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README-STM32.md

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MagAlpha-Code-Samples on STM32F303RE MCU

Supported sensors

Supports all 3rd generation MagAlpha magnetic angle sensors from Monolithic Power Systems.

Applications Part Numbers
Turning knob applications (potentiometer replacement) MA800, MA820, MA850
Rotary encoders (optical encoder replacement, Servo motors, ...) MA702, MA704, MA710, MA730, MA732
Position controlled motor drivers (FOC, ...) MA302, MA310, MA330
Motor commutation (hall switches replacement) MA102
Automotive application MAQ430, MAQ470

SPI

Pins

  • PA5/D13: SPI1_SCK
  • PA6/D12: SPI1_MISO
  • PA7/D11: SPI1_MOSI

Mode

  • Mode: Full-Duplex Master
  • Hardware NSS Signal: Disable

Configuration

  • Frame Format: Motorola
  • Data Size: 8 bits
  • First Bit: MSB First
  • Prescaler (for Baud Rate): 128
  • Baud Rate: 562.5 kBits/s
  • Clock Polarity (CPOL): High
  • Clock Phase (CPHA): 2 Edge
  • CRC Calculation: Disabled
  • NSS Signal Type: Software

Clock Configuration

  • SYSCLK is set at 72MHz
  • Use 8MHz High Speed Internal (HSI) clock

GPIO

  • PB6/D10:
  • User Label: SPI1_CS
  • GPIO output level: High
  • GPIO mode: Output Push Pull
  • GPIO Pull-up/Pull-down: No pull up pull down
  • Maximum output speed: Low

UART Configuration

USB to UART Serial Cable

We use the FTDI C232HD-DDHSP-0 3.3V USB to UART Serial Cable 3.3V to connect the MCU UART RX and TX signal to the PC through USB.

  • FTDI Cable TXD (orange) <=> CN3.TX
  • FTDI Cable RXD (yellow) <=> CN3.RX
  • FTDI Cable GND (black) <=> CN12

Pins

  • PA2: USART_TX, CN3.TX, FTDI Cable TXD (orange cable)
  • PA3: USART_RX, CN3.RX, FTDI Cable RXD (yellow cable)

Mode

  • Mode: Asynchronous
  • Hardware Flow Control (RS232): Disable
  • Hardware Flow Control (RS485): Unchecked

Configuration

  • Baud Rate: 38400 Bits/s
  • Word Length: 8 Bits (including Parity)
  • Parity: None
  • Stop Bits: 1
  • Data Direction: Receive and Transmit
  • Over Sampling: 16 Samples
  • Single Sample: Disable
  • Auto Baudrate: Disable
  • TX Pin Active Level Inversion: Disable
  • RX Pin Active Level Inversion: Disable
  • Data Inversion: Disable
  • TX and RX Pins Swapping: Disable
  • Overrun: Enable
  • DMA on RX Error: Enable
  • MSB First: Disable