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feat: ll uart rx interrupts demo
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IOsetting
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160
Examples/LL/USART/UART_RX_Interrupt/main.c
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160
Examples/LL/USART/UART_RX_Interrupt/main.c
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/***
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* Demo: RX Interrupts
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*/
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#include "main.h"
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#define BUF_SIZE 128
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uint8_t pBuf[BUF_SIZE], ch;
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__IO uint8_t printFlag = 0, pos = 0;
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static void APP_SystemClockConfig(void);
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void APP_USART_Config(uint32_t baudRate);
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void APP_USART_IRQCallback(USART_TypeDef *USARTx);
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int main(void)
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{
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APP_SystemClockConfig();
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APP_USART_Config(115200);
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printf("PY32F0 UART Interrupt RX Demo\r\nClock: %ld\r\n", SystemCoreClock);
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while (1)
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{
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if (printFlag == 1)
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{
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LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_5);
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printf("%s\r\n", pBuf);
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printFlag = 0;
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pos = 0;
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}
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}
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}
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void USART2_IRQHandler(void)
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{
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APP_USART_IRQCallback(USART2);
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}
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/**
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* @brief USART2 GPIO & Interrupt Config
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*/
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void APP_USART_Config(uint32_t baudRate)
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{
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_USART2);
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/* USART2 Init */
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LL_USART_SetBaudRate(USART2, SystemCoreClock, LL_USART_OVERSAMPLING_16, baudRate);
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LL_USART_SetDataWidth(USART2, LL_USART_DATAWIDTH_8B);
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LL_USART_SetStopBitsLength(USART2, LL_USART_STOPBITS_1);
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LL_USART_SetParity(USART2, LL_USART_PARITY_NONE);
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LL_USART_SetHWFlowCtrl(USART2, LL_USART_HWCONTROL_NONE);
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// Both direction
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LL_USART_SetTransferDirection(USART2, LL_USART_DIRECTION_TX_RX);
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LL_USART_Enable(USART2);
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LL_USART_ClearFlag_TC(USART2);
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
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// PA2 ------> USART1_TX
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_2, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_2, LL_GPIO_SPEED_FREQ_VERY_HIGH);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_2, LL_GPIO_PULL_UP);
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LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_2, LL_GPIO_AF_4);
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// PA3 ------> USART1_RX
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_3, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_3, LL_GPIO_SPEED_FREQ_VERY_HIGH);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_3, LL_GPIO_PULL_UP);
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LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_3, LL_GPIO_AF_4);
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// Enable parity error interrupt
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LL_USART_EnableIT_PE(USART2);
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// Enable framing error, overrun error and noise error interrupt
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LL_USART_EnableIT_ERROR(USART2);
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// Enable RX not empty interrupt
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LL_USART_EnableIT_RXNE(USART2);
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// Interrupt priority
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NVIC_SetPriority(USART2_IRQn, 1);
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NVIC_EnableIRQ(USART2_IRQn);
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#if defined (__GNUC__) && !defined (__clang__)
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// To avoid io buffer
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setvbuf(stdout, NULL, _IONBF, 0);
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setvbuf(stdin, NULL, _IONBF, 0);
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#endif
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}
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void APP_USART_IRQCallback(USART_TypeDef *USARTx)
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{
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// Parity Error
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if (LL_USART_IsActiveFlag_PE(USARTx))
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{
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LL_USART_ClearFlag_PE(USARTx);
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}
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// Framing Error
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if (LL_USART_IsActiveFlag_FE(USARTx))
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{
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LL_USART_ClearFlag_FE(USARTx);
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}
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// OverRun Error
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if (LL_USART_IsActiveFlag_ORE(USARTx))
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{
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LL_USART_ClearFlag_ORE(USARTx);
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}
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// Noise error
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if (LL_USART_IsActiveFlag_NE(USARTx))
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{
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LL_USART_ClearFlag_NE(USARTx);
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}
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// RX Not Empty, RX Not Empty Interrupt is enabled
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if (LL_USART_IsActiveFlag_RXNE(USARTx) && LL_USART_IsEnabledIT_RXNE(USARTx))
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{
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// Read one byte
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ch = LL_USART_ReceiveData8(USARTx);
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if (ch == '\r' || ch == '\n')
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{
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// Set print flag when meet \r or \n, ignore empty string
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if (pos > 0)
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{
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pBuf[pos++] = '\0';
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printFlag = 1;
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}
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}
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else
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{
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// Append new char
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pBuf[pos++] = ch;
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if (pos == BUF_SIZE)
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{
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pos = 0;
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}
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}
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// Read USART_DR will clear RXNE flag, so LL_USART_ClearFlag_RXNE() is not necessary
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}
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}
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static void APP_SystemClockConfig(void)
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{
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LL_RCC_HSI_Enable();
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while(LL_RCC_HSI_IsReady() != 1);
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_Init1msTick(8000000);
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LL_SetSystemCoreClock(8000000);
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}
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void APP_ErrorHandler(void)
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{
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while (1);
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}
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#ifdef USE_FULL_ASSERT
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void assert_failed(uint8_t *file, uint32_t line)
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{
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while (1);
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}
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#endif /* USE_FULL_ASSERT */
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57
Examples/LL/USART/UART_RX_Interrupt/main.h
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57
Examples/LL/USART/UART_RX_Interrupt/main.h
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/**
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******************************************************************************
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* @file main.h
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* @author MCU Application Team
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* @brief Header for main.c file.
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* This file contains the common defines of the application.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) Puya Semiconductor Co.
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* All rights reserved.</center></h2>
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef __MAIN_H
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#define __MAIN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Includes ------------------------------------------------------------------*/
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#include <stdio.h>
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#include "py32f0xx_ll_rcc.h"
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#include "py32f0xx_ll_bus.h"
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#include "py32f0xx_ll_system.h"
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#include "py32f0xx_ll_exti.h"
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#include "py32f0xx_ll_cortex.h"
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#include "py32f0xx_ll_utils.h"
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#include "py32f0xx_ll_pwr.h"
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#include "py32f0xx_ll_dma.h"
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#include "py32f0xx_ll_gpio.h"
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#include "py32f0xx_ll_usart.h"
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/* Private includes ----------------------------------------------------------*/
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/* Private defines -----------------------------------------------------------*/
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/* Exported variables prototypes ---------------------------------------------*/
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/* Exported functions prototypes ---------------------------------------------*/
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void APP_ErrorHandler(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __MAIN_H */
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/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
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84
Examples/LL/USART/UART_RX_Interrupt/py32f0xx_it.c
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84
Examples/LL/USART/UART_RX_Interrupt/py32f0xx_it.c
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/**
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******************************************************************************
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* @file py32f0xx_it.c
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* @author MCU Application Team
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* @brief Interrupt Service Routines.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) Puya Semiconductor Co.
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* All rights reserved.</center></h2>
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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#include "py32f0xx_it.h"
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/* Private includes ----------------------------------------------------------*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private user code ---------------------------------------------------------*/
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/* External variables --------------------------------------------------------*/
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/******************************************************************************/
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/* Cortex-M0+ Processor Interruption and Exception Handlers */
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/******************************************************************************/
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/**
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* @brief This function handles Non maskable interrupt.
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*/
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void NMI_Handler(void)
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{
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}
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/**
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* @brief This function handles Hard fault interrupt.
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*/
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void HardFault_Handler(void)
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{
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while (1)
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{
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}
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}
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/**
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* @brief This function handles System service call via SWI instruction.
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*/
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void SVC_Handler(void)
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{
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}
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/**
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* @brief This function handles Pendable request for system service.
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*/
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void PendSV_Handler(void)
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{
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}
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/**
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* @brief This function handles System tick timer.
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*/
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void SysTick_Handler(void)
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{
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}
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/******************************************************************************/
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/* PY32F0xx Peripheral Interrupt Handlers */
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/* Add here the Interrupt Handlers for the used peripherals. */
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/* For the available peripheral interrupt handler names, */
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/* please refer to the startup file. */
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/******************************************************************************/
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/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
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49
Examples/LL/USART/UART_RX_Interrupt/py32f0xx_it.h
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49
Examples/LL/USART/UART_RX_Interrupt/py32f0xx_it.h
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/**
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******************************************************************************
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* @file py32f0xx_it.h
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* @author MCU Application Team
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* @brief This file contains the headers of the interrupt handlers.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) Puya Semiconductor Co.
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* All rights reserved.</center></h2>
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef __PY32F0XX_IT_H
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#define __PY32F0XX_IT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Private includes ----------------------------------------------------------*/
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/* Exported types ------------------------------------------------------------*/
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/* Exported constants --------------------------------------------------------*/
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/* Exported macro ------------------------------------------------------------*/
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/* Exported functions prototypes ---------------------------------------------*/
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void NMI_Handler(void);
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void HardFault_Handler(void);
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void SVC_Handler(void);
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void PendSV_Handler(void);
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void SysTick_Handler(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PY32F0XX_IT_H */
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/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
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