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• • 1 波形生成設計

1 波形生成設計

功能非常簡單，直接上代碼：

WaveGen.h：

/*** @brief 波形生成器實現* @details* @author 01課堂 李述銅 http://01ketang.cc* @date 2017-06-01* @version 1.0* @copyright 版權所有，禁止用于商業用途*/ #ifndef WAVEGEN_H #define WAVEGEN_Htypedef enum {WaveSquare,WaveUnknown, }WaveType;void WaveGenInit (void); uint32_t WaveSelectType (WaveType type); uint32_t WaveSquareSet (uint32_t highMs, uint32_t lowMs); uint32_t WaveStartOutput (void); void WaveStopOutput (void);#endif //WAVEGEN_H

WaveGen.h：

/*** @brief 波形生成器實現* @details* @author 01課堂 李述銅 http://01ketang.cc* @date 2017-06-01* @version 1.0* @copyright 版權所有，禁止用于商業用途*/ #include "tinyOS.h" #include "WaveGen.h" #include "stm32f10x_tim.h" // Keil::Device:StdPeriph Drivers:TIMstatic WaveType currentWaveType = WaveUnknown; static tMutex mutex;/*** 波形輸出硬件初始化*/ void WaveGenHalInit (void) {GPIO_InitTypeDef GPIO_InitStructure;TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //打開APB2外設RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //開時鐘GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //PA6 PA7GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //要改為 AF_PPGPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);TIM_DeInit(TIM3); //將TIM3寄存器設為缺省值TIM_TimeBaseStructure.TIM_Period = 72 - 1; //ARR的值,計數周期TIM_TimeBaseStructure.TIM_Prescaler = 36 - 1; //分頻 CK_INT=2MHz 36分頻TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上計數模式TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //初始化定時器3//通道1TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //輸出使能TIM_OCInitStructure.TIM_Pulse = 1 - 1; //待捕獲比較寄存器的值 CRRTIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //高電平有效TIM_OC1Init(TIM3, &TIM_OCInitStructure); //通道初始化TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //預裝載使能 }/*** 初始化波形輸出*/ void WaveGenInit (void) {WaveGenHalInit();currentWaveType = WaveUnknown;tMutexInit(&mutex); }/*** 選擇波形輸出類型* @param type 輸出類型*/ uint32_t WaveSelectType (WaveType type) {uint32_t err = 0;tMutexWait(&mutex, 0);switch (type) {case WaveSquare:currentWaveType = type;err = 0;break;default:err = 1;break;}tMutexNotify(&mutex); }/*** 設置方波的輸出高低電平時間* @param highMs 高電平持續時間，ms為單位* @param lowMs 低電平持續時間，ms為單位*/ uint32_t WaveSquareSet (uint32_t highMs, uint32_t lowMs) {return 0; }/*** 啟動波形輸出*/ uint32_t WaveStartOutput (void) {uint32_t err = 0;tMutexWait(&mutex, 0);switch (currentWaveType) {case WaveSquare:TIM3->CNT = 0;TIM_Cmd(TIM3, ENABLE);//打開定時器err = 0;default:err = 1;}tMutexNotify(&mutex);return err; }/*** 停止波形輸出*/ void WaveStopOutput (void) {tMutexWait(&mutex, 0);switch (currentWaveType) {case WaveSquare:TIM3->CNT = 0;TIM_Cmd(TIM3, DISABLE);break;default:break;}tMutexNotify(&mutex); }

app.c：

/*** @brief tOS應用示例* @details* @author 01課堂 李述銅 http://01ketang.cc* @date 2017-06-01* @version 1.0* @copyright 版權所有，禁止用于商業用途*/ #include "tinyOS.h" #include "app.h" #include "hal.h"#include "button.h" #include "uart.h" #include "extio.h" #include "WaveGen.h"static tTaskStack task1Env[TASK1_ENV_SIZE]; // 任務1的堆棧空間 static tTask task1;void task1Entry (void * param) {WaveSelectType(WaveSquare);for (;;) {WaveStartOutput();tTaskDelay(10);WaveStopOutput();tTaskDelay(10);} }/*** App的初始化*/ void tInitApp (void) {halInit();ButtonInit();UartInit();ExtIOInit();WaveGenInit();tTaskInit(&task1, task1Entry, (void *) 0x0, TASK1_PRIO, task1Env, sizeof(task1Env)); }

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