96Boards STM32 Sensor Mezzanine¶
96Boards STM32 Sensor Mezzanine is based on the ST Microelectronics STM32F446VE Cortex M4 CPU.
This board acts as a mezzanine platform for all 96Boards CE compliant boards. It can also be used as a standalone board.
96Boards STM32 Sensor Mezzanine provides the following hardware components:
- STM32F446VE in LQFP100 package
- ARM® 32-bit Cortex®-M4 CPU with FPU
- 180 MHz max CPU frequency
- 1.8V work voltage
- 512 KB Flash
- 128 KB SRAM
- On board sensors:
- Temperature/Pressure: STMicro LPS22HB
- Acclerometer/Gyroscope: STMicro LSM6DS3H
- Magnetometer: STMicro LIS3MDL
- Microphone: STMicro MP34DT01
- 3User LEDs
- GPIO with external interrupt capability
- I2C (2)
- SPI (2)
- I2S (1)
The Zephyr 96b_stm32_sensor_mez board configuration supports the following hardware features:
|NVIC||on-chip||nested vector interrupt controller|
The default board configuration can be found in the defconfig file:
96Boards STM32 Sensor Mezzanine can be driven by an internal oscillator as well as the main PLL clock. In default board configuration, the 16MHz external oscillator is used to drive the main PLL clock to generate a System Clock (SYSCLK) at 84MHz. On the bus side, AHB/APB2 clocks runs at 84MHz, while APB1 clock runs at 42MHz.
On 96Boards STM32 Sensor Mezzanine, Zephyr console output is assigned to UART4 exposed via on-board Micro USB connector. Default settings are 115200 8N1.
96Boards STM32 Sensor Mezzanine board has up to 3 I2Cs. The default I2C mapping is:
- I2C1_SCL : PB6
- I2C1_SDA : PB7
- I2C2_SCL : PB10
- I2C2_SDA : PC12
I2C2 goes to the Groove connectors and can be used to attach external sensors.
96Boards STM32 Sensor Mezzanine board has 2 SPIs. SPI1 is used in slave mode as the communication bus with the AP. SPI2 is used in master mode to control the LSM6DS3H sensor. The default SPI mapping is:
- SPI1_NSS : PA4
- SPI1_SCK : PA5
- SPI1_MISO : PA6
- SPI1_MOSI : PA7
- SPI2_NSS : PB9
- SPI2_SCK : PD3
- SPI2_MISO : PB14
- SPI2_MOSI : PB15
96Boards STM32 Sensor Mezzanine board exposes 6 PWM channels on the Arduino connector. The default PWM mapping is:
- PWM3_CH1 : PB4 : D9
- PWM3_CH3 : PC8 : D3
- PWM4_CH3 : PD14 : D6
- PWM4_CH4 : PD15 : D5
- PWM9_CH1 : PE5 : D12
- PWM9_CH2 : PE6 : D11
96Boards STM32 Sensor Mezzanine board exposes 1 I2S port which is connected to the on-board ST MP34DT01 DMIC. The default I2S mapping is:
- I2S2_SD : PC1
- I2S2_CK : PC7
Programming and Debugging¶
Here is an example for building the Hello World application.
# From the root of the zephyr repository west build -b 96b_stm32_sensor_mez samples/hello_world
96Boards STM32 Sensor Mezzanine board includes an ST-LINK/V2-1 embedded debug tool interface. This interface is supported by the openocd version included in the Zephyr SDK.
Flashing an application to 96Boards STM32 Sensor Mezzanine¶
Here is an example for the Hello World application.
Run a serial host program to connect with your 96Boards STM32 Sensor Mezzanine board.
$ minicom -b 115200 -D /dev/ttyACM0
Build and flash the application:
# From the root of the zephyr repository west build -b 96b_stm32_sensor_mez samples/hello_world west flash
You should see the following message on the console:
$ Hello World! 96b_stm32_sensor_mez