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Dependencies:   mbed

main.cpp@4:dfb672184380, 2014-04-14 (annotated)

Committer:
silverpanda
Date:
Mon Apr 14 00:45:29 2014 +0000
Revision:
4:dfb672184380
Parent:
3:7188bd978801
Child:
5:03b7c237c4c4
added comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
silverpanda 0:6898e364f29a 1 // Print "Hello World" to the PC
silverpanda 0:6898e364f29a 2
silverpanda 0:6898e364f29a 3 #include "mbed.h"
silverpanda 0:6898e364f29a 4
silverpanda 0:6898e364f29a 5 Serial usbSerial(USBTX, USBRX);
silverpanda 1:20033a89af0e 6 Ticker messageTicker, scanTicker;
silverpanda 3:7188bd978801 7 bool scanUSBSerialRxFlag;
silverpanda 0:6898e364f29a 8
silverpanda 0:6898e364f29a 9 void sendText(char *thisText)
silverpanda 0:6898e364f29a 10 {
silverpanda 4:dfb672184380 11 // this can send any text
silverpanda 0:6898e364f29a 12 usbSerial.printf(thisText);
silverpanda 0:6898e364f29a 13 }
silverpanda 0:6898e364f29a 14 //-----------------------------------------------------------------------------
silverpanda 0:6898e364f29a 15
silverpanda 1:20033a89af0e 16 void sendHelloWorld()
silverpanda 0:6898e364f29a 17 {
silverpanda 4:dfb672184380 18 // sends the first greeting
silverpanda 3:7188bd978801 19 sendText("** Hello World **\n\n> ");
silverpanda 1:20033a89af0e 20 }
silverpanda 1:20033a89af0e 21 //-----------------------------------------------------------------------------
silverpanda 1:20033a89af0e 22
silverpanda 1:20033a89af0e 23 void scanUSBSerialRx()
silverpanda 1:20033a89af0e 24 {
silverpanda 4:dfb672184380 25 // check if there is something to read
silverpanda 1:20033a89af0e 26 if(usbSerial.readable()) {
silverpanda 4:dfb672184380 27
silverpanda 4:dfb672184380 28 // if so ...
silverpanda 1:20033a89af0e 29 char character = usbSerial.getc();
silverpanda 4:dfb672184380 30
silverpanda 4:dfb672184380 31 // see if this is a semi colon or a carriage return
silverpanda 4:dfb672184380 32 // if so, give a new line cursor
silverpanda 4:dfb672184380 33 if((character == ';') || (charac ter == 13)) usbSerial.printf("\n> ");
silverpanda 4:dfb672184380 34
silverpanda 4:dfb672184380 35 // if not, just print the character
silverpanda 2:53d8e47c5171 36 else usbSerial.printf("%c", character);
silverpanda 1:20033a89af0e 37 }
silverpanda 4:dfb672184380 38
silverpanda 4:dfb672184380 39 // reset the flag
silverpanda 1:20033a89af0e 40 scanUSBSerialRxFlag = false;
silverpanda 1:20033a89af0e 41 }
silverpanda 1:20033a89af0e 42 //-----------------------------------------------------------------------------
silverpanda 1:20033a89af0e 43
silverpanda 1:20033a89af0e 44 void setScanUSBSerialRxFlag()
silverpanda 1:20033a89af0e 45 {
silverpanda 1:20033a89af0e 46 scanUSBSerialRxFlag = true;
silverpanda 1:20033a89af0e 47 }
silverpanda 1:20033a89af0e 48 //-----------------------------------------------------------------------------
silverpanda 1:20033a89af0e 49
silverpanda 1:20033a89af0e 50 void initMain()
silverpanda 1:20033a89af0e 51 {
silverpanda 4:dfb672184380 52 // increase the baud rate for the USB serial port
silverpanda 1:20033a89af0e 53 usbSerial.baud(115200);
silverpanda 1:20033a89af0e 54
silverpanda 4:dfb672184380 55 // send greeting with first cursor
silverpanda 2:53d8e47c5171 56 sendHelloWorld();
silverpanda 1:20033a89af0e 57
silverpanda 4:dfb672184380 58 // start polling for characters
silverpanda 1:20033a89af0e 59 scanTicker.attach(&setScanUSBSerialRxFlag, 0.01);
silverpanda 1:20033a89af0e 60 scanUSBSerialRxFlag = false;
silverpanda 0:6898e364f29a 61 }
silverpanda 0:6898e364f29a 62 //-----------------------------------------------------------------------------
silverpanda 0:6898e364f29a 63
silverpanda 0:6898e364f29a 64 int main() {
silverpanda 1:20033a89af0e 65 initMain();
silverpanda 1:20033a89af0e 66
silverpanda 4:dfb672184380 67 while(true) {
silverpanda 4:dfb672184380 68
silverpanda 4:dfb672184380 69 // check the flag
silverpanda 1:20033a89af0e 70 if(scanUSBSerialRxFlag) scanUSBSerialRx();
silverpanda 4:dfb672184380 71
silverpanda 4:dfb672184380 72 // give the main loop some time
silverpanda 1:20033a89af0e 73 wait(0.02);
silverpanda 0:6898e364f29a 74 }
silverpanda 0:6898e364f29a 75 }
silverpanda 0:6898e364f29a 76 //-----------------------------------------------------------------------------