I have got this code which insert Assembly code into C code. How can the parameter of the function,tx_buffer be passed into the assembly? Also what is the value of R7 in the first line? And how can it return a unsigned char?
unsigned char DriverLoadHeader(unsigned char tx_buffer) { #pragma asm MOV A, R7 MOV R1, A INC R1 MOV R0,#HEADER_SIZE ;Reset to TX FIFO MOV A, #10 MOV DPTR, #SCR2 MOVX @DPTR, A MOV DPTR, #TX_FIFO LOAD_LOOP: MOV A, @R1 MOVX @DPTR, A INC R1 DJNZ R0,LOAD_LOOP #pragma endasm return 1; }