Hi, I am looking for a way to write some C51 functions to set or clear bits stored in the 8051 external data memory. For example, the following code was done in the 8051 assembly language:
;******************************* SYSTEM_TROUBLE1 XDATA 1000H AC_FAIL ACC.0 LOW_BAT ACC.1 . . SYSTEM_TROUBLE2 XDATA 1001H TELCO1_FAIL ACC.0 TELCO2_FAIL ACC.1 . . ;******************************* . . MOV DPTR, #SYSTEM_TROUBLE1 MOVX A, @DPTR SETB AC_FAIL MOVX @DPTR . .
try:
xdata struct { char AC_FAIL :1; char LOW_BAT :1; } SYSTEM_TROUBLE1 _at_ 0x1000; void main( void ) { SYSTEM_TROUBLE1.LOW_BAT = 1; } ; FUNCTION main (BEGIN) 0000 901000 MOV DPTR,#SYSTEM_TROUBLE1 0003 E0 MOVX A,@DPTR 0004 4402 ORL A,#02H 0006 F0 MOVX @DPTR,A 0007 22 RET ; FUNCTION main (END)