Lpc2000

I've been using SPI0 in master mode to control a MAX3100 serial port 
with no problems at all. Never used it in slave mode, though.

Guille

--- In lpc2000@yahoogroups.com, jk jlkj <njad2002@...> wrote:
>
> Hi John,
>    
>   Your mail has releived me. I thought i was the only one to face 
problems with the SPI of phillips. I was facing a similar problem 
like yours. I have been able to solve the problem partly.
>   i.e.
>   1. The miror image problem. can be solved by using the opposite 
modes in the master and slave side i.e if master is MSB the slave 
should be LSB.
>    
>   I am still facing a similar problem like yours, which i have not 
been able to solve as yet.
>   I am unable to get the SPI working on power up reset, i.e all the 
other peripherals work perfect other than SPI. I have used SPI 
interrupts, & I have to short the reset pin momentarily to ground and 
reset the controller to make the SPI start working. I hope some one 
can help me with this problem. 
>    
>   SPI is really nagging me. Its been over a month now, and i have 
not been able to get the SPI work on power UP.
>    
>   Regards,
>   Jerome
>    
>   
> 
> johnleerberg <johnleerberg@...> wrote:
>   Hi All
>       I have been working with the LPC2138 for about 12 months on 
and 
> off and have had NO problems with getting any of the peripherals 
> working until now. 
> 
> I have two LPC2138's connected via SPI0 and am intending to setup 
one 
> as a master and the other a slave that adds two serial ports to my 
> master.
> 
> There are two issues:
> 
> 1) With MOSI to MOSI, P1.24 (master) to SSEL0 (slave), SCLK0 to 
SCLK0 
> and MISO floating i am seeing a mirror of what is being transmitted 
> by the master on the MISO pin of the slave????? And i mean a 
perfect 
> mirror with no time shift, with the 4 channel CRO i am using i can 
> overlay one waveform ontop of the other and they match perfectly. 
Yes 
> i have put a multimeter across the pins to check for conductivity 
and 
> no there is no solder across the MOSI and MISO.
> 
> 2) I can get the SPI interrupt the fire on both the master and the 
> slave but randomly the master will just lock up (something i have 
> never had happen before). Also the upon power reset the SPI wont 
> start but the serial port start perfectly everytime.
> My program has three basic sections
> a) In main i call an init interrupt routine which initialises the 
SPI 
> port on the master.
> b) In my ISR i read the S0SPSR (clear it), write 0xA0 to S0SPCR, 
> clear the interrupt by writing 0x01 to S0SPINT, clear the 
VicVectAddr.
> c) In main i write 0x5A to S0SPDR then wait 4ms and repeat (while
(1) 
> loop)
> 
> If anyone can help me it would be greatly appreciated.
> 
>    
> 
> 
> 
> 
> 
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