Subject:
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RE: SPI problems
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 19 Jul 1998 14:46:24 GMT
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Original-From:
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Germán Gentile <ggentile@cvtciSPAMCAKE.com.ar>
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Viewed:
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3562 times
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Serial libraries are wwriten for Serial port,not for SPI port! Are you
needing use the spi like a standard oitput port or like a SPI (synchronus
serial port)???? Is the device spi compatiible? If yes, you need the portd
to work like a SPI port. if not just use like a standard i/o port , and use
the imagination ... :)
german gentile
> -----Original Message-----
> From: Ilya [mailto:ilya@flight.uchicago.edu]
> Sent: Jueves 16 de Julio de 1998 18:51
> To: handyboard@media.mit.edu
> Subject: SPI problems
>
>
>
>
> I am trying to connect my Handyboard with a Motorola 68HC11A1FN chip
> inside with a AD7858L- 12-bit ADC.
>
> In my IC code I first write to the DDRD (Port D Data Direction Register)
> ($1009) and activate SCK(bit4), MOSI(bit3), MISO(bit2).
> Then I write to SPCR (SPI Control Register and set bits 7(SPIE), 6(SPE),
> 4(MSTR), 2(CPHA), 1(SPR1).
> Following I use serial_putchar() from the serialio.c library to initialize
> the ADC... so far so good... no errors reported...
> The ADC then is supposed to make a conversion and relay the data back to
> the Handyboard via SPI. I use serial_getchar()
>
> v1 =(float)serial_getchar();
>
> and the Handyboard crashes.. at least the heart on the LCD stops
> beating..
> serialio.c is loaded on my handyboard! Was the serialio.c library written
> for SPI?!?! If not then I guess I found my problem.. but if it is for SPI,
> what am I doing wrong? Are my addresses correct?
>
> Can someone please tellme the right addresses for the following:
> DDRD, SPCR SPSR, SPDR.
>
> I have read various Motorola documentations and have not came out with a
> distinct answer for my HC11A1FN chip. I have also found contradicting
> values for the HC11 family so I am completly lost! The program did not
> work when I tried to manually receive/send data through SPI.
>
> Please help!
>
>
> All of the requests will be kindly appreciated!
>
> Thanks in advance
>
> Ilya
>
>
>
>
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Message is in Reply To:
 | | SPI problems
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| I am trying to connect my Handyboard with a Motorola 68HC11A1FN chip inside with a AD7858L- 12-bit ADC. In my IC code I first write to the DDRD (Port D Data Direction Register) ($1009) and activate SCK(bit4), MOSI(bit3), MISO(bit2). Then I write to (...) (28 years ago, 16-Jul-98, to lugnet.robotics.handyboard)
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