working, need to fix input bouncing
Dependencies: mbed
main.cpp@3:3e18de5a9cce, 2015-02-22 (annotated)
- Committer:
- psahay
- Date:
- Sun Feb 22 20:31:08 2015 +0000
- Revision:
- 3:3e18de5a9cce
- Parent:
- 2:54ae225e6203
minor changes
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jaredwil | 0:b44cdf7cb6a5 | 1 | #include "mbed.h" |
jaredwil | 0:b44cdf7cb6a5 | 2 | #include <map> |
jaredwil | 0:b44cdf7cb6a5 | 3 | |
jaredwil | 0:b44cdf7cb6a5 | 4 | //Initialize serial comms |
jaredwil | 0:b44cdf7cb6a5 | 5 | Serial pc(USBTX, USBRX); |
jaredwil | 0:b44cdf7cb6a5 | 6 | |
jaredwil | 2:54ae225e6203 | 7 | //Initialize PMW |
jaredwil | 0:b44cdf7cb6a5 | 8 | PwmOut PWM1(p21); |
jaredwil | 0:b44cdf7cb6a5 | 9 | |
jaredwil | 2:54ae225e6203 | 10 | |
jaredwil | 2:54ae225e6203 | 11 | //Initialize Keypad I/O |
jaredwil | 2:54ae225e6203 | 12 | DigitalOut row1(p26); |
jaredwil | 2:54ae225e6203 | 13 | DigitalOut row2(p23); |
jaredwil | 2:54ae225e6203 | 14 | DigitalOut row3(p24); |
jaredwil | 2:54ae225e6203 | 15 | DigitalOut row4(p25); |
jaredwil | 0:b44cdf7cb6a5 | 16 | |
jaredwil | 0:b44cdf7cb6a5 | 17 | DigitalIn col1(p20); |
jaredwil | 0:b44cdf7cb6a5 | 18 | DigitalIn col2(p19); |
jaredwil | 0:b44cdf7cb6a5 | 19 | DigitalIn col3(p18); |
jaredwil | 0:b44cdf7cb6a5 | 20 | DigitalIn col4(p17); |
jaredwil | 0:b44cdf7cb6a5 | 21 | Timer t1; |
jaredwil | 0:b44cdf7cb6a5 | 22 | |
jaredwil | 2:54ae225e6203 | 23 | //map used for keypad |
jaredwil | 0:b44cdf7cb6a5 | 24 | map<int, char> keypadMap; |
jaredwil | 0:b44cdf7cb6a5 | 25 | |
jaredwil | 2:54ae225e6203 | 26 | |
jaredwil | 2:54ae225e6203 | 27 | //Map for keypad |
jaredwil | 2:54ae225e6203 | 28 | //First 4 bits corrospond to active column |
jaredwil | 2:54ae225e6203 | 29 | //Last 4 bits corrospond to active row |
jaredwil | 0:b44cdf7cb6a5 | 30 | void init(){ |
jaredwil | 0:b44cdf7cb6a5 | 31 | keypadMap[0x11]='1'; |
jaredwil | 0:b44cdf7cb6a5 | 32 | keypadMap[0x12]='2'; |
jaredwil | 0:b44cdf7cb6a5 | 33 | keypadMap[0x14]='3'; |
jaredwil | 0:b44cdf7cb6a5 | 34 | keypadMap[0x18]='A'; |
jaredwil | 0:b44cdf7cb6a5 | 35 | keypadMap[0x21]='4'; |
jaredwil | 0:b44cdf7cb6a5 | 36 | keypadMap[0x22]='5'; |
jaredwil | 0:b44cdf7cb6a5 | 37 | keypadMap[0x24]='6'; |
jaredwil | 0:b44cdf7cb6a5 | 38 | keypadMap[0x28]='B'; |
jaredwil | 0:b44cdf7cb6a5 | 39 | keypadMap[0x41]='7'; |
jaredwil | 0:b44cdf7cb6a5 | 40 | keypadMap[0x42]='8'; |
jaredwil | 0:b44cdf7cb6a5 | 41 | keypadMap[0x44]='9'; |
jaredwil | 0:b44cdf7cb6a5 | 42 | keypadMap[0x48]='C'; |
jaredwil | 0:b44cdf7cb6a5 | 43 | keypadMap[0x81]='*'; |
jaredwil | 0:b44cdf7cb6a5 | 44 | keypadMap[0x82]='0'; |
jaredwil | 0:b44cdf7cb6a5 | 45 | keypadMap[0x84]='#'; |
jaredwil | 0:b44cdf7cb6a5 | 46 | keypadMap[0x88]='D'; |
jaredwil | 0:b44cdf7cb6a5 | 47 | } |
jaredwil | 0:b44cdf7cb6a5 | 48 | |
jaredwil | 0:b44cdf7cb6a5 | 49 | int main() { |
jaredwil | 0:b44cdf7cb6a5 | 50 | init(); |
jaredwil | 0:b44cdf7cb6a5 | 51 | //Initialize rows to 0 |
jaredwil | 0:b44cdf7cb6a5 | 52 | row1 = 0; |
jaredwil | 0:b44cdf7cb6a5 | 53 | row2 = 0; |
jaredwil | 0:b44cdf7cb6a5 | 54 | row3 = 0; |
jaredwil | 0:b44cdf7cb6a5 | 55 | row4 = 0; |
jaredwil | 0:b44cdf7cb6a5 | 56 | t1.start(); |
jaredwil | 0:b44cdf7cb6a5 | 57 | int input = 0x00; |
jaredwil | 0:b44cdf7cb6a5 | 58 | while(1) { |
jaredwil | 1:ab859ed60719 | 59 | //make all rows 0 to add stability |
jaredwil | 1:ab859ed60719 | 60 | row1 = 0; |
jaredwil | 1:ab859ed60719 | 61 | row2 = 0; |
jaredwil | 1:ab859ed60719 | 62 | row3 = 0; |
jaredwil | 1:ab859ed60719 | 63 | row4 = 0; |
jaredwil | 0:b44cdf7cb6a5 | 64 | //Keep each led lit for 4ms |
jaredwil | 0:b44cdf7cb6a5 | 65 | switch(t1.read_ms()%4){ |
psahay | 3:3e18de5a9cce | 66 | case 0: row1 = 1; |
psahay | 3:3e18de5a9cce | 67 | input |= 0x10; |
psahay | 3:3e18de5a9cce | 68 | break; |
psahay | 3:3e18de5a9cce | 69 | case 1: row2 = 1; |
psahay | 3:3e18de5a9cce | 70 | input |= 0x20; |
psahay | 3:3e18de5a9cce | 71 | break; |
psahay | 3:3e18de5a9cce | 72 | case 2: row3 = 1; |
psahay | 3:3e18de5a9cce | 73 | input |= 0x40; |
psahay | 3:3e18de5a9cce | 74 | break; |
psahay | 3:3e18de5a9cce | 75 | case 3: row4 = 1; |
psahay | 3:3e18de5a9cce | 76 | input |= 0x80; |
psahay | 3:3e18de5a9cce | 77 | break; } |
jaredwil | 2:54ae225e6203 | 78 | //Pull the value from each column and check to see if 1 |
jaredwil | 2:54ae225e6203 | 79 | if(col1 == 1) |
psahay | 3:3e18de5a9cce | 80 | input |= 0x01; |
jaredwil | 2:54ae225e6203 | 81 | else if(col2 == 1) |
psahay | 3:3e18de5a9cce | 82 | input |= 0x02; |
jaredwil | 2:54ae225e6203 | 83 | else if(col3 == 1) |
psahay | 3:3e18de5a9cce | 84 | input |= 0x04; |
jaredwil | 2:54ae225e6203 | 85 | else if(col4 == 1) |
psahay | 3:3e18de5a9cce | 86 | input |= 0x08; |
jaredwil | 2:54ae225e6203 | 87 | |
jaredwil | 2:54ae225e6203 | 88 | char c = keypadMap[input]; //assign charcter based on input |
jaredwil | 2:54ae225e6203 | 89 | //Print to the terminal the character if available |
jaredwil | 2:54ae225e6203 | 90 | if(c != 0){ |
psahay | 3:3e18de5a9cce | 91 | pc.printf("%c\r",c); //print input and char |
jaredwil | 2:54ae225e6203 | 92 | } |
jaredwil | 2:54ae225e6203 | 93 | //reset input |
jaredwil | 2:54ae225e6203 | 94 | input = 0x00; |
jaredwil | 0:b44cdf7cb6a5 | 95 | } |
jaredwil | 0:b44cdf7cb6a5 | 96 | } |