Jonathan Jones / Mbed 2 deprecated Base Station

RoboCup Base Station

Dependencies:   mbed mbed-rtos Wireless Drivers

main.cpp@1:e5373c63f642, 2014-12-31 (annotated)

Committer:
jjones646
Date:
Wed Dec 31 03:33:35 2014 +0000
Revision:
1:e5373c63f642
Parent:
0:a606cf2249ad
Child:
2:7fd95eae5731
updating with secondary radio status led support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jjones646 0:a606cf2249ad 1 // Cycle through a 7-segment LCD display
jjones646 0:a606cf2249ad 2
jjones646 0:a606cf2249ad 3 #include "mbed.h"
jjones646 0:a606cf2249ad 4
jjones646 0:a606cf2249ad 5 // Outputs used as input values to the 7-segment binary decoder
jjones646 0:a606cf2249ad 6 DigitalOut signal[4] = {p17, p18, p19, p20};
jjones646 0:a606cf2249ad 7
jjones646 0:a606cf2249ad 8 // For latching the 7 segment led's output
jjones646 0:a606cf2249ad 9 DigitalOut latch(p16);
jjones646 0:a606cf2249ad 10
jjones646 0:a606cf2249ad 11 // To show that the mbed is running
jjones646 0:a606cf2249ad 12 DigitalOut status_led(LED1);
jjones646 0:a606cf2249ad 13
jjones646 1:e5373c63f642 14 DigitalOut r2_led[3] = {p24, p25, p26}; // TX, RX, ERR
jjones646 1:e5373c63f642 15
jjones646 0:a606cf2249ad 16 // Function for writing a number to the 7-segment display
jjones646 0:a606cf2249ad 17 void writeSegment(uint8_t val)
jjones646 0:a606cf2249ad 18 {
jjones646 0:a606cf2249ad 19 // write out the new value
jjones646 0:a606cf2249ad 20 for (int i=0; i<4; i++)
jjones646 0:a606cf2249ad 21 signal[i] = ((1<<i) & (val)) & 0x0F;
jjones646 0:a606cf2249ad 22
jjones646 0:a606cf2249ad 23 // latch the value
jjones646 0:a606cf2249ad 24 for (int i=0; i<2; i++)
jjones646 0:a606cf2249ad 25 latch = !latch;
jjones646 0:a606cf2249ad 26 }
jjones646 0:a606cf2249ad 27
jjones646 0:a606cf2249ad 28 int main()
jjones646 0:a606cf2249ad 29 {
jjones646 1:e5373c63f642 30 // turn all LEDs off initially
jjones646 1:e5373c63f642 31 for (int i=0; i<3; i++)
jjones646 1:e5373c63f642 32 r2_led[i] = 1;
jjones646 1:e5373c63f642 33
jjones646 0:a606cf2249ad 34 latch = 0; // initialize the latch pin for the CD4511B decoder
jjones646 0:a606cf2249ad 35 status_led = 0; // initialize & turn off led for startup operations
jjones646 0:a606cf2249ad 36
jjones646 0:a606cf2249ad 37 uint8_t channel; // limit to 4 bits (0x00 to 0x0F)
jjones646 0:a606cf2249ad 38 channel = 8; // light up all of the 7-segment's segments at startup - allows for the user to detect if there's a problem
jjones646 0:a606cf2249ad 39 writeSegment(channel);
jjones646 1:e5373c63f642 40 channel = 0; // start back over at 0
jjones646 1:e5373c63f642 41
jjones646 1:e5373c63f642 42 wait(0.2);
jjones646 0:a606cf2249ad 43
jjones646 1:e5373c63f642 44 // turn on all secondary radio status LEDs
jjones646 1:e5373c63f642 45 for (int i=2; i>=0; i--) {
jjones646 1:e5373c63f642 46 r2_led[i] = 0;
jjones646 1:e5373c63f642 47 wait(0.2);
jjones646 1:e5373c63f642 48 }
jjones646 1:e5373c63f642 49
jjones646 1:e5373c63f642 50 // hold
jjones646 1:e5373c63f642 51 wait(0.3);
jjones646 1:e5373c63f642 52
jjones646 1:e5373c63f642 53 // turn off all secondary radio status LEDs
jjones646 1:e5373c63f642 54 for (int i=0; i<3; i++) {
jjones646 1:e5373c63f642 55 r2_led[i] = 1;
jjones646 1:e5373c63f642 56 wait(0.2);
jjones646 1:e5373c63f642 57 }
jjones646 0:a606cf2249ad 58
jjones646 0:a606cf2249ad 59 while(1) {
jjones646 0:a606cf2249ad 60 // send numerical value to 7-segment & hold for a while
jjones646 0:a606cf2249ad 61 writeSegment(channel++);
jjones646 0:a606cf2249ad 62 wait(0.3);
jjones646 0:a606cf2249ad 63 status_led = !status_led;
jjones646 1:e5373c63f642 64
jjones646 0:a606cf2249ad 65 // wait again just so that the status led and segment are out of sync
jjones646 0:a606cf2249ad 66 wait(0.2);
jjones646 1:e5373c63f642 67
jjones646 0:a606cf2249ad 68 // reset value if too high
jjones646 0:a606cf2249ad 69 channel = channel > 9 ? 0 : channel;
jjones646 0:a606cf2249ad 70 }
jjones646 0:a606cf2249ad 71 }