UART pin should not use AIN pin

RE: UART pin should not use AIN pin

vernon — Tue, 04 Sep 2018 08:39:28 GMT

Hi Martin,

Thank you very much for your answer, I follow the debug steps and trace the error code, it seems that the error code number is NRF_ERROR_DATA_SIZE(Invalid Data size), see the below shot, can you point out what's wrong with the data size in my code? and I attached the zip files which is used for uart1 application.

devzone.nordicsemi.com/.../app_5F00_uart1.zip

#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */



static void uart1_init(void)
{
uint32_t err_code;
app_uart1_comm_params_t const comm_params =
{
.rx_pin_no = 5,//14,
.tx_pin_no = 6,//16,
.rts_pin_no = 255,
.cts_pin_no = 255,
.flow_control = APP_UART1_FLOW_CONTROL_DISABLED,
.use_parity = false,
#if defined (UART_PRESENT)
.baud_rate = NRF_UART_BAUDRATE_115200
#else
.baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
};

APP_UART1_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart1_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
}

#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */

static void uart_init(void)
{
uint32_t err_code;
app_uart_comm_params_t const comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
#if defined (UART_PRESENT)
.baud_rate = NRF_UART_BAUDRATE_115200
#else
.baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
};

APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
}

int main(void)
{
bool erase_bonds;

// Initialize.
uart_init();
uart1_init();
log_init();
timers_init();
buttons_leds_init(&erase_bonds);

}

RE: UART pin should not use AIN pin

Martin Lesund — Thu, 30 Aug 2018 13:34:23 GMT

Hi Vernon,

Could you try to debug the application, and see what information the app_error_fault_handler gives out.

Debugging in Segger IDE.

Are you running this on the nrf52840 DK?

Which SDK version are you using?

RE: UART pin should not use AIN pin

vernon — Thu, 30 Aug 2018 10:11:48 GMT

Hi Martin,

I have tried to use the low-frequency-IO as the UART PIN, when configuring all of these IO, the program also ran into the __WEAK void app_error_fault_handler(uint32_t id, uint32_t pc, uint32_t info), P0.00 and P0.01 also does.

RE: UART pin should not use AIN pin

Martin Lesund — Thu, 30 Aug 2018 09:25:20 GMT

Hi Vernon,

Please keep in mind nrf52840 has only 1 UART so as a second peripheral you can use UARTE.

See this thread for more information.

(could also be interesting)

RE: UART pin should not use AIN pin

vernon — Thu, 30 Aug 2018 02:53:30 GMT

Hi Martin,

Thank you very much for the reply, it seems that it is OK when RX connect to P0.06 and TX connect to P0.05, but it will run into __WEAK void app_error_fault_handler(uint32_t id, uint32_t pc, uint32_t info) when RX connect to P0.05 and TX connect to P0.06. and for your information, I am trying to use uart0 and uart1 at the same time and caused that problem.

int main(void)
{
bool erase_bonds;

bg96_at_app_init();

// Initialize.
uart_init();
uart1_init();
log_init();
timers_init();
buttons_leds_init(&erase_bonds);

.....

}

Best Regards,

Vernon

RE: UART pin should not use AIN pin

Martin Lesund — Wed, 29 Aug 2018 13:23:04 GMT

Hi Vernon,

Are you sure that you are not using the p0.05 pin for anything else?

How is your defines set in BOARD_PCA10056.h ?

Are you able to get out some more information through debugging?

Best Regards,

Martin L.