1 | #include "stm32f4xx.h"
|
2 |
|
3 | void DAC_CH1_Init(void);
|
4 |
|
5 | uint16_t buffer[4096];
|
6 | int i;
|
7 |
|
8 | int main(void)
|
9 | {
|
10 | SystemInit();
|
11 |
|
12 | for(i = 0; i < 4096; i++)
|
13 | {
|
14 | buffer[i] = i;
|
15 | }
|
16 |
|
17 | DAC_CH1_Init();
|
18 |
|
19 |
|
20 | while(1)
|
21 | {
|
22 | }
|
23 |
|
24 | return 1;
|
25 | }
|
26 |
|
27 | void DAC_CH1_Init(void)
|
28 | {
|
29 | //GPIO
|
30 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
|
31 |
|
32 | GPIO_DeInit(GPIOA);
|
33 |
|
34 | GPIO_InitTypeDef GPIO_A4;
|
35 |
|
36 | GPIO_A4.GPIO_Mode = GPIO_Mode_AN;
|
37 | GPIO_A4.GPIO_OType = GPIO_OType_PP;
|
38 | GPIO_A4.GPIO_Pin = GPIO_Pin_4;
|
39 | GPIO_A4.GPIO_PuPd = GPIO_PuPd_NOPULL;
|
40 | GPIO_A4.GPIO_Speed = GPIO_Speed_50MHz;
|
41 |
|
42 | GPIO_Init(GPIOA, &GPIO_A4);
|
43 |
|
44 | //TIM6
|
45 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
|
46 |
|
47 | TIM_DeInit(TIM6);
|
48 |
|
49 | TIM_TimeBaseInitTypeDef TIM6_Init_Struct;
|
50 |
|
51 | TIM6_Init_Struct.TIM_ClockDivision = TIM_CKD_DIV1;
|
52 | TIM6_Init_Struct.TIM_CounterMode = TIM_CounterMode_Up;
|
53 | TIM6_Init_Struct.TIM_Period = 0xFF;
|
54 | TIM6_Init_Struct.TIM_Prescaler = 0;
|
55 | TIM_TimeBaseInit(TIM6, &TIM6_Init_Struct);
|
56 |
|
57 | TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);
|
58 |
|
59 | TIM_Cmd(TIM6, ENABLE);
|
60 |
|
61 | //DAC
|
62 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
|
63 |
|
64 | DAC_DeInit();
|
65 |
|
66 | DAC_InitTypeDef DAC_CH1;
|
67 |
|
68 | DAC_CH1.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
|
69 | DAC_CH1.DAC_Trigger = DAC_Trigger_T6_TRGO;
|
70 | DAC_CH1.DAC_WaveGeneration = DAC_WaveGeneration_None;
|
71 |
|
72 | DAC_Init(DAC_Channel_1, &DAC_CH1);
|
73 |
|
74 | //DMA
|
75 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
|
76 |
|
77 | DMA_DeInit(DMA1_Stream5);
|
78 |
|
79 | DMA_InitTypeDef DMA1_STR5_CH7;
|
80 |
|
81 | DMA1_STR5_CH7.DMA_BufferSize = 4096;
|
82 | DMA1_STR5_CH7.DMA_Channel = DMA_Channel_7;
|
83 | DMA1_STR5_CH7.DMA_DIR = DMA_DIR_MemoryToPeripheral;
|
84 | DMA1_STR5_CH7.DMA_FIFOMode = DMA_FIFOMode_Disable;
|
85 | DMA1_STR5_CH7.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
|
86 | DMA1_STR5_CH7.DMA_Memory0BaseAddr = (uint32_t)&buffer;
|
87 | DMA1_STR5_CH7.DMA_MemoryBurst = DMA_MemoryBurst_Single;
|
88 | DMA1_STR5_CH7.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
|
89 | DMA1_STR5_CH7.DMA_MemoryInc = DMA_MemoryInc_Enable;
|
90 | DMA1_STR5_CH7.DMA_Mode = DMA_Mode_Circular;
|
91 | DMA1_STR5_CH7.DMA_PeripheralBaseAddr = DAC->DOR1; //-----??????????------
|
92 | DMA1_STR5_CH7.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
|
93 | DMA1_STR5_CH7.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
|
94 | DMA1_STR5_CH7.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
|
95 | DMA1_STR5_CH7.DMA_Priority = DMA_Priority_High;
|
96 |
|
97 | DMA_Init(DMA1_Stream5, &DMA1_STR5_CH7);
|
98 |
|
99 | DMA_Cmd(DMA1_Stream5, ENABLE);
|
100 |
|
101 | DAC_Cmd(DAC_Channel_1, ENABLE);
|
102 |
|
103 | DAC_DMACmd(DAC_Channel_1, ENABLE);
|
104 | }
|