Devo 7E Hardware Connections
The following documents the hardware inside the Devo-7e transmitter
STM32 Connections
| Pin | Desription |
| BOOT0 | CON2 |
| NRST | Debugger (NRESET) |
GPIOA
| Pin | Desription |
| 1 | Piezo speaker |
| 2 | output to 0 to shut off Tx |
| 3 | power-switch in 'off' position (goes high on 'off') |
| 5 (SPI1_SCK) | SPI Flash, LCD |
| 6 (SPI1_MISO) | SPI Flash, LCD |
| 7 (SPI1_MOSI) | SPI Flash, LCD |
| 9 (USART1_TX) | Trainer Rx? |
| 10 (USART1_RX) | Trainer Tx? |
| 11 (USBDM) | USB+ |
| 12 (USBDP) | USB- |
| 13 (SWDIO) | Debugger SWDIO (TMS) |
| 14 (SWCLK) | Debugger SWCLK (TCK) |
GPIOB
| Pin | Desription |
| 0 | LCD Chip Enable |
| 1 | LCD Backlight |
| 2 (BOOT1) | SPI Flash Chip-Enable |
| 5 | Button Matrix Col 1 |
| 6 | Button Matrix Col 2 |
| 7 | Button Matrix Col 3 |
| 8 | Button Matrix Col 4 |
| 10 | USB Enable (enable Low) |
| 11 | TxModule pin 10 - CYRF6936 Reset |
| 12 (SPI2_NSS) | TxModule pin 1 |
| 13 (SPI2_SCK) | TxModule pin 2 |
| 14 (SPI2_MISO) | TxModule pin 4 |
| 15 (SPI2_MOSI) | TxModule pin 3 |
GPIOC
| Pin | Desription |
| 0 (ADC_IN_10) | Right Vertical Stick |
| 1 (ADC_IN_11) | Left Vertical Stick |
| 2 (ADC_IN_12) | Left Horizontal stick |
| 3 (ADC_IN_13) | Right Horizontal Stick |
| 4 (ADC_IN_14) | Battery Voltage |
| 5 | LCD Data/Command mode |
| 6 | Button Matrix Row 1 |
| 7 | Button Matrix Row 2 |
| 8 | Button Matrix Row 3 |
| 9 | Button Matrix Row 4 |
| 10 | FMode Switch |
| 11 | Hold Switch |
GPIOD
| Pin | Desription |
| 2 | Haptic vibration motor |
The battery voltage (ADC1_14) is calculated by the formula:
V = 0.0021x + 0.3026
| | B.5 | B.6 | B.7 | B.8 |
| C.6 | Aileron TR | NC | Throttle TU | NC |
| C.7 | Aileron TL | Ent | Throttle TD | DN- |
| C.8 | Elevator TU | R+ | Rudder TL | UP+ |
| C.9 | Elevator TD | L- | Rudder TR | Ext |
TL: Trim Left
TR: Trim Right
TU: Trim Up
TD: Trim down
FCC Report