kopia lustrzana https://github.com/micropython/micropython
227 wiersze
7.3 KiB
C
227 wiersze
7.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Daniel Campora
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/******************************************************************************
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IMPORTS
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******************************************************************************/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include "py/mpstate.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "py/objstr.h"
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#include "inc/hw_types.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_nvic.h"
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#include "hw_memmap.h"
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#include "rom_map.h"
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#include "interrupt.h"
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#include "systick.h"
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#include "prcm.h"
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#include "pin.h"
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#include "mpexception.h"
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#include "telnet.h"
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#include "pybuart.h"
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#include "utils.h"
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#include "irq.h"
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#include "moduos.h"
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#ifdef USE_FREERTOS
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#include "FreeRTOS.h"
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#include "task.h"
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#include "semphr.h"
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#endif
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/******************************************************************************
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DECLARE PRIVATE FUNCTIONS
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******************************************************************************/
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#ifndef USE_FREERTOS
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static void hal_TickInit (void);
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#endif
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/******************************************************************************
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DECLARE LOCAL DATA
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******************************************************************************/
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static volatile uint32_t HAL_tickCount;
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/******************************************************************************
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DECLARE IMPORTED DATA
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******************************************************************************/
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extern void (* const g_pfnVectors[256])(void);
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/******************************************************************************
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DEFINE PUBLIC FUNCTIONS
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******************************************************************************/
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__attribute__ ((section (".boot")))
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void HAL_SystemInit (void) {
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MAP_IntVTableBaseSet((unsigned long)&g_pfnVectors[0]);
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// in the case of a release image, these steps are already performed by
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// the bootloader so we can skip it and gain some code space
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#ifdef DEBUG
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MAP_IntMasterEnable();
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PRCMCC3200MCUInit();
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#endif
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#ifndef USE_FREERTOS
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hal_TickInit();
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#endif
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}
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void HAL_SystemDeInit (void) {
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}
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void HAL_IncrementTick(void) {
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HAL_tickCount++;
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}
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mp_uint_t mp_hal_ticks_ms(void) {
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return HAL_tickCount;
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}
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// The SysTick timer counts down at HAL_FCPU_HZ, so we can use that knowledge
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// to grab a microsecond counter.
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mp_uint_t mp_hal_ticks_us(void) {
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mp_uint_t irq_state = disable_irq();
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uint32_t counter = SysTickValueGet();
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uint32_t milliseconds = mp_hal_ticks_ms();
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enable_irq(irq_state);
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uint32_t load = SysTickPeriodGet();
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counter = load - counter; // Convert from decrementing to incrementing
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return (milliseconds * 1000) + ((counter * 1000) / load);
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}
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void mp_hal_delay_ms(mp_uint_t delay) {
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// only if we are not within interrupt context and interrupts are enabled
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if ((HAL_NVIC_INT_CTRL_REG & HAL_VECTACTIVE_MASK) == 0 && query_irq() == IRQ_STATE_ENABLED) {
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MP_THREAD_GIL_EXIT();
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#ifdef USE_FREERTOS
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vTaskDelay (delay / portTICK_PERIOD_MS);
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#else
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uint32_t start = HAL_tickCount;
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// wraparound of tick is taken care of by 2's complement arithmetic.
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while (HAL_tickCount - start < delay) {
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// enter sleep mode, waiting for (at least) the SysTick interrupt.
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__WFI();
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}
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#endif
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MP_THREAD_GIL_ENTER();
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} else {
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for (int ms = 0; ms < delay; ms++) {
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UtilsDelay(UTILS_DELAY_US_TO_COUNT(1000));
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}
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}
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}
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void mp_hal_set_interrupt_char (int c) {
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mpexception_set_interrupt_char (c);
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}
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void mp_hal_stdout_tx_str(const char *str) {
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mp_hal_stdout_tx_strn(str, strlen(str));
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}
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void mp_hal_stdout_tx_strn(const char *str, size_t len) {
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if (MP_STATE_PORT(os_term_dup_obj)) {
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if (MP_OBJ_IS_TYPE(MP_STATE_PORT(os_term_dup_obj)->stream_o, &pyb_uart_type)) {
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uart_tx_strn(MP_STATE_PORT(os_term_dup_obj)->stream_o, str, len);
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} else {
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MP_STATE_PORT(os_term_dup_obj)->write[2] = mp_obj_new_str_of_type(&mp_type_str, (const byte *)str, len);
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mp_call_method_n_kw(1, 0, MP_STATE_PORT(os_term_dup_obj)->write);
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}
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}
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// and also to telnet
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telnet_tx_strn(str, len);
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}
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void mp_hal_stdout_tx_strn_cooked (const char *str, size_t len) {
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int32_t nslen = 0;
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const char *_str = str;
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for (int i = 0; i < len; i++) {
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if (str[i] == '\n') {
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mp_hal_stdout_tx_strn(_str, nslen);
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mp_hal_stdout_tx_strn("\r\n", 2);
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_str += nslen + 1;
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nslen = 0;
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} else {
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nslen++;
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}
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}
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if (_str < str + len) {
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mp_hal_stdout_tx_strn(_str, nslen);
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}
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}
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int mp_hal_stdin_rx_chr(void) {
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for ( ;; ) {
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// read telnet first
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if (telnet_rx_any()) {
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return telnet_rx_char();
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} else if (MP_STATE_PORT(os_term_dup_obj)) { // then the stdio_dup
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if (MP_OBJ_IS_TYPE(MP_STATE_PORT(os_term_dup_obj)->stream_o, &pyb_uart_type)) {
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if (uart_rx_any(MP_STATE_PORT(os_term_dup_obj)->stream_o)) {
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return uart_rx_char(MP_STATE_PORT(os_term_dup_obj)->stream_o);
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}
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} else {
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MP_STATE_PORT(os_term_dup_obj)->read[2] = mp_obj_new_int(1);
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mp_obj_t data = mp_call_method_n_kw(1, 0, MP_STATE_PORT(os_term_dup_obj)->read);
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// data len is > 0
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if (mp_obj_is_true(data)) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
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return ((int *)(bufinfo.buf))[0];
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}
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}
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}
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mp_hal_delay_ms(1);
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}
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}
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/******************************************************************************
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DEFINE PRIVATE FUNCTIONS
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******************************************************************************/
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#ifndef USE_FREERTOS
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static void hal_TickInit (void) {
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HAL_tickCount = 0;
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MAP_SysTickIntRegister(HAL_IncrementTick);
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MAP_IntEnable(FAULT_SYSTICK);
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MAP_SysTickIntEnable();
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MAP_SysTickPeriodSet(HAL_FCPU_HZ / HAL_SYSTICK_PERIOD_US);
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// Force a reload of the SysTick counter register
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HWREG(NVIC_ST_CURRENT) = 0;
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MAP_SysTickEnable();
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}
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#endif
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