/**
******************************************************************************
* @file bsp_xxx.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief adc1 应用bsp / DMA 模式
******************************************************************************
* @attention
*
* 实验平台:秉火STM32 霸道 开发板
* 论坛 :http://www.firebbs.cn
* 淘宝 :http://fire-stm32.taobao.com
*
******************************************************************************
*/
#include "./dac/bsp_dac.h"
//正弦波单个周期的点数
//#define POINT_NUM 32
///* 波形数据 ---------------------------------------------------------*/
//const uint16_t Sine12bit[POINT_NUM] = {
// 2048 , 2460 , 2856 , 3218 , 3532 , 3786 , 3969 , 4072 ,
// 4093 , 4031 , 3887 , 3668 , 3382 , 3042 , 2661 , 2255 ,
// 1841 , 1435 , 1054 , 714 , 428 , 209 , 65 , 3 ,
// 24 , 127 , 310 , 564 , 878 , 1240 , 1636 , 2048
//};
#define POINT_NUM 128
/* 波形数据 ---------------------------------------------------------*/
const uint16_t Sine12bit[POINT_NUM] = {
2148,2249,2349,2448,2546,2643,2738,2832,2924,3013,3101,
3186,3268,3347,3423,3496,3565,3631,3693,3751,3805,3854,
3899,3940,3976,4008,4035,4057,4074,4086,4094,4095,4094,
4086,4074,4057,4035,4008,3976,3940,3899,3854,3805,3751,
3693,3631,3565,3496,3423,3347,3268,3186,3101,3013,2924,
2832,2738,2643,2546,2448,2349,2249,2148,2048,1948,1847,
1747,1648,1550,1453,1358,1264,1172,1083,995,910,828,749,
673,600,531,465,403,345,291,242,197,156,120,88,61,39,22,
10,2,0,2,10,22,39,61,88,120,156,197,242,291,345,403,465,531,
600,673,749,828,910,995,1083,1172,1264,1358,1453,1550,1648,
1747,1847,1948,2048};
uint32_t DualSine12bit[POINT_NUM];
/**
* @brief 使能DAC的时钟，初始化GPIO
* @param 无
* @retval 无
*/
static void DAC_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DAC_InitTypeDef DAC_InitStructure;
/* 使能GPIOA时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* 使能DAC时钟 */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
/* DAC的GPIO配置，模拟输入 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* 配置DAC 通道1 */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; //使用TIM2作为触发源
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; //不使用波形发生器
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; //不使用DAC输出缓冲
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
/* 配置DAC 通道2 */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T4_TRGO; //使用TIM2作为触发源
DAC_Init(DAC_Channel_2, &DAC_InitStructure);
/* 使能通道1 由PA4输出 */
DAC_Cmd(DAC_Channel_1, ENABLE);
/* 使能通道2 由PA5输出 */
DAC_Cmd(DAC_Channel_2, ENABLE);
/* 使能DAC的DMA请求 */
DAC_DMACmd(DAC_Channel_1, ENABLE);
DAC_DMACmd(DAC_Channel_2, ENABLE);
}
/**
* @brief 配置TIM
* @param 无
* @retval 无
*/
static void DAC_TIM2_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* 使能TIM2时钟，TIM2CLK 为72M */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* TIM2基本定时器配置 */
// TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = (938-1); //定时600Hz
TIM_TimeBaseStructure.TIM_Prescaler = 0x0; //预分频，不分频 72M / (0+1) = 72M
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分频系数
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* 配置TIM2触发源 */
TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
/* 使能TIM2 */
TIM_Cmd(TIM2, ENABLE);
}
static void DAC_TIM4_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* 使能TIM2时钟，TIM2CLK 为72M */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
/* TIM2基本定时器配置 */
// TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = (268-1); //定时2100Hz
TIM_TimeBaseStructure.TIM_Prescaler = 0x0; //预分频，不分频 72M / (0+1) = 72M
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分频系数
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
/* 配置TIM2触发源 */
TIM_SelectOutputTrigger(TIM4, TIM_TRGOSource_Update);
/* 使能TIM2 */
TIM_Cmd(TIM4, ENABLE);
}
/**
* @brief 配置DMA
* @param 无
* @retval 无
*/
static void DAC_DMA2_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* 使能DMA2时钟 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
/* 配置DMA2 */
DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_ADDRESS2; //外设数据地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit ; //内存数据地址 DualSine12bit
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //数据传输方向内存至外设
DMA_InitStructure.DMA_BufferSize = POINT_NUM; //缓存大小为POINT_NUM字节
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设数据地址固定
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存数据地址自增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; //外设数据以字为单位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; //内存数据以字为单位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高DMA通道优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //非内存至内存模式
DMA_Init(DMA2_Channel4, &DMA_InitStructure);
/* 使能DMA2-14通道 */
DMA_Cmd(DMA2_Channel4, ENABLE);
}
static void DAC_DMA1_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* 使能DMA1时钟 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
/* 配置DMA1 */
DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_ADDRESS1; //外设数据地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit ; //内存数据地址 DualSine12bit
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //数据传输方向内存至外设
DMA_InitStructure.DMA_BufferSize = POINT_NUM; //缓存大小为POINT_NUM字节
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设数据地址固定
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存数据地址自增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; //外设数据以字为单位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; //内存数据以字为单位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高DMA通道优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //非内存至内存模式
DMA_Init(DMA2_Channel3, &DMA_InitStructure);
/* 使能DMA2-14通道 */
DMA_Cmd(DMA2_Channel3, ENABLE);
}
/**
* @brief DAC初始化函数
* @param 无
* @retval 无
*/
void DAC_Mode_Init(void)
{
uint32_t Idx = 0;
DAC_Config();
DAC_TIM2_Config();
DAC_TIM4_Config();
/* 填充正弦波形数据，双通道右对齐*/
for (Idx = 0; Idx < POINT_NUM; Idx++)
{
DualSine12bit[Idx] = (Sine12bit[Idx] << 16) + (Sine12bit[Idx]);
}
DAC_DMA2_Config();
DAC_DMA1_Config();
} |
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