| /** |
| ****************************************************************************** |
| * @file stm32l4xx_ll_dma.c |
| * @author MCD Application Team |
| * @brief DMA LL module driver. |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2017 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file |
| * in the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| */ |
| #if defined(USE_FULL_LL_DRIVER) |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l4xx_ll_dma.h" |
| #include "stm32l4xx_ll_bus.h" |
| #ifdef USE_FULL_ASSERT |
| #include "stm32_assert.h" |
| #else |
| #define assert_param(expr) ((void)0U) |
| #endif |
| |
| /** @addtogroup STM32L4xx_LL_Driver |
| * @{ |
| */ |
| |
| #if defined (DMA1) || defined (DMA2) |
| |
| /** @defgroup DMA_LL DMA |
| * @{ |
| */ |
| |
| /* Private types -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| /* Private constants ---------------------------------------------------------*/ |
| /* Private macros ------------------------------------------------------------*/ |
| /** @addtogroup DMA_LL_Private_Macros |
| * @{ |
| */ |
| #define IS_LL_DMA_DIRECTION(__VALUE__) (((__VALUE__) == LL_DMA_DIRECTION_PERIPH_TO_MEMORY) || \ |
| ((__VALUE__) == LL_DMA_DIRECTION_MEMORY_TO_PERIPH) || \ |
| ((__VALUE__) == LL_DMA_DIRECTION_MEMORY_TO_MEMORY)) |
| |
| #define IS_LL_DMA_MODE(__VALUE__) (((__VALUE__) == LL_DMA_MODE_NORMAL) || \ |
| ((__VALUE__) == LL_DMA_MODE_CIRCULAR)) |
| |
| #define IS_LL_DMA_PERIPHINCMODE(__VALUE__) (((__VALUE__) == LL_DMA_PERIPH_INCREMENT) || \ |
| ((__VALUE__) == LL_DMA_PERIPH_NOINCREMENT)) |
| |
| #define IS_LL_DMA_MEMORYINCMODE(__VALUE__) (((__VALUE__) == LL_DMA_MEMORY_INCREMENT) || \ |
| ((__VALUE__) == LL_DMA_MEMORY_NOINCREMENT)) |
| |
| #define IS_LL_DMA_PERIPHDATASIZE(__VALUE__) (((__VALUE__) == LL_DMA_PDATAALIGN_BYTE) || \ |
| ((__VALUE__) == LL_DMA_PDATAALIGN_HALFWORD) || \ |
| ((__VALUE__) == LL_DMA_PDATAALIGN_WORD)) |
| |
| #define IS_LL_DMA_MEMORYDATASIZE(__VALUE__) (((__VALUE__) == LL_DMA_MDATAALIGN_BYTE) || \ |
| ((__VALUE__) == LL_DMA_MDATAALIGN_HALFWORD) || \ |
| ((__VALUE__) == LL_DMA_MDATAALIGN_WORD)) |
| |
| #define IS_LL_DMA_NBDATA(__VALUE__) ((__VALUE__) <= 0x0000FFFFU) |
| |
| #if defined(DMAMUX1) |
| #define IS_LL_DMA_PERIPHREQUEST(__VALUE__) ((__VALUE__) <= 93U) |
| #else |
| #define IS_LL_DMA_PERIPHREQUEST(__VALUE__) (((__VALUE__) == LL_DMA_REQUEST_0) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_1) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_2) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_3) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_4) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_5) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_6) || \ |
| ((__VALUE__) == LL_DMA_REQUEST_7)) |
| #endif /* DMAMUX1 */ |
| |
| #define IS_LL_DMA_PRIORITY(__VALUE__) (((__VALUE__) == LL_DMA_PRIORITY_LOW) || \ |
| ((__VALUE__) == LL_DMA_PRIORITY_MEDIUM) || \ |
| ((__VALUE__) == LL_DMA_PRIORITY_HIGH) || \ |
| ((__VALUE__) == LL_DMA_PRIORITY_VERYHIGH)) |
| |
| #if defined (DMA2) |
| #if defined (DMA2_Channel6) && defined (DMA2_Channel7) |
| #define IS_LL_DMA_ALL_CHANNEL_INSTANCE(INSTANCE, CHANNEL) ((((INSTANCE) == DMA1) && \ |
| (((CHANNEL) == LL_DMA_CHANNEL_1) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_2) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_3) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_4) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_5) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_6) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_7))) || \ |
| (((INSTANCE) == DMA2) && \ |
| (((CHANNEL) == LL_DMA_CHANNEL_1) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_2) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_3) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_4) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_5) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_6) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_7)))) |
| #else |
| #define IS_LL_DMA_ALL_CHANNEL_INSTANCE(INSTANCE, CHANNEL) ((((INSTANCE) == DMA1) && \ |
| (((CHANNEL) == LL_DMA_CHANNEL_1) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_2) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_3) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_4) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_5) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_6) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_7))) || \ |
| (((INSTANCE) == DMA2) && \ |
| (((CHANNEL) == LL_DMA_CHANNEL_1) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_2) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_3) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_4) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_5)))) |
| #endif |
| #else |
| #define IS_LL_DMA_ALL_CHANNEL_INSTANCE(INSTANCE, CHANNEL) ((((INSTANCE) == DMA1) && \ |
| (((CHANNEL) == LL_DMA_CHANNEL_1)|| \ |
| ((CHANNEL) == LL_DMA_CHANNEL_2) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_3) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_4) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_5) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_6) || \ |
| ((CHANNEL) == LL_DMA_CHANNEL_7)))) |
| #endif |
| /** |
| * @} |
| */ |
| |
| /* Private function prototypes -----------------------------------------------*/ |
| |
| /* Exported functions --------------------------------------------------------*/ |
| /** @addtogroup DMA_LL_Exported_Functions |
| * @{ |
| */ |
| |
| /** @addtogroup DMA_LL_EF_Init |
| * @{ |
| */ |
| |
| /** |
| * @brief De-initialize the DMA registers to their default reset values. |
| * @param DMAx DMAx Instance |
| * @param Channel This parameter can be one of the following values: |
| * @arg @ref LL_DMA_CHANNEL_1 |
| * @arg @ref LL_DMA_CHANNEL_2 |
| * @arg @ref LL_DMA_CHANNEL_3 |
| * @arg @ref LL_DMA_CHANNEL_4 |
| * @arg @ref LL_DMA_CHANNEL_5 |
| * @arg @ref LL_DMA_CHANNEL_6 |
| * @arg @ref LL_DMA_CHANNEL_7 |
| * @arg @ref LL_DMA_CHANNEL_ALL |
| * @retval An ErrorStatus enumeration value: |
| * - SUCCESS: DMA registers are de-initialized |
| * - ERROR: DMA registers are not de-initialized |
| */ |
| ErrorStatus LL_DMA_DeInit(DMA_TypeDef *DMAx, uint32_t Channel) |
| { |
| ErrorStatus status = SUCCESS; |
| DMA_Channel_TypeDef *tmp; |
| |
| /* Check the DMA Instance DMAx and Channel parameters*/ |
| assert_param(IS_LL_DMA_ALL_CHANNEL_INSTANCE(DMAx, Channel) || (Channel == LL_DMA_CHANNEL_ALL)); |
| |
| if (Channel == LL_DMA_CHANNEL_ALL) |
| { |
| if (DMAx == DMA1) |
| { |
| /* Force reset of DMA clock */ |
| LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_DMA1); |
| |
| /* Release reset of DMA clock */ |
| LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_DMA1); |
| } |
| #if defined(DMA2) |
| else if (DMAx == DMA2) |
| { |
| /* Force reset of DMA clock */ |
| LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_DMA2); |
| |
| /* Release reset of DMA clock */ |
| LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_DMA2); |
| } |
| #endif |
| else |
| { |
| status = ERROR; |
| } |
| } |
| else |
| { |
| tmp = (DMA_Channel_TypeDef *)(__LL_DMA_GET_CHANNEL_INSTANCE(DMAx, Channel)); |
| |
| /* Disable the selected DMAx_Channely */ |
| CLEAR_BIT(tmp->CCR, DMA_CCR_EN); |
| |
| /* Reset DMAx_Channely control register */ |
| WRITE_REG(tmp->CCR, 0U); |
| |
| /* Reset DMAx_Channely remaining bytes register */ |
| WRITE_REG(tmp->CNDTR, 0U); |
| |
| /* Reset DMAx_Channely peripheral address register */ |
| WRITE_REG(tmp->CPAR, 0U); |
| |
| /* Reset DMAx_Channely memory 0 address register */ |
| WRITE_REG(tmp->CMAR, 0U); |
| |
| #if defined(DMAMUX1) |
| /* Reset Request register field for DMAx Channel */ |
| LL_DMA_SetPeriphRequest(DMAx, Channel, LL_DMAMUX_REQ_MEM2MEM); |
| #else |
| /* Reset Request register field for DMAx Channel */ |
| LL_DMA_SetPeriphRequest(DMAx, Channel, LL_DMA_REQUEST_0); |
| #endif /* DMAMUX1 */ |
| |
| if (Channel == LL_DMA_CHANNEL_1) |
| { |
| /* Reset interrupt pending bits for DMAx Channel1 */ |
| LL_DMA_ClearFlag_GI1(DMAx); |
| } |
| else if (Channel == LL_DMA_CHANNEL_2) |
| { |
| /* Reset interrupt pending bits for DMAx Channel2 */ |
| LL_DMA_ClearFlag_GI2(DMAx); |
| } |
| else if (Channel == LL_DMA_CHANNEL_3) |
| { |
| /* Reset interrupt pending bits for DMAx Channel3 */ |
| LL_DMA_ClearFlag_GI3(DMAx); |
| } |
| else if (Channel == LL_DMA_CHANNEL_4) |
| { |
| /* Reset interrupt pending bits for DMAx Channel4 */ |
| LL_DMA_ClearFlag_GI4(DMAx); |
| } |
| else if (Channel == LL_DMA_CHANNEL_5) |
| { |
| /* Reset interrupt pending bits for DMAx Channel5 */ |
| LL_DMA_ClearFlag_GI5(DMAx); |
| } |
| |
| else if (Channel == LL_DMA_CHANNEL_6) |
| { |
| /* Reset interrupt pending bits for DMAx Channel6 */ |
| LL_DMA_ClearFlag_GI6(DMAx); |
| } |
| else if (Channel == LL_DMA_CHANNEL_7) |
| { |
| /* Reset interrupt pending bits for DMAx Channel7 */ |
| LL_DMA_ClearFlag_GI7(DMAx); |
| } |
| else |
| { |
| status = ERROR; |
| } |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Initialize the DMA registers according to the specified parameters in DMA_InitStruct. |
| * @note To convert DMAx_Channely Instance to DMAx Instance and Channely, use helper macros : |
| * @arg @ref __LL_DMA_GET_INSTANCE |
| * @arg @ref __LL_DMA_GET_CHANNEL |
| * @param DMAx DMAx Instance |
| * @param Channel This parameter can be one of the following values: |
| * @arg @ref LL_DMA_CHANNEL_1 |
| * @arg @ref LL_DMA_CHANNEL_2 |
| * @arg @ref LL_DMA_CHANNEL_3 |
| * @arg @ref LL_DMA_CHANNEL_4 |
| * @arg @ref LL_DMA_CHANNEL_5 |
| * @arg @ref LL_DMA_CHANNEL_6 |
| * @arg @ref LL_DMA_CHANNEL_7 |
| * @param DMA_InitStruct pointer to a @ref LL_DMA_InitTypeDef structure. |
| * @retval An ErrorStatus enumeration value: |
| * - SUCCESS: DMA registers are initialized |
| * - ERROR: Not applicable |
| */ |
| ErrorStatus LL_DMA_Init(DMA_TypeDef *DMAx, uint32_t Channel, LL_DMA_InitTypeDef *DMA_InitStruct) |
| { |
| /* Check the DMA Instance DMAx and Channel parameters*/ |
| assert_param(IS_LL_DMA_ALL_CHANNEL_INSTANCE(DMAx, Channel)); |
| |
| /* Check the DMA parameters from DMA_InitStruct */ |
| assert_param(IS_LL_DMA_DIRECTION(DMA_InitStruct->Direction)); |
| assert_param(IS_LL_DMA_MODE(DMA_InitStruct->Mode)); |
| assert_param(IS_LL_DMA_PERIPHINCMODE(DMA_InitStruct->PeriphOrM2MSrcIncMode)); |
| assert_param(IS_LL_DMA_MEMORYINCMODE(DMA_InitStruct->MemoryOrM2MDstIncMode)); |
| assert_param(IS_LL_DMA_PERIPHDATASIZE(DMA_InitStruct->PeriphOrM2MSrcDataSize)); |
| assert_param(IS_LL_DMA_MEMORYDATASIZE(DMA_InitStruct->MemoryOrM2MDstDataSize)); |
| assert_param(IS_LL_DMA_NBDATA(DMA_InitStruct->NbData)); |
| assert_param(IS_LL_DMA_PERIPHREQUEST(DMA_InitStruct->PeriphRequest)); |
| assert_param(IS_LL_DMA_PRIORITY(DMA_InitStruct->Priority)); |
| |
| /*---------------------------- DMAx CCR Configuration ------------------------ |
| * Configure DMAx_Channely: data transfer direction, data transfer mode, |
| * peripheral and memory increment mode, |
| * data size alignment and priority level with parameters : |
| * - Direction: DMA_CCR_DIR and DMA_CCR_MEM2MEM bits |
| * - Mode: DMA_CCR_CIRC bit |
| * - PeriphOrM2MSrcIncMode: DMA_CCR_PINC bit |
| * - MemoryOrM2MDstIncMode: DMA_CCR_MINC bit |
| * - PeriphOrM2MSrcDataSize: DMA_CCR_PSIZE[1:0] bits |
| * - MemoryOrM2MDstDataSize: DMA_CCR_MSIZE[1:0] bits |
| * - Priority: DMA_CCR_PL[1:0] bits |
| */ |
| LL_DMA_ConfigTransfer(DMAx, Channel, DMA_InitStruct->Direction | \ |
| DMA_InitStruct->Mode | \ |
| DMA_InitStruct->PeriphOrM2MSrcIncMode | \ |
| DMA_InitStruct->MemoryOrM2MDstIncMode | \ |
| DMA_InitStruct->PeriphOrM2MSrcDataSize | \ |
| DMA_InitStruct->MemoryOrM2MDstDataSize | \ |
| DMA_InitStruct->Priority); |
| |
| /*-------------------------- DMAx CMAR Configuration ------------------------- |
| * Configure the memory or destination base address with parameter : |
| * - MemoryOrM2MDstAddress: DMA_CMAR_MA[31:0] bits |
| */ |
| LL_DMA_SetMemoryAddress(DMAx, Channel, DMA_InitStruct->MemoryOrM2MDstAddress); |
| |
| /*-------------------------- DMAx CPAR Configuration ------------------------- |
| * Configure the peripheral or source base address with parameter : |
| * - PeriphOrM2MSrcAddress: DMA_CPAR_PA[31:0] bits |
| */ |
| LL_DMA_SetPeriphAddress(DMAx, Channel, DMA_InitStruct->PeriphOrM2MSrcAddress); |
| |
| /*--------------------------- DMAx CNDTR Configuration ----------------------- |
| * Configure the peripheral base address with parameter : |
| * - NbData: DMA_CNDTR_NDT[15:0] bits |
| */ |
| LL_DMA_SetDataLength(DMAx, Channel, DMA_InitStruct->NbData); |
| |
| #if defined(DMAMUX1) |
| /*--------------------------- DMAMUXx CCR Configuration ---------------------- |
| * Configure the DMA request for DMA Channels on DMAMUX Channel x with parameter : |
| * - PeriphRequest: DMA_CxCR[7:0] bits |
| */ |
| LL_DMA_SetPeriphRequest(DMAx, Channel, DMA_InitStruct->PeriphRequest); |
| #else |
| /*--------------------------- DMAx CSELR Configuration ----------------------- |
| * Configure the DMA request for DMA instance on Channel x with parameter : |
| * - PeriphRequest: DMA_CSELR[31:0] bits |
| */ |
| LL_DMA_SetPeriphRequest(DMAx, Channel, DMA_InitStruct->PeriphRequest); |
| #endif /* DMAMUX1 */ |
| |
| return SUCCESS; |
| } |
| |
| /** |
| * @brief Set each @ref LL_DMA_InitTypeDef field to default value. |
| * @param DMA_InitStruct Pointer to a @ref LL_DMA_InitTypeDef structure. |
| * @retval None |
| */ |
| void LL_DMA_StructInit(LL_DMA_InitTypeDef *DMA_InitStruct) |
| { |
| /* Set DMA_InitStruct fields to default values */ |
| DMA_InitStruct->PeriphOrM2MSrcAddress = 0x00000000U; |
| DMA_InitStruct->MemoryOrM2MDstAddress = 0x00000000U; |
| DMA_InitStruct->Direction = LL_DMA_DIRECTION_PERIPH_TO_MEMORY; |
| DMA_InitStruct->Mode = LL_DMA_MODE_NORMAL; |
| DMA_InitStruct->PeriphOrM2MSrcIncMode = LL_DMA_PERIPH_NOINCREMENT; |
| DMA_InitStruct->MemoryOrM2MDstIncMode = LL_DMA_MEMORY_NOINCREMENT; |
| DMA_InitStruct->PeriphOrM2MSrcDataSize = LL_DMA_PDATAALIGN_BYTE; |
| DMA_InitStruct->MemoryOrM2MDstDataSize = LL_DMA_MDATAALIGN_BYTE; |
| DMA_InitStruct->NbData = 0x00000000U; |
| #if defined(DMAMUX1) |
| DMA_InitStruct->PeriphRequest = LL_DMAMUX_REQ_MEM2MEM; |
| #else |
| DMA_InitStruct->PeriphRequest = LL_DMA_REQUEST_0; |
| #endif /* DMAMUX1 */ |
| DMA_InitStruct->Priority = LL_DMA_PRIORITY_LOW; |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* DMA1 || DMA2 */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* USE_FULL_LL_DRIVER */ |
