PIC32MZ Tutorial--Blinky LED

Today I finish the "Blinky LED" application on PIC32MZ Starter Kit. This application to LED1 blink with 0.5HZ frequence. The pseudo code is like

    LOOP        :        ledon1  second        led OFF        1 Second

It uses Timer1 to control the delay time. So first I implement the three Timer1 functions.

/** <p><b>Function:TMR1_Open</b></p> <p><b>summary:initialization of Timer & Lt;/b></p> <P><B>DESCRIPTION:TMR1 on; 0.02 microsecond every tick </b></p> <p><b>remarks:pre-scale 1:2; PB 100MHz; PR1 0xffff</b></p>*/voidTmr1_open (void) {T1con=0x8010; PR1=0xFFFF;}//Comment a function definition and leverage automatic documentation/** <p><b>Function:TMR1_Write</b></p> <p><b>summary:write tmr1</b> </p> <p><b>description:write A value to tmr1</b></p> <p><b>remarks:the valu E is range of 0~65535</b></p>*/voidTmr1_write (unsignedintvalue) {TMR1= value &0xFFFF;}/** <p><b>Function:TMR1_Read</b></p> <p><b>summary:read tmr1</b></ P> <p><b>description:read the value from tmr1</b></p> <p><b>remarks:the value I s range of 0~65535</b></p>*/unsignedintTmr1_read (void){    return(TMR1 &0xFFFF);}

Second I Finish the delay function, the implemention is like below

/** <p><b>function:delay_1s </b></p> <p><b>summary:delay using tmr1</b> </p> <p><b>description:delay One second </b></p> <p><b>remarks:call tmr1_ Open First </b></p>*/voidDelay_1s (void) {unsignedintCount = +; unsignedintTicks = -;  while(count--) {Tmr1_write (0);  while(Tmr1_read () <ticks) {            ; // do nothing        }    }}

Actually we can do this like below

/** <p><b>function:delay_1s </b></p> <p><b>summary:delay using tmr1</b> </p> <p><b>description:delay One second </b></p> <p><b>remarks:call tmr1_ Open First </b></p>*/voidDelay_1s (void) {unsignedintCount = -; unsignedintTicks = +;  while(count--) {Tmr1_write (0);  while(Tmr1_read () <ticks) {            ; // do nothing        }    }}

I prefer to the second one. I believe the second one has higher accuracy than the first one.

In the end, I finish the main function. In the last blog, I already show how to implement Led_seton. This time, we'll the same Led_seton funtion, and more, we need to implement Led_setoff. That's easy once you had read my last blog. If you don ' t know, please look at below.

#include <proc/p32mz2048ech144.h>#include"Delay.h"#include"ConfigurationBits.h"#defineLed_ioctl () trishclr = (1<<0)#defineLed_seton () Lathset = (1<<0)#defineLed_setoff () lathclr = (1<<0)#defineLed_open () Anselh &= 0xFFFFFFFEvoidMainvoid) {tmr1_open ();    Led_open ();    Led_ioctl ();  while(1) {Led_seton ();        Delay_1s ();        Led_setoff ();    Delay_1s (); }}

PIC32MZ Tutorial--Blinky LED