Included uart, test commit

main.c

@@ -1,5 +1,6 @@
 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
+#include <zephyr/drivers/uart.h>
 
 #include <nrf_gpio.h>
 #include <nrf_timer.h>
@@ -7,6 +8,41 @@
 #define TST_CLK_PIN 17 //this is led 0 pin on nrf52-dk
 #define FREQ_MEASURE_PIN 11
 
+const struct device *uart0 = DEVICE_DT_GET(DT_NODELABEL(uart0));
+
+
+struct uart_config uart_cfg = {
+	.baudrate = 9600,
+	.parity = UART_CFG_PARITY_NONE,
+	.stop_bits = UART_CFG_STOP_BITS_1,
+	.flow_ctrl = UART_CFG_FLOW_CTRL_NONE,
+	.data_bits = UART_CFG_DATA_BITS_8,
+};
+
+void send_str(const struct device *uart, char *str)
+{
+	int msg_len = strlen(str);
+
+	for (int i = 0; i < msg_len; i++) {
+		uart_poll_out(uart, str[i]);
+	}
+
+	printk("Device %s sent: \"%s\"\n", uart->name, str);
+}
+
+void recv_str(const struct device *uart, char *str)
+{
+	char *head = str;
+	char c;
+
+	while (!uart_poll_in(uart, &c)) {
+		*head++ = c;
+	}
+	*head = '\0';
+
+	printk("Device %s received: \"%s\"\n", uart->name, str);
+}
+
 void gpio_clock_8m(uint32_t pin_number)
 {
     
@@ -111,6 +147,18 @@ void TIMER1_IRQHandler(void)
 
 int main(void)
 {
+	char send_buf[64];
+
+	printk("Hellowold 1!");
+	/*rc = uart_configure(uart0, &uart_cfg);
+	if (rc) {
+		printk("Could not configure device %s", uart0->name);
+	}*/
+
+	snprintf(send_buf, 64, "Helloworld 2");
+	send_str(uart0, send_buf);
+
+
 	NVIC_EnableIRQ(TIMER1_IRQn); //enable timer1 interrupt
 	IRQ_DIRECT_CONNECT(TIMER1_IRQn, 3, TIMER1_IRQHandler, 0); //link interrupt flag to handler
     NVIC_SetPriority(TIMER1_IRQn, 3); //set interrupt execution priority

prj.conf

@@ -1,2 +1,6 @@
 CONFIG_NRFX_TIMER0=y
 CONFIG_NRFX_TIMER1=y
+
+CONFIG_SERIAL=y
+CONFIG_UART_USE_RUNTIME_CONFIGURE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y