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hardware:devof4
Table of Contents
Devo F4 Hardware Connections
The following documents the hardware inside the Devo-F4 transmitter
- MCU: STM32F103RBT6 128kB Flash, 20kB RAM 64pin package
- SPI Flash: PCT25VF512A 64kB SPI NOR Flash
- Video Overlay: IA9211
- Radio: CYRF6936 2.4GHz
STM32 Connections
NOTE: These are from the Devo-7e. they may need to be updated! '*' Indiciates updated values
| Pin | Desription |
|---|---|
| BOOT0 | CON2 |
| NRST | Debugger (NRESET) |
GPIOA
| Pin | Desription |
|---|---|
| *0 | 5.8GHz Receiver channel0 pin |
| 1 | Piezo speaker |
| 2 | output to 0 to shut off Tx |
| 3 | power-switch in 'off' position (goes high on 'off') |
| *4 | 5.8GHz signal strength |
| 5 (SPI1_SCK) | SPI Flash, LCD |
| 6 (SPI1_MISO) | SPI Flash, LCD |
| 7 (SPI1_MOSI) | SPI Flash, LCD |
| *8 | 5.8GHz Receiver channel1 pin |
| 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) |
| *15 | 5.8GHz Receiver channel2 pin |
GPIOB
| Pin | Desription |
|---|---|
| 0 | LCD Chip Enable |
| 1 | LCD Backlight |
| 2 (BOOT1) | SPI Flash Chip-Enable |
| *3 | Mix0 Switch |
| *4 | Mix2 Switch |
| 5 | Button Matrix Col 1 |
| 6 | Button Matrix Col 2 |
| 7 | Button Matrix Col 3 |
| 8 | Button Matrix Col 4 |
| 9 | 5.8GHz Receiver on/off |
| 10 | USB Enable (enable Low) |
| 11 | TxModule pin 10 - CYRF6936 Reset |
| 12 (SPI2_NSS?) | TxModule pin 1 |
| 13 (SPI2_SCK?) | TxModule pin 3 |
| 14 (SPI2_MISO?) | TxModule pin 9 |
| 15 (SPI2_MOSI?) | TxModule pin 7 |
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 | FMode2 Switch |
| 11 | FMode0 Switch |
| *12 | Hold Switch |
| 13 | AIL DR Switch |
| 14 | Gear Swicth |
| *15 | TRN Switch |
GPIOD
| Pin | Desription |
|---|---|
| 2 | Haptic vibration motor |
The battery voltage (ADC1_14) is calculated by the formula:
V = 0.0021x + 0.3026
Button Matrix
| B.5 | B.6 | B.7 | B.8 | |
|---|---|---|---|---|
| C.6 | L- | DN- | Aileron TL | Throttle TD |
| C.7 | R+ | UP+ | Aileron TR | Elevator TD |
| C.8 | Ent | Ext | Rudder TL | Throttle TU |
| C.9 | NC | NC | Rudder TR | Elevator TU |
TL: Trim Left TR: Trim Right TU: Trim Up TD: Trim down
FCC Report
FCCID: S29 DEVO-F4
Schematic available here courtesy of user Buoncristiani: schemadevof4v2.pdf
Switch MOD for DEVO F4
see this post
hardware/devof4.txt (122183 views) · Last modified: 2017/04/14 11:25 by SirDomsen
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