Notes

Bit Numbers

Use # in front of the number, so bit 0 is "#0"

Special Function Registers

You can use SFR's in the assembler directly instead of including via an input or output.  Doing this is faster as the compiler won't move the SFR via W0 and instead will access it directly.

Multiple Assembler Statements

Use "/n" to seperate multiple assemlber commands

Using Assembler


      asm ( "instruction" );


      asm volatile ("mov %0,w0"     
      :                                   //Outputs
      : "g" (pic_address.word.MSW)        //Inputs
      : "w0");                            //Clobbers
      asm volatile ( "mov w0,TBLPAG" );


      asm volatile ("mov %0, w2"
      :                                   //Outputs
      : "g" (data_l)                      //Inputs
      : "w2");                            //Clobbers

      asm volatile ("goto %0"
      :                                   //Outputs
      : "g" (FLASH_FIRMWARE_START_ADDRESS)      //Inputs
      );                                  //Clobbers

Wait for IRQ bit to be set while loop in assembler

	//while (!IFS0bits.T2IF)
	//	;
	//LATDbits.LATD0 = 0;
	//Assembler equivalent:
	__asm__ volatile ("loop1: btss IFS0,#7 \n goto loop1 \n bclr LATD,#0"
	:							//Outputs
	:							//Inputs
	: );						//Clobbers
Move register to port at specific moment

	__asm__ volatile ("mov %0,W0 \n setm LATD \n nop \n nop \n nop \n mov W0,LATD"
	:							//Outputs
	: "g"(data_out)				//Inputs
	: "w0");					//Clobbers

 

 

 

 

 

 

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