luatos-soc-air105/application/src/luat_pwm_air105.c

#include "luat_base.h"
#include "luat_pwm.h"

#include "app_interface.h"

#define LUAT_LOG_TAG "luat.pwm"
#include "luat_log.h"

int luat_pwm_setup(luat_pwm_conf_t* conf) {
    int channel = conf->channel;
	size_t period = conf->period;
	size_t pulse = conf->pulse;
	size_t pnum = conf->pnum;
	size_t precision = conf->precision;

	if (precision != 100 && precision != 1000) {
		LLOGW("only 100 or 1000 PWM precision supported");
		return -1;
	}

	switch (channel)
	{
		case 0:
			GPIO_Iomux(GPIOB_00, 2);
			break;
		case 1:
			GPIO_Iomux(GPIOB_01, 2);
			break;
		case 2:
			GPIO_Iomux(GPIOA_02, 2);
			break;
		case 3:
			GPIO_Iomux(GPIOA_03, 2);
			break;
		case 4:
			GPIO_Iomux(GPIOC_06, 2);
			break;
		case 5:
			GPIO_Iomux(GPIOC_07, 2);
			break;
		case 6:
			GPIO_Iomux(GPIOC_08, 2);
			break;
		case 7:
			GPIO_Iomux(GPIOC_09, 2);
			break;
		default:
			break;
	}

	// 主频48M
	//uint32_t hz = 48000000 / period / precision;

	//HWTimer_StartPWM(channel, hz * pulse, hz * (precision - pulse), pnum);
	HWTimer_SetPWM(channel, period, pulse * (1000 / precision), pnum);
    return 0;
}

// @return -1 打开失败。 0 打开成功
int luat_pwm_open(int channel, size_t period, size_t pulse,int pnum) {
	switch (channel)
	{
		case 0:
			GPIO_Iomux(GPIOB_00, 2);
			break;
		case 1:
			GPIO_Iomux(GPIOB_01, 2);
			break;
		case 2:
			GPIO_Iomux(GPIOA_02, 2);
			break;
		case 3:
			GPIO_Iomux(GPIOA_03, 2);
			break;
		case 4:
			GPIO_Iomux(GPIOC_06, 2);
			break;
		case 5:
			GPIO_Iomux(GPIOC_07, 2);
			break;
		case 6:
			GPIO_Iomux(GPIOC_08, 2);
			break;
		case 7:
			GPIO_Iomux(GPIOC_09, 2);
			break;
		default:
			break;
	}
	HWTimer_SetPWM(channel, period, pulse * 10, pnum);
    return 0;
}

int luat_pwm_capture(int channel,int freq) {
	return 0;
}

// @return -1 关闭失败。 0 关闭成功
int luat_pwm_close(int channel) {
    HWTimer_Stop(channel);
    return 0;
}