LPC1788--TIMER匹配中断设置--寄存器操作

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简单记录LPC1788定时器匹配中断设置--通过寄存器直接操作

1. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#include "timer_lpc1788.h"</font>
   
2. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#include "uart_lpc1788.h"</font>
   
3. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">void TIMER0_IRQHandler(void)    //TIMER0中断函数</font>
   
4. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">{</font>
   
5. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">    if(((LPC_TIM0->IR) &(1<<0))==(1<<0))  //匹配中断发生</font>
   
6. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   {</font>
   
7. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">       UARTSendStr("CLOS\r\n");</font>
   
8. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   }</font>
   
9. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->IR |=(1<<0);//清除匹配中断标志位</font>
   
10. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">}</font>
    
11. 
    
12. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">void TIMER0_Init(uint32_t clk, uint32_t howtime)</font>
    
13. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">{</font>
    
14. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_SC->PCONP|=(1<<1);//打开TIMER0外设时钟</font>
    
15. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
16. </font>
    
17. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->CTCR &=(~0x03);//计数控制寄存器</font>
    
18. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->CTCR |=0x00;//定时器模式</font>
    
19. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">//----PC=PR-----TC++</font>
    
20. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->TC =0;//定时计数器</font>
    
21. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->PR =0;//预分频寄存器</font>
    
22. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->PC =0;//预分频计数器</font>
    
23. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
24. </font>
    
25. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->TCR |=(1<<1);  //定时器控制寄存器--复位定时器</font>
    
26. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->TCR &=~(1<<1);   //清除复位</font>
    
27. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
28. </font>
    
29. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->PR =(clk/1000000-1);//预分频寄存器--系统外设时钟/1000000=1us需要的PC值</font>
    
30. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
31. </font>
    
32. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->IR=0xFFFFFFFF;   //清除中断</font>
    
33. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">//--------------------</font>
    
34. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->MR0=howtime;//匹配寄存器---多少个1us将匹配</font>
    
35. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->MCR &=~(0x07);  //匹配控制寄存器--禁止匹配-复位-停止产生的中断</font>
    
36. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->MCR |=(1<<0); //允许匹配中断</font>
    
37. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->MCR |=(1<<1); //允许复位中断--匹配时TC复位-重新计数</font>
    
38. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
39. </font>
    
40. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   NVIC_SetPriority(TIMER0_IRQn, ((0x01<<3)|0x01));  //设置定时器中断优先级</font>
    
41. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
42. </font>
    
43. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   NVIC_EnableIRQ(TIMER0_IRQn);   //定时器中断使能</font>
    
44. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
45. </font>
    
46. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">
    
47. </font>
    
48. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">   LPC_TIM0->TCR |=(1<<0);;  //启动定时器</font>
    
49. <font size="4" style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">}</font>

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