Hi everyone,
I am trying the following project to work with my SPI peripheral device( EM4325): nRF5_SDK_11.0.0_89a8197\examples\peripheral\spi\pca10040\arm5_no_packs
Info of the SPI peripheral is here : www.emmicroelectronic.com/.../4325-ds_0.pdf
I am using the following connections to connect the nRF52832 and EM4325:
P0.29 (CS) to Pin 6 (P3_CS)
P0.03 (SCLK) to Pin 5 (P2_SCLK)
P0.04 (MOSI) to pin 4 (P0_MOSI)
P0.28 (MISO) to pin 3 (P1_MISO)
VDD to pin 7 (VBAT)
GND to pin 8 (VSS)
I have defined the same pins in the nrf_drv_config.h
#define SPI0_ENABLED 1
#if (SPI0_ENABLED == 1)
#define SPI0_USE_EASY_DMA 1
#define SPI0_CONFIG_SCK_PIN 3
#define SPI0_CONFIG_MOSI_PIN 4
#define SPI0_CONFIG_MISO_PIN 28
#define SPI0_CONFIG_IRQ_PRIORITY APP_IRQ_PRIORITY_LOW
This is the code which i am using :
#define TEST_STRING "Nordic"
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. */
void spi_event_handler(nrf_drv_spi_evt_t const * p_event)
{
spi_xfer_done = true;
NRF_LOG_PRINTF(" Transfer completed.\r\n");
if (m_rx_buf[0] != 0)
{
NRF_LOG_PRINTF(" Received: %s\r\n",m_rx_buf);
}
}
int main(void)
{
APP_ERROR_CHECK(NRF_LOG_INIT());
NRF_LOG_PRINTF("SPI example\r\n");
nrf_drv_spi_config_t spi_config;
spi_config.ss_pin = SPI_CS_PIN;
spi_config.mosi_pin = SPI0_CONFIG_MOSI_PIN;
spi_config.sck_pin = SPI0_CONFIG_SCK_PIN;
spi_config.miso_pin = SPI0_CONFIG_MISO_PIN;
spi_config.frequency = NRF_DRV_SPI_FREQ_125K;
spi_config.mode = NRF_DRV_SPI_MODE_0;
spi_config.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST; // Matches Default.
spi_config.ss_pin = SPI_CS_PIN;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler));
while(1)
{
// Reset rx buffer and transfer done flag
memset(m_rx_buf, 0, m_length);
spi_xfer_done = false;
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));
while (!spi_xfer_done)
{
__WFE();
}
LEDS_INVERT(BSP_LED_0_MASK);
nrf_delay_ms(200);
}
}
I am not receive the transmitted packet in my receiver buffer that is m_rx_buf. I have done it for all the frequency and clock modes which are available and with EasyDMA enable and disable.
What might be the issue any suggestions will be helpfull .
This is my project file spi (3).zip
Thank you.
