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Code for ADE7756 ?

 
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tomi7



Joined: 15 Sep 2004
Posts: 5

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Code for ADE7756 ?
PostPosted: Mon Sep 27, 2004 12:01 pm     Reply with quote
Has anybody write code for ADE7756 ?
I have started project power meter and I'm looking for example.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Sep 27, 2004 4:04 pm     Reply with quote
Analog Devices has ASM code for a 16F873 here:
http://www.analog.com/UploadedFiles/Associated_Docs/317740795RMS_CODE.txt
You could translate it to C.

For example, this section of the ASM code sets up the SPI module:
Code:
;---------setup spi port for 7756 communication-------------------
; movlw  B'00000010' ;set up spi as master fos/64 idle state high
  movlw  B'00000001' ;set up spi as master fos/16 idle state high
; movlw  B'00000000' ;set up spi as master fos/4 idle state high
  movwf  SSPCON      ; mov w to spi control register
  movlw  B'00000000'
  bsf    STATUS,5    ;set to bank 1
  movwf  SSPSTAT     ;set up clk edges
  bcf    STATUS,5    ;set to bank 0
; movlw  B'00100000' ;set up spi as master fos/4 idle state high
; movlw  B'00100001' ;set up spi as master fos/16 idle state high
; movwf  SSPCON      ;mov w to spi control register

  bsf    SSPCON,5

If you study that code, and then also study the ASM code generated
by the CCS compiler for the setup_spi() library function, then you
can see that this line of C code does the same thing:
Code:
setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_CLK_DIV_16);


That's probably the easy part. If I was writing the driver, I would look
at page 5 of the ADE7756 data sheet which shows the SPI read and
write timing diagrams. I would use CCS library functions to do the
same thing as shown in the diagrams.
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