rt-thread/bsp/synwit/swm341/libraries/SWM341_StdPeriph_Driver/SWM341_dma.h

#ifndef __SWM341_DMA_H__
#define __SWM341_DMA_H__


typedef struct {
    uint8_t  Mode;          //DMA_MODE_SINGLE、DMA_MODE_CIRCLE

    uint8_t  Unit;          //DMA_UNIT_BYTE、DMA_UNIT_HALFWORD、DMA_UNIT_WORD

    uint32_t Count;         //传输 Unit 个数，最大取值0x100000

    uint32_t SrcAddr;

    uint32_t DstAddr;

    uint8_t  SrcAddrInc;    //0 地址固定    1 地址递增

    uint8_t  DstAddrInc;

    uint8_t  Handshake;     //传输握手信号：DMA_HS_NO、DMA_CH0_UART0TX、DMA_CH0_SPI0TX、... ...

    uint8_t  Priority;      //DMA_PRI_LOW、DMA_PRI_HIGH

    uint8_t  DoneIE;        //传输完成中断使能
} DMA_InitStructure;


#define DMA_CH0     0
#define DMA_CH1     1
#define DMA_CH2     2
#define DMA_CH3     3

#define DMA_MODE_SINGLE         0       // 单次模式，传输完成后停止
#define DMA_MODE_CIRCLE         1       // 环形模式，传输完成后从头执行下一轮传输

#define DMA_UNIT_BYTE       0
#define DMA_UNIT_HALFWORD   1
#define DMA_UNIT_WORD       2

#define DMA_PRI_LOW         0
#define DMA_PRI_HIGH        1


#define DMA_HS_NO           (0 << 4)    // 无握手（Handshake）信号，启动传输后全部传完
#define DMA_HS_SRC          (1 << 4)    // 源  侧握手信号，启动传输后源  侧生成一个数据，DMA搬运一个Unit
#define DMA_HS_DST          (2 << 4)    // 目标侧握手信号，启动传输后目标侧索取一个数据，DMA搬运一个Unit
#define DMA_HS_EXT          (4 << 4)    // 外部  握手信号，启动传输后外部握手来一个脉冲，DMA搬运一个Unit
#define DMA_HS_MSK          (7 << 4)

#define DMA_DIR_RX          (0 << 7)    // SRC --> DST
#define DMA_DIR_TX          (1 << 7)    // DST --> SRC
#define DMA_DIR_MSK         (1 << 7)

// 源侧外设
#define DMA_CH0_UART1RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH0_SPI1RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH0_UART2RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH0_ADC0        (3 | DMA_HS_SRC | DMA_DIR_RX)

#define DMA_CH1_UART0RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH1_SPI0RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH1_UART3RX     (2 | DMA_HS_SRC | DMA_DIR_RX)

#define DMA_CH2_UART3RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH2_SPI0RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH2_UART0RX     (2 | DMA_HS_SRC | DMA_DIR_RX)

#define DMA_CH3_UART2RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH3_SPI1RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH3_UART1RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
#define DMA_CH3_ADC1        (3 | DMA_HS_SRC | DMA_DIR_RX)

// 目标侧外设
#define DMA_CH0_UART0TX     (0 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH0_SPI0TX      (1 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH0_UART3TX     (2 | DMA_HS_DST | DMA_DIR_RX)

#define DMA_CH1_UART1TX     (0 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH1_SPI1TX      (1 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH1_UART2TX     (2 | DMA_HS_DST | DMA_DIR_RX)

#define DMA_CH2_UART2TX     (0 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH2_SPI1TX      (1 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH2_UART1TX     (2 | DMA_HS_DST | DMA_DIR_RX)

#define DMA_CH3_UART3TX     (0 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH3_SPI0TX      (1 | DMA_HS_DST | DMA_DIR_RX)
#define DMA_CH3_UART0TX     (2 | DMA_HS_DST | DMA_DIR_RX)

// 外部握手信号
#define DMA_EXHS_TIMR0      (0 | DMA_HS_EXT | DMA_DIR_RX)
#define DMA_EXHS_TIMR1      (1 | DMA_HS_EXT | DMA_DIR_RX)
#define DMA_EXHS_TIMR2      (2 | DMA_HS_EXT | DMA_DIR_RX)
#define DMA_EXHS_TIMR3      (3 | DMA_HS_EXT | DMA_DIR_RX)
#define DMA_EXHS_TIMR4      (4 | DMA_HS_EXT | DMA_DIR_RX)
#define DMA_EXHS_TRIG0      (5 | DMA_HS_EXT | DMA_DIR_RX)   // DMA_TRIG0引脚
#define DMA_EXHS_TRIG1      (6 | DMA_HS_EXT | DMA_DIR_RX)   // DMA_TRIG1引脚



void DMA_CH_Init(uint32_t chn, DMA_InitStructure * initStruct); //DMA通道配置
void DMA_CH_Open(uint32_t chn);
void DMA_CH_Close(uint32_t chn);

void DMA_CH_INTEn(uint32_t chn);                //DMA中断使能，数据搬运完成后触发中断
void DMA_CH_INTDis(uint32_t chn);               //DMA中断禁止，数据搬运完成后不触发中断
void DMA_CH_INTClr(uint32_t chn);               //DMA中断标志清除
uint32_t DMA_CH_INTStat(uint32_t chn);          //DMA中断状态查询，1 数据搬运完成    0 数据搬运未完成


#endif //__SWM341_DMA_H__