EVB Setup & Compiling
Requirements
Software
In order to compile the EVB binary, both Arm GNU Toolchain and Segger J-Link must be installed on the host PC. After installing, ensure they are both available from the terminal. (e.g which arm-none-eabi-gcc)
Hardware
The following items are needed to flash firmware and run demos.
- Apollo4 EVB
- MAX86150 Eval Board
- 2x USB-C cables
- Jumper wires -OR- Qwiic cable
Hardware Setup
In order to connect the MAX86150 breakout board to the Apollo 4 EVB, we must first solder the 5-pin header on to the MAX86150 board.
Once soldered, connect the breakout board to the EVB using 5 jumper wires as follows:
| Breakout | Apollo 4 EVB |
|---|---|
| VCC | J17 pin 2 (5V) |
| SCL | J11 pin 3 (GPIO8) |
| SDA | J11 pin 1 (GPIO9) |
| INT | Not used |
| GND | J17 pin 4 (GND) |
Note
Alternatively, the Qwiic connector on the breakout board can be used. This will require a Qwiic breakout cable. For 3V3, J3 pin 5 (3.3V) can be leveraged on the EVB.
Firmware Setup
Connect the EVB to your laptop using both USB-C ports on the EVB.
Note
Quality of ECG from the onboard pads depends on contact quality and will produce more artifacts. For a better quality ECG, it is recommended that the accompanying ECG cable be used with electrodes. Place blue electrode on left wrist/finger/arm and red electrode on right wrist/finger/arm. Optionally, the black ground electrode can be placed on the body to further improve SNR.
Firmware Commands
| Name | Command | Description |
|---|---|---|
| Clean | make -C ./evb clean |
Clean build artifacts |
| Build | make -C ./evb |
Compile binary |
| Flash | make -C ./evb deploy |
Flash binary to EVB |
| View | make -C ./evb view |
View SWO Output |