/**

******************************************************************************

* @file pwm.cpp

* @author shentq

* @version V2.0

* @date 2016/08/14

* @brief ebox application example .

******************************************************************************

* @attention

*

* No part of this software may be used for any commercial activities by any form

* or means, without the prior written consent of shentq. This specification is

* preliminary and is subject to change at any time without notice. shentq assumes

* no responsibility for any errors contained herein.

* <h2><center>&copy; Copyright 2015 shentq. All Rights Reserved.</center></h2>

******************************************************************************

*/

/* Includes ------------------------------------------------------------------*/

#include "ebox.h"

#include "bsp_ebox.h"

/**

* 1 此例程演示了PWM操作

* 2 PWM输出频率1Khz,占空比可调的矩形波

* 3 实际运行时LED渐变

* 4 可用资源请参考ebox_pwm.h说明

*/

/* 定义例程名和例程发布日期 */

#define EXAMPLE_NAME "PWM example"

#define EXAMPLE_DATE "2018-08-08"

float x;

uint16_t y;

Pwm pwm1(&PWMLED);

void setup()

{

ebox_init();

UART.begin(115200);

print_log(EXAMPLE_NAME, EXAMPLE_DATE);

pwm1.begin(1000, 500);

pwm1.set_oc_polarity(1);//set output polarity after compare

UART.printf("max frq = %dKhz\r\n", pwm1.get_max_frq() / 1000);

UART.printf("max frq = %f\r\n", pwm1.get_accuracy());

}

int main(void)

{

setup();

while(1)

{

x = x + PI * 0.01;

if(x >= PI)x = 0;

y = 2000 - (sin(x) + 1) * 1000;

pwm1.set_duty(y);

delay_ms(10);

}

}