Steven Kay / SerialComms

UART Driver to receive asynchronous Serial Comms from a Raspberry Pi and parse the results.

SerialComms.cpp@2:cb74b330b285, 2016-02-15 (annotated)

Committer:
sk398
Date:
Mon Feb 15 20:09:32 2016 +0000
Revision:
2:cb74b330b285
Parent:
1:bf3fb80028d8
Child:
3:b608ee5b9b5d
basic data check added on the wasted identifiers

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sk398 0:8ac1280934b4 1 #include "mbed.h"
sk398 0:8ac1280934b4 2 #include "SerialComms.h"
sk398 0:8ac1280934b4 3
sk398 1:bf3fb80028d8 4 SerialComms::SerialComms(PinName tx,PinName rx)
sk398 0:8ac1280934b4 5 {
sk398 1:bf3fb80028d8 6 _HLC_Conn = new Serial(tx,rx);
sk398 0:8ac1280934b4 7 _HLC_Conn-> baud(SERIAL_BAUD_RATE);
sk398 0:8ac1280934b4 8 _HLC_Conn -> format(8,SerialBase::None,1);
sk398 0:8ac1280934b4 9
sk398 2:cb74b330b285 10 _HLC_Conn -> attach(this,&SerialComms::incomingDataISR,Serial::RxIrq);
sk398 0:8ac1280934b4 11
sk398 2:cb74b330b285 12 incomingDataUpdate = FALSE;
sk398 0:8ac1280934b4 13 }
sk398 0:8ac1280934b4 14
sk398 0:8ac1280934b4 15
sk398 2:cb74b330b285 16 void SerialComms::incomingDataISR()
sk398 0:8ac1280934b4 17 {
sk398 0:8ac1280934b4 18 int a = 0;
sk398 2:cb74b330b285 19 dataCheck = 0;
sk398 0:8ac1280934b4 20 for(uint8_t charCount=0; charCount<(2*NUM_BYTES_RECEIVING); charCount++)
sk398 0:8ac1280934b4 21 {
sk398 0:8ac1280934b4 22 if((charCount%2) == 1)
sk398 0:8ac1280934b4 23 {
sk398 0:8ac1280934b4 24 receiverBuffer[a] = _HLC_Conn -> getc();
sk398 0:8ac1280934b4 25 a++;
sk398 0:8ac1280934b4 26 }
sk398 0:8ac1280934b4 27 else
sk398 0:8ac1280934b4 28 {
sk398 2:cb74b330b285 29 dataCheck += _HLC_Conn -> getc();
sk398 0:8ac1280934b4 30 }
sk398 0:8ac1280934b4 31 }
sk398 2:cb74b330b285 32 incomingDataUpdate = TRUE;
sk398 0:8ac1280934b4 33
sk398 0:8ac1280934b4 34 // for(int c = 0; c < 4; c++)
sk398 0:8ac1280934b4 35 // {
sk398 0:8ac1280934b4 36 // printf("recieved: %d\r\n",receiverBuffer[c]);
sk398 0:8ac1280934b4 37 // }
sk398 0:8ac1280934b4 38 }
sk398 0:8ac1280934b4 39
sk398 0:8ac1280934b4 40 int *SerialComms::returnMotorSpeeds()
sk398 0:8ac1280934b4 41 {
sk398 2:cb74b330b285 42 if(SerialComms::incomingDataUpdate == TRUE && dataCheck == 10)
sk398 0:8ac1280934b4 43 {
sk398 2:cb74b330b285 44 SerialComms::incomingDataUpdate = FALSE;
sk398 0:8ac1280934b4 45 return receiverBuffer;
sk398 0:8ac1280934b4 46 }
sk398 0:8ac1280934b4 47 else
sk398 0:8ac1280934b4 48 {
sk398 0:8ac1280934b4 49 int noNewData = -1;
sk398 0:8ac1280934b4 50 int *noNewDataPtr = &noNewData;
sk398 0:8ac1280934b4 51 return noNewDataPtr;
sk398 0:8ac1280934b4 52 }
sk398 0:8ac1280934b4 53 }