STM32H7的DMA双缓冲控制IO输出脉冲 keil的sct文件配置 MPU配置 初始化DMA双缓冲 初始化TIM12用处触发DMAMUX的请求发生器
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; * * * Scatter- Loading Description File generated by uVision * * *
; * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * LR_IROM1 0x08000000 0x00200000 { ; load region size_regionER_IROM1 0x08000000 0x00200000 { ; load address = execution address* . o ( RESET, + First) * ( InRoot$$Sections) . ANY ( + RO) } RW_IRAM1 0x20000000 0x00020000 { ; RW data - 128 KB DTCM. ANY ( + RW + ZI) } RW_IRAM2 0x24000000 0x00080000 { ; RW data - 512 KB AXI SRAM* ( . RAM_D1) } RW_IRAM3 0x30000000 0x00048000 { ; RW data - 128 KB SRAM1 ( 0x30000000 ) + 128 KB SRAM2 ( 0x3002 0000 ) + 32 KB SRAM3 ( 0x30040000 ) * ( . RAM_D2) } RW_IRAM4 0x38000000 0x00010000 { ; RW data - 64 KB SRAM4 ( 0x38000000 ) * ( . RAM_D3) }
}
MPU_InitStruct. Enable = MPU_REGION_ENABLE;
MPU_InitStruct. BaseAddress = 0x38000000 ;
MPU_InitStruct. Size = ARM_MPU_REGION_SIZE_64KB;
MPU_InitStruct. AccessPermission = MPU_REGION_FULL_ACCESS;
MPU_InitStruct. IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
MPU_InitStruct. IsCacheable = MPU_ACCESS_CACHEABLE;
MPU_InitStruct. IsShareable = MPU_ACCESS_NOT_SHAREABLE;
MPU_InitStruct. Number = MPU_REGION_NUMBER2;
MPU_InitStruct. TypeExtField = MPU_TEX_LEVEL0;
MPU_InitStruct. SubRegionDisable = 0x00 ;
MPU_InitStruct. DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
HAL_MPU_ConfigRegion ( & MPU_InitStruct) ;
# elif defined ( __CC_ARM ) ALIGN_32BYTES ( __attribute__ ( ( section ( ".RAM_D3" ) ) ) uint32_t IO_Toggle[ 8 ] ) = { 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , } ;
ALIGN_32BYTES ( __attribute__ ( ( section ( ".RAM_D3" ) ) ) uint32_t IO_Toggle1[ 8 ] ) = { 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , 0x00000002U , 0x00020000U , } ;
# endif void bsp_InitTimDMA ( void )
{ GPIO_InitTypeDef GPIO_InitStruct; DMA_HandleTypeDef DMA_Handle = { 0 } ; HAL_DMA_MuxRequestGeneratorConfigTypeDef dmamux_ReqGenParams = { 0 } ; __HAL_RCC_GPIOB_CLK_ENABLE ( ) ; GPIO_InitStruct. Pin = GPIO_PIN_1; GPIO_InitStruct. Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct. Pull = GPIO_NOPULL; GPIO_InitStruct. Speed = GPIO_SPEED_FREQ_VERY_HIGH; HAL_GPIO_Init ( GPIOB, & GPIO_InitStruct) ; __HAL_RCC_DMA1_CLK_ENABLE ( ) ; DMA_Handle. Instance = DMA1_Stream1; DMA_Handle. Init. Request = DMA_REQUEST_GENERATOR0; DMA_Handle. Init. Direction = DMA_MEMORY_TO_PERIPH; DMA_Handle. Init. PeriphInc = DMA_PINC_DISABLE; DMA_Handle. Init. MemInc = DMA_MINC_ENABLE; DMA_Handle. Init. PeriphDataAlignment = DMA_PDATAALIGN_WORD; DMA_Handle. Init. MemDataAlignment = DMA_MDATAALIGN_WORD; DMA_Handle. Init. Mode = DMA_CIRCULAR; DMA_Handle. Init. Priority = DMA_PRIORITY_LOW; DMA_Handle. Init. FIFOMode = DMA_FIFOMODE_DISABLE; DMA_Handle. Init. FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; DMA_Handle. Init. MemBurst = DMA_MBURST_SINGLE; DMA_Handle. Init. PeriphBurst = DMA_PBURST_SINGLE; if ( HAL_DMA_Init ( & DMA_Handle) != HAL_OK) { Error_Handler ( __FILE__ , __LINE__ ) ; } HAL_NVIC_SetPriority ( DMA1_Stream1_IRQn, 2 , 0 ) ; HAL_NVIC_EnableIRQ ( DMA1_Stream1_IRQn) ; dmamux_ReqGenParams. SignalID = HAL_DMAMUX1_REQ_GEN_TIM12_TRGO; dmamux_ReqGenParams. Polarity = HAL_DMAMUX_REQ_GEN_RISING; dmamux_ReqGenParams. RequestNumber = 1 ; HAL_DMAEx_ConfigMuxRequestGenerator ( & DMA_Handle, & dmamux_ReqGenParams) ; HAL_DMAEx_EnableMuxRequestGenerator ( & DMA_Handle) ; HAL_DMAEx_MultiBufferStart_IT ( & DMA_Handle, ( uint32_t ) IO_Toggle, ( uint32_t ) & GPIOB-> BSRRL, ( uint32_t ) IO_Toggle1, 8 ) ; TIM12_Config ( 0 ) ;
}
void TIM12_Config ( uint8_t _Mode)
{ TIM_HandleTypeDef htim = { 0 } ; TIM_MasterConfigTypeDef sMasterConfig = { 0 } ; TIM_OC_InitTypeDef sConfig = { 0 } ; uint32_t Period[ 2 ] = { 1999 , 19999 } ; uint32_t Pulse[ 2 ] = { 999 , 9999 } ; __HAL_RCC_TIM12_CLK_ENABLE ( ) ; HAL_TIM_Base_DeInit ( & htim) ; htim. Instance = TIM12; htim. Init. Period = Period[ _Mode] ; htim. Init. Prescaler = 0 ; htim. Init. ClockDivision = 0 ; htim. Init. CounterMode = TIM_COUNTERMODE_UP; htim. Init. RepetitionCounter = 0 ; HAL_TIM_Base_Init ( & htim) ; sConfig. OCMode = TIM_OCMODE_PWM1; sConfig. OCPolarity = TIM_OCPOLARITY_LOW; sConfig. Pulse = Pulse[ _Mode] ; if ( HAL_TIM_OC_ConfigChannel ( & htim, & sConfig, TIM_CHANNEL_1) != HAL_OK) { Error_Handler ( __FILE__ , __LINE__ ) ; } if ( HAL_TIM_OC_Start ( & htim, TIM_CHANNEL_1) != HAL_OK) { Error_Handler ( __FILE__ , __LINE__ ) ; } sMasterConfig. MasterOutputTrigger = TIM_TRGO_OC1REF; sMasterConfig. MasterOutputTrigger2 = TIM_TRGO2_RESET; sMasterConfig. MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; HAL_TIMEx_MasterConfigSynchronization ( & htim, & sMasterConfig) ;
}
