[C++知识库]基于杰理AC7911BA的PWM输出例子

#include "gpio.h"
void pwm_for_test(u32 gpio)
{
	JL_TIMER_TypeDef *TMR = JL_TIMER2;

	if(TMR == JL_TIMER2){
		if(gpio != IO_PORTH_06){
			JL_IOMAP->CON3 &= ~(0xf << 24);
			JL_IOMAP->CON3 |= (0xe << 24);
			JL_IOMAP->CON6 &= ~BIT(18);//取消占用固定IO
		}else{
			JL_IOMAP->CON6 |= BIT(18);
		}
	}
	if(TMR == JL_TIMER3){
		if (gpio != IO_PORTC_10) {
			JL_IOMAP->CON3 &= ~(0xf << 28);
			JL_IOMAP->CON3 |= (0xf << 28);
			JL_IOMAP->CON6 &= ~BIT(19);//取消占用固定IO
		} else {
			JL_IOMAP->CON6 |= BIT(19);
		}
	}
	gpio_direction_output(gpio, 0);
	if ((TMR == JL_TIMER2 && gpio != IO_PORTH_06) || (TMR == JL_TIMER3 && gpio != IO_PORTC_10)) {
		gpio_set_pull_up(gpio, 1);
		gpio_set_pull_down(gpio, 1);
		gpio_set_die(gpio, TMR == JL_TIMER3 ? 1 : 0);
		gpio_direction_output(gpio, 1);
	}

	TMR->CON = 0;
	TMR->CNT = 0;
	TMR->CON |= BIT(14)|BIT(8);
	TMR->PRD = 6;  //这里设置6也是对lsb_clk进行6分频，3/6表示占空比
  TMR->PWM = 3;
//	TMR->CON |= 1 << 4; //lsb_clk分频
	TMR->CON |= BIT(0);
}