029sge, 把time配置成pwm 后，有没有方法通过pdma输入一组数据...

只看该作者 · 2022-3-23 10:03

把time配置成pwm已经完成，但是把buffer 200多个字数据通过pdma输入到TIMER1 -> PWMCMPDAT，总是会卡在while处。类似的程序功能stm32可以实现。本人不确定，029芯片pdma是不是可以这样使用，如果可以请教高人，下面的程序哪里有问题，谢谢。

只看该作者 · 2022-3-23 10:05

问题补充：029sge程序：不能实现功能，卡在while

/* Enable PDMA clock source */

CLK_EnableModuleClock(PDMA_MODULE);

/* Open Channel 2 */

PDMA_Open(1 << 2);

/* Transfer count is PDMA_TEST_LENGTH, transfer width is 32 bits(one word) */

PDMA_SetTransferCnt(2, PDMA_WIDTH_32, buffersize);

/* Set source address is au8SrcArray, destination address is au8DestArray, Source/Destination increment size is 32 bits(one word) */

PDMA_SetTransferAddr(2, (uint32_t)LED_BYTE_Buffer, PDMA_SAR_INC, (uint32_t)(&(TIMER1 -> PWMCMPDAT)), PDMA_DAR_FIX);

/* Request source is memory to TMR1 */

PDMA_SetTransferMode(2, PDMA_TMR1, FALSE, 0);

/* Transfer type is burst transfer and burst size is 1 */

PDMA_SetBurstType(2, PDMA_REQ_BURST, PDMA_BURST_1);

TPWM_CLEAR_COUNTER(TIMER1);

/* Start Timer PWM counter */

TPWM_START_COUNTER(TIMER1);

/* Generate a software request to trigger transfer with PDMA channel 2 */

PDMA_Trigger(2);

while(!(PDMA_GET_TD_STS() & PDMA_TDSTS_TDIF2_Msk));

TPWM_STOP_COUNTER(TIMER1);

/* Clear transfer done flag of channel 2 */

PDMA_CLR_TD_FLAG(PDMA_TDSTS_TDIF2_Msk);

只看该作者 · 2022-3-23 10:06

stm32程序，可以实现想要的功能

DMA_SetCurrDataCounter(DMA1_Channel7, buffersize);

TIM_SetCounter(TIM2,0x0000);

TIM_Cmd(TIM2, ENABLE); // enable Timer 2

DMA_Cmd(DMA1_Channel7, ENABLE);

while(!DMA_GetFlagStatus(DMA1_FLAG_TC7)); // wait until transfer complete

TIM_Cmd(TIM2, DISABLE); // disable Timer 2

TIM_ClearFlag(TIM2,TIM_FLAG_CC2);

DMA_Cmd(DMA1_Channel7, DISABLE); // disable DMA channel 7

DMA_ClearFlag(DMA1_FLAG_TC7); // clear DMA1 Channel 7 transfer complete flag

只看该作者 · 2022-3-24 10:35

PWM CAPTURE+PDMA可以。
TIMER CAPTURE不行