| Philip Howard | fa09d18 | 2013-04-01 21:11:00 +0000 | [diff] [blame] | 1 | # Turns on each pin of an mcp23017 on address 0x20 ( quick2wire IO expander ) |
| Phil Howard | 6577b7e | 2016-03-09 12:19:22 +0000 | [diff] [blame] | 2 | import wiringpi |
| Philip Howard | fa09d18 | 2013-04-01 21:11:00 +0000 | [diff] [blame] | 3 | |
| 4 | PIN_BACKLIGHT = 67 # LED |
| 5 | PIN_SCLK = 68 # Clock SCLK |
| 6 | PIN_SDIN = 69 # DN(MOSI) |
| 7 | PIN_DC = 70 # D/C |
| 8 | PIN_RESET = 71 # RST Reset |
| 9 | PIN_SCE = 72 # SCE |
| 10 | |
| 11 | #PIN_BACKLIGHT = 5 |
| 12 | #PIN_SCLK = 4 |
| 13 | #PIN_SDIN = 3 |
| 14 | #PIN_DC = 2 |
| 15 | #PIN_RESET = 1 |
| 16 | #PIN_SCE = 0 |
| 17 | |
| 18 | OUTPUT = 1 |
| 19 | INPUT = 0 |
| 20 | HIGH = 1 |
| 21 | LOW = 0 |
| 22 | |
| 23 | LCD_C = 0 |
| 24 | LCD_D = 1 |
| 25 | |
| 26 | LCD_X = 84 |
| 27 | LCD_Y = 48 |
| 28 | LCD_SEGS = 504 |
| 29 | |
| 30 | MSBFIRST = 1 |
| 31 | LSBFIRST = 0 |
| 32 | |
| 33 | SLOW_DOWN = 400 |
| 34 | |
| 35 | pin_base = 65 |
| 36 | i2c_addr = 0x21 |
| 37 | |
| 38 | wiringpi.wiringPiSetup() |
| 39 | wiringpi.mcp23017Setup(pin_base,i2c_addr) |
| 40 | |
| 41 | def slow_shift_out(data_pin, clock_pin, data): |
| 42 | for bit in bin(data).replace('0b','').rjust(8,'0'): |
| 43 | wiringpi.digitalWrite(clock_pin,LOW) |
| 44 | wiringpi.delay(SLOW_DOWN) |
| 45 | wiringpi.digitalWrite(data_pin,int(bit)) |
| 46 | wiringpi.delay(SLOW_DOWN) |
| 47 | wiringpi.digitalWrite(clock_pin,HIGH) |
| 48 | wiringpi.delay(SLOW_DOWN) |
| 49 | |
| 50 | def lcd_write(dc, data): |
| 51 | wiringpi.digitalWrite(PIN_DC, dc) |
| 52 | wiringpi.digitalWrite(PIN_SCE, LOW) |
| 53 | wiringpi.delay(SLOW_DOWN) |
| 54 | #wiringpi.shiftOut(PIN_SDIN, PIN_SCLK, MSBFIRST, data) |
| 55 | slow_shift_out(PIN_SDIN, PIN_SCLK, data) |
| 56 | wiringpi.digitalWrite(PIN_SCE, HIGH) |
| 57 | wiringpi.delay(SLOW_DOWN) |
| 58 | #wiringpi.delay(2) |
| 59 | |
| 60 | def lcd_initialise(): |
| 61 | wiringpi.pinMode(PIN_BACKLIGHT,OUTPUT) |
| 62 | wiringpi.digitalWrite(PIN_BACKLIGHT, HIGH) |
| 63 | wiringpi.pinMode(PIN_SCE, OUTPUT) |
| 64 | wiringpi.pinMode(PIN_RESET, OUTPUT) |
| 65 | wiringpi.pinMode(PIN_DC, OUTPUT) |
| 66 | wiringpi.pinMode(PIN_SDIN, OUTPUT) |
| 67 | wiringpi.pinMode(PIN_SCLK, OUTPUT) |
| 68 | wiringpi.digitalWrite(PIN_RESET, LOW) |
| 69 | wiringpi.delay(SLOW_DOWN) |
| 70 | wiringpi.digitalWrite(PIN_RESET, HIGH) |
| 71 | wiringpi.delay(SLOW_DOWN) |
| 72 | lcd_write(LCD_C, 0x21 ) # LCD Extended Commands. |
| 73 | lcd_write(LCD_C, 0xCC ) # Set LCD Vop (Contrast). |
| 74 | lcd_write(LCD_C, 0x04 ) # Set Temp coefficent. //0x04 |
| 75 | lcd_write(LCD_C, 0x14 ) # LCD bias mode 1:48. //0x13 |
| 76 | lcd_write(LCD_C, 0x0C ) # LCD in normal mode. |
| 77 | lcd_write(LCD_C, 0x20 ) |
| 78 | lcd_write(LCD_C, 0x0C ) |
| 79 | |
| 80 | def lcd_clear(): |
| 81 | for time in range(0, LCD_SEGS): |
| 82 | lcd_write(LCD_D, 0x00) |
| 83 | |
| 84 | def lcd_fill(): |
| 85 | for time in range(0, LCD_SEGS): |
| 86 | lcd_write(LCD_D, 0xFF) |
| 87 | |
| 88 | |
| 89 | lcd_initialise() |
| 90 | |
| 91 | for time in range(0,4): |
| 92 | lcd_clear() |
| 93 | wiringpi.delay(1000) |
| 94 | lcd_fill() |
| Phil Howard | 6577b7e | 2016-03-09 12:19:22 +0000 | [diff] [blame] | 95 | wiringpi.delay(1000) |