Dear Russell Bull

Can you give me some tip how do i check the data is writing to cs5460a and reading from

The following the routine for read and write to cs5460a

void write_to_register(char command,char low,char mid,char high)
{
transfer_byte(command);
transfer_byte(high);
transfer_byte(mid);
transfer_byte(low);

}

void read_register(char command)
{
transfer_byte(command);
high_byte = receive_byte(); /*Receive Bytes*/
mid_byte = receive_byte();
low_byte = receive_byte();

}


NAME TRANSFER_BYTE

?PR?_transfer_byte?TRANSFER_BYTE SEGMENT CODE
PUBLIC _transfer_byte

RSEG ?PR?_transfer_byte?TRANSFER_BYTE
_transfer_byte:
USING 0
MOV A, R7 ; Move byte to be transmitted to ACC
MOV R1,#08 ; Set count to 8 to transmit byte
CLR P1.1 ; Clear SCLK( old data P1.3)

loop: ; Send Byte
RLC A ; Rotate Accumulator, send MSB 1st
MOV P1.2,C ; Transmit MSB first through C bit
SETB P1.1 ; Set SCLK (old data P1.3)
CLR P1.1 ; Clear SCLK
DJNZ R1,loop ; Decrement byte, repeat loop if not zero
SETB P1.2 ; Reset SDI to one when not transmitting( old data P1.3)
RET ; Exit subroutine



END ; END OF _transfer_byte

NAME RECEIVE_BYTE

?PR?_receive_byte?RECEIVE_BYTE SEGMENT CODE
PUBLIC _receive_byte


RSEG ?PR?_receive_byte?RECEIVE_BYTE
_receive_byte:
USING 0
MOV R1,#08 ; Set count to 8 to receive byte
SETB P1.1 ; Set SDI when not in use

LOOP: ; Receive the byte
MOV C,P3.5 ; Move bit to carry ( old data P1.2)
RLC A ; Rotate A in preparation for next bit
SETB P1.1 ; Set SCLK ( old data P1.3)
CLR P1.1 ; Clear SCLK
DJNZ R1,LOOP ; Decrement byte, repeat loop if not zero

MOV R7,A ; Byte to be returned is placed in R7
RET ; Exit subroutine


; END OF _receive_byte

END

I have initializated the serial port using sync1(0xff) and sync0(oxfe) but still i am not able to read can tell me what could be the problem.

Thanks