https://www.carberry.it/wiki/ 2026-05-01T02:21:02+02:00 https://www.carberry.it/wiki/ https://www.carberry.it/wiki/lib/tpl/bootstrap3/images/favicon.ico text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/communication?rev=1569843894&do=diff Communication to the Raspberry Pi via UART The Communication between Carberry microcontroller and Raspberry Pi is made via UART port on the P1 header. Full duplex RXD/TXD lines are used, at 3V3 level. Obviously theese to lines are reserved for communication, and cannot be used for other purposes. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/ctrlpower?rev=1569843894&do=diff Control of the Raspberry Pi power supply by mosfet... Raspberry Pi power supply is provided by a switching regulator on Carberry board. Also, there is a power mosfet that cut this supply, when the system has to be put in low power mode. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/debug_interface?rev=1569843894&do=diff Debug Interface Debug interface exposes on a three pins header, a 3V3 serial interface (RXD/GND/TXD) for debug purpose. On DEBUG_TX pin, you will see a lot of messages that Carberry firmware writes to allow users to understand what is happening. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/gpocout?rev=1569843894&do=diff General purpose open collector outputs Two general purpose open collector outputs are provided, to drive any resistive (and low inductive) load up to 100mA. As theese outputs are software driven by Linux on Raspberry Pi, you can use them to turn on lamps, relays, leds, and so on. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/header?rev=1569843894&do=diff Connection to Raspberry via the P1 26 pin GPIO header located on the board Carberry, fits on Raspberry, and is connected to this one by the 26 pin expansion header. All signals and supplies are routed by this connection. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/infrared_interface?rev=1569843894&do=diff Infrared Interface With Interface Interface, you can connect to Carberry an infrared sensor and/or an infrared emitter, to work with remote controls and appliances. Layout Connector wiring from Carberry side. All signals, except from supply, are routed to Carberry MCU. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/inginput?rev=1569843894&do=diff +12V Ignition signal input Where available in the car, this signal can be used to turn on and off Carberry board and the attached Raspberry Pi. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/ingoutput?rev=1569843894&do=diff +12V Ignition signal output with a 2.5A power mosfet This output power line is drived by Carberry, following (with some timing rules) the status of the ignition of the car. The ignition input can be either detected from CAN Bus, than from ingnition input wire (pin 3 of main connector). text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/main_connector?rev=1569843894&do=diff Main connector Main connector provides power supply to Carberry and to Raspberry Pi. Also are present all signals needed to interface to vehicle. Board Connector Layout Colors refer to standard Carberry harness, available here. Pinout Position text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/microusb_interface?rev=1569843894&do=diff Micro USB Interface Micro USB connector on Carberry acts as USB device role. Actually, CDC profile emulation is implemented, and acts as terminal interface as RPi UART. Future development will allow Carberry to emulate a PC keyboard, Mouse or others HID profile devices. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/picmicro?rev=1569843894&do=diff Microchip PIC32MX microcontroller Microchip PIC32MX795F512L microcontroller is used in Carberry board. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/raspberry_pi_interface?rev=1569843894&do=diff Raspberry Pi Interface - Carberry 3 Raspberry Pi Interface joins toghether Carberry 3 and Raspberry Pi. Are present power supply lines and all signals needed to interface each other. Layout Connector view from Carberry side. All signals, except from supply, are routed to Carberry MCU. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/rpipower?rev=1569843894&do=diff Power supply generated onboard. Raspberry Pi power supply is provided by a switching regulator on Carberry board. Up to more than one ampere at 5 volt, can be drawn from this switching regulator, enough to power a fully loaded Raspebrry Pi. text/html 2019-09-30T13:44:54+02:00 https://www.carberry.it/wiki/carberry/hw_spec/shutdown?rev=1569843894&do=diff Logic shutdown signal to Raspberry Pi... To avoid data corruption on Raspberry Pi SD card, an appropriate shutdown signal is sent by Carberry microcontroller to Raspberry Pi to start shudown sequence, before power supply goes away, when ignition signal turns off.