Example code for RFM70 and ATmega88

If the compiler will generate a listing in assembley language, I'd check the "status_mask" first thing.

Hul

wzab wrote:

Thanks for the code, I'll take a look.

Can you tell me what the 'X' on the front of so many lines is for ??

Thanks

hamilton

This is a "shar" archive (according to the alt.sources convention). You can save the whole post (in an original form) and run "unshar" on it. Or you can remove all lines before the "#!/binsh" line, and run the remainder as the bash script. The above applies to Linux or other Un*x-like systems. I don't know how to unpack it in Windows (unless you make it Un*x like by installing cygwin

-- Regards, Wojtek

avr-gcc treats it just as it was a constant defined by #define. The generated code is quite efficient:

while ( (UCSR0A & status_mask) !=3D status_mask ); f6: 80 91 c0 00 lds r24, 0x00C0 fa: 80 7c andi r24, 0xC0 ; 192 fc: 80 3c cpi r24, 0xC0 ; 192 fe: d9 f7 brne .-10 ; 0xf6 /* Get and return received data from buffer */

-- Regards, Wojtek

Ooops, it seems, that the TXC0 flag is not so easy to use. It is cleared only after interrupt or after writing "1" to it (in polling mode). So the above function must be slightly modified!

static inline uint8_t USART_SPI_Transfer(uint8_t c) { const uint8_t status_mask=3D((1