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stm32-hal

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STMicroelectronics STM32 HAL and Low-Level driver expertise

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Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/embedded-systems/skills/stm32-hal/SKILL.md

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STM32 HAL/LL Skill

Overview

This skill provides expert-level support for STMicroelectronics STM32 microcontrollers, including HAL driver usage, Low-Level (LL) driver optimization, and STM32CubeMX integration.

Capabilities

STM32CubeMX Integration

  • Configuration file interpretation
  • Code generation customization
  • Pin and peripheral assignment
  • Clock tree configuration
  • Middleware integration

HAL Driver Usage

  • HAL initialization and configuration
  • Callback registration and handling
  • DMA integration with HAL
  • Interrupt mode operations
  • Polling mode operations
  • HAL timeout handling

Low-Level (LL) Drivers

  • LL driver optimization
  • Direct register access patterns
  • HAL to LL migration
  • Mixed HAL/LL usage
  • Performance-critical implementations

Clock Configuration

  • Clock tree setup and optimization
  • PLL configuration
  • Peripheral clock gating
  • Clock source selection
  • HSE/HSI/LSE/LSI configuration

DMA Configuration

  • DMA stream/channel selection
  • Circular and normal modes
  • Double buffer configuration
  • DMA interrupt handling
  • Memory-to-memory transfers

Peripheral Configuration

  • GPIO configuration and modes
  • Timer configuration (PWM, input capture)
  • ADC/DAC setup and calibration
  • Communication peripherals (UART, SPI, I2C)
  • USB device/host configuration

Power Management

  • Sleep and stop mode entry
  • Standby mode configuration
  • Low-power run mode
  • Wake-up source configuration
  • Voltage scaling

Target Processes

  • bsp-development.js - STM32 BSP implementation
  • device-driver-development.js - STM32 driver development
  • dma-optimization.js - DMA configuration and tuning
  • low-power-design.js - STM32 power optimization
  • hardware-bring-up.js - STM32 board bring-up

Dependencies

  • STM32CubeMX
  • STM32 HAL/LL libraries
  • STM32CubeIDE (optional)
  • Device-specific firmware package

Usage Context

This skill is invoked when tasks require:

  • STM32 peripheral configuration
  • HAL/LL driver implementation
  • Clock tree optimization
  • DMA setup and tuning
  • Power mode configuration

Family Support

  • STM32F0, F1, F2, F3, F4, F7
  • STM32G0, G4
  • STM32H5, H7
  • STM32L0, L1, L4, L4+, L5
  • STM32U5
  • STM32WB, WL

Example Configurations

UART with DMA

huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
HAL_UART_Init(&huart1);
HAL_UART_Receive_DMA(&huart1, rx_buffer, RX_SIZE);

LL GPIO Toggle

LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_5);
LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_5);
LL_GPIO_TogglePin(GPIOA, LL_GPIO_PIN_5);