STM32 ESC AS5048 SPI driver

Erik_Friesen · April 9, 2025, 1:14pm

FWIW I have this working code for DMA SPI on the STM32G431 ESC dev board. If anyone wants to use this as is, go ahead, no support though. If anyone wants to clean this up and fully arduino-fy it go ahead. Test on non arduino, 750khz signal yields about a 4000khz sample rate. The pins are pre defined at this point, using the encoder a,b, and z inputs. Also, due to limited pins, the as5048 MOSI needs to be tied to VDD. Also note that SPI over wires is horrid, also that this lib doesn’t error check anything.

gist.github.com

https://gist.github.com/friesendrywall/b6d7e7af07f7e89eb851784bf3893c5d

MagneticSensorAS5048.cpp


extern "C" { void DMA1_Channel5_IRQHandler(void); }

#include "MagneticSensorAS5048.h"

#include "stm32g4xx_ll_dma.h"
#include "stm32g4xx_ll_bus.h"

#define M1_ENCODER_CS_Pin LL_GPIO_PIN_8
#define M1_ENCODER_CS_GPIO_Port GPIOB

This file has been truncated. show original

MagneticSensorAS5048.h

#ifndef MAGNETICSENSORAS5048_LIB_H
#define MAGNETICSENSORAS5048_LIB_H


#include "Arduino.h"
#include <SPI.h>
#include "../common/base_classes/Sensor.h"
#include "../common/foc_utils.h"
#include "../common/time_utils.h"

This file has been truncated. show original

runger · April 9, 2025, 2:06pm

Thanks very much for sharing! When I find time I’ll try to clean it up and make it general…