to 22MHz . How can I write for a 15MHz frequency ?
2º- Is necessary to change anything else? Because of the frequency ? Or simply just change at the beginning of nfcemulater.h ( #define F_CPU 15000000UL ) and create a similar case like the one of the 1st point nfcemulater.c?
Best Regards, Hugo Ferreira
Nicolas Kruse: Hi Hugo,
go for a 13.56 MHz crystal. The CPU clock must be dividable by the 847500 Hz subcarrier with no or small error. This remaining error has to be corrected in software (a custom waitForOneBitTime function). For 15 MHz this error is way to high.