/*******************************************************************************
* File Name : main.c
* Author : Wuhan R&D Center, Embest
* Date First Issued : 08/08/2008
* Description : Main program body
********************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_TimeBaseInitTypeDef TIM2_TimeBaseStructure;
TIM_OCInitTypeDef TIM2_OCInitStructure;
TIM_BDTRInitTypeDef TIM2_BDTRInitStructure;
u16 capture = 0;
//u16 CCR1_Val = 0x7FFF;
u16 CCR1_Val = 0x0FFF;
u16 CCR2_Val = 0x3FFF;
u16 CCR3_Val = 0x1FFF;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
/* GPIO Configuration */
GPIO_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* -----------------------------------------------------------------------
TIM1 Configuration to:
1/ Generate 3 complementary PWM signals with 3 different duty cycles:
TIM1CLK = 72 MHz, Prescaler = 0x0, TIM1 counter clock = 72 MHz
TIM1 frequency = TIM1CLK/(TIM1_Period + 1) = 1.098 KHz
TIM1 Channel1 duty cycle = TIM1->CCR1 / TIM1_Period = 50%
TIM1 Channel1N duty cycle = (TIM1_Period - TIM1_CCR1) / (TIM1_Period + 1) = 50%
TIM1 Channel2 duty cycle = TIM1_CCR2 / TIM1_Period = 25%
TIM1 Channel2N duty cycle = (TIM1_Period - TIM1_CCR1) / (TIM1_Period + 1) = 75%
TIM1 Channel3 duty cycle = TIM1_CCR3 / TIM1_Period = 12.5%
TIM1 Channel3N duty cycle = (TIM1_Period - TIM1_CCR3) / (TIM1_Period + 1) = 87.5%
2/ Insert a dead time equal to 1.62 us
3/ Configure the break feature, active at High level, and using the automatic
output enable feature
4/ Use the Locking parametres level1.
----------------------------------------------------------------------- */
/* TIM1 Peripheral Configuration */
TIM_DeInit(TIM2);
/* Time Base configuration */
TIM2_TimeBaseStructure.TIM_Prescaler = 0x5;
TIM2_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM2_TimeBaseStructure.TIM_Period = 0xFFFF;
TIM2_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM2_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM_TimeBaseInit(TIM2,&TIM2_TimeBaseStructure);
/* Channel 1, 2,3 and 4 Configuration in PWM mode */
TIM2_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM2_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM2_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM2_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM2_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM2_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM2_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM2_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM2,&TIM2_OCInitStructure);
// TIM2_OCInitStructure.TIM_Pulse = CCR2_Val;
//TIM_OC2Init(TIM2,&TIM2_OCInitStructure);
// TIM2_OCInitStructure.TIM_Pulse = CCR3_Val;
// TIM_OC3Init(TIM2,&TIM2_OCInitStructure);
/* Automatic Output enable, Break, dead time and lock configuration*/
// TIM2_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
// TIM2_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
// TIM2_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
// TIM2_BDTRInitStructure.TIM_DeadTime = 0x75;
// TIM2_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
// TIM2_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
// TIM2_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
// TIM_BDTRConfig(TIM2,&TIM2_BDTRInitStructure);
/* TIM1 counter enable */
TIM_Cmd(TIM2,ENABLE);
/* Main Output Enable */
TIM_CtrlPWMOutputs(TIM2,ENABLE);
while(1)
{
GPIOA->ODR = 0x0020;
}
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* 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)
{
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, 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)
{
}
}
/* TIM1, GPIOA and GPIOB clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA |
RCC_APB2Periph_GPIOB, ENABLE);
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configure the TIM1 Pins.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Configuration: Channel 1, 2, 3 and 4 Output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PC. as Output push-pull */
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_1|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_11|GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//输出
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* GPIOB Configuration: Channel 1N, 2N and 3N Output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* GPIOB Configuration: BKIN pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configure the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert error has occurred.
* Input : - file: pointer to the source file name
* - line: assert error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
while(1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/ |
