message: Reduce SPI slew rate to reduce ringing
diff: @@ -104,7 +104,7 @@ void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
  GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_PULLDOWN; // Idle clock and MOSI low.
  - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  + GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
  GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  