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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Linaro Limited
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <unistd.h>
#include "py/mpconfig.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "src/zephyr_getchar.h"
// Zephyr headers
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/console/console.h>
#include <zephyr/console/tty.h>
#include <zephyr/drivers/uart.h>
#ifdef CONFIG_CONSOLE_SUBSYS
static int mp_console_putchar(char c);
static int mp_console_getchar(void);
static struct tty_serial mp_console_serial;
static uint8_t mp_console_rxbuf[CONFIG_CONSOLE_GETCHAR_BUFSIZE];
static uint8_t mp_console_txbuf[CONFIG_CONSOLE_PUTCHAR_BUFSIZE];
#endif // CONFIG_CONSOLE_SUBSYS
/*
* Core UART functions to implement for a port
*/
uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
uintptr_t ret = 0;
if (poll_flags & MP_STREAM_POLL_RD) {
#ifdef CONFIG_CONSOLE_SUBSYS
// It's not easy to test if tty is readable, so just unconditionally set it for now.
ret |= MP_STREAM_POLL_RD;
#else
if (zephyr_getchar_check()) {
ret |= MP_STREAM_POLL_RD;
}
#endif
}
if (poll_flags & MP_STREAM_POLL_WR) {
ret |= MP_STREAM_POLL_WR;
}
return ret;
}
// Receive single character
int mp_hal_stdin_rx_chr(void) {
for (;;) {
int _chr;
#ifdef CONFIG_CONSOLE_SUBSYS
_chr = mp_console_getchar();
#else
_chr = zephyr_getchar();
#endif
if (_chr >= 0) {
return _chr;
}
MICROPY_EVENT_POLL_HOOK
}
}
// Send string of given length
mp_uint_t mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
mp_uint_t ret = len;
#ifdef CONFIG_CONSOLE_SUBSYS
while (len--) {
char c = *str++;
while (mp_console_putchar(c) == -1) {
MICROPY_EVENT_POLL_HOOK
}
}
#else
static const struct device *uart_console_dev =
DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
while (len--) {
uart_poll_out(uart_console_dev, *str++);
}
#endif
return ret;
}
#ifdef CONFIG_CONSOLE_SUBSYS
int mp_console_init(void) {
const struct device *uart_dev;
int ret;
uart_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
if (!device_is_ready(uart_dev)) {
return -ENODEV;
}
ret = tty_init(&mp_console_serial, uart_dev);
if (ret) {
return ret;
}
/* Checks device driver supports for interrupt driven data transfers. */
if (CONFIG_CONSOLE_GETCHAR_BUFSIZE + CONFIG_CONSOLE_PUTCHAR_BUFSIZE) {
const struct uart_driver_api *api =
(const struct uart_driver_api *)uart_dev->api;
if (!api->irq_callback_set) {
return -ENOTSUP;
}
}
tty_set_tx_buf(&mp_console_serial, mp_console_txbuf, sizeof(mp_console_txbuf));
tty_set_rx_buf(&mp_console_serial, mp_console_rxbuf, sizeof(mp_console_rxbuf));
tty_set_rx_timeout(&mp_console_serial, 0);
tty_set_tx_timeout(&mp_console_serial, 1);
return 0;
}
static int mp_console_putchar(char c) {
return tty_write(&mp_console_serial, &c, 1);
}
static int mp_console_getchar(void) {
uint8_t c;
int res;
res = tty_read(&mp_console_serial, &c, 1);
if (res < 0) {
return res;
}
return c;
}
#endif // CONFIG_CONSOLE_SUBSYS
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