7u83/flashled8051
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Puts out a counter now

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7u83 2024-05-18 14:44:16 +02:00
parent 47723bc655
commit f5eb532f23
1 changed files with 16 additions and 5 deletions
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21
flash.c
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@ -2,16 +2,21 @@
#include <8052.h> #include <8052.h>
#ifndef FLASH_PIN #ifndef FLASH_PIN
#define FLASH_PIN _P1_0 #define FLASH_PIN _P2_0
#endif #endif
#ifndef IRQFREQ #ifndef IRQFREQ
#define IRQFREQ 1000L #define IRQFREQ 1000L
#endif #endif
#ifndef T0_BITS
#define T0_BITS 13
#endif
#define FOSC (SYSCLK*1000L) #define FOSC (SYSCLK*1000L)
#define T0_1MS (65536L-FOSC/12L/IRQFREQ) #define T0_1MS ((65536)-FOSC/12L/IRQFREQ)
#define TCT IRQFREQ/2-1 #define TCT IRQFREQ/2-1
@ -19,9 +24,13 @@ unsigned char ctr_l = TCT&0xFF;
unsigned char ctr_h = (TCT>>8)&0xff; unsigned char ctr_h = (TCT>>8)&0xff;
unsigned char ctr_w = (TCT>>16)&0xff; unsigned char ctr_w = (TCT>>16)&0xff;
unsigned char counter = 0;
void handler() __interrupt 1 void handler() __interrupt 1
{ {
EA=0; EA=0;
TL0 = (T0_1MS) & 0xFF; // Initial timer value
TH0 = T0_1MS>>8; // Initial timer value
__asm __asm
mov a, #0xff mov a, #0xff
dec _ctr_l dec _ctr_l
@ -31,9 +40,12 @@ void handler() __interrupt 1
dec _ctr_w dec _ctr_w
cjne a,_ctr_w, 00001$ cjne a,_ctr_w, 00001$
cpl FLASH_PIN ; cpl FLASH_PIN
__endasm; __endasm;
counter ++;
P2 = counter ^0xff;
ctr_l = TCT&0xFF; ctr_l = TCT&0xFF;
ctr_h = (TCT>>8)&0xff; ctr_h = (TCT>>8)&0xff;
ctr_w = (TCT>>16)&0xff; ctr_w = (TCT>>16)&0xff;
@ -47,12 +59,11 @@ void handler() __interrupt 1
void main() void main()
{ {
P1=TMOD; P1=TMOD;
EA=0; EA=0;
TMOD =0; TMOD =1;
P1=TMOD; P1=TMOD;
TL0 = (T0_1MS) & 0xFF; // Initial timer value TL0 = (T0_1MS) & 0xFF; // Initial timer value