Hello everybody,
today I started to port the AT86RF2XX driver for the MRF24J40 radio module.
Hier I have 2 question:
1. At the module initialization I found the following comment:
/**
* @brief Set the transmission power of the given device [in dBm]
*
* If the device does not support the exact dBm value given, it will
set a value
* as close as possible to the given value. If the given value is
larger or
* lower then the maximal or minimal possible value, the min or max
value is
* set, respectively.
*
* @param[in] dev device to write to
* @param[in] txpower transmission power in dBm
*/
void at86rf2xx_set_txpower(at86rf2xx_t *dev, int16_t txpower);
How should the txpower be coded? A int16 value in dBm ??? I don't
understand this.
The Atmel AT86RF231 has a tx-power range from -17dBm to +3dBm and the
MRF24J40
has a range from -30 to 0dBm. How fits this together with that comment
above?
2. From where could I get as fast as possible some OpenLabs 802.15.4
modules (delivery should be in 2-3 days, prefered in Germany)? At the
store of OpenLabs there is mentioned a
delivery time from about 2 weeks....this is to long for my purpose.
Best regards
Bernhard
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