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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* Development of the code in this file was sponsored by Microbric Pty Ltd
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Damien P. George
*
* 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 <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "rom/uart.h"
#include "py/obj.h"
#include "py/mpstate.h"
#include "py/mphal.h"
#include "extmod/misc.h"
#include "lib/utils/pyexec.h"
STATIC uint8_t stdin_ringbuf_array[256];
ringbuf_t stdin_ringbuf = {stdin_ringbuf_array, sizeof(stdin_ringbuf_array)};
int mp_hal_stdin_rx_chr(void) {
for (;;) {
int c = ringbuf_get(&stdin_ringbuf);
if (c != -1) {
return c;
}
MICROPY_EVENT_POLL_HOOK
vTaskDelay(1);
}
}
void mp_hal_stdout_tx_str(const char *str) {
mp_hal_stdout_tx_strn(str, strlen(str));
}
void mp_hal_stdout_tx_strn(const char *str, uint32_t len) {
MP_THREAD_GIL_EXIT();
for (uint32_t i = 0; i < len; ++i) {
uart_tx_one_char(str[i]);
}
MP_THREAD_GIL_ENTER();
mp_uos_dupterm_tx_strn(str, len);
}
// Efficiently convert "\n" to "\r\n"
void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
const char *last = str;
while (len--) {
if (*str == '\n') {
if (str > last) {
mp_hal_stdout_tx_strn(last, str - last);
}
mp_hal_stdout_tx_strn("\r\n", 2);
++str;
last = str;
} else {
++str;
}
}
if (str > last) {
mp_hal_stdout_tx_strn(last, str - last);
}
}
uint32_t mp_hal_ticks_ms(void) {
return esp_timer_get_time() / 1000;
}
uint32_t mp_hal_ticks_us(void) {
return esp_timer_get_time();
}
void mp_hal_delay_ms(uint32_t ms) {
uint64_t us = ms * 1000;
uint64_t dt;
uint64_t t0 = esp_timer_get_time();
for (;;) {
uint64_t t1 = esp_timer_get_time();
dt = t1 - t0;
if (dt + portTICK_PERIOD_MS * 1000 >= us) {
// doing a vTaskDelay would take us beyond requested delay time
break;
}
MICROPY_EVENT_POLL_HOOK
vTaskDelay(1);
}
if (dt < us) {
// do the remaining delay accurately
mp_hal_delay_us(us - dt);
}
}
void mp_hal_delay_us(uint32_t us) {
// these constants are tested for a 240MHz clock
const uint32_t this_overhead = 5;
const uint32_t pend_overhead = 150;
// return if requested delay is less than calling overhead
if (us < this_overhead) {
return;
}
us -= this_overhead;
uint64_t t0 = esp_timer_get_time();
for (;;) {
uint64_t dt = esp_timer_get_time() - t0;
if (dt >= us) {
return;
}
if (dt + pend_overhead < us) {
// we have enough time to service pending events
// (don't use MICROPY_EVENT_POLL_HOOK because it also yields)
mp_handle_pending();
}
}
}
// this function could do with improvements (eg use ets_delay_us)
void mp_hal_delay_us_fast(uint32_t us) {
uint32_t delay = ets_get_cpu_frequency() / 19;
while (--us) {
for (volatile uint32_t i = delay; i; --i) {
}
}
}
/*
extern int mp_stream_errno;
int *__errno() {
return &mp_stream_errno;
}
*/
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