1 /*
2 * Copyright (c) 2020 Intel Corporation.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/drivers/uart.h>
9 #include <zephyr/sys/__assert.h>
10
11 static const struct device *uart_dev;
12
z_gdb_backend_init(void)13 int z_gdb_backend_init(void)
14 {
15 int ret = 0;
16 static const struct uart_config uart_cfg = {
17 .baudrate = 115200,
18 .parity = UART_CFG_PARITY_NONE,
19 .stop_bits = UART_CFG_STOP_BITS_1,
20 .data_bits = UART_CFG_DATA_BITS_8,
21 .flow_ctrl = UART_CFG_FLOW_CTRL_NONE
22 };
23
24 #ifdef CONFIG_GDBSTUB_TRACE
25 printk("gdbstub_serial:%s enter\n", __func__);
26 #endif
27
28 if (uart_dev == NULL) {
29 uart_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_gdbstub_uart));
30
31 __ASSERT(device_is_ready(uart_dev), "uart device is not ready");
32
33 ret = uart_configure(uart_dev, &uart_cfg);
34 __ASSERT(ret == 0, "Could not configure uart device");
35 }
36
37 #ifdef CONFIG_GDBSTUB_TRACE
38 printk("gdbstub_serial:%s exit\n", __func__);
39 #endif
40 return ret;
41 }
42
z_gdb_putchar(unsigned char ch)43 void z_gdb_putchar(unsigned char ch)
44 {
45 uart_poll_out(uart_dev, ch);
46 }
47
z_gdb_getchar(void)48 unsigned char z_gdb_getchar(void)
49 {
50 unsigned char ch;
51
52 while (uart_poll_in(uart_dev, &ch) < 0) {
53 }
54
55 return ch;
56 }
57
