STM32H743ZI2‐Nucleo Board - dbsandis/MyUTProject GitHub Wiki
📌 STM32H743ZI Pin Mappings & Development Board Recommendation
Since STM32H743ZI is the best fit for your data logger, let’s map out its key peripherals and recommend the best development board to start prototyping.
1️⃣ Development Board Recommendation
The best dev board for your project is the STM32H743ZI-Nucleo:
This product is
Obsolete . We recommend you that replacement part:
✅ Why Choose NUCLEO-H743ZI2?
✔ Powered by STM32H743ZI (480MHz, Cortex-M7)
✔ Onboard ST-LINK/V2-1 Debugger (no external programmer needed)
✔ Breakout headers compatible with Arduino & ST morpho connectors
✔ Multiple SPI, UART, and I2C for ADC & Raspberry Pi 5 CM integration
✔ USB-C Power Input & Low-Power Sleep Mode Support
📌 Buy it here → NUCLEO-H743ZI2 on ST
2️⃣ STM32H743ZI Pin Mappings for Data Logger
📌 Key Peripheral Assignments
| Peripheral | Function | STM32H743ZI Pin | Notes |
|---|---|---|---|
| SPI1 (ADC Communication) | LTC2387-16 ADC (High-Speed SPI) | PA5 (SCK), PA6 (MISO), PA7 (MOSI), PA4 (CS) | SPI1 → 16-bit DMA Transfer |
| UART3 (Pi 5 CM Communication) | Data logging & AI commands | PB10 (TX), PB11 (RX) | 115200 baud recommended |
| TFT Display SPI | User interface | SPI2 - PB13 (SCK), PB14 (MISO), PB15 (MOSI), PB12 (CS) | 3.5”-5” TFT Screen |
| GPIO Interrupts | Ultrasonic Pulser Trigger | PC10 (Trigger Input) | Pulses transducer |
| ADC Input (Reference Signal) | Capturing ultrasonic echoes | PA0 (ADC1_IN0) | Optional reference voltage |
| I2C1 (RTC for Timestamps) | DS3231 RTC | PB8 (SCL), PB9 (SDA) | Keeps accurate timestamps |
| PWM (Pulser Control) | Ultrasonic waveform generation | TIM1_CH1 - PA8 | Generates precise pulses |
| Power Management | Low-power mode control | PB2 (PWR Control) | Controls power-saving modes |
📌 STM32H743ZI Peripheral Block Diagram for Data Logger
[BATTERY (Li-Ion 3.7V, 2500mAh)]
↓
[Power Management Circuit (Boost Converter, LDO)]
↓
[STM32H743ZI (NUCLEO-H743ZI2)]
├── [SPI1] → [LTC2387-16 ADC] (Ultrasonic Signal Capture)
├── [UART3] → [Raspberry Pi 5 CM] (Data Logging)
├── [SPI2] → [TFT Display] (User Interface)
├── [GPIO] → [Pulser Trigger] (Ultrasonic Control)
├── [I2C1] → [DS3231 RTC] (Timestamping)
├── [PWM] → [TC6320 Pulser] (Waveform Control)
↓
[Cloud Data Storage via Pi 5 CM]
3️⃣ Power Management for STM32H743ZI
Since this is a battery-powered system, optimizing power consumption is crucial.
📌 STM32H743ZI Power Optimization Techniques
✔ Use Low-Power Modes → Enable STOP2 mode when idle (HAL_PWR_EnterSTOPMode())
✔ Reduce Clock Speed → Set SysClock to 200MHz instead of 480MHz
✔ Use DMA for ADC Logging → Reduces CPU load during SPI transfers
✔ Disable Unused Peripherals → Turn off I2C, SPI, or GPIOs when not needed
4️⃣ Example Code: STM32H743ZI SPI Configuration for ADC (LTC2387-16)
#include "stm32h7xx_hal.h"
SPI_HandleTypeDef hspi1;
// SPI1 Configuration for LTC2387-16
void SPI1_Init(void) {
__HAL_RCC_SPI1_CLK_ENABLE();
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
HAL_SPI_Init(&hspi1);
}
5️⃣ Next Steps
1️⃣ Buy the STM32H743ZI2-Nucleo Board
2️⃣ Test SPI Communication with ADC (LTC2387-16)
3️⃣ Develop Battery-Powered Low-Power Modes
4️⃣ Integrate Raspberry Pi 5 CM for AI & Cloud Logging
💡 Would you like a full PCB schematic with STM32H743ZI & ADC integration? 🚀