Hello, I'm trying to setup simple UART reception (interrupt driven) with Zephyr OS.
When a message over UART, only some characters are received, others just skipped.
Here is my code:
#include <zephyr.h>
// #include <zephyr/types.h>
// #include <arch/cpu.h>
#include <string.h>
#include <sys/printk.h>
// #include <sys/util.h>
#include <drivers/uart.h>
static const struct device *uart1_dev;
typedef struct uart_data
{
char * tx_data;
char * rx_data;
uint8_t tx_len;
uint8_t rx_len;
uint8_t rx_count;
}uart_data;
static void uart_cb(const struct device *uart_device, void *user_data)
{
uart_data * uart1_data = (uart_data *)user_data;
static int sent_len = 10;
/* Verify uart_irq_update() */
if (!uart_irq_update(uart_device)) {
printk("retval should always be 1\r\n");
return;
}
if (uart_irq_tx_ready(uart_device))
{
if(uart1_data->tx_len)
{
sent_len = uart_fifo_fill(uart_device, uart1_data->tx_data, (sent_len < uart1_data->tx_len) ? sent_len : uart1_data->tx_len);
uart1_data->tx_len -= sent_len;
uart1_data->tx_data += sent_len;
printk("Sending data to UART1 with len %d\r\n", sent_len);
}
else
{
uart_irq_tx_disable(uart1_dev);
}
}
/* get all of the data off UART as fast as we can */
if(uart_irq_rx_ready(uart_device))
{
uint8_t c;
uart_fifo_read(uart_device, &c, 1);
uart1_data->rx_count--;
*uart1_data->rx_data++ = c;
uart_irq_rx_enable(uart1_dev);
printk("Letter %c\r\n", *(uart1_data->rx_data - 1));
if((c == '\r') || (uart1_data->rx_count == 0))
{
uart_irq_rx_disable(uart1_dev);
uart1_data->rx_data -= (uart1_data->rx_len - uart1_data->rx_count);
printk("Rcvd msg: %s\r\n", uart1_data->rx_data);
k_msleep(10);
memset(uart1_data->rx_data, 0, uart1_data->rx_len);
uart1_data->rx_count = uart1_data->rx_len;
uart_irq_rx_enable(uart1_dev);
}
}
}
void main(void)
{
char test[21] = "Tx ISR working test\r\n";
char test_rcv[40] = {0};
uart1_dev = device_get_binding("UART_1");
printk("Device ready %d\r\n", device_is_ready(uart1_dev));
uart_data uart1_data = {test, test_rcv, 20, 40, 40};
uart_irq_callback_user_data_set(uart1_dev, uart_cb, &uart1_data);
uart_irq_tx_enable(uart1_dev);
uart_irq_rx_enable(uart1_dev);
while(1)
{
// printk("Console alive\r\n");
k_msleep(2000);
}
}
Proj.conf file:
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
Result output:
Did anyone had similar issue?
