How to make external OctoSPI loader for STM32H7?

[Freedom_Neo]

I am using below componnet tools

MCU: STM32H7B3IIT6

IDE: STM32CubeIDE Version: 1.8.0

GUI: TouchGFX Version: 4.18.1

SDRAM: IS45S16800F-7CTLA1-TR

FLASH: MX25LM51245GMI00 (OctoSPI)

I am using below pins

// STM32H7B3IIT6 PIN CHART
// MX25LM51245GMI00
 
// OCTOSPIM P1
// D0   PD11:AF9   
// D1   PD12:AF9    
// D2   PE2:AF9    
// D3   PD13:AF9
// D4   PC1:AF10   
// D5   PC2:AF11   
// D6   PC3:AF11   
// D7   PD7:AF10
// CLK  PB2:AF9
// NCLK NOT USED
// NCS  PB10:AF9  
// DQS  PC5:AF10

I am using below configuration

There is source for QSPI but dont have OctoSPI.

I created external loader for custom board. But it didnt work. I am getting below errror.

I shared external loader project file at attachment. Can you review it please? I need your support.

https://drive.google.com/file/d/1m1aCF1FueA2xE2qVvX7kWM_29_l7sNRr/view?usp=sharing

[PDixo.1]

Thanks for your work on this.

So far I haven't been able to get anything sensible from the memory but I am still working on it.