my implementation of mbed-like classes using the LPC1768 register access.

Dependents:   registers-example RedWireBridge

This is just to satisfy my curiosity on how the mbed libraries work. I put it here just in case others are too. Every time I learn how another internal register works, I'll keep it here to save myself from future coding headaches.

working

  • DigitalIn
  • DigitalOut
  • wait()

mostly working

  • Serial
  • Timer
  • Ticker
  • Timeout

Serial doesn't have all the methods that mbed had, but it works for me. (only UART0, so only over USB to the pc for now) Timer has the same limitations of mbed for default resolution (30 min limit), and if you start at the end of resolution and stop after it rolls back to 0, it doesn't take that into account. But I added the option to change resolution, so I can have longer timers.

For Ticker, I used a 100 microsecond timer instead of a 1 microsecond Timer, so the smallest interval in between function calls is 100 microseconds. (10KHz) However, this means that the maximum interval in between function calls is 59 hours. (untested)

The Timeout class, simply uses a Ticker, but then marks it as nonactive after the first function call. Automatically calls the detach() function when attaching it again, so no don't need to worry about it.

Committer:
elevatorguy
Date:
Thu Jan 03 05:25:18 2013 +0000
Revision:
2:276fb0fe230c
Parent:
0:d2d9baa1a6d8
fix

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elevatorguy 0:d2d9baa1a6d8 1 #ifndef __DIGITALOUT_H_
elevatorguy 0:d2d9baa1a6d8 2 #define __DIGITALOUT_H_
elevatorguy 0:d2d9baa1a6d8 3
elevatorguy 0:d2d9baa1a6d8 4 #include "LPC17xx.h"
elevatorguy 0:d2d9baa1a6d8 5 #include "InOut.h"
elevatorguy 0:d2d9baa1a6d8 6
elevatorguy 0:d2d9baa1a6d8 7 class DigitalOut : public InOut
elevatorguy 0:d2d9baa1a6d8 8 {
elevatorguy 0:d2d9baa1a6d8 9 public:
elevatorguy 0:d2d9baa1a6d8 10 DigitalOut(char); //mbed pin number
elevatorguy 0:d2d9baa1a6d8 11 DigitalOut(char, char); // port and bit
elevatorguy 0:d2d9baa1a6d8 12
elevatorguy 0:d2d9baa1a6d8 13 //needs its own, since it doesn't automatically call the superclass' overloaded operators
elevatorguy 0:d2d9baa1a6d8 14 DigitalOut& operator=(bool); //write
elevatorguy 0:d2d9baa1a6d8 15 operator bool(); //read
elevatorguy 0:d2d9baa1a6d8 16 };
elevatorguy 0:d2d9baa1a6d8 17
elevatorguy 0:d2d9baa1a6d8 18 #endif