STM32F103 DAC+DMA 输出常见波形

#include "bsp.h" /******DAC寄存器地址声明*******/ #define DAC_DHR12R1 (u32)&(DAC->DHR12R1) //DAC通道1输出地址 #define DAC_DHR12R2 (u32)&(DAC->DHR12R2) //DAC通道2输出地址 DAC_InitTypeDef DAC_InitStructure; DMA_InitTypeDef DMA_InitStructure; // 统一的波形表数组 uint16_t wave_tabs[WAVE_TYPE_COUNT][WAVE_SIZE] = { [NO_WAVE] = { // 无波形 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, [SIN_WAVE] = { // 正弦波 后面用函数生成 0, 39, 156, 345, 600, 910, 1264, 1648, 2048, 2832, 3186, 3496, 3751, 3940, 4057, 4095, 4057, 3940, 3751, 3496, 3186, 2832, 2448, 2048, 1648, 1264, 910, 600, 345, 156, 39, 0 }, [EXPON_WAVE] = { // 指数波 0, 435, 850, 1229, 1564, 1855, 2105, 2317, 2499, 2655, 2789, 2906, 3007, 3096, 3175, 3245, 3307, 3363, 3413, 3459, 3500, 3538, 3573, 3605, 3634, 3662, 3687, 3710, 3732, 3753, 3772, 3790, 3807, 3823, 3838, 3852, 3865, 3878, 3890, 3901, 3912, 3923, 3933, 3942, 3951, 3960, 3968, 3976, 3984, 3991, 3998, 4005, 4011, 4017, 4023, 4029, 4035, 4040, 4045, 4050, 4055, 4060, 4064, 4069, 4095, 3660, 3245, 2866, 2531, 2240, 1990, 1778, 1596, 1440, 1306, 1189, 1088, 1000, 920, 850, 788, 732, 682, 636, 595, 557, 522, 490, 461, 433, 408, 385, 363, 342, 323, 305, 288, 272, 257, 243, 230, 217, 205, 194, 183, 172, 162, 153, 144, 135, 127, 119, 111, 104, 97, 90, 84, 78, 72, 66, 60, 55, 50, 45, 40, 35, 31, 26 }, [TRIANG_WAVE] = { // 三角波 后面用函数生成 0, 268, 536, 805, 1073, 1341, 1610, 1878, 2146, 2415, 2683, 2951, 3220, 3488, 3756, 4095, 4095, 3827, 3559, 3290, 3022, 2754, 2483, 2215, 1947, 1678, 1410, 1142, 871, 603, 335, 0 }, [SQUARE_WAVE] = { // 方波 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, }, [SAWTOOTH_WAVE] = { // 锯齿波 后面用函数生成 0, 136, 273, 409, 546, 682, 819, 955, 1092, 1228, 1365, 1501, 1638, 1774, 1911, 2047, 2184, 2320, 2457, 2593, 2730, 2866, 3003, 3139, 3276, 3412, 3549, 3685, 3822, 3958, 4095, 0 }, [CONTINUOUS_WAVE] = { // 等幅波 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095,4095, 4095, 4095, 4095, 4095, 4095, 4095, 0, }, [SHARP_WAVE] = { // 尖波 后面用函数生成 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4095, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, [MIXED_WAVE] = { // 混合波 没有用到 0,27,190,200,290,380,460,540,600,680,800,1000,1400,2000,2890,4095, 0,0,0,0,0,0,0,0,4095,4095,4095,4095,4095,4095,4095,4095, } }; #define M_PI 3.14159265358979323846 #define MAX_VALUE 4095 // 生成从 0 到 4095 再到 0 的半个正弦波数据 static void generate_sine_wave(void) { for (uint16_t i = 0; i < WAVE_SIZE; i++) { // 计算 0 到 π 之间的角度 double angle = M_PI * i / (WAVE_SIZE - 1); // 计算正弦值并缩放至 0 到 4095 范围 wave_tabs[SIN_WAVE][i] = (uint16_t)(MAX_VALUE * (sin(angle))); } } // 生成三角波数据的函数 static void generate_triangle_wave(void) { for (int i = 0; i < WAVE_SIZE; i++) { if (i < WAVE_SIZE / 2) { // 上升阶段 wave_tabs[TRIANG_WAVE][i] = (MAX_VALUE / (WAVE_SIZE / 2)) * i; } else { // 下降阶段 wave_tabs[TRIANG_WAVE][i] = MAX_VALUE - ((MAX_VALUE / (WAVE_SIZE / 2)) * (i - WAVE_SIZE / 2)); } } } // 生成锯齿波数据的函数 static void generate_sawtooth_wave(void) { for (int i = 0; i < WAVE_SIZE; i++) { wave_tabs[SAWTOOTH_WAVE][i] = (MAX_VALUE / (WAVE_SIZE - 1)) * i; } } // 生成尖波数据的函数 static void generate_spike_wave(void) { // 假设尖波在中间位置达到最大值 int peak_index = WAVE_SIZE / 2; for (int i = 0; i < WAVE_SIZE; i++) { if (i == peak_index) { wave_tabs[SHARP_WAVE][i] = MAX_VALUE; } else { wave_tabs[SHARP_WAVE][i] = 0; } } } // 初始化 波形 static void Init_Wave_Tabs(void) { // 遍历每一行并用 memset 填充值 0x66 for (int i = 0; i < WAVE_TYPE_COUNT; i++) { for(int j = 0; j < WAVE_SIZE; j++) { A_wave_tabs[i][j] = 0x00; B_wave_tabs[i][j] = 0x00; } } generate_sine_wave(); /*生成 正弦波*/ generate_triangle_wave();/*生成 三角波*/ generate_sawtooth_wave();/*生成 锯齿波*/ generate_spike_wave(); /*生成 尖波*/ } static void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStruct; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC, ENABLE); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 ; //GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; //输出速率 GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 ; /*插入检测*/ GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; //输出速率 GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOC, &GPIO_InitStruct); } static void DAC_Configuration(void) { RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); /**************DAC结构初始化*******************/ DAC_StructInit(&DAC_InitStructure); DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;//不产生波形 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; //不使能输出缓存 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;//DAC触发为定时器2触发 DAC_Init(DAC_Channel_1, &DAC_InitStructure);//初始化 DAC_Cmd(DAC_Channel_1, ENABLE); //使能DAC的通道1 DAC_DMACmd(DAC_Channel_1, ENABLE); //使能DAC通道1的DMA DAC_Init(DAC_Channel_2, &DAC_InitStructure);//初始化 DAC_Cmd(DAC_Channel_2, ENABLE); //使能DAC的通道2 DAC_DMACmd(DAC_Channel_2, ENABLE); //使能DAC通道2的DMA } static void DMA_Configuration(void) { RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);//开启DMA2时钟 DMA_DeInit(DMA2_Channel3); DMA_DeInit(DMA2_Channel4); /* 配置DMA2 */ DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&DAC->DHR12R1; //外设数据地址 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&wave_tabs[NO_WAVE] ; //内存数据地址 DAC_Buf 修改这个地址可以输出不同波形 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //数据传输方向内存至外设 DMA_InitStructure.DMA_BufferSize = WAVE_SIZE; //缓存大小为32字节 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设数据地址固定 DMA_InitStructure.DMA_MemoryInc = DMA_Me