I am using TIMER1 interrupts to create a long delay with a PIC16F723A.
The C code is simple and it is similar to the example in the manual of the compiler (example in the manual is for TMR0).
The C code is simple and it is similar to the example in the manual of the compiler (example in the manual is for TMR0).
Code:
52: // Interrupt Service Routine (ISR)
53: void interrupt ISR(void){
004 00FE MOVWF 0x7e
005 0E03 SWAPF 0x3, W
006 00F7 MOVWF 0x77
007 0804 MOVF 0x4, W
008 00F8 MOVWF 0x78
009 080A MOVF 0xa, W
00A 00F9 MOVWF 0x79
00B 1283 BCF 0x3, 0x5
00C 1303 BCF 0x3, 0x6
00D 087F MOVF 0x7f, W
00E 00FA MOVWF 0x7a
00F 118A BCF 0xa, 0x3
010 28A3 GOTO 0xa3
54: if (TMR1IF && TMR1IE) {
0A3 1C0C BTFSS 0xc, 0
0A4 28A6 GOTO 0xa6
0A5 28A7 GOTO 0xa7
0A6 28B8 GOTO 0xb8
0A7 1683 BSF 0x3, 0x5
0A8 1303 BCF 0x3, 0x6
0A9 1C0C BTFSS 0xc, 0
0AA 28AC GOTO 0xac
0AB 28AD GOTO 0xad
0AC 28B8 GOTO 0xb8
55: TMR1IF=0;
0AD 1283 BCF 0x3, 0x5
0AE 1303 BCF 0x3, 0x6
0AF 100C BCF 0xc, 0
56: ++tick_count;
0B0 3001 MOVLW 0x1
0B1 07AC ADDWF 0x2c, F
0B2 1803 BTFSC 0x3, 0
0B3 0AAD INCF 0x2d, F
0B4 3000 MOVLW 0
0B5 07AD ADDWF 0x2d, F
0B6 28B8 GOTO 0xb8
57: return;
0B7 28B8 GOTO 0xb8Isn't the compiler supposed tp generate a RETFIE instruction (stack popped and GIE bit enabled upon return from interrupt)??
It should be evident in the disassembly listing generated by MPLAB, shouldn't it?Any comments?
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