william jenkins / Mbed 2 deprecated websocketexample

Using a websocket to control a ShiftBrite LED and a digital compass

Dependencies:   EthernetInterface HMC6352 WebSocketClient mbed-rtos mbed

main.cpp@0:a670e19e5f6a, 2013-10-17 (annotated)

Committer:
wjenkins7
Date:
Thu Oct 17 20:02:56 2013 +0000
Revision:
0:a670e19e5f6a
web socket example code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wjenkins7 0:a670e19e5f6a 1 #include "mbed.h"
wjenkins7 0:a670e19e5f6a 2 #include "EthernetInterface.h"
wjenkins7 0:a670e19e5f6a 3 #include "Websocket.h"
wjenkins7 0:a670e19e5f6a 4 #include "HMC6352.h"
wjenkins7 0:a670e19e5f6a 5
wjenkins7 0:a670e19e5f6a 6 HMC6352 compass(p9, p10);
wjenkins7 0:a670e19e5f6a 7 Serial pc(USBTX, USBRX);
wjenkins7 0:a670e19e5f6a 8 SPI spi(p11, p12, p13);
wjenkins7 0:a670e19e5f6a 9
wjenkins7 0:a670e19e5f6a 10 DigitalOut latch(p15);
wjenkins7 0:a670e19e5f6a 11 DigitalOut enable(p16);
wjenkins7 0:a670e19e5f6a 12
wjenkins7 0:a670e19e5f6a 13 //Function controlling the brightness of shiftbright leds
wjenkins7 0:a670e19e5f6a 14 void RGB_LED(int redx, int greenx, int bluex)
wjenkins7 0:a670e19e5f6a 15 {
wjenkins7 0:a670e19e5f6a 16 unsigned int low_color=0;
wjenkins7 0:a670e19e5f6a 17 unsigned int high_color=0;
wjenkins7 0:a670e19e5f6a 18 int red, green, blue;
wjenkins7 0:a670e19e5f6a 19 red = ((redx - 48)*25)&0x3FF ; // subtract 48 from input to read ascii code correctly
wjenkins7 0:a670e19e5f6a 20 blue = ((bluex - 48)*25)&0x3FF ; // scale by a factor of 25 so the LED's are brighter
wjenkins7 0:a670e19e5f6a 21 green = ((greenx - 48)*25)&0x3FF ; // and with 0x3FF so the colors are no more than 10 bits
wjenkins7 0:a670e19e5f6a 22 high_color=(blue<<4)|((red&0x3C0)>>6);
wjenkins7 0:a670e19e5f6a 23 low_color=(((red&0x3F)<<10)|(green));
wjenkins7 0:a670e19e5f6a 24 spi.write(high_color);
wjenkins7 0:a670e19e5f6a 25 spi.write(low_color);
wjenkins7 0:a670e19e5f6a 26 latch=1;
wjenkins7 0:a670e19e5f6a 27 enable=1;
wjenkins7 0:a670e19e5f6a 28 latch=0;
wjenkins7 0:a670e19e5f6a 29 enable=0;
wjenkins7 0:a670e19e5f6a 30 wait(.25);
wjenkins7 0:a670e19e5f6a 31 }
wjenkins7 0:a670e19e5f6a 32
wjenkins7 0:a670e19e5f6a 33
wjenkins7 0:a670e19e5f6a 34 int main()
wjenkins7 0:a670e19e5f6a 35 {
wjenkins7 0:a670e19e5f6a 36 // set the frequency and format of the spi connection to shiftbright
wjenkins7 0:a670e19e5f6a 37 spi.format(16,0);
wjenkins7 0:a670e19e5f6a 38 spi.frequency(500000);
wjenkins7 0:a670e19e5f6a 39
wjenkins7 0:a670e19e5f6a 40 char *r, *b, *g;
wjenkins7 0:a670e19e5f6a 41 int enable=0;
wjenkins7 0:a670e19e5f6a 42 char r1=48,b1=48,g1=48; //Declare the colors zero or off in ascii code
wjenkins7 0:a670e19e5f6a 43 char recv[3];
wjenkins7 0:a670e19e5f6a 44
wjenkins7 0:a670e19e5f6a 45 // run shiftbright function with zeros to start with shiftbright off
wjenkins7 0:a670e19e5f6a 46 RGB_LED((int)r1, (int)g1, (int)b1);
wjenkins7 0:a670e19e5f6a 47
wjenkins7 0:a670e19e5f6a 48 EthernetInterface eth;
wjenkins7 0:a670e19e5f6a 49 eth.init(); //Use DHCP
wjenkins7 0:a670e19e5f6a 50 eth.connect();
wjenkins7 0:a670e19e5f6a 51 //printf("IP Address is %s\n\r", eth.getIPAddress());
wjenkins7 0:a670e19e5f6a 52
wjenkins7 0:a670e19e5f6a 53 compass.setOpMode(HMC6352_CONTINUOUS, 1, 20);
wjenkins7 0:a670e19e5f6a 54
wjenkins7 0:a670e19e5f6a 55 Websocket ws("ws://sockets.mbed.org:443/ws/demo/wo"); // set socket connection server address
wjenkins7 0:a670e19e5f6a 56 ws.connect(); // connect socket server
wjenkins7 0:a670e19e5f6a 57 int res = ws.send("MBED Connected"); // send msg confirming connection
wjenkins7 0:a670e19e5f6a 58
wjenkins7 0:a670e19e5f6a 59
wjenkins7 0:a670e19e5f6a 60
wjenkins7 0:a670e19e5f6a 61 while (1) {
wjenkins7 0:a670e19e5f6a 62
wjenkins7 0:a670e19e5f6a 63 // when the socket recieves information store it in recv
wjenkins7 0:a670e19e5f6a 64 if (ws.read(recv)) {
wjenkins7 0:a670e19e5f6a 65
wjenkins7 0:a670e19e5f6a 66 // if first character of the msg recieved is C send compass reading to socket
wjenkins7 0:a670e19e5f6a 67 if(recv[0] == 'C') {
wjenkins7 0:a670e19e5f6a 68 float compass_reading;
wjenkins7 0:a670e19e5f6a 69 char reading[20];
wjenkins7 0:a670e19e5f6a 70 compass_reading = compass.sample() / 10.0;
wjenkins7 0:a670e19e5f6a 71 snprintf(reading, sizeof(reading), "%f", compass_reading);
wjenkins7 0:a670e19e5f6a 72 ws.send(reading);
wjenkins7 0:a670e19e5f6a 73 ws.send("Heading is:");
wjenkins7 0:a670e19e5f6a 74 }
wjenkins7 0:a670e19e5f6a 75
wjenkins7 0:a670e19e5f6a 76 // when r is input the character after a space is put as the brightness of the red LED
wjenkins7 0:a670e19e5f6a 77 if(recv[0] == 'r') {
wjenkins7 0:a670e19e5f6a 78 r= strtok(recv, " ");
wjenkins7 0:a670e19e5f6a 79 r= strtok( NULL," ");
wjenkins7 0:a670e19e5f6a 80 r1 = *r;
wjenkins7 0:a670e19e5f6a 81 }
wjenkins7 0:a670e19e5f6a 82
wjenkins7 0:a670e19e5f6a 83 // when b is input the character after a space is put as the brightness of the blue LED
wjenkins7 0:a670e19e5f6a 84 if(recv[0] == 'b') {
wjenkins7 0:a670e19e5f6a 85 b= strtok(recv, " ");
wjenkins7 0:a670e19e5f6a 86 b= strtok( NULL," ");
wjenkins7 0:a670e19e5f6a 87 b1 = *b;
wjenkins7 0:a670e19e5f6a 88 }
wjenkins7 0:a670e19e5f6a 89
wjenkins7 0:a670e19e5f6a 90 // when g is input the character after a space is put as the brightness of the green LED
wjenkins7 0:a670e19e5f6a 91 if(recv[0] == 'g') {
wjenkins7 0:a670e19e5f6a 92 g= strtok(recv, " ");
wjenkins7 0:a670e19e5f6a 93 g= strtok( NULL," ");
wjenkins7 0:a670e19e5f6a 94 g1 = *g;
wjenkins7 0:a670e19e5f6a 95 }
wjenkins7 0:a670e19e5f6a 96
wjenkins7 0:a670e19e5f6a 97 // when 0 is input the shiftbright turns all LED's off
wjenkins7 0:a670e19e5f6a 98 if(recv[0] == '0') {
wjenkins7 0:a670e19e5f6a 99 g1=48;
wjenkins7 0:a670e19e5f6a 100 r1=48;
wjenkins7 0:a670e19e5f6a 101 b1=48;
wjenkins7 0:a670e19e5f6a 102 }
wjenkins7 0:a670e19e5f6a 103
wjenkins7 0:a670e19e5f6a 104 // call on the LED function everytime an input comes from the socket
wjenkins7 0:a670e19e5f6a 105 RGB_LED((int)r1, (int)g1, (int)b1);
wjenkins7 0:a670e19e5f6a 106
wjenkins7 0:a670e19e5f6a 107 }
wjenkins7 0:a670e19e5f6a 108 }
wjenkins7 0:a670e19e5f6a 109
wjenkins7 0:a670e19e5f6a 110 }