59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#include "hal_defs.h"
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#include "hal_led.h"
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#include "TIMER.h"
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uint8 SEND_DATA_FLAG = 0;
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uint16 NUM = 0;
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void Timer4_Init(void)
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{
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// Set prescaler divider value to 128 (32M/128 = 250KHZ)
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T4CTL |= 0xE0;
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T4CTL &= ~(0x10); // Stop timer
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T4CTL &= ~(0x08); // 禁止溢出中断
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T4CTL |= 0x04; //计数器清零
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T4IE = 0; // Disable interrupt
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}
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void Timer4_On(void)
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{
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T4CTL |= 0x08; //使能溢出中断
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T4CTL &= ~(0x03);//0x00-0xFF
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T4CTL |= 0x10; // Start timer
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T4IE = 1; // Enable interrupt
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SEND_DATA_FLAG = 0;
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}
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void Timer4_Off(void)
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{
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T4CTL &= ~(0x08); // 禁止溢出中断
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T4CTL &= ~(0x10); // Stop timer
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T4IE = 0; // Disable interrupt
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}
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uint8 GetSendDataFlag(void)
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{
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return SEND_DATA_FLAG;
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}
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HAL_ISR_FUNCTION(T4_ISR, T4_VECTOR)
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{
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T4OVFIF = 0;
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T4IF = 0;
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NUM ++;
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if(NUM == 1953) //定时2s，翻转一次（1/250000*256）这是进一次中断所需要的时间，进781次中断大约是0.8s
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{
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NUM = 0;
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SEND_DATA_FLAG = 1;
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//halLedToggle(1);
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Timer4_Off();
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}
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else
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{
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SEND_DATA_FLAG = 0;
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}
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} |