stm8s的PWM輸出38KHz源代碼

ID:324297 · 發表于 2018-5-7 16:23

使用stm8s的TIM2 ,輸出38KHz的PWM
測試TIME2_CH2的PWM，輸出38KHz。
必須放在首次建立工程文件的路徑下編譯，否則無效。
測試TIME1_CH1的PWM，輸出1KHz，可以調PWM。
TIME1_CH1輸出需要更改option bytes:AFR0。

單片機源程序如下:

/******************** (C) COPYRIGHT 風馳電子嵌入式開發工作室 ********************/
#include "pwm.h"
#include "stm8s_tim2.h"
#include "stm8s_tim1.h"
static void Delay(u16 nCount);
void Tim1_PWM_Init(void)
{
//TIM1復位
TIM1_DeInit();
//16 MHz/16 分頻= 1 兆赫、向上計數， 1 MHz /1000 =計數 1000
TIM1_TimeBaseInit( 15, TIM1_COUNTERMODE_UP, 999, 0 );
//初始化捕獲/比較通道1（PWM模式1，啟用輸出比較），
TIM1_OC1Init( TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE,
//啟用互補輸出比較1，脈寬50%，輸出比較極性高電平，
TIM1_OUTPUTNSTATE_ENABLE, 499, TIM1_OCPOLARITY_HIGH,
//互補輸出比較極性高電平，輸出比較空閑狀態復位，互補輸出比較空閑狀態復//位）
TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_SET );
//啟用定時器
TIM1_Cmd(ENABLE);
//允許主輸出????? 移動 TIM1 定時器。選擇 PWM 輸出。
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 風馳電子嵌入式開發工作室 *****END OF FILE****/