Ben Gordon
/
ELEC351_GroupA-branch1
Troubleshooting
LCD.cpp@4:bb7a78619678, 2018-11-04 (annotated)
- Committer:
- BenRJG
- Date:
- Sun Nov 04 20:56:08 2018 +0000
- Revision:
- 4:bb7a78619678
- Parent:
- 1:1f9ea120f8a9
- Child:
- 7:0213c3702c99
Reversed order of BusOut assignments (fixed)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
BenRJG | 0:f8fe58d43763 | 1 | #include "LCD.hpp" |
BenRJG | 0:f8fe58d43763 | 2 | |
BenRJG | 0:f8fe58d43763 | 3 | void LCD::INIT() |
BenRJG | 0:f8fe58d43763 | 4 | { |
BenRJG | 0:f8fe58d43763 | 5 | //All lines default low |
BenRJG | 0:f8fe58d43763 | 6 | _LCD_RS = 0; |
BenRJG | 0:f8fe58d43763 | 7 | _LCD_E = 0; |
BenRJG | 0:f8fe58d43763 | 8 | |
BenRJG | 0:f8fe58d43763 | 9 | //LCD Initialise |
BenRJG | 0:f8fe58d43763 | 10 | wait_ms(45); //Wait for LCD startup |
BenRJG | 4:bb7a78619678 | 11 | wait_us(3000); //Wait whilst LCD busy |
BenRJG | 4:bb7a78619678 | 12 | _LCD_RS = control; |
BenRJG | 4:bb7a78619678 | 13 | LCD_DDRAM = 0; //Clear data line |
BenRJG | 4:bb7a78619678 | 14 | LCD_DDRAM = DDRAM>>4; //Put data on line |
BenRJG | 4:bb7a78619678 | 15 | LCD_strobe(); |
BenRJG | 4:bb7a78619678 | 16 | |
BenRJG | 4:bb7a78619678 | 17 | |
BenRJG | 4:bb7a78619678 | 18 | /*Step 1*/ //cmdLCD(DDRAM|0x08); |
BenRJG | 0:f8fe58d43763 | 19 | /*Step 2*/ cmdLCD(DDRAM|lines2); //Function Set 0x20|0x08 = 0x28 |
BenRJG | 0:f8fe58d43763 | 20 | /*Step 3*/ cmdLCD(DDRAM|lines2); //Function Set 0x20|0x08 = 0x28 |
BenRJG | 0:f8fe58d43763 | 21 | /*Step 4*/ cmdLCD(DISPLAY|on); //Display Control 0x08|0x0x04 = 0x0c |
BenRJG | 0:f8fe58d43763 | 22 | /*Step 5*/ cmdLCD(CLEAR); //Clear Display 0x01 |
BenRJG | 0:f8fe58d43763 | 23 | /*Step 6*/ cmdLCD(ENTRYMODE|I); //Set entry mode 0x04|0x02 = 0x06 |
BenRJG | 0:f8fe58d43763 | 24 | |
BenRJG | 1:1f9ea120f8a9 | 25 | cmdLCD(0x20); //return home location |
BenRJG | 0:f8fe58d43763 | 26 | } |
BenRJG | 0:f8fe58d43763 | 27 | |
BenRJG | 0:f8fe58d43763 | 28 | void LCD::clear() |
BenRJG | 0:f8fe58d43763 | 29 | { |
BenRJG | 0:f8fe58d43763 | 30 | cmdLCD(CLEAR); |
BenRJG | 0:f8fe58d43763 | 31 | } |
BenRJG | 0:f8fe58d43763 | 32 | |
BenRJG | 0:f8fe58d43763 | 33 | void LCD::display(char* str, int line, int position) |
BenRJG | 0:f8fe58d43763 | 34 | { |
BenRJG | 0:f8fe58d43763 | 35 | unsigned int length = strlen(str); |
BenRJG | 0:f8fe58d43763 | 36 | unsigned int line1 = length; |
BenRJG | 0:f8fe58d43763 | 37 | unsigned int line2 = 0; |
BenRJG | 0:f8fe58d43763 | 38 | |
BenRJG | 0:f8fe58d43763 | 39 | //if((line != NULL)&&(position != NULL)) |
BenRJG | 0:f8fe58d43763 | 40 | //{ |
BenRJG | 0:f8fe58d43763 | 41 | cmdLCD(line|position); |
BenRJG | 0:f8fe58d43763 | 42 | //} |
BenRJG | 0:f8fe58d43763 | 43 | unsigned int p; |
BenRJG | 0:f8fe58d43763 | 44 | if(line == LINE1) |
BenRJG | 0:f8fe58d43763 | 45 | { |
BenRJG | 0:f8fe58d43763 | 46 | if(position + length > 16) |
BenRJG | 0:f8fe58d43763 | 47 | { |
BenRJG | 0:f8fe58d43763 | 48 | line1 = findSpace(str); |
BenRJG | 0:f8fe58d43763 | 49 | line2 = length - line1; |
BenRJG | 0:f8fe58d43763 | 50 | } |
BenRJG | 0:f8fe58d43763 | 51 | |
BenRJG | 0:f8fe58d43763 | 52 | for(p=0; p<line1; p++) |
BenRJG | 0:f8fe58d43763 | 53 | { |
BenRJG | 0:f8fe58d43763 | 54 | putt(str[p]); |
BenRJG | 0:f8fe58d43763 | 55 | } |
BenRJG | 0:f8fe58d43763 | 56 | |
BenRJG | 0:f8fe58d43763 | 57 | cmdLCD(LINE2); |
BenRJG | 0:f8fe58d43763 | 58 | } |
BenRJG | 0:f8fe58d43763 | 59 | |
BenRJG | 0:f8fe58d43763 | 60 | if(line == LINE2){line2 = length;} |
BenRJG | 0:f8fe58d43763 | 61 | |
BenRJG | 0:f8fe58d43763 | 62 | if((line2 <= 16)&&(line != 2)) |
BenRJG | 0:f8fe58d43763 | 63 | { |
BenRJG | 0:f8fe58d43763 | 64 | for(p=0; p<line2; p++) |
BenRJG | 0:f8fe58d43763 | 65 | { |
BenRJG | 0:f8fe58d43763 | 66 | putt(str[line1 + p]); |
BenRJG | 0:f8fe58d43763 | 67 | } |
BenRJG | 0:f8fe58d43763 | 68 | } |
BenRJG | 0:f8fe58d43763 | 69 | else |
BenRJG | 0:f8fe58d43763 | 70 | { |
BenRJG | 0:f8fe58d43763 | 71 | for(p=0; p<(13); p++) |
BenRJG | 0:f8fe58d43763 | 72 | { |
BenRJG | 0:f8fe58d43763 | 73 | putt(str[line1 + p]); |
BenRJG | 0:f8fe58d43763 | 74 | } |
BenRJG | 0:f8fe58d43763 | 75 | |
BenRJG | 0:f8fe58d43763 | 76 | for(p=0; p<3; p++) |
BenRJG | 0:f8fe58d43763 | 77 | { |
BenRJG | 0:f8fe58d43763 | 78 | putt('.'); |
BenRJG | 0:f8fe58d43763 | 79 | } |
BenRJG | 0:f8fe58d43763 | 80 | } |
BenRJG | 0:f8fe58d43763 | 81 | } |
BenRJG | 0:f8fe58d43763 | 82 | |
BenRJG | 0:f8fe58d43763 | 83 | void LCD::putt(char c) |
BenRJG | 0:f8fe58d43763 | 84 | { |
BenRJG | 4:bb7a78619678 | 85 | wait_us(3000); |
BenRJG | 0:f8fe58d43763 | 86 | _LCD_RS = text; |
BenRJG | 0:f8fe58d43763 | 87 | set_LCD_data(c); |
BenRJG | 0:f8fe58d43763 | 88 | } |
BenRJG | 0:f8fe58d43763 | 89 | |
BenRJG | 0:f8fe58d43763 | 90 | void LCD::cmdLCD(unsigned char cmd) |
BenRJG | 0:f8fe58d43763 | 91 | { |
BenRJG | 4:bb7a78619678 | 92 | wait_us(3000); //Wait whilst LCD busy |
BenRJG | 0:f8fe58d43763 | 93 | _LCD_RS = control; |
BenRJG | 0:f8fe58d43763 | 94 | set_LCD_data(cmd); //set data on bus |
BenRJG | 0:f8fe58d43763 | 95 | } |
BenRJG | 0:f8fe58d43763 | 96 | |
BenRJG | 0:f8fe58d43763 | 97 | void LCD::LCD_strobe(void) |
BenRJG | 0:f8fe58d43763 | 98 | { |
BenRJG | 0:f8fe58d43763 | 99 | wait_us(10); |
BenRJG | 0:f8fe58d43763 | 100 | _LCD_E = 1; |
BenRJG | 0:f8fe58d43763 | 101 | wait_us(10); |
BenRJG | 0:f8fe58d43763 | 102 | _LCD_E = 0; |
BenRJG | 0:f8fe58d43763 | 103 | } |
BenRJG | 0:f8fe58d43763 | 104 | |
BenRJG | 0:f8fe58d43763 | 105 | void LCD::set_LCD_data(unsigned char d) |
BenRJG | 0:f8fe58d43763 | 106 | { |
BenRJG | 0:f8fe58d43763 | 107 | // Send upper 4 bits then lower for bits |
BenRJG | 0:f8fe58d43763 | 108 | // e.g. 11110000 => 1111 -> 0000 |
BenRJG | 0:f8fe58d43763 | 109 | |
BenRJG | 0:f8fe58d43763 | 110 | LCD_DDRAM = 0; //Clear data line |
BenRJG | 0:f8fe58d43763 | 111 | LCD_DDRAM = d>>4; //Put data on line |
BenRJG | 0:f8fe58d43763 | 112 | LCD_strobe(); |
BenRJG | 4:bb7a78619678 | 113 | wait_us(1000); |
BenRJG | 0:f8fe58d43763 | 114 | LCD_DDRAM = 0; //Clear |
BenRJG | 0:f8fe58d43763 | 115 | LCD_DDRAM = d; //Put remaining data on line |
BenRJG | 0:f8fe58d43763 | 116 | LCD_strobe(); |
BenRJG | 0:f8fe58d43763 | 117 | } |
BenRJG | 0:f8fe58d43763 | 118 | |
BenRJG | 0:f8fe58d43763 | 119 | unsigned int LCD::findSpace(char* str) |
BenRJG | 0:f8fe58d43763 | 120 | { |
BenRJG | 0:f8fe58d43763 | 121 | unsigned int space = 0; |
BenRJG | 0:f8fe58d43763 | 122 | int n = 16; |
BenRJG | 0:f8fe58d43763 | 123 | while(!space & (n != -1)) |
BenRJG | 0:f8fe58d43763 | 124 | { |
BenRJG | 0:f8fe58d43763 | 125 | n--; |
BenRJG | 0:f8fe58d43763 | 126 | switch(str[n]) |
BenRJG | 0:f8fe58d43763 | 127 | { |
BenRJG | 0:f8fe58d43763 | 128 | case ' ': |
BenRJG | 0:f8fe58d43763 | 129 | case '.': |
BenRJG | 0:f8fe58d43763 | 130 | case ',': |
BenRJG | 0:f8fe58d43763 | 131 | case ':': |
BenRJG | 0:f8fe58d43763 | 132 | case ';': |
BenRJG | 0:f8fe58d43763 | 133 | case '-': |
BenRJG | 0:f8fe58d43763 | 134 | case '/': |
BenRJG | 0:f8fe58d43763 | 135 | space = 1; |
BenRJG | 0:f8fe58d43763 | 136 | break; |
BenRJG | 0:f8fe58d43763 | 137 | } |
BenRJG | 0:f8fe58d43763 | 138 | } |
BenRJG | 0:f8fe58d43763 | 139 | if(n == -1){ return 16; } |
BenRJG | 0:f8fe58d43763 | 140 | else{ return n+1; } |
BenRJG | 0:f8fe58d43763 | 141 | } |