This was posted by Cliff Lawson on AVRFreaks. I've modified it for
GPIOR0.
------------------------
typedef struct
{
unsigned char bit0:1;
unsigned char bit1:1;
unsigned char bit2:1;
unsigned char bit3:1;
unsigned char bit4:1;
unsigned char bit5:1;
unsigned char bit6:1;
unsigned char bit7:1;
} BitRegisterType;
#ifndef true
#define true 1
#endif
#ifndef false
#define false 0
#
#define BIT_buffer_status ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit0
#define BIT_recv_error ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit1
#define BIT_active ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit2
#define BIT_use_sample1 ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit3
#define BIT_byte_count ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit4
#define BIT_receive_132 ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit5
#define BIT_wait_uart_low ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit6
#define BIT_RS232_calibrated ((volatile
BitRegisterType*)_SFR_MEM_ADDR(GPIOR0))->bit7
....
BIT_receive_132 = 1;
BIT_recv_error = 0;
if (BIT_buffer_status == 1) {}
------------------------
Best regards,
Stu Bell
DataPlay (DPHI, Inc.)
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Shaun Jackman
Sent: Wednesday, December 19, 2007 12:00 PM
To: [email protected]
Subject: [avr-libc-dev] Wishlist: place static bool in GPIO registers
The General Purpose I/O Registers (GPIOR0 through GIPOR3) are directly
bit-accessible. It would be a very handy feature to be able to place a
static bool (or any variable, I suppose) in the GPIO registers.
Cheers,
Shaun
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