Lpc2000

Hello All:
	I'm working with a LPC2106 using the GCC 3.4.4 toolchain (GCC + binutils 2.15 
+ newlib 1.13).	I wrote a union and a structure to access the P0 pins 
individually, like this:

typedef struct {
	int p0	: 1;
	int p1	: 1;
	int p2	: 1;
(...)
	int p30	: 1;
	int p31	: 1;
}port_t;

typedef union {
	port_t pins;
	unsigned int reg;
} ioreg;

typedef struct {
	ioreg iopin;
	ioreg ioset;
	ioreg iodir;
	ioreg ioclr;
}gpio_t;

So I declare a pinter like

	volatile gpio_t *gpio = 0xE0028000;

If I access the registers using 

	if( gpio->iopin.reg & 0x01 )

or 

	gpio->ioset.reg |= 0x00008000;

Everithing works fine! But if I try a code like this:

	gpio->ioset.pins.p15 = 1;

To set P0.15, P0.23 and P0.31 are set too! I had tried this code in my Linux 
workstaion and it works just fine. The compiles setting I'm using are 

arm-elf-gcc -c -Wall -D GCC_ARM7 -mcpu=arm7tdmi -Tlpc2106-rom.ld -Wcast-align 
-O3

So I'm compiling it in ARM mode. Any clues? Is this a compiler issue ( I'm not 
using the right parameters)?

Thanks a lot!

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On a quiet night, you can hear Windows reboot.

Leonardo Pereira Santos
Engenheiro de Projetos
PD3 Tecnologia
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