Re: [uracoli-devel] Baud rates

[Axel Wachtler]

Hallo,

On 15.05.2012 21:13, Joerg Wunsch wrote:
> As Daniel Thiele wrote:
>
> > Probably the internal RC oscillator is calibrated on startup, using
> > CLKM of the transceiver as reference frequency.
>
> The major point here is to calibrate the RC oscillator not to
> 8 MHz but to 7.37 MHz (a "baudrate friendly" frequency).

Looks if we have a motivation for an OSCCAL routine. Here is an initial
idea, maybe we use an inline function in board*.h files that is wrapped
by a macro.

board_xxx.h
=======================================
static inline void calibrate_rc_osc(void)
{
 /* some code that depends on F_CPU */
}

#define CALIBRATE_RC_OSC() calibrate_rc_osc()
=======================================

board.h
=======================================
#ifndef CALIBRATE_RC_OSC
 #define CALIBRATE_RC_OSC()
#endif
=======================================

Axel