_rx_buf, 6);
}
int main(void)
{
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = SPI_SS_PIN;
spi_config.miso_pin = SPI_MISO_PIN;
spi_config.mosi_pin = SPI_MOSI_PIN;
spi_config.sck_pin = SPI_SCK_PIN;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
NRF_LOG_INFO("SPI example started.");
while (1)
{
// Reset rx buffer and transfer done flag
memset(m_rx_buf, 0, m_length);
spi_xfer_done = false;
manufacture_id();
//jedec_id();
write_enable();
write_data();
read_data();
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));
while (!spi_xfer_done)
{
__WFE();
}
NRF_LOG_FLUSH();
bsp_board_led_invert(BSP_BOARD_LED_0);
nrf_delay_ms(200);
}
}
