mirror of
https://gitee.com/Lyon1998/pikapython.git
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99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
#include "pika_config.h"
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#include "main.h"
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#include <stdio.h>
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/* support interrupt */
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void __platform_disable_irq_handle(){
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__disable_irq();
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}
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void __platform_enable_irq_handle(){
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__enable_irq();
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}
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/* support printf */
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void HARDWARE_PRINTF_Init(void) {
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LL_USART_InitTypeDef USART_InitStruct = {0};
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* Peripheral clock enable */
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_USART1);
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX
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PA10 ------> USART1_RX
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*/
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GPIO_InitStruct.Pin = LL_GPIO_PIN_9;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
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LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = LL_GPIO_PIN_10;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
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LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/* USART1 interrupt Init */
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NVIC_SetPriority(USART1_IRQn, 0);
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NVIC_EnableIRQ(USART1_IRQn);
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USART_InitStruct.PrescalerValue = LL_USART_PRESCALER_DIV1;
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USART_InitStruct.BaudRate = 115200;
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USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
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USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
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USART_InitStruct.Parity = LL_USART_PARITY_NONE;
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USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
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USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
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USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
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LL_USART_Init(USART1, &USART_InitStruct);
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LL_USART_SetTXFIFOThreshold(USART1, LL_USART_FIFOTHRESHOLD_1_8);
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LL_USART_SetRXFIFOThreshold(USART1, LL_USART_FIFOTHRESHOLD_1_8);
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LL_USART_DisableFIFO(USART1);
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LL_USART_ConfigAsyncMode(USART1);
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LL_USART_Enable(USART1);
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/* Polling USART1 initialisation */
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while ((!(LL_USART_IsActiveFlag_TEACK(USART1))) ||
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(!(LL_USART_IsActiveFlag_REACK(USART1)))) {
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}
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/* open interrupt */
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LL_USART_EnableIT_RXNE(USART1);
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LL_USART_EnableIT_PE(USART1);
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}
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int fputc(int ch, FILE* f) {
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LL_USART_TransmitData8(USART1, ch);
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while (LL_USART_IsActiveFlag_TC(USART1) != 1)
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;
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return ch;
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}
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/* support delay_us */
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void delay_us(uint32_t udelay) {
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uint32_t startval, tickn, delays, wait;
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startval = SysTick->VAL;
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tickn = HAL_GetTick();
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delays = udelay * 64; // delay 1us when delays = 64
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if (delays > startval) {
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while (HAL_GetTick() == tickn) {
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}
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wait = 64000 + startval - delays;
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while (wait < SysTick->VAL) {
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}
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} else {
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wait = startval - delays;
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while (wait < SysTick->VAL && HAL_GetTick() == tickn) {
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}
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}
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}
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