I'm trying to communicate with HTS221 sensor and read WHO_IM_I but then I always get error 17 on nrf_drv_twi_rx and receive 0 on output
Twi init
ret_code_t ret;
const nrf_drv_twi_config_t config =
{
.scl = TWI_SCL_M,
.sda = TWI_SDA_M,
.frequency = NRF_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH
};
do
{
ret = nrf_drv_twi_init(&m_twi_master, &config, twi_handler, NULL);
SEGGER_RTT_printf(0, " return value of twi_init %d\n", ret);
if (NRF_SUCCESS != ret)
{
break;
}
nrf_drv_twi_enable(&m_twi_master);
} while (0);
the below code is executed on a timer handler every 1 second
#define WHO_AM_I 0x0F
#define HTS221 0x5F
data_I2C[0] = WHO_AM_I;
err_code = nrf_drv_twi_tx(&m_twi_master, HTS221, data_I2C, 1, true);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_twi_rx(&m_twi_master, HTS221, check_I2C,1);
APP_ERROR_CHECK(err_code);
SEGGER_RTT_printf(0," data: %d %d \n",check_I2C[0],err_code);
output :
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
switch(p_event->type)
{
case NRF_DRV_TWI_EVT_DONE:
// If EVT_DONE (event done) is received a device is found and responding on that particular address
SEGGER_RTT_printf(0,"\r\n!****************************!\r\nDevice found at 7-bit address: %#x!\r\n!****************************!\r\n\r\n", 0);
device_found = true;
break;
case NRF_DRV_TWI_EVT_ADDRESS_NACK:
SEGGER_RTT_printf(0,"No address ACK on address: %#x!\r\n", 0);
break;
case NRF_DRV_TWI_EVT_DATA_NACK:
SEGGER_RTT_printf(0,"No data ACK on address: %#x!\r\n", 0);
break;
default:
break;
}
