Steven Kay / SerialComms

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

SerialComms.cpp@4:85353bd571f2, 2016-02-20 (annotated)

Committer:
sk398
Date:
Sat Feb 20 13:26:51 2016 +0000
Revision:
4:85353bd571f2
Parent:
3:b608ee5b9b5d
Child:
5:d497795761a5
Child:
6:74b5ac7719f4
Asynch receiving works. No methods added for transmission of sensor data. Parser of data needs added into receiver to breakdown pointer.

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 3:b608ee5b9b5d 6 _HLC_Conn = new RawSerial(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 3:b608ee5b9b5d 10 _HLC_Conn -> attach(this,&SerialComms::incomingDataISR,RawSerial::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
sk398 4:85353bd571f2 35 int *SerialComms::returnCommData()
sk398 0:8ac1280934b4 36 {
sk398 4:85353bd571f2 37 if(SerialComms::incomingDataUpdate == TRUE && dataCheck == 15)
sk398 0:8ac1280934b4 38 {
sk398 2:cb74b330b285 39 SerialComms::incomingDataUpdate = FALSE;
sk398 0:8ac1280934b4 40 return receiverBuffer;
sk398 0:8ac1280934b4 41 }
sk398 0:8ac1280934b4 42 else
sk398 0:8ac1280934b4 43 {
sk398 0:8ac1280934b4 44 int noNewData = -1;
sk398 0:8ac1280934b4 45 int *noNewDataPtr = &noNewData;
sk398 0:8ac1280934b4 46 return noNewDataPtr;
sk398 0:8ac1280934b4 47 }
sk398 0:8ac1280934b4 48 }