nrfx_err_t nrfx_uarte_init(nrfx_uarte_t const * p_instance,
nrfx_uarte_config_t const * p_config,
nrfx_uarte_event_handler_t event_handler)
{
NRFX_ASSERT(p_config);
uarte_control_block_t * p_cb = &m_cb[p_instance->drv_inst_idx];
nrfx_err_t err_code = NRFX_SUCCESS;
if (p_cb->state != NRFX_DRV_STATE_UNINITIALIZED)
{
err_code = NRFX_ERROR_INVALID_STATE;
NRFX_LOG_WARNING("Function: %s, error code: %s.",
__func__,
NRFX_LOG_ERROR_STRING_GET(err_code));
return err_code;
}
#if NRFX_CHECK(NRFX_PRS_ENABLED)
static nrfx_irq_handler_t const irq_handlers[NRFX_UARTE_ENABLED_COUNT] = {
#if NRFX_CHECK(NRFX_UARTE0_ENABLED)
nrfx_uarte_0_irq_handler,
#endif
#if NRFX_CHECK(NRFX_UARTE1_ENABLED)
nrfx_uarte_1_irq_handler,
#endif
};
if (nrfx_prs_acquire(p_instance->p_reg,
irq_handlers[p_instance->drv_inst_idx]) != NRFX_SUCCESS)
{
err_code = NRFX_ERROR_BUSY;
NRFX_LOG_WARNING("Function: %s, error code: %s.",
__func__,
NRFX_LOG_ERROR_STRING_GET(err_code));
return err_code;
}
#endif // NRFX_CHECK(NRFX_PRS_ENABLED)
apply_config(p_instance, p_config);
p_cb->handler = event_handler;
p_cb->p_context = p_config->p_context;
if (p_cb->handler)
{
interrupts_enable(p_instance, p_config->interrupt_priority);
}
nrf_uarte_enable(p_instance->p_reg);
p_cb->rx_buffer_length = 0;
p_cb->rx_secondary_buffer_length = 0;
p_cb->tx_buffer_length = 0;
p_cb->state = NRFX_DRV_STATE_INITIALIZED;
NRFX_LOG_WARNING("Function: %s, error code: %s.",
__func__,
NRFX_LOG_ERROR_STRING_GET(err_code));
return err_code;
}
static int uarte_instance_init(struct device *dev,
const struct uarte_init_config *config,
u8_t interrupts_active)
{
int err;
NRF_UARTE_Type *uarte = get_uarte_instance(dev);
struct uarte_nrfx_data *data = get_dev_data(dev);
nrf_gpio_pin_write(config->pseltxd, 1);
nrf_gpio_cfg_output(config->pseltxd);
nrf_gpio_cfg_input(config->pselrxd, NRF_GPIO_PIN_NOPULL);
nrf_uarte_txrx_pins_set(uarte,
config->pseltxd,
config->pselrxd);
if (config->hwfc == NRF_UARTE_HWFC_ENABLED) {
nrf_gpio_pin_write(config->pselrts, 1);
nrf_gpio_cfg_output(config->pselrts);
nrf_gpio_cfg_input(config->pselcts, NRF_GPIO_PIN_NOPULL);
nrf_uarte_hwfc_pins_set(uarte,
config->pselrts,
config->pselcts);
}
/* Configure flow control and parity checking */
nrf_uarte_configure(uarte,
config->parity,
config->hwfc);
err = baudrate_set(dev, config->baudrate);
if (err) {
return err;
}
/* Enable receiver and transmitter */
nrf_uarte_enable(uarte);
nrf_uarte_event_clear(uarte, NRF_UARTE_EVENT_ENDRX);
nrf_uarte_rx_buffer_set(uarte, &data->rx_data, 1);
nrf_uarte_task_trigger(uarte, NRF_UARTE_TASK_STARTRX);
#if UARTE_INTERRUPT_DRIVEN
if (interrupts_active) {
/* Set ENDTX event by requesting fake (zero-length) transfer.
* Pointer to RAM variable (data->tx_buffer) is set because
* otherwise such operation may result in HardFault or RAM
* corruption.
*/
nrf_uarte_tx_buffer_set(uarte, data->tx_buffer, 0);
nrf_uarte_task_trigger(uarte, NRF_UARTE_TASK_STARTTX);
/* switch off transmitter to save an energy */
nrf_uarte_task_trigger(uarte, NRF_UARTE_TASK_STOPTX);
}
#endif /* UARTE_INTERRUPT_DRIVEN */
return 0;
}