tail_light_stm8/usr/src/hw_init.c

#include "stm8s.h"

void HW_Init(void)
{
  disableInterrupts();
  //时钟设置
  CLK_DeInit();                        
  CLK_HSICmd(ENABLE); //配置内部高速时钟  
  CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1); //时钟1分频
  CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1); //内核1分频
  CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, ENABLE);
  CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER1, ENABLE);
  CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER2, ENABLE);
  CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER4, ENABLE);
  CLK_PeripheralClockConfig(CLK_PERIPHERAL_ADC, ENABLE);

  //GPIO
  GPIO_DeInit(GPIOA);
	
  GPIO_DeInit(GPIOB);
	
  GPIO_DeInit(GPIOC);
  GPIO_Init(GPIOC, GPIO_PIN_3, GPIO_MODE_IN_PU_IT); //PC3 INT2
  EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_FALL_ONLY);
  GPIO_Init(GPIOC, GPIO_PIN_7, GPIO_MODE_IN_PU_IT); //PC7 INT7
  EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_FALL_ONLY);
	
  GPIO_DeInit(GPIOD);
  GPIO_Init(GPIOD, GPIO_PIN_4, GPIO_MODE_IN_PU_NO_IT); //PD4 KEY

  //TIM1
  TIM1_DeInit();
  TIM1_TimeBaseInit(15, TIM1_COUNTERMODE_UP, 999, 0);
  TIM1_OC1Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE,
               0, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_RESET,
               TIM1_OCNIDLESTATE_SET);  //PWM1模式，输出使能，不互补，占空比800， 输出极性高，空闲低电平
  TIM1_OC1PreloadConfig(ENABLE);
  TIM1_CCxCmd(TIM1_CHANNEL_1,ENABLE);
  TIM1_CtrlPWMOutputs(ENABLE);
  TIM1_Cmd(ENABLE);
	
  //TIM2
  TIM2_DeInit();
  TIM2_TimeBaseInit(TIM2_PRESCALER_16, 999);
  TIM2_OC1Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE, 0, TIM2_OCPOLARITY_LOW);
  TIM2_OC1PreloadConfig(ENABLE);
  TIM2_OC2Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE, 0, TIM2_OCPOLARITY_LOW);
  TIM2_OC2PreloadConfig(ENABLE);       
  TIM2_OC3Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE, 0, TIM2_OCPOLARITY_LOW);
  TIM2_OC3PreloadConfig(ENABLE);
  TIM2_ARRPreloadConfig(ENABLE);
  TIM2_Cmd(ENABLE);
	
  //TIM4
  TIM4_DeInit();
  TIM4_TimeBaseInit(TIM4_PRESCALER_64, 249); //1ms
  TIM4_ARRPreloadConfig(ENABLE);
  TIM4_ClearFlag(TIM4_FLAG_UPDATE);
  TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);
  TIM4_Cmd(ENABLE);
  
  //ADC
  GPIO_Init(GPIOD, GPIO_PIN_5, GPIO_MODE_IN_FL_NO_IT); //Light_in,ch5
  GPIO_Init(GPIOD, GPIO_PIN_6, GPIO_MODE_IN_FL_NO_IT); //Vin,ch6
  GPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_IN_FL_NO_IT); //Chg_in,ch2
  ADC1_DeInit();
	
  //IWDG
  if (RST_GetFlagStatus(RST_FLAG_IWDGF) != RESET)
    RST_ClearFlag(RST_FLAG_IWDGF);
  IWDG_Enable(); //0xCC
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable); //0x55
  IWDG_SetPrescaler(IWDG_Prescaler_256);
  IWDG_SetReload((uint8_t)(0xFF));//510ms
  IWDG_ReloadCounter(); //0xAA
  
  /* Enable general interrupts */  
  enableInterrupts();
}

void ADC_CH_Init(uint8_t ch)
{
  char l = 0;
  ADC1->CR1  = 0x00;                    //fADC = fMASTER/2, 8Mhz  单次转换，禁止转换
  ADC1->CSR  = ch + 1;                  //控制状态寄存器 选择要 AD输入通道  如：PD2(AIN3)
  ADC1->CR2  = 0x00;                    //默认左对齐 读数据时先读高在读低
  ADC1->TDRL = ( 1 << ( ch + 1 ) );     //禁止相应通道 施密特触发功能 1左移ch+1位
  ADC1->CR1 |= 0x01;                    //使能ADC并开始转换
  ADC1->CSR |= 0x20;                    //EOCIE 使能转换结束中断  EOC中断使能
  for( l = 0; l < 100; l++ );           //延时，保证ADC模块的上电完成 至少7us
  ADC1->CR1 = ADC1->CR1 | 0x01;         //再次将CR1寄存器的最低位置１ 使能ADC 并开始转换
}