Display "Hello World" on a NHD-7.0-800480FT-CSXV-CTP display using a ESP32 Thing.
This code provides an API to communicate with the FT81X chip from an ESP32 Thing. It simplifies the complexity of SPI on the ESP32 by formatting the SPI communications to work correctly with the FT81X. It also allows for QUAD SPI communications where permitted to increase data transfer speeds.
- Using the VSPI pins of the ESP32 connected to the FT81X display
| COLOR | ESP_SIGNAL | ESP_32_PIN | DISPLAY_PIN | DISPLAY_SIGNAL |
|---|---|---|---|---|
| RED | VCC 3.3v | 3v3 | 1 | 3v3 |
| ORANGE | VDD 3.3-5v | NA | 17 | BL_VDD |
| BLACK | GND | GND | 2 | GND |
| WHITE | CS0 | 5 | 6 | FT_CS |
| PURPLE | SCLK | 18 | 3 | FT_CLK |
| YELLOW | MOSI | 23 | 5 | FT_MOSI/IO0 |
| GREEN | MISO | 19 | 4 | FT_MISO/IO1 |
| GRAY | QUADWP | 22 | 11 | FT_GPIO0/IO2 |
| BLUE | QUADHD | 21 | 12 | FT_GPIO1/IO3 |
- Under menuconfig in Serial flasher config set the Default serial port
foo@bar:~$ make menuconfig- Requires an esp-idf development environment and IDF-PATH environment variable set to the path of your esp-idf folder (e.g., IDF_PATH=/opt/esp/esp-idf or IDF_PATH=~/esp/esp-idf).
- Compile and program the ESP32 Thing
foo@bar:~$ make test; make flash- Power / Noise
- You can power the ESP32 and NHD-7.0 from the ESP32 Thing connected to a USB port
- Insufficient current will result in unpredictable behavior that may cause damage
- Connect BL_VDD to 3v3
- Keep the display PWM low(<20)
- Use proper bypass caps near power connection of the ESP32 Thing
- A REG_PWM_DUTY of 20 uses ~280ma and a PWM of 128 uses ~950ma.
- This is based upon the default REG_PWM_HZ frequency of 250hz.
- Submit issues and contribute improvements on github/nutechsoftware
- Sean Mathews [email protected] - Initial skeleton and R&D