Hello,
at the moment I am trying to get the NRF9160 Icarus Board to communicate with an ESP8266 Board within serial modem mode. I just need to send some AT commands through UART but I don't get any answer from the ESP8266. The communication with the ESP8266 works fine, if I attache it to my PC and using Putty. I can only get the first message printed out through the Icarus Board, if I reset the ESP8266 at the right time. I am using the exact same configuration (data, stop, parity bit) as Putty and I am always sending the carriage return and line feed at the end of my messages but the ESP still won't answer. Can you please have a look on my code so far?
//actinius_icarus_common.dts
&uart1 {
status = "okay";
current-speed = <115200>;
tx-pin = <24>;
rx-pin = <23>;
label = "mainuart";
};//prj.conf CONFIG_UART_INTERRUPT_DRIVEN=y CONFIG_UART_ASYNC_API=y CONFIG_TRUSTED_EXECUTION_NONSECURE=y CONFIG_UART_INTERRUPT_DRIVEN=y CONFIG_MAIN_STACK_SIZE=4096 CONFIG_BSD_LIBRARY_TRACE_ENABLED=n
//main.c
#include <zephyr.h>
#include <sys/printk.h>
#include <drivers/uart.h>
#include <string.h>
static K_FIFO_DEFINE(fifo_uart_tx_data);
static K_FIFO_DEFINE(fifo_uart_rx_data);
static uint8_t uart_buf[1024];
struct uart_data_t {
void *fifo_reserved;
uint8_t data[1024];
uint16_t len;
};
const struct uart_config uart_cfg = {
.baudrate = 115200,
.parity = UART_CFG_PARITY_NONE,
.stop_bits = UART_CFG_STOP_BITS_1,
.data_bits = UART_CFG_DATA_BITS_8,
.flow_ctrl = UART_CFG_FLOW_CTRL_NONE,
};
const struct device *uart_dev;
static void uart_irq_handler(const struct device *x, void *context)
{
uint8_t buf[] = {1, 2, 3, 4, 5};
if (uart_irq_tx_ready(x)) {
(void)uart_fifo_fill(x, buf, sizeof(buf));
uart_irq_tx_disable(x);
}
if (uart_irq_rx_ready(x)) {
uint8_t buf[10];
int len = uart_fifo_read(x, buf, sizeof(buf));
printk("Received data is:%s\r\n", buf);
if (buf == '\r') {
printk("carriage Return");
}
if (buf == '\n') {
printk("LineFeed");
}
if (len) {
printk("read %d bytes\n", len);
}
}
}
void uart_sendCOM(const struct device *x, uint8_t *Cont)
{
uint16_t len = strlen(Cont);
uart_fifo_fill(x, Cont,len );
uart_irq_tx_enable(x);
}
void main(void)
{
uart_dev = device_get_binding("mainuart");
if (!uart_dev) {
printk("error\r\n");
}
bool ret;
ret = uart_configure(uart_dev, &uart_cfg);
if (ret != 0) {
printk("UART can not be configured!\n");
}
uart_irq_rx_disable(uart_dev);
uart_irq_tx_disable(uart_dev);
uart_irq_callback_set(uart_dev, uart_irq_handler); // Set UART interrupt callback
uart_irq_rx_enable(uart_dev);
uart_irq_tx_enable(uart_dev);
k_sleep(K_MSEC(100));
printk("UART loopback start!\n");
while (1) {
printk("SendingAT..... \n");
uart_sendCOM(uart_dev, "AT\r\n");
k_sleep(K_MSEC(5000));
}
}
