The MiniUART driver for the rasberri Pi. Only tested with the model 3B and partly with a 3B+
Filename is in de format YYYYMMDD

• Source code of 23 September 2018 this has the prototype of the interrupt for receiving data 20180925
• Source code of 28 September 2018 this has the improved prototype of the interrupt routine. Also global variables are removed as much as possible 20180928
• Worked on receive interrupt and on the device driver entries. 20181004
• Worked on device driver entries. 20181006
• Hmm Problem with the interrupt routine only 9 chars are received while I send 30. 20181025
• Still problem with interrupt. Try to make code more efficient. 20190323
• Data is send now correctly. Only no handshake is implemented
  20190526 ( Source )
  Module
• Data was ( big chunks ) send not correctly showed closer examanition, it looks that
  this has been rectified now.
  Things left :
  testing ;-)
  Use of the MiniUART HAL in the ISR
  Modem control
  20190601