nRF9160 DK send/receive data from UART1

[Hoang]

Dear, 

I am using nRF9160 DK, 

I can re-define pin for UART0 and UART1, from UART0, i can receive data from UART0/UART1. 

#include <zephyr.h>
#include <misc/printk.h>
#include <uart.h>

static u8_t uart_buf[1024];

void uart_cb(struct device *x)
{
	uart_irq_update(x);
	int data_length = 0;

	if (uart_irq_rx_ready(x)) {
		data_length = uart_fifo_read(x, uart_buf, sizeof(uart_buf));
		uart_buf[data_length] = 0;
	}
	printk("%s", uart_buf);
}

void main(void)
{
	struct device *uart0 = device_get_binding("UART_0");
        struct device *uart1 = device_get_binding("UART_1");

	uart_irq_callback_set(uart0, uart_cb);
	uart_irq_rx_enable(uart0);
    uart_irq_callback_set(uart1, uart_cb);
	uart_irq_rx_enable(uart1);
	printk("UART loopback start!\n");
	while (1) {
		k_cpu_idle();
                
	}
}

Now, I want to send data to UART1.

Plz help me

Regards,

Thanks

[Hoang]

Hi 

I just tried:

void uart_sendCOM(struct device *x,  u8_t *Cont)
{
	       
         u16_t len = strlen(Cont); 
         uart_fifo_fill(x, Cont,len );
         uart_irq_tx_enable(x);
         
    
}
void uart_cb(struct device *x)
{
	uart_irq_update(x);
	int data_length = 0;

	if (uart_irq_rx_ready(x)) {
                data_length = uart_fifo_read(x, uart_buf, sizeof(uart_buf));
		uart_buf[data_length] = 0;
	}
	printk("%s", uart_buf);

       	if (uart_irq_tx_ready(x)) {
               
        	struct uart_data_t *buf =
			k_fifo_get(&fifo_uart_tx_data, K_NO_WAIT);
		u16_t written = 0;

		/* Nothing in the FIFO, nothing to send */
		if (!buf) {
			uart_irq_tx_disable(x);
			return;
		}

		while (buf->len > written) {
			written += uart_fifo_fill(x,
						  &buf->data[written],
						  buf->len - written);
		}

		while (!uart_irq_tx_complete(x)) {
			/* Wait for the last byte to get
			 * shifted out of the module
			 */
		}

		if (k_fifo_is_empty(&fifo_uart_tx_data)) {
			uart_irq_tx_disable(x);
		}

		k_free(buf);
	
		
	}

       
}

void main(void)
{
	
        struct device *uart1 = device_get_binding("UART_1");
       
        uart_irq_rx_enable(uart1);
        uart_irq_callback_set(uart1, uart_cb);
        uart_sendCOM(uart1, "Hello the world!");
        k_sleep(3000);
        
}
        

Hope it is correct!

Thanks

Regards, 

[MosheSmartAmr]

HI hoang,
I'm practically trying to do the same thing.

I did not understand what is this fifo fifo_uart_tx_data,

did you create it ? (trying this code i get fifo_uart_tx_data undeclared error)

[Hoang]

Hi Moshe, 

Sorry, I didnt add the library in my code, 

You need to add:

#include <zephyr.h>
#include <misc/printk.h>
#include <uart.h>

the function fifo_uart_tx_data is defined in uart.h lib

Goodluck 

[Adeel]

Hi,

Anyone to reply on this thread as its useful for me. In line 24 of the above code, I get error on: &fifo_uart_tx_data as undeclared. I could not find it in the drivers/uart.h library of uart. 

Any way to fix this error ?

Regards,

Adeel.