листинг кода:
Вариант 1:
не работает с датчиками на всех выводах, кроме на 0 PIN
Код
unsigned char *ptr_dport, *ptr_pin;
unsigned char pin;
ptr_dport = (uchar*)&DDRD;
ptr_pin = (uchar*)&PIND;
pin = PD1;
*ptr_dport |= (1<<pin); //0 на линии
\ 00000004 9140.... LDS R20, pin
\ 00000008 E001 LDI R16, 1
\ 0000000A E010 LDI R17, 0
\ 0000000C ........ CALL ?S_SHL_L02
\ 00000010 .... LDI R30, LOW(ptr_dport)
\ 00000012 .... LDI R31, (ptr_dport) >> 8
\ 00000014 81A0 LD R26, Z
\ 00000016 81B1 LDD R27, Z+1
\ 00000018 911C LD R17, X
\ 0000001A 2B10 OR R17, R16
\ 0000001C 931C ST X, R17
*ptr_dport &= ~(1<<pin);//1 на линии
\ 0000002C 9140.... LDS R20, pin
\ 00000030 E001 LDI R16, 1
\ 00000032 E010 LDI R17, 0
\ 00000034 ........ CALL ?S_SHL_L02
\ 00000038 9500 COM R16
\ 0000003A .... LDI R30, LOW(ptr_dport)
\ 0000003C .... LDI R31, (ptr_dport) >> 8
\ 0000003E 81A0 LD R26, Z
\ 00000040 81B1 LDD R27, Z+1
\ 00000042 911C LD R17, X
\ 00000044 2310 AND R17, R16
\ 00000046 931C ST X, R17
?S_SHL_L02:
dec r20
brmi 0x2AA
lsl r16
rol r17
rjmp ?S_SHL_L02
ret
Вариант 1 исправленный:
так же не работает
Код
volatile unsigned char *ptr_dport, *ptr_pin;
unsigned char pin;
ptr_dport = &DDRD;
ptr_pin = &PIND;
pin = PD1;
*ptr_dport |= (1<<pin); //0 на линии
\ 00000004 9140.... LDS R20, pin
\ 00000008 E001 LDI R16, 1
\ 0000000A E010 LDI R17, 0
\ 0000000C ........ CALL ?S_SHL_L02
\ 00000010 2F30 MOV R19, R16
\ 00000012 .... LDI R30, LOW(ptr_dport)
\ 00000014 .... LDI R31, (ptr_dport) >> 8
\ 00000016 8100 LD R16, Z
\ 00000018 8111 LDD R17, Z+1
\ 0000001A 01F8 MOVW R31:R30, R17:R16
\ 0000001C 8100 LD R16, Z
\ 0000001E 2B03 OR R16, R19
\ 00000020 8300 ST Z, R16
*ptr_dport &= ~(1<<pin);//1 на линии
\ 00000030 9140.... LDS R20, pin
\ 00000034 E001 LDI R16, 1
\ 00000036 E010 LDI R17, 0
\ 00000038 ........ CALL ?S_SHL_L02
\ 0000003C 9500 COM R16
\ 0000003E .... LDI R26, LOW(ptr_dport)
\ 00000040 .... LDI R27, (ptr_dport) >> 8
\ 00000042 91ED LD R30, X+
\ 00000044 91FC LD R31, X
\ 00000046 9711 SBIW R27:R26, 1
\ 00000048 8110 LD R17, Z
\ 0000004A 2310 AND R17, R16
\ 0000004C 8310 ST Z, R17
Вариант 2:
работает, без volatile сказали что может и не заработать
Код
unsigned char *ptr_dport, *ptr_pin;
unsigned char pin;
ptr_dport = (uchar*)&DDRD;
ptr_pin = (uchar*)&PIND;
pin = 1<<PD1;
*ptr_dport |= pin; //0 на линии
\ 00000002 9110.... LDS R17, pin
\ 00000006 .... LDI R30, LOW(ptr_dport)
\ 00000008 .... LDI R31, (ptr_dport) >> 8
\ 0000000A 81A0 LD R26, Z
\ 0000000C 81B1 LDD R27, Z+1
\ 0000000E 912C LD R18, X
\ 00000010 2B21 OR R18, R17
\ 00000012 932C ST X, R18
*ptr_dport &= ~pin; //1 на линии
\ 00000022 9110.... LDS R17, pin
\ 00000026 9510 COM R17
\ 00000028 .... LDI R30, LOW(ptr_dport)
\ 0000002A .... LDI R31, (ptr_dport) >> 8
\ 0000002C 81A0 LD R26, Z
\ 0000002E 81B1 LDD R27, Z+1
\ 00000030 912C LD R18, X
\ 00000032 2321 AND R18, R17
\ 00000034 932C ST X, R18
Вариант 2 исправленный:
работает
Код
volatile unsigned char *ptr_dport, *ptr_pin;
unsigned char pin;
ptr_dport = &DDRD;
ptr_pin = &PIND;
pin = 1<<PD1;
8594 *ptr_dport |= pin; //0 на линии
\ 00000002 9110.... LDS R17, pin
\ 00000006 .... LDI R30, LOW(ptr_dport)
\ 00000008 .... LDI R31, (ptr_dport) >> 8
\ 0000000A 8120 LD R18, Z
\ 0000000C 8131 LDD R19, Z+1
\ 0000000E 01F9 MOVW R31:R30, R19:R18
\ 00000010 8120 LD R18, Z
\ 00000012 2B21 OR R18, R17
\ 00000014 8320 ST Z, R18
8596 *ptr_dport &= ~pin; //1 на линии
\ 00000024 9110.... LDS R17, pin
\ 00000028 9510 COM R17
\ 0000002A .... LDI R26, LOW(ptr_dport)
\ 0000002C .... LDI R27, (ptr_dport) >> 8
\ 0000002E 91ED LD R30, X+
\ 00000030 91FC LD R31, X
\ 00000032 9711 SBIW R27:R26, 1
\ 00000034 8120 LD R18, Z
\ 00000036 2321 AND R18, R17
\ 00000038 8320 ST Z, R18
Не работает корректно операция << в (*указатель |= (1<<pin)) IAR AVR, в железе не работает
Nov 26 2008, 12:46
и поменяю, но, я хочу понять и разобраться, почему не работает 1й вариант.
