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From: sylvain.azarian on 20 Mar 2010 15:53
Good evening all.
My design has a chip connected to a FX2LP ( 100 pins). The firmware,
written and compiled with SDCC, works except access to the E port...


I've tried several stuffs, like putting my "toggling code" into existing
code and came to the conclusion that something is missing in my
initialization code. In clear : I am not able to read or write to port E.
An oscilloscope connected to any of the 8 pins doesn't show anyhting, pin
stay "silent".

The code below is what remains after removing everything not related to the
issue... and doesn't work :-(

If any of you has the "good eye" and can tell me what I've missed... that
would help ;-)

===============================================================

#define ALLOCATE_EXTERN
#include "include/fx2regs.h"


#define SYNCDELAY _asm \
nop; \
nop; \
nop; \
nop; \
nop; \
nop; \
nop; \
_endasm;
static void Initialize(void)
{
CPUCS=0x12; // 48 MHz, CLKOUT output enabled.
IFCONFIG=0xc0; SYNCDELAY; // Internal IFCLK, 48MHz; A,B as normal
ports.
CKCON &= ~7;
EXIF &= ~16;
REVCTL=0x03; SYNCDELAY; // See TRM...

OEA = OEB = OED = 0xff; SYNCDELAY;
IOA = IOB = IOD = 0xff; SYNCDELAY;
OEA = OEB = OED = 0xff; SYNCDELAY;
IOA = IOB = IOD = 0x00; SYNCDELAY;

EP6CFG=0xe2; SYNCDELAY; // 1110 0010 (bulk IN, 512 bytes,
double-buffered)
FIFORESET=0x80; SYNCDELAY; // NAK all requests from host.
FIFORESET=0x82; SYNCDELAY; // Reset individual EP (2,4,6,8)
FIFORESET=0x84; SYNCDELAY;
FIFORESET=0x86; SYNCDELAY;
FIFORESET=0x88; SYNCDELAY;
FIFORESET=0x00; SYNCDELAY; // Resume normal operation.
}



void main(void)
{
Initialize();

PORTACFG = 0 ;
PORTCCFG = 0 ;
PORTECFG = 0 ; // disable all alternate functions on port E
SYNCDELAY;
IOE = 0x00 ; //
OEE = 0xff ; // all pins are outputs
SYNCDELAY;

while( 1 ) {
SYNCDELAY;
IOE = 0xff ; // all pins should be 1
SYNCDELAY
IOE = 0x00 ; // all pins should be 0
}
}

====
Can't see anything on port E...
thanks



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