问答

[i=s] 本帖最后由 sky_42959069 于 2021-11-17 11:12 编辑 [/i] [img]data:image/png;base64,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***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***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[/img]SYS->GPA_MFP&=~(SYS_GPA_MFP_PA14_Msk|SYS_GPA_MFP_PA15_Msk); SYS->GPA_MFP|=(SYS_GPA_MFP_PA14_PWM0_CH2|SYS_GPA_MFP_PA15_PWM0_CH3);//PA14 PA15 用于PW0-CH2 CH3 //引脚设置 void PWM_Init(void) { PWM_ConfigOutputChannel(PWM0,2,20000,0); PWM_ConfigOutputChannel(PWM0,3,20000,0); PWM_EnableOutput(PWM0,PWM_CH_2_MASK); PWM_EnableOutput(PWM0,PWM_CH_3_MASK); PWM_EnablePeriodInt(PWM0,2,0); PWM_EnablePeriodInt(PWM0,3,0); NVIC_EnableIRQ(PWM0_IRQn); } //初始化 请大神们帮忙看下，初次玩新唐请多关照！

[color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]今天学习了pwm的原理后,尝试用SYSTICK模拟pwm的占空比变化来实现LED的呼吸效果,但没有成功.是因为不使用GPIO的pwm模式就无法输出模拟电压吗?[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]代码如下:[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]int main(void)[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]{[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] [/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] u32 i;[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] LED_Init();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] delay_init();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] [/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] while(1)[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] {[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] for(i=0xFFFFF; i>0 ;i--)[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] {[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] LED_Output_Low();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] delay_ms(1);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] LED_Output_High();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] delay_ms(9);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] }[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] [/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] for(i=0xFFFFF; i>0;i--)[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] {[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] LED_Output_Low();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] delay_ms(9);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] LED_Output_High();[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] delay_ms(1);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] }[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] }[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px] [/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]}[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(255, 255, 255)][font=Tahoma, "][size=15px]在两个时间段内赋予不同的占空比,跟pwm的原理应该是一样的,但不知道为什么不能实现呼吸灯效果[/size][/font][/backcolor][/color]

今天学习了pwm的原理后,尝试用SYSTICK模拟pwm的占空比变化来实现LED的呼吸效果,但没有成功.是因为不使用GPIO的pwm模式就无法输出模拟电压吗? 代码如下: int main(void) { u32 i; LED_Init(); delay_init(); while(1) { for(i=0xFFFFF; i>0 ;i--) { LED_Output_Low(); delay_ms(1); LED_Output_High(); delay_ms(9); } for(i=0xFFFFF; i>0;i--) { LED_Output_Low(); delay_ms(9); LED_Output_High(); delay_ms(1); } } } 在两个时间段内赋予不同的占空比,跟pwm的原理应该是一样的,但不知道为什么不能实现呼吸灯效果

电路里面Sinking Output怎么翻译比较好

大神，电流信号放大器技术手册里的Total Output Error具体指什么？

各位大神，电流信号放大器技术手册里的Total Output Error具体指什么？