最近写了一个产生SPWM波的程序，带死区，使用了TIM1和死区寄存器还有DMA1，但是现在产生的波形有问题，如果我删掉死区的那部分设置，其余部分能正常产生一对互补的SPWM波（不带死区），或者删除掉DMA改用定时器中断也可以正常产生带死区的SPWM，初步确定是配置或者寄存器产生了冲突，但是一直没有找到问题所在。请教大家有什么问题帮我纠正一下啊，下面是我的配置程序：
#include "stm32f10x.h"
#define TIM1_CCR3_Address 0x40012C3C
#define TIM1_CCR2_Address 0x40012C38
#define TIM1_CCR1_Address 0x40012C34
#define TIN1_CCR4_Address 0x40012C40
#define MAX_TABLE 180
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
uint16_t SRC_Buffer[MAX_TABLE] = {
1000,1033,1066,1099,1132,1165,1198,1230,1262,1294,1325,1356,1386,1416,1446,1475,
1503,1531,1558,1585,1611,1636,1660,1683,1706,1728,1749,1769,1788,1806,1823,1839,
1854,1868,1881,1893,1904,1913,1922,1929,1936,1941,1945,1948,1949,1950,1949,1948,
1945,1941,1936,1929,1922,1913,1904,1893,1881,1868,1854,1839,1823,1806,1788,1769,
1749,1728,1706,1683,1660,1636,1611,1585,1558,1531,1503,1475,1446,1416,1386,1356,
1325,1294,1262,1230,1198,1165,1132,1099,1066,1033,1000, 967, 934, 901, 868, 835,
802, 770, 738, 706, 675, 644, 614, 584, 554, 525, 497, 469, 442, 415, 389, 364,
340, 317, 294, 272, 251, 231, 212, 194, 177, 161, 146, 132, 119, 107, 96, 87,
78, 71, 64, 59, 55, 52, 51, 50, 51, 52, 55, 59, 64, 71, 78, 87,
96, 107, 119, 132, 146, 161, 177, 194, 212, 231, 251, 272, 294, 317, 340, 364,
389, 415, 442, 469, 497, 525, 554, 584, 614, 644, 675, 706, 738, 770, 802, 835,
868, 901, 934, 967
};
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void DMA_Configuration(void);
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
DMA_Configuration();
/* TIM1 Peripheral Configuration --------------------------------------------*/
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 2000-1;//72M/x=frq R*C=0.025 R=100K,c=100000p=0.1uf=0.0000001f
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 2;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
//TIM_ARRPreloadConfig(TIM1, ENABLE);
/* Channel 3 Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
//启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）
//TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
// TIM_OC2Init(TIM1, &TIM_OCInitStructure);
// //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
// TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
//死区设置
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_DeadTime = 0xf0; //这里调整死区大小0-0xff
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
/* TIM1 Update DMA Request enable */
TIM_DMACmd(TIM1, TIM_DMA_Update, ENABLE);
/* TIM1 counter enable */
TIM_Cmd(TIM1, ENABLE);
/* Main Output Enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
while (1)
{}
}
void RCC_Configuration(void)
{
SystemInit();
/* TIM1, GPIOA and GPIOB clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA |
RCC_APB2Periph_GPIOB, ENABLE);
/* DMA clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Configuration: Channel 3 as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* GPIOB Configuration: Channel 3N as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* DMA1 Channel5 Config */
//DMA_DeInit(DMA1_Channel5);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)TIM1_CCR3_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SRC_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_BufferSize = MAX_TABLE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel5, &DMA_InitStructure);
/* DMA1 Channel5 enable */
DMA_Cmd(DMA1_Channel5, ENABLE);
}
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