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Schematic
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pretty simple schem, should note that passthroughs have dedicated ground, separate from board ground, so if you want to probe the passthrough’s ground, use the test points.
Connectors
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Connectors are labelled with silkscreen to indicate what they’re used for
TELEM_PT1 & TELEM_PT2
telemetry passthrough connectors
connect this board between two devices by connecting TELEM_PT1 & TELEM_PT2 to different boards using a 1:1 6pin JST-GH harness
CAN/I2C_PT1 & CAN/I2C_PT2
CAN/I2C passthrough connectors
connect this board between two devices by connecting CAN/I2C_PT1 & CAN/I2C_PT2 to different boards using a 1:1 4pin JST-GH harness
DEBUG
DEBUG connector, connects to a board’s 6pin JST-GH debug connector with a 1:1 harness, following WARG’s standard STM32 Programming Connector Standard
STLINK_V2
Connects to an STLINK_V2 with header cables
Connect the DEBUG connector to the board you’re debugging, then plug the header cables for the STLINK into the connector with a 1:1 pairing
Pins are not labelled, but pin 1 (top right) is NRST, follow the pinout on the STLINK accordingly
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STLINK_V3 mini
Connects to an STLINK_V3 mini with the given cable
Connect the DEBUG connector to the board you’re debugging, then connect the STLINK cable to the STLINK_V3 mini
Use the key on the board’s connector to determine connector direction
Optional Features
I2C pullup resistors
if you are using the CAN/I2C_PT1 & CAN/I2C_PT2 connectors for I2C, solder on 10k resistors onto the R1 & R2 pads
NRST button
press this button to reset the MCU to default state (i think that’s what NRST does)
CAN termination
this is a latching switch, pressing it will terminate the CAN line by connecting it to a 120ohm resistor