STM32CubeMX Sensor Configuration

This page documents the current STM32CubeMX configuration for the Sensor Board firmware and explains how to extend it for sensor interfaces (UART/I2C/SPI/ADC) in a way that is safe for code generation. 
 IOC File : components/sensor_board/firmware/firmware.ioc Generated HAL Init Files : components/sensor_board/firmware/Core/Src/ Application Entry : src/sensor_board/main.c 
 Current CubeMX Snapshot 
 Item Value MCU STM32H753ZIT6 (NUCLEO-H753ZI) CubeMX Version 6.15.0 STM32Cube FW Package STM32Cube FW_H7 v1.12.1 Toolchain Makefile + GCC Post-generation Script ../../../scripts/post_code_generation.bash 
 Enabled CubeMX Components 
 CORTEX_M7 (I-Cache/D-Cache enabled, MPU configured) ETH (RMII mode) LWIP (Static IP, DHCP disabled) FREERTOS (CMSIS-RTOS v2, default task generated) TIM1 (base timer) SYS/NVIC/RCC base platform configuration 
 Clock and Core Setup 
 Clock Configuration (from IOC) 
 Parameter Value Clock Source HSE 8 MHz -> PLL SYSCLK 72 MHz APB1 36 MHz (DIV2) APB2/APB3/APB4 72 MHz TIM1 Clock 72 MHz 
 Cortex-M7 / MPU 
 Instruction cache: enabled Data cache: enabled MPU region at 0x30000000 , size 32KB , shareable, non-cacheable 
 Pinout and Peripheral Mapping 
 Ethernet (RMII) 
 Signal Pin ETH_REF_CLK PA1 ETH_MDIO PA2 ETH_CRS_DV PA7 ETH_MDC PC1 ETH_RXD0 PC4 ETH_RXD1 PC5 ETH_TX_EN PG11 ETH_TXD0 PG13 ETH_TXD1 PB13 
 Serial / COM 
 Signal Pin Note USART1_TX PA9 Configured in generated MX_GPIO_Init() USART1_RX PA10 Configured in generated MX_GPIO_Init() USART3_TX PD8 Used by NUCLEO COM path ( MX_USART3_Init in app init) USART3_RX PD9 Used by NUCLEO COM path ( MX_USART3_Init in app init) 
 Board IO / Misc 
 Pin Mode Typical Use PC13 GPIO Input User button PB0 GPIO Output Board output line PB7 GPIO Output Board output line PB14 GPIO Output Board output line PH0 / PH1 HSE oscillator System clock source PC14 / PC15 LSE oscillator Low-speed oscillator 
 Timer, RTOS, and Interrupts 
 TIM1 Base Timer 
 htim1.Init.Prescaler = 6400 - 1;
htim1.Init.Period = 10000; 
 With a 72 MHz timer clock, this gives an update period near 0.89 s. 
 Interrupt Priorities (Key Entries) 
 IRQ Priority Notes ETH_IRQn 15 Ethernet/LwIP path TIM1_UP_IRQn 12 TIM1 update interrupt TIM2_IRQn 7 HAL tick time base EXTI15_10_IRQn 6 External interrupt group 
 Sensor Interface Status 
 What Is Already Configured in CubeMX 
 Networking stack and RMII pinout Base timer and RTOS scaffolding Basic UART-capable pins and NUCLEO COM integration path 
 What Is Not Yet Fully Modeled in CubeMX (TO-DO ONCE sensors retrieved and assembled) 
 Dedicated ADC channels for analog sensors (pH, load cell, pressure) Dedicated I2C/SPI buses for IMU and pressure variants Explicit sensor-specific pin labels and alternate-function assignments 
 Important: Current sensor drivers include placeholders for hardware access in multiple modules. When bringing up physical sensors, add the corresponding CubeMX peripherals first, then update the sensor drivers to use generated handles. 
 Recommended Workflow 
 Open components/sensor_board/firmware/firmware.ioc in STM32CubeMX. Add required peripherals for the target sensor like this: 
 GPS -> USARTx (baud/parity/stop bits to match module)
IMU -> I2Cx or SPIx (+ optional DRDY INT GPIO)
pH -> ADCx channel (sampling time, resolution)
Load Cell -> ADCx channel(s) or external ADC interface
Pressure -> ADCx or I2Cx/SPIx (depends on sensor part) 
 Assign and lock pins in Pinout view; avoid overlap with RMII and COM pins. Configure clocks for new peripherals in Clock Configuration. Set NVIC priorities for new ISR sources so Ethernet/RTOS timing remains stable. Generate code with Keep User Code enabled. Rebuild using PlatformIO and validate startup + sensor polling. 
 Conflict To Look Out for Before Saving .ioc file 
 No conflict with ETH RMII pins (PA1, PA2, PA7, PC1, PC4, PC5, PG11, PG13, PB13) No conflict with debug/COM path (PA9/PA10 and PD8/PD9) No conflict with oscillator pins (PH0, PH1, PC14, PC15) 
 Related Pages 
 Configuration Reference Sensor Basics Utility Library