[问答]

STM32G474 DMA传输错误和DAC欠载要如何解决？

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问答对人有帮助，内容完整，我也想知道答案 0 我正在尝试使用 DMA 和 tiM6 外设将波形表写入 DAC 外设。 TIM6 确实按预期工作。我还可以看到 DMA 通过 TIM6_TRGO 触发。但是 DMA 传输会导致传输错误，从而导致 DAC 欠载运行。由于前者的错误，后者是预期的。某些东西，我在导致 TE IRQ 被提升的 DMA 设置中丢失，但不知何故我对错误视而不见。有人可以再借一套眼球吗？ static void SystemClock_Config(void) { LL_FLASH_SetLatency(LL_FLASH_LATENCY_7); LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1); LL_RCC_HSI_Enable(); while (LL_RCC_HSI_IsReady() != 1) {} /* Wait till HSI is ready / LL_RCC_HSI_SetCalibTrimming(64); LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_4, 75, LL_RCC_PLLR_DIV_2); LL_RCC_PLL_EnableDomain_SYS(); LL_RCC_PLL_Enable(); while (LL_RCC_PLL_IsReady() != 1) {} / Wait till PLL is ready / LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL); LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2); / Wait till System clock is ready / while (LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) {} / ensure 1µs transition state at intermediate medium speed clock based on DWT / CoreDebug->DEMCR \|= CoreDebug_DEMCR_TRCENA_Msk; DWT->CTRL \|= DWT_CTRL_CYCCNTENA_Msk; DWT->CYCCNT = 0; while (DWT->CYCCNT < 100); LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1); / Set AHB prescaler/ LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1); LL_RCC_SetAPB2Prescaler(LL_RCC_APB1_DIV_1); LL_Init1msTick(150000000); LL_SetSystemCoreClock(150000000); } int main(void) { LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG); / SYSCFGEN / LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR); / PWREN / NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4); SystemClock_Config(); uart_init(); led_init(); printf("nt------------------n"); printf("tSTM32G474 DAC Testn"); printf("t------------------n"); dma_init(); tim_init(); dac_init(); dac_enable(); / Enable DAC / while (1) {} } static void dma_init(void) { LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMAMUX1); / DMAMUX clk enable / LL_DMA_SetPeriphRequest(DMA1, LL_DMA_CHANNEL_1, LL_DMAMUX_REQ_DAC1_CH1); / DMAMUX: DMA1_Ch1->DAC1_Ch1 / LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1); / enable DMA1 clock / / DAC1_CH1 Init / LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_1, LL_DMA_DIRECTION_MEMORY_TO_PERIPH); LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MODE_CIRCULAR); LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PERIPH_NOINCREMENT); LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MEMORY_INCREMENT); LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PDATAALIGN_HALFWORD); LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MDATAALIGN_HALFWORD); LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_LOW); / Set DMA transfer addresses of source and destination / LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_1, (uint32_t ) sin_tbl_12b_32samples, LL_DAC_DMA_GetRegAddr(DAC1, LL_DAC_CHANNEL_1, LL_DAC_DMA_REG_DATA_12BITS_RIGHT_ALIGNED), LL_DMA_DIRECTION_MEMORY_TO_PERIPH); LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_1, TABLE_SIZE); NVIC_EnableIRQ(DMA1_Channel1_IRQn); / enable DMA1 CH1 IRQ / LL_DMA_EnableIT_TE(DMA1, LL_DMA_CHANNEL_1); / Enable TX error DMARQ / LL_DMA_EnableIT_TC(DMA1, LL_DMA_CHANNEL_1); / Enable TC DMARQ / LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1); / Enable DMA transfer / } static void tim_init(void) { uint32_t clk, per, psc; LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM6); / enable TMR clock / NVIC_EnableIRQ(TIM6_DAC_IRQn); / enable TMR IRQ / if (LL_RCC_GetAPB1Prescaler() == LL_RCC_APB1_DIV_1) clk = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler()); else clk = (__LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler()) 2); /** * Timer prescaler calculation * Computation for timer 16 bits, additional + 1 to round the prescaler up / psc = ((clk / (TMR_PSC_MAX TMR_FREQ_MIN)) + 1); per = (clk / (psc * TMR_FREQ)); /* Timer reload calculation / LL_TIM_SetPrescaler(TIM6, (psc - 1)); / set timer pre-scaler value / LL_TIM_SetAutoReload(TIM6, (per - 1)); / set timer auto-reload value / LL_TIM_SetCounterMode(TIM6, LL_TIM_COUNTERMODE_UP); / set counter mode / LL_TIM_SetRepetitionCounter(TIM6, 0); / set the repetition counter / LL_TIM_DisableARRPreload(TIM6); LL_TIM_SetTriggerOutput(TIM6, LL_TIM_TRGO_UPDATE); / DAC trigger output / LL_TIM_DisableMasterSlaveMode(TIM6); LL_TIM_EnableIT_UPDATE(TIM6); / enable Update IRQ / LL_TIM_EnableCounter(TIM6); / enable counter / } static void dac_init(void) { LL_GPIO_InitTypeDef gpio = {0}; LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_DAC1); / enable DAC1 clock / LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA); / enable GPIOA clock / NVIC_EnableIRQ(TIM6_DAC_IRQn); / enable DAC1 IRQ / gpio.Pin = LL_GPIO_PIN_4; / PA.4 / gpio.Mode = LL_GPIO_MODE_ANALOG; / PA.4 -> DAC1_OUT1 / gpio.Pull = LL_GPIO_PULL_NO; LL_GPIO_Init(GPIOA, &gpio); LL_DAC_SetSignedFormat(DAC1, LL_DAC_CHANNEL_1, LL_DAC_SIGNED_FORMAT_DISABLE); / DAC channel OUT1 config / LL_DAC_SetWaveAutoGeneration(DAC1, / diasble waveform generator / LL_DAC_CHANNEL_1, LL_DAC_WAVE_AUTO_GENERATION_NONE); LL_DAC_SetTriggerSource(DAC1, LL_DAC_CHANNEL_1, LL_DAC_TRIG_EXT_TIM6_TRGO); / Select trigger source / LL_DAC_ConfigOutput(DAC1, / Set the DAC channel output / LL_DAC_CHANNEL_1, LL_DAC_OUTPUT_MODE_NORMAL, LL_DAC_OUTPUT_BUFFER_ENABLE, LL_DAC_OUTPUT_CONNECT_GPIO); LL_DAC_EnableDMAReq(DAC1, LL_DAC_CHANNEL_1); / Enable DAC DMARQ / // LL_DAC_EnableIT_DMAUDR1(DAC1); / DAC Channel1 underrun IRQ / } void DMA1_Channel1_IRQHandler(void) { if (LL_DMA_IsActiveFlag_TE1(DMA1)) { printf("- TE -n"); debug_dac(); debug_dma(); debug_dmach(); LL_DMA_ClearFlag_TE1(DMA1); } if (LL_DMA_IsActiveFlag_TC1(DMA1)) { LL_DMA_ClearFlag_GI1(DMA1); LL_DMA_ClearFlag_TC1(DMA1); printf("- TC -n"); } } void TIM6_DAC_IRQHandler(void) { if (LL_DAC_IsActiveFlag_DMAUDR1(DAC1)) { / Check for DAC Ch1 underrun IRQ / // printf("- UDR -n"); LL_DAC_ClearFlag_DMAUDR1(DAC1); / Clear flag DAC Ch1 underrun / LL_DAC_DisableIT_DMAUDR1(DAC1); } if (LL_TIM_IsActiveFlag_UPDATE(TIM6)) { LL_TIM_ClearFlag_UPDATE(TIM6); LL_GPIO_TogglePin(GPIOA, LL_GPIO_PIN_5); } } 这导致以下输出： ------------------ STM32G474 DAC Test ------------------ - TE - -------------- DAC1 Debug -------------- Debug> DAC1->CR :0x101f Debug> DAC1->SWTRIGR :0x00 Debug> DAC1->DHR12R1 :0x00 Debug> DAC1->DHR12L1 :0x00 Debug> DAC1->DHR8R1 :0x00 Debug> DAC1->DHR12R2 :0x00 Debug> DAC1->DHR12L2 :0x00 Debug> DAC1->DHR8R2 :0x00 Debug> DAC1->DHR12RD :0x00 Debug> DAC1->DHR12LD :0x00 Debug> DAC1->DHR8RD :0x00 Debug> DAC1->DOR1 :0x00 Debug> DAC1->DOR2 :0x00 Debug> DAC1->SR :0x2800 Debug> DAC1->CCR :0x1f001f Debug> DAC1->MCR :0x00 Debug> DAC1->SHSR1 :0x00 Debug> DAC1->SHSR2 :0x00 Debug> DAC1->SHHR :0x10001 Debug> DAC1->SHRR :0x10001 Debug> DAC1->STR1 :0x00 Debug> DAC1->STR2 :0x00 Debug> DAC1->STMODR :0x00 ------------------------------------------ -------------- DMA1 Debug -------------- Debug> DMA1->ISR :0x09 Debug> DMA1->IFCR :0x00 ------------------------------------------ -------------- DMA Chx Debug *-------------- Debug> DMA_Ch1->CCR :0x5ba Debug> DMA_Ch1->CNDTR:0x20 Debug> DMA_Ch1->CPAR :0x50000808 Debug> DMA_Ch1->CMAR :0x8001cbe ------------------------------------------ 有什么想法吗？ 0
2023-1-11 06:00:43　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 47 个回答。邀请回答 chm5 该类别下有 44 个回答。邀请回答新星之火12138 该类别下有 42 个回答。邀请回答 hgimtk 该类别下有 36 个回答。邀请回答 HengDu 该类别下有 31 个回答。邀请回答 hwp0415229 该类别下有 30 个回答。邀请回答可口可甜该类别下有 30 个回答。邀请回答 jghgfdssas 该类别下有 28 个回答。邀请回答 jiangwenwen 该类别下有 28 个回答。邀请回答 kingnet6688 该类别下有 28 个回答。邀请回答麻酱该类别下有 28 个回答。邀请回答 andyfly7 该类别下有 28 个回答。邀请回答 bluepink 该类别下有 27 个回答。邀请回答法规处发该类别下有 27 个回答。邀请回答 ldliu 该类别下有 27 个回答。邀请回答成长的小师弟该类别下有 27 个回答。邀请回答云汉007 该类别下有 27 个回答。邀请回答颜刚YanG 该类别下有 27 个回答。邀请回答柱子图宁该类别下有 27 个回答。邀请回答 uuwyfsdfsf 该类别下有 26 个回答。邀请回答举报高桂清相关推荐 • 带DMA的STM32G474 DAC不工作是为什么？ 537 • 如何使用STM32CubeMX HAL通过DMA + DAC生成STM32G474信号？ 608 • stm32g474 hrtim中怎么使用dual channel DAC trigger？ 426 • Stm32G474，DMA传输全部完毕后如何产生中断并调运回调函数？ 492 • 请问STM32G474使用HRTIME来做DAC锯齿波生成的锯齿波增量和步进频率是否存在限制关系？ 694 • 可以在FOC控制上使用STM32G474作为STM32f303吗？ 580 • stm32g474的外部中断如何配置？ 1110 • 用STM32G474如何实现带同步整流管的BUCK电路？ 1085 • 怎样去解决STM32G474无法写入DAC_DHRx寄存器的问题 737 • 如何利用STM32G474设计双向变流器？ 2159 1个回答

答案对人有帮助，有参考价值 0 DMA 配置应仅在配置 DAC 后进行。我几乎没有意识到 Cube G4 1.3 包中提供了该解决方案。

2023-1-11 15:28:56 评论举报万腾龙