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===== Devo 7E Hardware Connections =====

The following documents the hardware inside the Devo-7e transmitter

  * MCU: [[http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1031/LN1565/PF164487|STM32F103RBT6]] 128kB Flash, 20kB RAM 64pin package
  * SPI Flash: [[http://www.sst.com/dotAsset/40373.pdf|SST25VF016B]] 2MB SPI NOR Flash
  * LCD Display: [[http://www.tronpok.com/uploads/12864Z.pdf|TG12864Z]] 128x64 SPI B/W. [[http://www.trulydisplays.com/monochrome/specs/Novatek%20NT7538%20Spec.pdf|NT7538]] compatible
  * Radio: [[http://www.cypress.com/?docID=28606|CYRF6936]] 2.4GHz
 

==== 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

=== Button Matrix ===
|     ^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 ====
FCCID: [[https://www.fcc.gov/general/fcc-id-search-page|S29 DEVO-7E]]
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