Introduction - If you have any usage issues, please Google them yourself
// Description: This code re-programs the F2xx DCO calibration constants.
// A software FLL mechanism is used to set the DCO based on an external
// 32kHz reference clock. After each calibration, the values from the
// clock system are read out and stored in a temporary variable. The final
// frequency the DCO is set to is 1MHz, and this frequency is also used
// during Flash programming of the constants. The program end is indicated
// by the blinking LED.
// ACLK = LFXT1/8 = 32768/8, MCLK = SMCLK = target DCO
// //* External watch crystal installed on XIN XOUT is required for ACLK *