使用ML51EB9AE开发板，借用库函数开发，用定时器产生PWM波，以下代码有啥逻辑问题吗

只看该作者 · 2022-1-4 15:59

#include "ML51.h"

/* if define TIMER0_FSYS_DIV12, timer = (0x1FFF-0x1000)*12/24MHz = 4.08ms */
/* if define TIMER0_FSYS, timer = (0x1FFF-0x0010)/24MHz = 340us */
#define TH0_INIT       0x10
#define TL0_INIT       0x00
#define pwm_num 1000

sbit LED = P1^4;

/************************************************************************************************************
* TIMER 0 interrupt subroutine
************************************************************************************************************/
void Timer0_ISR (void) interrupt 1          //interrupt address is 0x000B
{
   static unsigned char counter = 0;
_push_(SFRS);

TH0 = TH0_INIT;
TL0 = TL0_INIT;
TF0 = 0 ;
P32 = ~P32;                            // GPIO toggle when interrupt

   counter++;
   if(counter==1500)
counter=0;

LED = (counter<=pwm_num)?0:1;

_pop_(SFRS);
}

/************************************************************************************************************
* Main function
************************************************************************************************************/
void main (void)
{
/* As defaut all multi function define as GPIO */
ALL_GPIO_QUASI_MODE;

MFP_P32_GPIO;
P32_PUSHPULL_MODE;

   MFP_P14_GPIO;
P14_PUSHPULL_MODE;


ENABLE_TIMER1_MODE0;                      //Timer 0 mode configuration
TIMER0_FSYS_DIV12;

TH0 = TH0_INIT;
TL0 = TL0_INIT;

ENABLE_TIMER0_INTERRUPT;                   //enable Timer0 interrupt
ENABLE_GLOBAL_INTERRUPT;                   //enable interrupts

set_TCON_TR0;                            //Timer0 run

while(1);

}

只看该作者 · 2022-1-5 10:32

现在遇到什么问题呢？说一下看看。