Lpc2000

Paul,

> IOR and IOW are gated
I didn't see that LOL!! But why olimex did that anyways? weard!

>What's your cs8900a_write function
I removed the changes and trying to use this one unmodefied

void cs8900a_write(unsigned addr, unsigned int data) {
  pAdd_CS = (unsigned char*)(CS8900A_BASE+addr);
  *pAdd_CS = data;
  ++pAdd_CS;
  *pAdd_CS = data>>8;
}

Gus
--- In lpc2000@yahoogroups.com, "Paul Curtis" <plc@r...> wrote:
> Gus, 
> 
> > > chip is always selected using /CHIPSEL as it will only present 
or 
> > > latch data on an IOR or IOW strobe.
> 
> > Yes that is correct but we have FLASH and RAM on the bus!!! 
> > when RD is strobed for RAM read, the ethernet chip will 
> > access the data bus. 
> > I could be wrong somehow!
> 
> IOR and IOW are gated using CS2 (look down by the copyright symbol)
> hence even though CHIPSEL is always selected, you won't get an IOR 
or
> IOW strobe unless CS2 is selected, I think--I'm not particularly 
good
> with this type of thing.
> 
> > I am trying to do it in 8-bit now, was 16!! I just want to 
> > get it to work for a starter. I am using the code posted on 
> > olimex website
> > 
> > unsigned short cs8900a_read(unsigned addr) {
> >   unsigned short Data1,Data2;
> >   pAdd_CS = (unsigned char*)(CS8900A_BASE+addr);
> >   Data1 = *pAdd_CS;
> >   Data2 = ((*++pAdd_CS) << 8);
> >   return(Data1|Data2);
> >   // the folowing should work as well since we have 16 bit 
> > bus  // return *((unsigned short *)(CS8900A_BASE+addr)); } 
> > void cs8900a_write(unsigned addr, unsigned int data) {
> >   pAdd_CS = (unsigned char*)(CS8900A_BASE+addr);
> >   *pAdd_CS = data;
> >   ++pAdd_CS;
> >   *pAdd_CS = data>>8;
> > }
> 
> This sort of looks OK modulo volatile.
> 
> > void cs8900a_init(void)
> > {
> > int i;
> > // I am using this since the folowing code will not work   
> > BCFG2=0x00003501;
> >  /*
> >   // CS8900A 8bit;
> >   BCFG2_bit.MW = 0;
> >   // IDCY = 1+1 ~ 33ns
> >   BCFG2_bit.IDCY=1;
> >   // WST1 = 8+3 (read)  ~183ns
> >   BCFG2_bit.WST1=8;
> >   // WST2 = 6+1 (write) ~ 117ns
> >   BCFG2_bit.WST2=6;
> >   // RBLE = 1 - ako e 0 ne zapiswa
> >   BCFG2_bit.RBLE = 1;
> >   // WP =0, BM = 0
> >   BCFG2_bit.WP = BCFG2_bit.BM = 0;
> > //*/
> > // this code was not changed from the example
> >   // P3.25 - CS2 (CS8900A)
> >   // P3.0 - A0
> >   PINSEL2 |= 0x00804000;
> > //read chip id
> >  cs8900a_write(ADD_PORT,0);
> >   i = cs8900a_read(DATA_PORT);
> >   if (i != CRYSTAL_SEMI_ID)
> >     while(1);
> > // read revesion
> >   cs8900a_write(ADD_PORT,0x2);
> >   i = cs8900a_read(0xC);
> > // i will still be the "manufacture id" no matter what 
> > register I select
> 
> Need to assume that the bitfield stuff workds of course.  It seems 
you
> probably haven't written the address correctly in the first place 
and
> the address port defaults to zero.  What's your cs8900a_write 
function
> like after you modified it?
> 
> Also, have you reset the CS8900A and waited for it to come out of 
reset?
> 
> 
>   // Reset the CS8900A
>   cs8900a_write(ADD_PORT, PP_SelfCTL);
>   cs8900a_write(DATA_PORT, POWER_ON_RESET);
> 
>   // Wait until chip-reset is done
>   cs8900a_write(ADD_PORT, PP_SelfST);
>   while ((cs8900a_read(DATA_PORT) & INIT_DONE) == 0)
>     ;
> 
> I don't know whether this makes any difference or not, or is the
> manufacturing data only available after a POR or somesuch?
> 
> --
> Paul Curtis, Rowley Associates Ltd  http://www.rowley.co.uk
> CrossWorks for MSP430, ARM, AVR and (soon) MAXQ processors
> 
> --
> Paul Curtis, Rowley Associates Ltd  http://www.rowley.co.uk
> CrossWorks for MSP430, ARM, AVR and (soon) MAXQ processors