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STM32F1 генерация ШИМ на TIM4 с использованием DMA

Сб янв 20, 2018 10:34:43

Добрый день!
Пытаюсь запустить генерацию PWM с использованием DMA на таймере TIM4.
Вот код:
Код:
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_usart.h"
#include "stm32f10x_dma.h"
#include "misc.h"
 
#include <string.h>
 
#define F_CLK 72000000
 
#define SIG_BUF_SIZE 20
 
volatile uint16_t signal[SIG_BUF_SIZE] = {200, 1000, 700, 10, 50, 200, 1000, 700, 10, 50,200, 10000, 700, 10, 50,200, 6000, 700, 10, 15000};
 
void timer_dma_init(void)
{
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE );
 
    DMA_InitTypeDef DMA_InitStructure;
 
    DMA_InitStructure.DMA_BufferSize = SIG_BUF_SIZE;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&signal[0];
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&TIM4->CCR1;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_Init(DMA1_Channel1, &DMA_InitStructure);
    DMA_Cmd(DMA1_Channel1 , ENABLE ) ;
 
    TIM_DMACmd(TIM4, TIM_DMA_CC1, ENABLE);
 
    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
    NVIC_EnableIRQ(DMA1_Channel1_IRQn);
 
 
}
 
void DMA1_Channel1_IRQHandler(void)
{
    DMA_ClearITPendingBit(DMA1_IT_TC1);
    DMA_Cmd(DMA1_Channel1, ENABLE);
}
 
void SetSysClockTo72(void)
{
    ErrorStatus HSEStartUpStatus;
    /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ----------*/
    /* RCC system reset(for debug purpose) */
    RCC_DeInit();
 
    /* Enable HSE */
    RCC_HSEConfig( RCC_HSE_ON);
 
    /* Wait till HSE is ready */
    HSEStartUpStatus = RCC_WaitForHSEStartUp();
 
    if (HSEStartUpStatus == SUCCESS)
    {
        /* Enable Prefetch Buffer */
        //FLASH_PrefetchBufferCmd( FLASH_PrefetchBuffer_Enable);
 
        /* Flash 2 wait state */
        //FLASH_SetLatency( FLASH_Latency_2);
 
        /* HCLK = SYSCLK */
        RCC_HCLKConfig( RCC_SYSCLK_Div1);
 
        /* PCLK2 = HCLK */
        RCC_PCLK2Config( RCC_HCLK_Div1);
 
        /* PCLK1 = HCLK/2 */
        RCC_PCLK1Config( RCC_HCLK_Div2);
 
        /* PLLCLK = 8MHz * 9 = 72 MHz */
        RCC_PLLConfig(0x00010000, RCC_PLLMul_9);
 
        /* Enable PLL */
        RCC_PLLCmd( ENABLE);
 
        /* Wait till PLL is ready */
        while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
        {
        }
 
        /* Select PLL as system clock source */
        RCC_SYSCLKConfig( RCC_SYSCLKSource_PLLCLK);
 
        /* Wait till PLL is used as system clock source */
        while (RCC_GetSYSCLKSource() != 0x08)
        {
        }
    }
    else
    { /* If HSE fails to start-up, the application will have wrong clock configuration.
     User can add here some code to deal with this error */
 
        /* Go to infinite loop */
        while (1)
        {
        }
    }
}
 
int main(void)
{
    // Set System clock
    SetSysClockTo72();
 
    /* Initialize LED which connected to PC13 */
    GPIO_InitTypeDef  port;
    // Enable PORTC Clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
   
    /* Configure the GPIO_LED pin */
    port.GPIO_Pin = GPIO_Pin_13;
    port.GPIO_Mode = GPIO_Mode_Out_PP;
    port.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC, &port);
 
    GPIO_ResetBits(GPIOC, GPIO_Pin_13); // Set C13 to Low level ("0")
 
    GPIO_StructInit(&port);
    port.GPIO_Mode = GPIO_Mode_AF_PP;
    port.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
    port.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &port);
 
    TIM_TimeBaseInitTypeDef timer;
    TIM_OCInitTypeDef timerPWM;
 
    TIM_TimeBaseStructInit(&timer);
    timer.TIM_Prescaler = 7;
    timer.TIM_Period = 25;
    timer.TIM_ClockDivision = 0;
    timer.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM4, &timer);
   
    TIM_OCStructInit(&timerPWM);
    timerPWM.TIM_OCMode = TIM_OCMode_PWM1;
    timerPWM.TIM_OutputState = TIM_OutputState_Enable;
    timerPWM.TIM_Pulse = 10;
    timerPWM.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM4, &timerPWM);
    TIM_OC2Init(TIM4, &timerPWM);
 
 
    timer_dma_init();
 
    TIM_Cmd(TIM4, ENABLE);
   
 
    while (1)
    {
       
    }
}

Что я делаю не так? Помогите пожалуйста!
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