Сб янв 20, 2018 10:34:43
#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)
{
}
}