UART connect external MCU(STM32) transmit and recieved data

[yithwe]

Hi 

    I need to send data from nRF7002 to external CPU(STM32) use UART protocol, for HW nRF7002 P0.20 connect STM32 RX and RF7002 P0.22 connect STM32 TX, I try to use exercise to modify send 8 bytes data and recieved from STM32 8 bytes data, there is no any data recieved data from STM32 and nRF7002, isn't I miss some config for this flow?below is my device three overlay and code, please give suggestion for this, Thanks.

&uart0_default {
	group1 {
		psels = <NRF_PSEL(UART_TX, 0, 20)>, <NRF_PSEL(UART_RTS, 0, 19)>;
	};
};

&uart0_sleep {
	group1 {
		psels = <NRF_PSEL(UART_TX, 0, 20)>,
				<NRF_PSEL(UART_RX, 0, 22)>,
				<NRF_PSEL(UART_RTS, 0, 19)>,
				<NRF_PSEL(UART_CTS, 0, 21)>;
	};
};
&uart0 {
	status = "okay";
	current-speed = <115200>;
	pinctrl-0 = <&uart0_default>;
	pinctrl-1 = <&uart0_sleep>;
	pinctrl-names = "default", "sleep";
};

#define RECEIVE_BUFF_SIZE 8
const struct device *uart= DEVICE_DT_GET(DT_NODELABEL(uart0));
static uint8_t tx_buf[] =   {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07};
static uint8_t rx_buf[RECEIVE_BUFF_SIZE] = {0};
int main(void)
{
	int ret;
		if (!device_is_ready(uart)){
		printk("UART device not ready\r\n");
		return 1 ;
	}
	ret = uart_tx(uart, tx_buf, sizeof(tx_buf), SYS_FOREVER_MS);
	if (ret) {
		return 1;
	}
		ret = uart_rx_enable(uart ,rx_buf,sizeof rx_buf,RECEIVE_TIMEOUT);
	if (ret) {
		return 1;
	}
	while (1) {
		k_msleep(SLEEP_TIME_MS);
	}
}

Best Regards

    Tina

          

[Naeem Maroof]

Hi TIna,

yithwe said:

I try to send 0x41, but it convert to ASCII code

The purpose was to test that the uart functionality is working.

Do you confirm that when you send 0x41, you are able to receive the character A?

If that is the case then uart functionality is working, it is only the encoding decoding that shows character for 0x41 but not for 0x01.

For example, you can see below that the number 0x41 can be seen as character A but 0x01 can not be displayed.

[yithwe]

Hi Naeem Maroof

            Do you confirm that when you send 0x41, you are able to receive the character A?

yes, it's work.

it is only the encoding decoding that shows character for 0x41 but not for 0x01.

we need to recieve real 0x41, not for character, do you have any suggestion for this issue or any API we can use?Thanks.

Best Regards

     Tina

[Naeem Maroof]

It is the terminal that is displaying it like this.

Can you change setting to receive HEX:

(As in the lower right corner)

[yithwe]

Hi Naeem Maroof

                            it's work on  this terminal as I want to transmit, Thanks.

Best Regards

      Tina