| pin | function |
|---|---|
| PA2 | LCD control /CS |
| PA3 | LCD control /RESET |
| PA4 | LCD control RS |
| PA5 | LCD control /WR |
| PA6 | LCD control /RD |
| PB5 | Button K1 (on/off) |
| PB6 | Button K2 (i) |
| PB7 | Grip-hallsensor analog input |
| PC1 | LCD data DB6 |
| PC2 | LCD data DB5 |
| PC3 | LCD data DB4 |
| PC4 | LCD data DB3 |
| PC5 | LCD data DB2 |
| PC6 | LCD data DB1 |
| PC7 | LCD data DB0 |
| PD2 | LCD backlight control |
| PD3 | LCD backlight control |
| PD5 | UART TX |
| PD6 | UART RX |
| PD7 | Soft power latch |
| PE5 | LCD data DB7 |
- soft power latch
- The supply voltage from the battery is switched via a transistor.
- It is activated while pressing the power button.
- The microcontroller has to set its pin PD7 to HIGH so it stays on when the button is no more pressed
- buck regulator 12V for the needs of the LCD Backlight
- 5V linear regulator for the microcontroller, fed from 12V
-
Type: COG-T177MZHS-11
-
Resolution: 160x128
-
Controller: ST7735S
-
Interface: 8-bit parallel
-
Backlight can be controlled via PD2 and PD3:
- one LOW, one HIGH: normal brightness
- both HIGH: maximum brightness
- Buttons are connected to the pins stated above.
- LOW active
- external pullup resistors
- capacitors for debouncing(?)
- Rotation state of the grip is detected by a hallsensor
- SS49E connected to analog input via a RC filter
