w801 开发板呼吸灯

CV 大法直接贴源码

#include "wm_include. h"
#include "wm_gpio_afsel. h"
//#include "wm_cpu. h"
// extern int pwm_demo (u8 channel,  u16 freq,  u8 duty,  u8 mode,  u8 num) ; 
volatile int pwmend = 0; 

u8 duty = 255,  a = 1; 
void pwmcb () 
{
    pwmend = 1; 
}
void UserMain (void) 
{
    printf ("\n user task \n") ; 
    u8 channel = 3; 
    u8 freq = 100; 
    u8 pnum = 1; 

    //pwm_demo (channel, freq, dute, 4, pnum) ; 
    //  为使用 w801 开发板上的 led, 请参考 pwm_demo
    wm_pwm3_config (WM_IO_PB_25) ; //使用 pwm3
    tls_pwm_stop (channel) ; 
       int ret = tls_pwm_init (channel,  freq,  duty,  pnum) ; //设置 pwm
    if (ret ! = WM_SUCCESS) 
    {    
        printf ("pwm err") ; 
        return; 
    }
    //  为使用 w801 开发板上的 led
    
    tls_pwm_stoptime_irq_cmd (channel,  true) ; //pwm 停中断
    tls_pwm_isr_register (pwmcb) ; //注册中断
    tls_pwm_start (channel) ; //pwm 开始

    while (1)  {
    if (pwmend == 1)  {
        tls_reg_write32 (HR_PWM_INTSTS, BIT (channel) ) ; //清中断

        if (duty == 255) 
        {
            a = -1; 
            printf ("-") ; 
        }
        if (duty == 1) 
        {
            a = 1; 
            printf ("+") ; 
        }
        duty += a; 
        //printf ("%d ", duty) ; 
        pwmend = 0; 
        //tls_os_time_delay (500) ; 
        tls_pwm_duty_set (channel,  duty) ; //调占空比
    }
    }
#if DEMO_CONSOLE
//    CreateDemoTask () ; 
#endif
    //用户自己的 task
}