Port - Code example
[PORT - Procedure for parallel port usage]

 void setup()
 {
   PortConfig(PP_F, 15, P_OUT);
 }

 // With FAST_CODE_1 the frequency PF15 is approx 9.211 MHz @ core frequency 400MHz
 // if remove the attribute the result frequency is 1.354 MHz
 FAST_CODE_1 void loop()
 {
   PPF_TGL = BIT(15);
 }

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