2016-05-10 02:41 AM
Hi!
I want to use DAC generating Sine wave. But I don't understand why I need '' static'' key in the functionstatic void
TIM6_Config(void
);
static
void
DAC1_Config(void
);If I delete static, Sine wave do not creat. :( I need some explanation about static function and Timer trigger in STM32. this is my full code:
&sharpinclude <stm32f4xx.h>
&sharpdefine
OUT_FREQ 5000//
Output waveform frequency
&sharpdefine
SINE_RES 128//
Waveform resolution
&sharpdefine
DAC_DHR12R1_ADDR 0x40007408//
DMA writes into this reg on every request
&sharpdefine
CNT_FREQ 42000000//
TIM6 counter clock (prescaled APB1)
&sharpdefine
TIM_PERIOD ((CNT_FREQ)/((SINE_RES)*(OUT_FREQ)))//
Autoreload reg value
const
uint16_t function[SINE_RES] = {2048
,2145
,2242
,2339
,2435
,2530
,2624
,2717
,2808
,2897
,
2984
,3069
,3151
,3230
,3307
,3381
,3451
,3518
,3581
,3640
,
3696
,3748
,3795
,3838
,3877
,3911
,3941
,3966
,3986
,4002
,
4013
,4019
,4020
,4016
,4008
,3995
,3977
,3954
,3926
,3894
,
3858
,3817
,3772
,3722
,3669
,3611
,3550
,3485
,3416
,3344
,
3269
,3191
,3110
,3027
,2941
,2853
,2763
,2671
,2578
,2483
,
2387
,2291
,2194
,2096
,1999
,1901
,1804
,1708
,1612
,1517
,
1424
,1332
,1242
,1154
,1068
,985
,904
,826
,751
,679
,
610
,545
,484
,426
,373
,323
,278
,237
,201
,169
,
141
,118
,100
,87
,79
,75
,76
,82
,93
,109
,
129
,154
,184
,218
,257
,300
,347
,399
,455
,514
,
577
,644
,714
,788
,865
,944
,1026
,1111
,1198
,1287
,
1378
,1471
,1565
,1660
,1756
,1853
,1950
,2047
};
static
void
TIM6_Config(void
);
static
void
DAC1_Config(void
);
int
main(){ GPIO_InitTypeDef gpio_A; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); gpio_A.GPIO_Pin
=GPIO_Pin_4; gpio_A.GPIO_Mode
=GPIO_Mode_AN; gpio_A.GPIO_PuPd
=GPIO_PuPd_NOPULL; GPIO_Init(GPIOA,
&gpio_A); TIM6_Config(); DAC1_Config();
while
(1
) { } }
static
void
TIM6_Config(void
){ TIM_TimeBaseInitTypeDef TIM6_TimeBase; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE); TIM_TimeBaseStructInit(
&TIM6_TimeBase); TIM6_TimeBase.TIM_Period
=(uint16_t)TIM_PERIOD; TIM6_TimeBase.TIM_Prescaler
=0
; TIM6_TimeBase.TIM_ClockDivision
=0
; TIM6_TimeBase.TIM_CounterMode
=TIM_CounterMode_Up; TIM_TimeBaseInit(TIM6,
&TIM6_TimeBase); TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update); TIM_Cmd(TIM6, ENABLE);}
static
void
DAC1_Config(void
){ DAC_InitTypeDef DAC_INIT; DMA_InitTypeDef DMA_INIT; DAC_INIT.DAC_Trigger
=DAC_Trigger_T6_TRGO; DAC_INIT.DAC_WaveGeneration
=DAC_WaveGeneration_None; DAC_INIT.DAC_OutputBuffer
=DAC_OutputBuffer_Enable; DAC_Init(DAC_Channel_1,
&DAC_INIT); DMA_DeInit(DMA1_Stream5); DMA_INIT.DMA_Channel
=DMA_Channel_7; DMA_INIT.DMA_PeripheralBaseAddr
=(uint32_t)DAC_DHR12R1_ADDR; DMA_INIT.DMA_Memory0BaseAddr
= (uint32_t)&function; DMA_INIT.DMA_DIR
=DMA_DIR_MemoryToPeripheral; DMA_INIT.DMA_BufferSize
=SINE_RES; DMA_INIT.DMA_PeripheralInc
=DMA_PeripheralInc_Disable; DMA_INIT.DMA_MemoryInc
=DMA_MemoryInc_Enable; DMA_INIT.DMA_PeripheralDataSize
=DMA_PeripheralDataSize_HalfWord; DMA_INIT.DMA_MemoryDataSize
=DMA_MemoryDataSize_HalfWord; DMA_INIT.DMA_Mode
=DMA_Mode_Circular; DMA_INIT.DMA_Priority
=DMA_Priority_High; DMA_INIT.DMA_FIFOMode
=DMA_FIFOMode_Disable; DMA_INIT.DMA_FIFOThreshold
=DMA_FIFOThreshold_HalfFull; DMA_INIT.DMA_MemoryBurst
=DMA_MemoryBurst_Single; DMA_INIT.DMA_PeripheralBurst
=DMA_PeripheralBurst_Single; DMA_Init(DMA1_Stream5,
&DMA_INIT); DMA_Cmd(DMA1_Stream5, ENABLE); DAC_Cmd(DAC_Channel_1, ENABLE); DAC_DMACmd(DAC_Channel_1, ENABLE);}
#timer-trigger #static2016-05-10 03:55 AM
The code as presented is nearly unreadable, please use the Format Code Block option. The Paintbrush [{}] icon.
The static directive shouldn't make.a difference to the functions in this context. What compiler are you using? Have you single stepped the code in a debugger to better understand what is going on.2016-05-10 05:03 AM
#include <
stm32f4xx.h
>
#define OUT_FREQ 5000 // Output waveform frequency
#define SINE_RES 128 // Waveform resolution
#define DAC_DHR12R1_ADDR 0x40007408 // DMA writes into this reg on every request
#define CNT_FREQ 42000000 // TIM6 counter clock (prescaled APB1)
#define TIM_PERIOD ((CNT_FREQ)/((SINE_RES)*(OUT_FREQ))) // Autoreload reg value
const uint16_t function[SINE_RES] = { 2048, 2145, 2242, 2339, 2435, 2530, 2624, 2717, 2808, 2897,
2984, 3069, 3151, 3230, 3307, 3381, 3451, 3518, 3581, 3640,
3696, 3748, 3795, 3838, 3877, 3911, 3941, 3966, 3986, 4002,
4013, 4019, 4020, 4016, 4008, 3995, 3977, 3954, 3926, 3894,
3858, 3817, 3772, 3722, 3669, 3611, 3550, 3485, 3416, 3344,
3269, 3191, 3110, 3027, 2941, 2853, 2763, 2671, 2578, 2483,
2387, 2291, 2194, 2096, 1999, 1901, 1804, 1708, 1612, 1517,
1424, 1332, 1242, 1154, 1068, 985, 904, 826, 751, 679,
610, 545, 484, 426, 373, 323, 278, 237, 201, 169,
141, 118, 100, 87, 79, 75, 76, 82, 93, 109,
129, 154, 184, 218, 257, 300, 347, 399, 455, 514,
577, 644, 714, 788, 865, 944, 1026, 1111, 1198, 1287,
1378, 1471, 1565, 1660, 1756, 1853, 1950, 2047 };
static void TIM6_Config(void);
static void DAC1_Config(void);
int main()
{
GPIO_InitTypeDef gpio_A;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
gpio_A.GPIO_Pin = GPIO_Pin_4;
gpio_A.GPIO_Mode = GPIO_Mode_AN;
gpio_A.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &gpio_A);
TIM6_Config();
DAC1_Config();
while (1)
{
}
}
static void TIM6_Config(void)
{
TIM_TimeBaseInitTypeDef TIM6_TimeBase;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
TIM_TimeBaseStructInit(&TIM6_TimeBase);
TIM6_TimeBase.TIM_Period = (uint16_t)TIM_PERIOD;
TIM6_TimeBase.TIM_Prescaler = 0;
TIM6_TimeBase.TIM_ClockDivision = 0;
TIM6_TimeBase.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM6, &TIM6_TimeBase);
TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);
TIM_Cmd(TIM6, ENABLE);
}
static void DAC1_Config(void)
{
DAC_InitTypeDef DAC_INIT;
DMA_InitTypeDef DMA_INIT;
DAC_INIT.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_INIT.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_INIT.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_INIT);
DMA_DeInit(DMA1_Stream5);
DMA_INIT.DMA_Channel = DMA_Channel_7;
DMA_INIT.DMA_PeripheralBaseAddr = (uint32_t)DAC_DHR12R1_ADDR;
DMA_INIT.DMA_Memory0BaseAddr = (uint32_t)&function;
DMA_INIT.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_INIT.DMA_BufferSize = SINE_RES;
DMA_INIT.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_INIT.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_INIT.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_INIT.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_INIT.DMA_Mode = DMA_Mode_Circular;
DMA_INIT.DMA_Priority = DMA_Priority_High;
DMA_INIT.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_INIT.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_INIT.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_INIT.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream5, &DMA_INIT);
DMA_Cmd(DMA1_Stream5, ENABLE);
DAC_Cmd(DAC_Channel_1, ENABLE);
DAC_DMACmd(DAC_Channel_1, ENABLE);
}
Sorry for my deficiency !!!
2016-05-10 05:07 AM
2016-05-10 05:43 AM
Nothing is really jumping out, any linker errors?
Try this#include <
stm32f4xx.h
>
#define OUT_FREQ 5000 // Output waveform frequency
#define SINE_RES 128 // Waveform resolution
#define DAC_DHR12R1_ADDR 0x40007408 // DMA writes into this reg on every request
#define CNT_FREQ 42000000 // TIM6 counter clock (prescaled APB1)
#define TIM_PERIOD ((CNT_FREQ)/((SINE_RES)*(OUT_FREQ))) // Autoreload reg value
const uint16_t function[SINE_RES] = { 2048, 2145, 2242, 2339, 2435, 2530, 2624, 2717, 2808, 2897,
2984, 3069, 3151, 3230, 3307, 3381, 3451, 3518, 3581, 3640,
3696, 3748, 3795, 3838, 3877, 3911, 3941, 3966, 3986, 4002,
4013, 4019, 4020, 4016, 4008, 3995, 3977, 3954, 3926, 3894,
3858, 3817, 3772, 3722, 3669, 3611, 3550, 3485, 3416, 3344,
3269, 3191, 3110, 3027, 2941, 2853, 2763, 2671, 2578, 2483,
2387, 2291, 2194, 2096, 1999, 1901, 1804, 1708, 1612, 1517,
1424, 1332, 1242, 1154, 1068, 985, 904, 826, 751, 679,
610, 545, 484, 426, 373, 323, 278, 237, 201, 169,
141, 118, 100, 87, 79, 75, 76, 82, 93, 109,
129, 154, 184, 218, 257, 300, 347, 399, 455, 514,
577, 644, 714, 788, 865, 944, 1026, 1111, 1198, 1287,
1378, 1471, 1565, 1660, 1756, 1853, 1950, 2047 };
void TIM6_Config(void);
void DAC1_Config(void);
int main()
{
GPIO_InitTypeDef gpio_A = { 0 };
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_DMA1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC | RCC_APB1Periph_TIM6, ENABLE);
gpio_A.GPIO_Pin = GPIO_Pin_4;
gpio_A.GPIO_Mode = GPIO_Mode_AN;
gpio_A.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &gpio_A);
TIM6_Config();
DAC1_Config();
while(1)
{
}
}
void TIM6_Config(void)
{
TIM_TimeBaseInitTypeDef TIM6_TimeBase;
TIM_TimeBaseStructInit(&TIM6_TimeBase);
TIM6_TimeBase.TIM_Period = (uint16_t)(TIM_PERIOD - 1); // 0 .. N-1
TIM6_TimeBase.TIM_Prescaler = 0;
TIM6_TimeBase.TIM_ClockDivision = 0;
TIM6_TimeBase.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM6, &TIM6_TimeBase);
TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);
TIM_Cmd(TIM6, ENABLE);
}
void DAC1_Config(void)
{
DAC_InitTypeDef DAC_INIT = { 0 };
DMA_InitTypeDef DMA_INIT = { 0 };
DAC_INIT.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_INIT.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_INIT.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_INIT);
DMA_DeInit(DMA1_Stream5);
DMA_INIT.DMA_Channel = DMA_Channel_7;
DMA_INIT.DMA_PeripheralBaseAddr = (uint32_t)DAC_DHR12R1_ADDR;
DMA_INIT.DMA_Memory0BaseAddr = (uint32_t)&function[0];
DMA_INIT.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_INIT.DMA_BufferSize = SINE_RES;
DMA_INIT.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_INIT.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_INIT.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_INIT.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_INIT.DMA_Mode = DMA_Mode_Circular;
DMA_INIT.DMA_Priority = DMA_Priority_High;
DMA_INIT.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_INIT.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_INIT.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_INIT.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream5, &DMA_INIT);
DMA_Cmd(DMA1_Stream5, ENABLE);
DAC_Cmd(DAC_Channel_1, ENABLE);
DAC_DMACmd(DAC_Channel_1, ENABLE);
}
2016-05-10 06:08 AM
thanks for your suicide. I am going to test your code in tomorrow because i don't have any oscilloscope in my home.:).
2016-05-10 07:19 PM
I was test your code and the result is correct. I received sine wave on my oscilloscope. but I don't understand why I did wrong. Can you tell me abotut that?
2016-05-10 07:40 PM
And why I need to set first value for
GPIO_InitTypeDef gpio_A = { 0 };
DAC_InitTypeDef DAC_INIT = { 0 };
DMA_InitTypeDef DMA_INIT = { 0 };