stm8s的PWM输出38KHz源代码 -

/******************** (C) COPYRIGHT 风驰电子嵌入式开发工作室 ********************/
#include "pwm.h"
#include "stm8s_tim2.h"
#include "stm8s_tim1.h"
static void Delay(u16 nCount);
void Tim1_PWM_Init(void)
{
//TIM1复位
TIM1_DeInit();
//16 MHz/16 分频= 1 兆赫、向上计数， 1 MHz /1000 =计数 1000
TIM1_TimeBaseInit( 15, TIM1_COUNTERMODE_UP, 999, 0 );
//初始化捕获/比较通道1（PWM模式1，启用输出比较），
TIM1_OC1Init( TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE,
//启用互补输出比较1，脉宽50%，输出比较极性高电平，
TIM1_OUTPUTNSTATE_ENABLE, 499, TIM1_OCPOLARITY_HIGH,
//互补输出比较极性高电平，输出比较空闲状态复位，互补输出比较空闲状态复//位）
TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_SET );
//启用定时器
TIM1_Cmd(ENABLE);
//允许主输出????? 移动 TIM1 定时器。选择 PWM 输出。
TIM1_CtrlPWMOutputs(ENABLE);
}
void SetTIM1_PWM_DutyCycle( uint16_t TIM1_Pulse)
{
/* Set the Pulse value */
TIM1->CCR1H = (uint8_t)(TIM1_Pulse >> 8);//ch1
TIM1->CCR1L = (uint8_t)(TIM1_Pulse);
}
void TestTIM1_PWM_LED(void)
{
u16 Duty_Val;
for(Duty_Val=0;Duty_Val<999;Duty_Val++)
{
SetTIM1_PWM_DutyCycle(Duty_Val);
Delay(0xfff);Delay(0xfff);
Delay(0xfff);Delay(0xfff);
}
}
void Tim2_PWM_Init(void)
{
TIM2_TimeBaseInit(TIM2_PRESCALER_1, 420);
TIM2_OC2Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,210, TIM2_OCPOLARITY_HIGH);
TIM2_OC2PreloadConfig(ENABLE);
TIM2_Cmd(ENABLE);
}
void SetTIM2_PWM_Frequency(uint16_t TIM2_Period)
{
/* Set the Autoreload value */
TIM2->ARRH = (uint8_t)(TIM2_Period >> 8);
TIM2->ARRL = (uint8_t)(TIM2_Period);
}
void SetTIM2_PWM_DutyCycle( uint16_t TIM2_Pulse)
{
TIM2->CCR2H = (uint8_t)(TIM2_Pulse >> 8);
TIM2->CCR2L = (uint8_t)(TIM2_Pulse);
}
void TestTim2_PWM_LED(void)
{
u16 Duty_Val;
for(Duty_Val=0;Duty_Val<999;Duty_Val++)
{
SetTIM2_PWM_DutyCycle(Duty_Val);
Delay(0xfff);Delay(0xfff);
Delay(0xfff);Delay(0xfff);
}
}
void Delay(u16 nCount)
{
/* Decrement nCount value */
while (nCount != 0)
{
nCount--;
}
}
/******************* (C) COPYRIGHT 风驰电子嵌入式开发工作室 *****END OF FILE****/

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