yegorich / testing

Testing

This is intended to provide tools for embedded testing.

Setting up the BPT (bluepill tester)

Tools

• SWD or JTAG flasher
• Soldering iron and solder

Materials

• blue pill

Flashing BPT

1. Solder pins on the blue pill and secure the USB connector of not already done.
2. Download firmware from the QualifiedFirmware folder.
3. Flash using an SWD or JTAG interface. (I usually like using the Nucleo debugger/flasher since it is cheap, has USB to Serial and support drag and drop binary).
4. If custom implementation is desired open source firmware is available in the bluepill_tester folder (though it is setup with STM Workbench and STMCubeMX).

Using the BPT

Tools

• USB to UART converter

Materials

• BPT with qualified firmware
• breadboard
• DUT (device under test)
• Jumper wires

Running Test

(examples will use periph_i2c test)

1. Connect DUT to the testing computer.
2. Connect the BPT to the USB to UART converter.
   (IF_RX of BPT <-> TX of USB to UART)
   (IF_TX of BPT <-> RX of USB to UART)
3. Connect specific pins required for testing the DUT to the BPT
   (DUT_SCL of BPT <-> SCL0 of DUT)
   (DUT_SDA of BPT <-> SDA0 of DUT)
4. Flash DUT with test firmware
5. Run python script in the test folder

BPT Pinout

BPT Misc Info

• I2C slave address is 85 or 0x55
• Total registers are 256
• Upper registers can be read or written (152+)
• Lower registers are read only by user but can be altered with UART2 connection
• sys register is locked
• For changing configuration the registers can be set then the ex command must be used to execute changes