本帖最后由 51heisex 于 2016-1-23 03:03 編輯
各個寄存器作用1) DMA_CPARx或DMA_CMARx寄存器指定外設(shè)基地址或存儲器單元 2) 執(zhí)行一次DMA_CNDTRx寄存器的遞減操作，該寄存器包含未完成的操作數(shù)目。 3) 每個通道的優(yōu)先權(quán)可以在DMA_CCRx寄存器中設(shè)置，有4個等級 4) 外設(shè)和存儲器的傳輸數(shù)據(jù)量可以通過DMA_CCRx寄存器中的PSIZE和MSIZE位編程。 5) 通過設(shè)置DMA_CCRx寄存器中的PINC和MINC標志位，外設(shè)和存儲器的指針在每次傳輸后可以有選擇地完成自動增量 6) 當(dāng)傳輸一半的數(shù)據(jù)后，半傳輸標志(HTIF)被置1，當(dāng)設(shè)置了允許半傳輸中斷位(HTIE)時，將產(chǎn)生一個中斷請求。在數(shù)據(jù)傳輸結(jié)束后，傳輸完成標志(TCIF)被置1，當(dāng)設(shè)置了允許傳輸完成中斷位(TCIE)時，將產(chǎn)生一個中斷請求。 7) 當(dāng)在DMA讀寫操作時發(fā)生DMA傳輸錯誤時，硬件會自動地清除發(fā)生錯誤的通道所對應(yīng)的通道配置寄存器(DMA_CCRx)的EN位，該通道操作被停止。此時，在DMA_IFR寄存器中對應(yīng)該通道的傳輸錯誤中斷標志位(TEIF)將被置位，如果在DMA_CCRx寄存器中設(shè)置了傳輸錯誤中斷允許位，則將產(chǎn)生中斷。 8) 每個DMA通道都可以在DMA傳輸過半、傳輸完成和傳輸錯誤時產(chǎn)生中斷 
9) DMA1控制器從外設(shè)(TIMx[x=1、2、3、4]、ADC1、SPI1、SPI/I2S2、I2Cx[x=1、2]和USARTx[x=1、2、3])產(chǎn)生的7個請求，通過邏輯或輸入到DMA1控制器 10) DMA2控制器從外設(shè)(TIMx[5、6、7、8]、ADC3、SPI/I2S3、UART4、DAC通道1、2和SDIO)產(chǎn)生的5個請求，經(jīng)邏輯或輸入到DMA2控制器 DMA通道配置過程配置DMA通道x的過程(x代表通道號)： 1.在DMA_CPARx寄存器中設(shè)置外設(shè)寄存器的地址。發(fā)生外設(shè)數(shù)據(jù)傳輸請求時，這個地址將是數(shù)據(jù)傳輸?shù)脑椿蚰繕恕?.在DMA_CMARx寄存器中設(shè)置數(shù)據(jù)存儲器的地址。發(fā)生外設(shè)數(shù)據(jù)傳輸請求時，傳輸?shù)臄?shù)據(jù)將從這個地址讀出或?qū)懭脒@個地址。3.在DMA_CNDTRx寄存器中設(shè)置要傳輸?shù)臄?shù)據(jù)量。在每個數(shù)據(jù)傳輸后，這個數(shù)值遞減。4.在DMA_CCRx寄存器的PL[1:0]位中設(shè)置通道的優(yōu)先級。5.在DMA_CCRx寄存器中設(shè)置數(shù)據(jù)傳輸?shù)姆较颉⒀h(huán)模式、外設(shè)和存儲器的增量模式、外設(shè)和存儲器的數(shù)據(jù)寬度、傳輸一半產(chǎn)生中斷或傳輸完成產(chǎn)生中斷。6.設(shè)置DMA_CCRx寄存器的ENABLE位，啟動該通道。
DMA寄存器1）DMA中斷狀態(tài)寄存器(DMA_ISR) TEIFx：通道x的傳輸錯誤標志(x = 1 … 7) (Channel xtransfererror flag) HTIFx：通道x的半傳輸標志(x = 1 … 7) (Channel x halftransferflag) TCIFx：通道x的傳輸完成標志(x = 1 … 7) (Channel xtransfercomplete flag) GIFx：通道x的全局中斷標志(x = 1 … 7) (Channel xglobalinterrupt flag) 2）DMA中斷標志清除寄存器(DMA_IFCR) CTEIFx：清除通道x的傳輸錯誤標志(x = 1 … 7) (Channel xtransfererror clear) CHTIFx：清除通道x的半傳輸標志(x = 1 … 7) (Channel xhalftransfer clear) CTCIFx：清除通道x的傳輸完成標志(x = 1 … 7) (Channel xtransfercomplete clear) CGIFx：清除通道x的全局中斷標志(x = 1 … 7) (Channel xglobalinterrupt clear) 3）DMA通道x配置寄存器(DMA_CCRx)(x= 1…7) 位14 ：MEM2MEM：存儲器到存儲器模式 (Memory to memory mode) 位13:12 ：PL[1:0]：通道優(yōu)先級 (Channel priority level) MSIZE[1:0]：存儲器數(shù)據(jù)寬度 (Memory size) PSIZE[1:0]：外設(shè)數(shù)據(jù)寬度 (Peripheral size) MINC：存儲器地址增量模式 (Memory increment mode) PINC：外設(shè)地址增量模式 (Peripheral increment mode) CIRC：循環(huán)模式 (Circular mode) DIR：數(shù)據(jù)傳輸方向 (Data transfer direction) TEIE：允許傳輸錯誤中斷 (Transfer error interruptenable) HTIE：允許半傳輸中斷 (Half transfer interruptenable) TCIE：允許傳輸完成中斷 (Transfer completeinterruptenable) EN：通道開啟 (Channel enable) 4）DMA通道x傳輸數(shù)量寄存器(DMA_CNDTRx)(x= 1…7) 位15:0 ：NDT[15:0]：數(shù)據(jù)傳輸數(shù)量 (Number of data totransfer) 5）DMA通道x外設(shè)地址寄存器(DMA_CPARx)(x= 1…7) （當(dāng)開啟通道(DMA_CCRx的EN=1)時不能寫該寄存器） PA[31:0]：外設(shè)地址 (Peripheral address) 當(dāng)PSIZE=’01’(16位)，不使用PA[0]位。操作自動地與半字地址對齊。當(dāng)PSIZE=’10’(32位)，不使用PA[1:0]位。操作自動地與字地址對齊。 6）DMA通道x存儲器地址寄存器(DMA_CMARx)(x= 1…7) （當(dāng)開啟通道(DMA_CCRx的EN=1)時不能寫該寄存器） MA[31:0]：存儲器地址 DMA寄存器映像
DMA庫函數(shù)解析 stm32f10x_dma.c #include"stm32f10x_dma.h" #include"stm32f10x_rcc.h" #defineDMAy_Channelx_IT_Mask //定義了各個通道的中斷mask. #defineFLAG_Mask ((uint32_t)0x10000000) //與DMAy_IT或DMAy_FLAG相與 來判斷是DMA1還是DMA2 #defineCCR_CLEAR_Mask //定義了CCR寄存器的清除mask用來在默認設(shè)置中清除相應(yīng)位 void DMA_DeInit(DMA_Channel_TypeDef* DMAy_Channelx) // DMAy_Channelx默認初始化 //復(fù)位各個寄存器的，并關(guān)DMAy_Channelx中斷 void DMA_Init(DMA_Channel_TypeDef* DMAy_Channelx,DMA_InitTypeDef* DMA_InitStruct) //檢查各個實參正確與否 //將DMAy_Channelx中的MEM2MEM, PL, MSIZE, PSIZE,MINC, PINC, CIRC andDIR清除（CCR_CLEAR_Mask） //將DMA_InitStruct中的參數(shù)“或”到CCR寄存器 //將DMA_InitStruct中的參數(shù)寫入CNDTR寄存器、CPAR寄存器、CMAR寄存器 void DMA_StructInit(DMA_InitTypeDef*DMA_InitStruct) //DMA_InitStruct填寫默認值，可以快速初始化此結(jié)構(gòu)體 void DMA_Cmd(DMA_Channel_TypeDef*DMAy_Channelx, FunctionalState NewState) //使能與關(guān)閉指令 //先檢查兩個入口實參是否正確 //然后根據(jù)NewState參數(shù) 修改NewState void DMA_ITConfig(DMA_Channel_TypeDef*DMAy_Channelx, uint32_t DMA_IT,FunctionalState NewState) //DMA中斷配置 //檢查入口實參正確性 //3種中斷，用DMAy_Channelx->CCR中的3個位來控制開關(guān) void DMA_SetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx,uint16_tDataNumber) //設(shè)置DMAy_Channelx傳輸數(shù)量寄存器 //檢查入口實參正確性 // DMAy_Channelx->CNDTR = DataNumber uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef*DMAy_Channelx) //返回DMAy_Channelx傳輸數(shù)量寄存器的值 //檢查入口實參正確性 // return ((uint16_t)(DMAy_Channelx->CNDTR)); FlagStatusDMA_GetFlagStatus(uint32_t DMAy_FLAG) //獲取DMAy_FLAG 即： DMA1_FLAG_GL1: DMA1Channel1 global flag. DMA1_FLAG_TC1: DMA1Channel1 transfer complete flag. DMA1_FLAG_HT1: DMA1Channel1 half transfer flag. DMA1_FLAG_TE1: DMA1Channel1 transfer error flag. 等狀態(tài)。 //首先驗證DMAy_FLAG正確性 //根據(jù)DMAy_FLAG& FLAG_Mask 的值來判斷相應(yīng)位的值位0還是1 如DMA1_FLAG_GL1& FLAG_Mask= ((uint32_t)0x00000001)&((uint32_t)0x10000000) = ((uint32_t)0x00000000) 說明是DMA1的DMAy_FLAG。 如DMA2_FLAG_GL1& FLAG_Mask= ((uint32_t)0x10000001)&((uint32_t)0x10000000) = ((uint32_t)0x10000000)!=0 說明是DMA2的DMAy_FLAG。 //將DMAy的中斷狀態(tài)寄存器與DMAy_FLAG相與，如果為0則說明相應(yīng)位為0， 說明狀態(tài)為RESET，反之為SET。并返回該狀態(tài) void DMA_ClearFlag(uint32_tDMAy_FLAG) //清除DMAy_FLAG對應(yīng)位， //首先驗證DMAy_FLAG正確性 // 根據(jù)(DMAy_FLAG & FLAG_Mask)判斷是DMA1還是DMA2 //然后將DMAy->IFCR = DMAy_FLAG 清除相應(yīng)位 ITStatus DMA_GetITStatus(uint32_tDMAy_IT) //判斷DMAy Channelx的某種中斷是否發(fā)生了 DMAy_IT的值類似如下 DMA1_IT_GL1: DMA1 Channel1 global interrupt.((uint32_t)0x00000001) DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt.((uint32_t)0x00000002) DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt.((uint32_t)0x00000004) DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt.((uint32_t)0x00000008) //首先驗證DMAy_IT正確性 //根據(jù)(DMAy_IT & FLAG_Mask)判斷是DMA1還是DMA2 // (DMAy->ISR & DMAy_IT)判斷對應(yīng)位的值，從而判斷中斷發(fā)生與否 void DMA_ClearITPendingBit(uint32_tDMAy_IT) //清除DMAy Channelx中斷標志 DMAy_IT的值類似如下 DMA1_IT_GL1: DMA1 Channel1 global interrupt.((uint32_t)0x00000001) DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt.((uint32_t)0x00000002) DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt.((uint32_t)0x00000004) DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt.((uint32_t)0x00000008) //首先驗證DMAy_IT正確性 // DMAy_IT & FLAG_Mask來判斷DMA1還是DMA2 //DMA1->IFCR = DMAy_IT來清除對應(yīng)位 stm32f10x_dma.h 定義函數(shù)原型、結(jié)構(gòu)體、宏定義 //避免重定義 #ifndef __STM32F10x_DMA_H #define __STM32F10x_DMA_H #include "stm32f10x.h" typedef struct { 外設(shè)地址 存儲器地址 方向 數(shù)據(jù)大小 模式等等 }DMA_InitTypeDef; #define IS_DMA_ALL_PERIPH(PERIPH) (((PERIPH) ==DMA1_Channel1) || \ ((PERIPH) ==DMA1_Channel2) || \ ··········//判斷是否為DMA通道（格式檢查） #defineDMA_DIR_PeripheralDST ((uint32_t)0x00000010)//因為DIR在DMA_CCRx第四位 #defineDMA_DIR_PeripheralSRC ((uint32_t)0x00000000) #define IS_DMA_DIR(DIR) (((DIR)==DMA_DIR_PeripheralDST) || \ ((DIR) ==DMA_DIR_PeripheralSRC))//檢查DIR參數(shù)輸入格式 //后面斜體灰字部分與上邊驗證DIR同理 #defineDMA_PeripheralInc_Enable ((uint32_t)0x00000040) #defineDMA_PeripheralInc_Disable ((uint32_t)0x00000000) #defineIS_DMA_PERIPHERAL_INC_STATE(STATE) (((STATE)== DMA_PeripheralInc_Enable) || \ ((STATE)== DMA_PeripheralInc_Disable)) #defineDMA_MemoryInc_Enable ((uint32_t)0x00000080) #defineDMA_MemoryInc_Disable ((uint32_t)0x00000000) #defineIS_DMA_MEMORY_INC_STATE(STATE) (((STATE) ==DMA_MemoryInc_Enable) || \ ((STATE)== DMA_MemoryInc_Disable)) #defineDMA_PeripheralDataSize_Byte ((uint32_t)0x00000000) #defineDMA_PeripheralDataSize_HalfWord ((uint32_t)0x00000100) #defineDMA_PeripheralDataSize_Word ((uint32_t)0x00000200) #defineIS_DMA_PERIPHERAL_DATA_SIZE(SIZE) (((SIZE) ==DMA_PeripheralDataSize_Byte) || \ ((SIZE)== DMA_PeripheralDataSize_HalfWord) || \ ((SIZE)== DMA_PeripheralDataSize_Word)) #defineDMA_MemoryDataSize_Byte ((uint32_t)0x00000000) #defineDMA_MemoryDataSize_HalfWord ((uint32_t)0x00000400) #defineDMA_MemoryDataSize_Word ((uint32_t)0x00000800) #defineIS_DMA_MEMORY_DATA_SIZE(SIZE)(((SIZE) == DMA_MemoryDataSize_Byte) || \ ((SIZE)==DMA_MemoryDataSize_HalfWord) || \ ((SIZE)==DMA_MemoryDataSize_Word)) #defineDMA_Mode_Circular ((uint32_t)0x00000020) #defineDMA_Mode_Normal ((uint32_t)0x00000000) #defineIS_DMA_MODE(MODE) (((MODE) ==DMA_Mode_Circular) || ((MODE) ==DMA_Mode_Normal)) #defineDMA_Priority_VeryHigh ((uint32_t)0x00003000) #defineDMA_Priority_High ((uint32_t)0x00002000) #defineDMA_Priority_Medium ((uint32_t)0x00001000) #defineDMA_Priority_Low ((uint32_t)0x00000000) #defineIS_DMA_PRIORITY(PRIORITY)(((PRIORITY) == DMA_Priority_VeryHigh) || \ ((PRIORITY)==DMA_Priority_High) || \ ((PRIORITY)==DMA_Priority_Medium) || \ ((PRIORITY)==DMA_Priority_Low)) #defineDMA_M2M_Enable ((uint32_t)0x00004000) #defineDMA_M2M_Disable ((uint32_t)0x00000000) #defineIS_DMA_M2M_STATE(STATE)(((STATE) == DMA_M2M_Enable) || ((STATE)==DMA_M2M_Disable)) // DMA_ITConfig（）函數(shù)中中斷方式配置 #defineDMA_IT_TC ((uint32_t)0x00000002) #defineDMA_IT_HT ((uint32_t)0x00000004) #defineDMA_IT_TE ((uint32_t)0x00000008) #defineIS_DMA_CONFIG_IT(IT) ((((IT) & 0xFFFFFFF1) == 0x00)&& ((IT) !=0x00)) //中斷狀態(tài)寄存器和中斷清除寄存器各個位 #defineDMA1_IT_GL1 ((uint32_t)0x00000001) #defineDMA1_IT_TC1 ((uint32_t)0x00000002) #defineDMA1_IT_HT1 ((uint32_t)0x00000004) #defineDMA1_IT_TE1 ((uint32_t)0x00000008) #defineDMA1_IT_GL2 ((uint32_t)0x00000010) #defineDMA1_IT_TC2 ((uint32_t)0x00000020) #defineDMA1_IT_HT2 ((uint32_t)0x00000040) #defineDMA1_IT_TE2 ((uint32_t)0x00000080) #defineDMA1_IT_GL3 ((uint32_t)0x00000100) #defineDMA1_IT_TC3 ((uint32_t)0x00000200) #defineDMA1_IT_HT3 ((uint32_t)0x00000400) #defineDMA1_IT_TE3 ((uint32_t)0x00000800) #defineDMA1_IT_GL4 ((uint32_t)0x00001000) #defineDMA1_IT_TC4 ((uint32_t)0x00002000) #defineDMA1_IT_HT4 ((uint32_t)0x00004000) #defineDMA1_IT_TE4 ((uint32_t)0x00008000) #defineDMA1_IT_GL5 ((uint32_t)0x00010000) #defineDMA1_IT_TC5 ((uint32_t)0x00020000) #defineDMA1_IT_HT5 ((uint32_t)0x00040000) #defineDMA1_IT_TE5 ((uint32_t)0x00080000) #defineDMA1_IT_GL6 ((uint32_t)0x00100000) #defineDMA1_IT_TC6 ((uint32_t)0x00200000) #defineDMA1_IT_HT6 ((uint32_t)0x00400000) #defineDMA1_IT_TE6 ((uint32_t)0x00800000) #defineDMA1_IT_GL7 ((uint32_t)0x01000000) #defineDMA1_IT_TC7 ((uint32_t)0x02000000) #defineDMA1_IT_HT7 ((uint32_t)0x04000000) #defineDMA1_IT_TE7 ((uint32_t)0x08000000) #defineDMA2_IT_GL1 ((uint32_t)0x10000001) #defineDMA2_IT_TC1 ((uint32_t)0x10000002) #defineDMA2_IT_HT1 ((uint32_t)0x10000004) #defineDMA2_IT_TE1 ((uint32_t)0x10000008) #defineDMA2_IT_GL2 ((uint32_t)0x10000010) #defineDMA2_IT_TC2 ((uint32_t)0x10000020) #defineDMA2_IT_HT2 ((uint32_t)0x10000040) #defineDMA2_IT_TE2 ((uint32_t)0x10000080) #defineDMA2_IT_GL3 ((uint32_t)0x10000100) #defineDMA2_IT_TC3 ((uint32_t)0x10000200) #defineDMA2_IT_HT3 ((uint32_t)0x10000400) #defineDMA2_IT_TE3 ((uint32_t)0x10000800) #defineDMA2_IT_GL4 ((uint32_t)0x10001000) #defineDMA2_IT_TC4 ((uint32_t)0x10002000) #defineDMA2_IT_HT4 ((uint32_t)0x10004000) #defineDMA2_IT_TE4 ((uint32_t)0x10008000) #defineDMA2_IT_GL5 ((uint32_t)0x10010000) #defineDMA2_IT_TC5 ((uint32_t)0x10020000) #defineDMA2_IT_HT5 ((uint32_t)0x10040000) #defineDMA2_IT_TE5 ((uint32_t)0x10080000) // DMA_ClearITPendingBit函數(shù)中判斷DMAy_IT是否格式正確——IT最高4位為0000或者0001并且IT不等于0——函數(shù)值的值是可以或組合，達到同時清除的目的。 #define IS_DMA_CLEAR_IT(IT) (((((IT) &0xF0000000)== 0x00) || (((IT) & 0xEFF00000) == 0x00))&& ((IT) != 0x00)) //判斷格式 #define IS_DMA_GET_IT(IT) (((IT) == DMA1_IT_GL1)||((IT) == DMA1_IT_TC1) || \ ((IT) ==DMA1_IT_HT1) || ((IT) == DMA1_IT_TE1) ||\ ((IT) ==DMA1_IT_GL2) || ((IT) == DMA1_IT_TC2) ||\ ((IT) ==DMA1_IT_HT2) || ((IT) == DMA1_IT_TE2) ||\ ((IT) ==DMA1_IT_GL3) || ((IT) == DMA1_IT_TC3) ||\ ((IT)== DMA1_IT_HT3) ||((IT) == DMA1_IT_TE3) || \ ((IT) ==DMA1_IT_GL4) || ((IT) == DMA1_IT_TC4) ||\ ((IT) ==DMA1_IT_HT4) || ((IT) == DMA1_IT_TE4) ||\ ((IT) ==DMA1_IT_GL5) || ((IT) == DMA1_IT_TC5) ||\ ((IT) ==DMA1_IT_HT5) || ((IT) == DMA1_IT_TE5) ||\ ((IT) ==DMA1_IT_GL6) || ((IT) == DMA1_IT_TC6) ||\ ((IT)== DMA1_IT_HT6) ||((IT) == DMA1_IT_TE6) || \ ((IT) ==DMA1_IT_GL7) || ((IT) == DMA1_IT_TC7) ||\ ((IT) ==DMA1_IT_HT7) || ((IT) == DMA1_IT_TE7) ||\ ((IT) == DMA2_IT_GL1)|| ((IT) == DMA2_IT_TC1) ||\ ((IT) ==DMA2_IT_HT1) || ((IT) == DMA2_IT_TE1) ||\ ((IT) ==DMA2_IT_GL2) || ((IT) == DMA2_IT_TC2) ||\ ((IT) ==DMA2_IT_HT2) || ((IT) == DMA2_IT_TE2) ||\ ((IT) ==DMA2_IT_GL3) || ((IT) == DMA2_IT_TC3) ||\ ((IT) ==DMA2_IT_HT3) || ((IT) == DMA2_IT_TE3) ||\ ((IT) ==DMA2_IT_GL4) || ((IT) == DMA2_IT_TC4) ||\ ((IT) ==DMA2_IT_HT4) || ((IT) == DMA2_IT_TE4) ||\ ((IT) ==DMA2_IT_GL5) || ((IT) == DMA2_IT_TC5) ||\ ((IT) ==DMA2_IT_HT5) || ((IT) == DMA2_IT_TE5)) //中斷狀態(tài)位 #defineDMA1_FLAG_GL1 ((uint32_t)0x00000001) #defineDMA1_FLAG_TC1 ((uint32_t)0x00000002) #defineDMA1_FLAG_HT1 ((uint32_t)0x00000004) #defineDMA1_FLAG_TE1 ((uint32_t)0x00000008) #defineDMA1_FLAG_GL2 ((uint32_t)0x00000010) #defineDMA1_FLAG_TC2 ((uint32_t)0x00000020) #defineDMA1_FLAG_HT2 ((uint32_t)0x00000040) #defineDMA1_FLAG_TE2 ((uint32_t)0x00000080) #defineDMA1_FLAG_GL3 ((uint32_t)0x00000100) #defineDMA1_FLAG_TC3 ((uint32_t)0x00000200) #defineDMA1_FLAG_HT3 ((uint32_t)0x00000400) #defineDMA1_FLAG_TE3 ((uint32_t)0x00000800) #defineDMA1_FLAG_GL4 ((uint32_t)0x00001000) #defineDMA1_FLAG_TC4 ((uint32_t)0x00002000) #defineDMA1_FLAG_HT4 ((uint32_t)0x00004000) #defineDMA1_FLAG_TE4 ((uint32_t)0x00008000) #defineDMA1_FLAG_GL5 ((uint32_t)0x00010000) #defineDMA1_FLAG_TC5 ((uint32_t)0x00020000) #defineDMA1_FLAG_HT5 ((uint32_t)0x00040000) #defineDMA1_FLAG_TE5 ((uint32_t)0x00080000) #defineDMA1_FLAG_GL6 ((uint32_t)0x00100000) #defineDMA1_FLAG_TC6 ((uint32_t)0x00200000) #defineDMA1_FLAG_HT6 ((uint32_t)0x00400000) #defineDMA1_FLAG_TE6 ((uint32_t)0x00800000) #defineDMA1_FLAG_GL7 ((uint32_t)0x01000000) #defineDMA1_FLAG_TC7 ((uint32_t)0x02000000) #defineDMA1_FLAG_HT7 ((uint32_t)0x04000000) #defineDMA1_FLAG_TE7 ((uint32_t)0x08000000) #defineDMA2_FLAG_GL1 ((uint32_t)0x10000001) #defineDMA2_FLAG_TC1 ((uint32_t)0x10000002) #defineDMA2_FLAG_HT1 ((uint32_t)0x10000004) #defineDMA2_FLAG_TE1 ((uint32_t)0x10000008) #defineDMA2_FLAG_GL2 ((uint32_t)0x10000010) #defineDMA2_FLAG_TC2 ((uint32_t)0x10000020) #defineDMA2_FLAG_HT2 ((uint32_t)0x10000040) #defineDMA2_FLAG_TE2 ((uint32_t)0x10000080) #defineDMA2_FLAG_GL3 ((uint32_t)0x10000100) #defineDMA2_FLAG_TC3 ((uint32_t)0x10000200) #defineDMA2_FLAG_HT3 ((uint32_t)0x10000400) #defineDMA2_FLAG_TE3 ((uint32_t)0x10000800) #defineDMA2_FLAG_GL4 ((uint32_t)0x10001000) #defineDMA2_FLAG_TC4 ((uint32_t)0x10002000) #defineDMA2_FLAG_HT4 ((uint32_t)0x10004000) #defineDMA2_FLAG_TE4 ((uint32_t)0x10008000) #defineDMA2_FLAG_GL5 ((uint32_t)0x10010000) #defineDMA2_FLAG_TC5 ((uint32_t)0x10020000) #defineDMA2_FLAG_HT5 ((uint32_t)0x10040000) #defineDMA2_FLAG_TE5 ((uint32_t)0x10080000) //同上：#defineIS_DMA_CLEAR_IT(IT)中的定義——是否格式正確——IT最高4位為0000或者0001并且IT不等于0——函數(shù)值的值是可以或組合，達到同時清除的目的。 #define IS_DMA_CLEAR_FLAG(FLAG) (((((FLAG)&0xF0000000) == 0x00) || (((FLAG) & 0xEFF00000) == 0x00))&& ((FLAG)!= 0x00)) //格式檢查 #define IS_DMA_GET_FLAG(FLAG) (((FLAG) ==DMA1_FLAG_GL1)|| ((FLAG) == DMA1_FLAG_TC1) || \ ((FLAG) ==DMA1_FLAG_HT1) || ((FLAG) == DMA1_FLAG_TE1) ||\ ((FLAG) ==DMA1_FLAG_GL2) || ((FLAG) == DMA1_FLAG_TC2) ||\ ((FLAG) ==DMA1_FLAG_HT2) || ((FLAG) == DMA1_FLAG_TE2) ||\ ((FLAG) ==DMA1_FLAG_GL3) || ((FLAG) == DMA1_FLAG_TC3) ||\ ((FLAG) ==DMA1_FLAG_HT3) || ((FLAG) == DMA1_FLAG_TE3) ||\ ((FLAG) ==DMA1_FLAG_GL4) || ((FLAG) == DMA1_FLAG_TC4) ||\ ((FLAG) ==DMA1_FLAG_HT4) || ((FLAG) == DMA1_FLAG_TE4) ||\ ((FLAG) ==DMA1_FLAG_GL5) || ((FLAG) == DMA1_FLAG_TC5) ||\ ((FLAG) ==DMA1_FLAG_HT5) || ((FLAG) == DMA1_FLAG_TE5) ||\ ((FLAG) ==DMA1_FLAG_GL6) || ((FLAG) == DMA1_FLAG_TC6) ||\ ((FLAG) ==DMA1_FLAG_HT6) || ((FLAG) == DMA1_FLAG_TE6) ||\ ((FLAG) ==DMA1_FLAG_GL7) || ((FLAG) == DMA1_FLAG_TC7) ||\ ((FLAG)== DMA1_FLAG_HT7)|| ((FLAG) == DMA1_FLAG_TE7) ||\ ((FLAG) ==DMA2_FLAG_GL1) || ((FLAG) == DMA2_FLAG_TC1) ||\ ((FLAG) ==DMA2_FLAG_HT1) || ((FLAG) == DMA2_FLAG_TE1) ||\ ((FLAG) ==DMA2_FLAG_GL2) || ((FLAG) == DMA2_FLAG_TC2) ||\ ((FLAG) ==DMA2_FLAG_HT2) || ((FLAG) == DMA2_FLAG_TE2) ||\ ((FLAG) ==DMA2_FLAG_GL3) || ((FLAG) == DMA2_FLAG_TC3) ||\ ((FLAG) ==DMA2_FLAG_HT3) || ((FLAG) == DMA2_FLAG_TE3) ||\ ((FLAG) ==DMA2_FLAG_GL4) || ((FLAG) == DMA2_FLAG_TC4) ||\ ((FLAG) ==DMA2_FLAG_HT4) || ((FLAG) == DMA2_FLAG_TE4) ||\ ((FLAG) ==DMA2_FLAG_GL5) || ((FLAG) == DMA2_FLAG_TC5) ||\ ((FLAG) ==DMA2_FLAG_HT5) || ((FLAG) ==DMA2_FLAG_TE5)) //SIZE大小檢查 #define IS_DMA_BUFFER_SIZE(SIZE) (((SIZE) >=0x1)&& ((SIZE) < 0x10000)) //函數(shù)聲明 void DMA_DeInit(DMA_Channel_TypeDef*DMAy_Channelx); void DMA_Init(DMA_Channel_TypeDef*DMAy_Channelx,DMA_InitTypeDef* DMA_InitStruct); void DMA_StructInit(DMA_InitTypeDef*DMA_InitStruct); void DMA_Cmd(DMA_Channel_TypeDef*DMAy_Channelx,FunctionalState NewState); void DMA_ITConfig(DMA_Channel_TypeDef*DMAy_Channelx,uint32_t DMA_IT, FunctionalStateNewState); voidDMA_SetCurrDataCounter(DMA_Channel_TypeDef*DMAy_Channelx, uint16_tDataNumber); uint16_tDMA_GetCurrDataCounter(DMA_Channel_TypeDef*DMAy_Channelx); FlagStatus DMA_GetFlagStatus(uint32_tDMAy_FLAG); void DMA_ClearFlag(uint32_tDMAy_FLAG); ITStatus DMA_GetITStatus(uint32_tDMAy_IT); void DMA_ClearITPendingBit(uint32_tDMAy_IT);
| 
