Preloading a QSPI with STM32CubeIDE

[RLein.1]

I'm working on a project using an STM32H753XI MCU with a touch display. I am not currently using TouchGFX. I would like to preload images into the onboard QSPI during the project load. How do I go about doing this? I have used TouchGFX designer on other projects and know this is automated while loading the project onto the PCA.

[Pavel A. · Accepted solution]

Either you can use the CubeProgrammer with a suitable "external loader", or make a simple utility to copy the data from your PC using semihosting I/O.

The latter is slow, not good for large amount of data.

A small example below:

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
extern void initialise_monitor_handles(void);
 
 
void load_stuff(void)
{
  printf("Semihosting! read big file from host\n");
  initialise_monitor_handles();
 
  const char * fname =  "C:/TMP/stuff.bin";
  // if NO path: opens relative to openocd.exe (.../STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.openocd.../tools/bin/)
  int fd = open(fname, O_RDONLY|O_BINARY);
  if (fd <= 0) {
	  printf("Error open file!\n");
	  return;
  }
 
  static char buf[4096];
  unsigned offset = 0;
  while (1)
  {
     int rc = read(fd, buf, sizeof(buf));
     if (rc < 0) {
   	     printf("Error read!\n");
    	 break;
     }
     if (rc == 0) {
   	     printf("Read: normal end!\n");
    	 break;
     }
 
    QSPI_FlashWrite(offset , buf, rc);
 
    offset += (unsigned)rc;
  }
  printf("Read total: %u\n", offset );
  close(fd);
}

[Andreas Bolsch]

Depends on whether you use CubeProgrammer or OpenOCD inside CubeIDE.

For the former, everything had been said above. For the latter: Use stmqspi driver which comes with OpenOCD. For a sample setup see the cfg-files for stm32h754i-disco.