dma 更新tim比较值

awsawzj

TIM_DMACmd(TIM1,TIM_DMA_Update, ENABLE);
TIM_DMACmd(TIM1,TIM_DMA_CC2, ENABLE);
TIM_DMACmd(TIM1,TIM_DMA_CC3, ENABLE);
TIM_Cmd(TIM1, ENABLE);
//TIM_Cmd(TIM2, ENABLE);
TIM_CtrlPWMOutputs(TIM1,ENABLE);

}
void DMA_Configuration(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    DMA_DeInit(DMA1_Channel5);
 DMA_DeInit(DMA1_Channel3);
    DMA_DeInit(DMA1_Channel6);
    
    DMA_InitStructure.DMA_PeripheralBaseAddr =(vu32) TIM1->CCR1;
    DMA_InitStructure.DMA_MemoryBaseAddr = (vu32)&spwm_biao_600_a;
    DMA_InitStructure.DMA_DIR =DMA_DIR_PeripheralDST;// DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize =600;
    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_VeryHigh;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel5, &DMA_InitStructure);
    DMA_Cmd(DMA1_Channel5,ENABLE);
    
 DMA_InitStructure.DMA_PeripheralBaseAddr =(vu32) TIM1->CCR2;
    DMA_InitStructure.DMA_MemoryBaseAddr = (vu32)&spwm_biao_600_b;
    DMA_InitStructure.DMA_DIR =DMA_DIR_PeripheralDST;// DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize =600;
    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_Channel3, &DMA_InitStructure);
    DMA_Cmd(DMA1_Channel3,ENABLE);

DMA_InitStructure.DMA_PeripheralBaseAddr =(vu32) TIM1->CCR3;
    DMA_InitStructure.DMA_MemoryBaseAddr = (vu32)&spwm_biao_600_b;
    DMA_InitStructure.DMA_DIR =DMA_DIR_PeripheralDST;// DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize =600;
    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_Medium;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel6, &DMA_InitStructure);
    DMA_Cmd(DMA1_Channel6,ENABLE);

awsawzj

回复【2楼】awsawzj:
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已解决

awsawzj

回复【4楼】正点原子:
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DMA_InitStructure.DMA_PeripheralBaseAddr =(vu32) TIM1->CCR1;
改为DMA_InitStructure.DMA_PeripheralBaseAddr =(vu32)& TIM1->CCR1;
取址。

awsawzj

不能进行更改

正点原子

回复【3楼】awsawzj:
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 麻烦楼主将解决方法说一下,方便其他朋友.

正点原子

回复【5楼】awsawzj:
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谢谢分享

小石头

这程序的功能是什么啊？

awsawzj

回复【7楼】小石头:
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利用ＤＭＡ直接更新定时器的比较值

小石头

回复【8楼】awsawzj:
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你有库函数版的这程序吗？求分享我一份QQ1106256891

wso75839840

回复【5楼】awsawzj:
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这种写法很好啊！不用费心思去算寄存器地址了！赞！