HAL_DSI_Init() stuck on error

Ricko · ‎2025-03-08

Hi,

the application gets stuck on the Error_Handler() in the piece of code below in main.c

  hdsi.Instance = DSI;
  hdsi.Init.AutomaticClockLaneControl = DSI_AUTO_CLK_LANE_CTRL_DISABLE;
  hdsi.Init.TXEscapeCkdiv = 4;
  hdsi.Init.NumberOfLanes = DSI_TWO_DATA_LANES;
  hdsi.Init.PHYFrequencyRange = DSI_DPHY_FRANGE_80MHZ_100MHZ;
  hdsi.Init.PHYLowPowerOffset = PHY_LP_OFFSSET_0_CLKP;
  PLLInit.PLLNDIV = 32;
  PLLInit.PLLIDF = DSI_PLL_IN_DIV1;
  PLLInit.PLLODF = DSI_PLL_OUT_DIV2;
  PLLInit.PLLVCORange = DSI_DPHY_VCO_FRANGE_500MHZ_800MHZ;
  PLLInit.PLLChargePump = DSI_PLL_CHARGE_PUMP_2000HZ_4400HZ;
  PLLInit.PLLTuning = DSI_PLL_LOOP_FILTER_2000HZ_4400HZ;
  if (HAL_DSI_Init(&hdsi, &PLLInit) != HAL_OK)
  {
    Error_Handler();
  }

I just noticed that DSI lane clock is set to 32MHz - screenshot below - from the HSE (8MHz crystal) which seems too low. To what frequency (in the clock diagram page) do I set the two DSI clocks (DSI TXCLKESC and DSI lane byte clock)? How is that calculated?

Attached is the .IOC file with the current DSI settings if it helps.

Thank you :)

Rick