Lpc2000

Have you looked at the peripheral power-control register (PCONP)
setting?

We had a similar problem a while back (see message 8441). It turned 
out this had to be set explicitely to enable teh 2nd ADC: the 
maunual's description of the default setting turned out to be wrong.

Regards
Brendan


--- In lpc2000@yahoogroups.com, "gaquaycalifornia" 
<gaquaycalifornia@...> wrote:
>
> Hi,
> Please help with the Adcs.
> I having problem of reading conversion from ADC_1.
> LPC2134/6/8 have two ADCs and 16 pins to connect to.
> I wrote the following code. and it runs fine in the evaluation 
board 
> LPC2138, but not the target board LPC2134.
> Here is what I did.
> Initialize ADC0
> Initialize ADC1
> Both has interrupt vectors assigned to.
> 
> #define configure_adc_0 0x01215F00
> #define configure_adc_1 0x01215F00
> 
> void adc_0_initialize (int * p, int lastchannel)
> {
> 	index_0 = 0;
> 	memcpy(&x[0], p,32);
> 	lastchannel_adc_0 = lastchannel; 
> 	VICVectAddr3 = (unsigned long)adc0_irq;			
> 	VICVectCntl3 = 0x32; 				    	
> 	VICIntEnable |= VIC_BIT(VIC_ADC_0);			
> 	AD0CR   = configure_adc_0 | Find_Next_Channel(lastchannel,0) ;
> }
> void adc_1_initialize (int * p, int lastchannel)
> {
> 	index_1 = 0;
> 	memcpy(&y[0], p,32);
> 	lastchannel_adc_1 = lastchannel; 
> 	VICVectAddr10 = (unsigned long)adc1_irq;		
> 	VICVectCntl10 = 0x35; 				    	
> 	VICIntEnable |= VIC_BIT(VIC_ADC_1);			
> 	AD1CR   = configure_adc_1 | Find_Next_Channel(lastchannel,1) ;
> }
> // to start both ADCs
> void StartAdcs(void){
> 	ADGSR = 0x01010000;
> }
> // isr of adc0
> void adc0_irq (void) __irq
> {
> 	int chan, tmp;
> 	unsigned short val;
> 	tmp = AD0DR;
> 	chan = ((tmp >> 24)& 0x07); 
> 	val =  (unsigned short)((tmp >> 6 )& 0x3FF);
> 	result_0[index_0][chan] = val;
> 	index_0 = IncrementInindex(index_0,chan,0);
> 	AD0CR  = configure_adc_0 | Find_Next_Channel(chan,0) ;
> 	VICVectAddr = 0; 					
> }
> // isr of adc1
> void adc1_irq (void) __irq
> {
> 	int chan, tmp;
> 	unsigned short val;
> 	tmp = AD1DR;
> 	chan = ((tmp >> 24)& 0x07); 
> 	val =  (unsigned short)((tmp >> 6 )& 0x3FF);
> 	result_1[index_1][chan] = val;
> 	index_1 = IncrementInindex(index_1,chan,1);
> 	AD1CR   = configure_adc_1 | Find_Next_Channel(chan,1) ;
> 	VICVectAddr = 0; 					
> 				
> }
> 
> On the evaluation board which has LPC2138 it runs fine, both 
> interrupt got triggered.
> When move this code onto the target with a LPC2134, only adc0 gets 
> triggerd.
> 
> Please take a look and help me with any ideas
> 
> thanks
>