Thanks Cory. Before I go any further, is there a minimum to the reference
voltage? I'm going for a ceiling of 60 mV.
Dan
On 5/30/07, Cory Sharp <[EMAIL PROTECTED]> wrote:
Dan, it sounds like you've done everything necessary. Try bypassing the
TinyOS MSP430 ADC components and check the ADC by directly setting the
MSP430 control registers. Be sure to appropriately set these registers, in
particular:
P6SEL
P6DIR
ADC12CTL0
ADC12CTL1
ADC12IFG
ADC12IE
See the MSP430 User's Guide section ADC12 for appropriate values. Then
trigger a conversion with
ADC12CTL0 |= ENC | ADC12SC;
ADC12CTL0 &= ~ADC12SC;
You can throw together a quick and dirty ADC interrupt handler like this
TOSH_SIGNAL(ADC_VECTOR) {
uint16_t iv = ADC12IV;
if( iv == 0x06 ) {
ADC12IE = 0;
reading = ADC12MEM0;
post readDone();
}
}
- Cory
On 5/30/07, Dan Steingart < [EMAIL PROTECTED]> wrote:
> Hello all,
>
> I've combed the interweb, moved a jumper that was roughly the size of a
> grain of sand, and picked through Redfern's brain to the point where he said
> "read the MSP430 manual", but I can't seem to get the external reference
> going on my Tmote Sky.
>
>
> things I've done
>
> - In my ADC header file I changed the VRef to VeRef
> - Moved the jumper over
> - Fed the ref voltage to ADC0 (port 60, correct?)
> - Turned ADC0 into an Input pin with MSP430GeneralIO
>
> Is there something blatantly wrong here? Is there a contrib file or
> other example I'm missing?
>
> Thanks in advance,
>
> Dan
>
>
>
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> Tinyos-help@Millennium.Berkeley.EDU
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>
>
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