1 #ifndef __SWM341_DMA_H__
2 #define __SWM341_DMA_H__
3 
4 
5 typedef struct {
6     uint8_t  Mode;          //DMA_MODE_SINGLE、DMA_MODE_CIRCLE
7 
8     uint8_t  Unit;          //DMA_UNIT_BYTE、DMA_UNIT_HALFWORD、DMA_UNIT_WORD
9 
10     uint32_t Count;         //传输 Unit 个数，最大取值0x100000
11 
12     uint32_t SrcAddr;
13 
14     uint32_t DstAddr;
15 
16     uint8_t  SrcAddrInc;    //0 地址固定    1 地址递增
17 
18     uint8_t  DstAddrInc;
19 
20     uint8_t  Handshake;     //传输握手信号：DMA_HS_NO、DMA_CH0_UART0TX、DMA_CH0_SPI0TX、... ...
21 
22     uint8_t  Priority;      //DMA_PRI_LOW、DMA_PRI_HIGH
23 
24     uint32_t  INTEn;        //中断使能，有效值有 DMA_IT_DONE、DMA_IT_DSTSG_HALF、DMA_IT_DSTSG_DONE、DMA_IT_SRCSG_HALF、DMA_IT_SRCSG_DONE 及其“或”
25 } DMA_InitStructure;
26 
27 
28 #define DMA_CH0     0
29 #define DMA_CH1     1
30 #define DMA_CH2     2
31 #define DMA_CH3     3
32 
33 #define DMA_MODE_SINGLE         0       // 单次模式，传输完成后停止
34 #define DMA_MODE_CIRCLE         1       // 环形模式，传输完成后从头执行下一轮传输
35 
36 #define DMA_UNIT_BYTE       0
37 #define DMA_UNIT_HALFWORD   1
38 #define DMA_UNIT_WORD       2
39 
40 #define DMA_PRI_LOW         0
41 #define DMA_PRI_HIGH        1
42 
43 
44 #define DMA_HS_NO           (0 << 4)    // 无握手（Handshake）信号，启动传输后全部传完
45 #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
46 #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
47 #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
48 #define DMA_HS_MSK          (7 << 4)
49 
50 #define DMA_DIR_RX          (0 << 7)    // SRC --> DST
51 #define DMA_DIR_TX          (1 << 7)    // DST --> SRC
52 #define DMA_DIR_MSK         (1 << 7)
53 
54 // 源侧外设
55 #define DMA_CH0_UART1RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
56 #define DMA_CH0_SPI1RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
57 #define DMA_CH0_UART2RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
58 #define DMA_CH0_ADC0        (3 | DMA_HS_SRC | DMA_DIR_RX)
59 
60 #define DMA_CH1_UART0RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
61 #define DMA_CH1_SPI0RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
62 #define DMA_CH1_UART3RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
63 
64 #define DMA_CH2_UART3RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
65 #define DMA_CH2_SPI0RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
66 #define DMA_CH2_UART0RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
67 
68 #define DMA_CH3_UART2RX     (0 | DMA_HS_SRC | DMA_DIR_RX)
69 #define DMA_CH3_SPI1RX      (1 | DMA_HS_SRC | DMA_DIR_RX)
70 #define DMA_CH3_UART1RX     (2 | DMA_HS_SRC | DMA_DIR_RX)
71 #define DMA_CH3_ADC1        (3 | DMA_HS_SRC | DMA_DIR_RX)
72 
73 // 目标侧外设
74 #define DMA_CH0_UART0TX     (0 | DMA_HS_DST | DMA_DIR_RX)
75 #define DMA_CH0_SPI0TX      (1 | DMA_HS_DST | DMA_DIR_RX)
76 #define DMA_CH0_UART3TX     (2 | DMA_HS_DST | DMA_DIR_RX)
77 
78 #define DMA_CH1_UART1TX     (0 | DMA_HS_DST | DMA_DIR_RX)
79 #define DMA_CH1_SPI1TX      (1 | DMA_HS_DST | DMA_DIR_RX)
80 #define DMA_CH1_UART2TX     (2 | DMA_HS_DST | DMA_DIR_RX)
81 
82 #define DMA_CH2_UART2TX     (0 | DMA_HS_DST | DMA_DIR_RX)
83 #define DMA_CH2_SPI1TX      (1 | DMA_HS_DST | DMA_DIR_RX)
84 #define DMA_CH2_UART1TX     (2 | DMA_HS_DST | DMA_DIR_RX)
85 
86 #define DMA_CH3_UART3TX     (0 | DMA_HS_DST | DMA_DIR_RX)
87 #define DMA_CH3_SPI0TX      (1 | DMA_HS_DST | DMA_DIR_RX)
88 #define DMA_CH3_UART0TX     (2 | DMA_HS_DST | DMA_DIR_RX)
89 
90 // 外部握手信号
91 #define DMA_EXHS_TIMR0      (0 | DMA_HS_EXT | DMA_DIR_RX)
92 #define DMA_EXHS_TIMR1      (1 | DMA_HS_EXT | DMA_DIR_RX)
93 #define DMA_EXHS_TIMR2      (2 | DMA_HS_EXT | DMA_DIR_RX)
94 #define DMA_EXHS_TIMR3      (3 | DMA_HS_EXT | DMA_DIR_RX)
95 #define DMA_EXHS_TIMR4      (4 | DMA_HS_EXT | DMA_DIR_RX)
96 #define DMA_EXHS_TRIG0      (5 | DMA_HS_EXT | DMA_DIR_RX)   // DMA_TRIG0引脚
97 #define DMA_EXHS_TRIG1      (6 | DMA_HS_EXT | DMA_DIR_RX)   // DMA_TRIG1引脚
98 
99 
100 /* Interrupt Type */
101 #define DMA_IT_DONE         (1 <<  0)   //Transfer Done
102 #define DMA_IT_DSTSG_HALF   (1 <<  8)   //Destination Scatter-Gather Transfer Half
103 #define DMA_IT_DSTSG_DONE   (1 <<  9)   //Destination Scatter-Gather Transfer Done
104 #define DMA_IT_SRCSG_HALF   (1 << 16)   //Source      Scatter-Gather Transfer Half
105 #define DMA_IT_SRCSG_DONE   (1 << 17)   //Source      Scatter-Gather Transfer Done
106 
107 
108 
109 void DMA_CH_Init(uint32_t chn, DMA_InitStructure * initStruct); //DMA通道配置
110 void DMA_CH_Open(uint32_t chn);
111 void DMA_CH_Close(uint32_t chn);
112 
113 void DMA_CH_SetCount(uint32_t chn, uint32_t count);
114 void DMA_CH_SetSrcAddress(uint32_t chn, uint32_t address);
115 void DMA_CH_SetDstAddress(uint32_t chn, uint32_t address);
116 uint32_t DMA_CH_GetRemaining(uint32_t chn);
117 
118 void DMA_CH_INTEn(uint32_t chn, uint32_t it);                   //DMA中断使能
119 void DMA_CH_INTDis(uint32_t chn, uint32_t it);                  //DMA中断禁止
120 void DMA_CH_INTClr(uint32_t chn, uint32_t it);                  //DMA中断标志清除
121 uint32_t DMA_CH_INTStat(uint32_t chn, uint32_t it);             //DMA中断状态查询
122 
123 
124 #endif //__SWM341_DMA_H__
125