Hi,
i am trying to interface an external spi flash memory with nrf52832 to store temp. data.
i tried to read the manufacture/device id but i am getting wrong data.
my code is as follows:
void at_read_rems(uint8_t * manufacturer_id, uint8_t * device_id)
{
uint8_t spi_tx_cmd[] = {0x90,0x00,0x00,0x00};
uint8_t spi_rx_response[6];
nrf_gpio_pin_clear(SPI_SS_PIN);
nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), spi_rx_response, sizeof(spi_rx_response));
/*
nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), NULL, NULL);
nrf_gpio_pin_set(SPI_SS_PIN);
nrf_gpio_pin_clear(SPI_SS_PIN);
nrf_drv_spi_transfer(&spi, NULL, NULL, spi_rx_response, sizeof(spi_rx_response));
*/
nrf_gpio_pin_set(SPI_SS_PIN);
*manufacturer_id = spi_rx_response[4];
*device_id = spi_rx_response[5];
}
void spi_config(void)
{
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.mode = NRF_DRV_SPI_MODE_0; //NRF_DRV_SPI_MODE_0 NRF_DRV_SPI_MODE_3
spi_config.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST; //NRF_DRV_SPI_BIT_ORDER_MSB_FIRST
spi_config.frequency = NRF_DRV_SPI_FREQ_1M;
spi_config.ss_pin = NRF_DRV_SPI_PIN_NOT_USED;
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, NULL, NULL));
//NRF_LOG_INFO("SPI example started.");
nrf_gpio_cfg_output(SPI_SS_PIN);
nrf_gpio_pin_set(SPI_SS_PIN);
}
int main(void)
{
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
spi_config();
uint8_t man_id, dev_id;
at_read_rems(&man_id, &dev_id);
nrf_delay_ms(200);
}
as per the datasheet man. id/ device id should be EFh/14h respectively but i am getting FCh/1Fh
thanks
