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Markus Sattler d7a88c3ea3 use a function to calculate best match clock register for SPI
TEST:

Frequency: 1000000  -> [0x009C1001] EQU: 0	 Pre: 39     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 1000000
Frequency: 4000000  -> [0x00001001] EQU: 0	 Pre: 0	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 40000000
Frequency: 2000000  -> [0x00041001] EQU: 0	 Pre: 1	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 20000000
Frequency: 1600000  -> [0x00004002] EQU: 0	 Pre: 0	     N: 4	 H: 0	 L: 2	 - Back Calculated Frequency: 16000000
Frequency: 1610000  -> [0x00004002] EQU: 0	 Pre: 0	     N: 4	 H: 0	 L: 2	 - Back Calculated Frequency: 16000000
Frequency: 1000000  -> [0x000C1001] EQU: 0	 Pre: 3	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 10000000
Frequency: 8000000  -> [0x00101001] EQU: 0	 Pre: 4	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 8000000
Frequency: 5000000  -> [0x001C1001] EQU: 0	 Pre: 7	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 5000000
Frequency: 4000000  -> [0x00241001] EQU: 0	 Pre: 9	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 4000000
Frequency: 2000000  -> [0x004C1001] EQU: 0	 Pre: 19	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 2000000
Frequency: 1000000  -> [0x009C1001] EQU: 0	 Pre: 39	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 1000000
Frequency: 500000   -> [0x013C1001] EQU: 0	 Pre: 79	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 500000
Frequency: 250000   -> [0x027C1001] EQU: 0	 Pre: 159	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 250000
Frequency: 125000   -> [0x04FC1001] EQU: 0	 Pre: 319	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 125000
Frequency: 6666666  -> [0x00141001] EQU: 0	 Pre: 5	 	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 6666666
Frequency: 6000000  -> [0x00181001] EQU: 0	 Pre: 6	 	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 5714285
Frequency: 3000000  -> [0x00202001] EQU: 0	 Pre: 8	 	 N: 2	 H: 0	 L: 1	 - Back Calculated Frequency: 2962962
Frequency: 100	    -> [0x7FFFF020] EQU: 0	 Pre: 8191	 N: 63	 H: 0	 L: 32	 - Back Calculated Frequency: 152
Frequency: 125000   -> [0x04FC1001] EQU: 0	 Pre: 319	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 125000
Frequency: 16457    -> [0x25F81001] EQU: 0	 Pre: 2430	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 16454
2015-05-08 00:48:08 +02:00
..
2015-01-21 04:19:04 +03:00
2015-01-21 04:19:04 +03:00