Hi.
Originally I made a project controlling a 7" LCD connected to an STM32F103ZGT6. Though suddenly it had stopped working and it is only working once in a while (very unstable).
I have reverted every changes made since it was working, but it still doesn’t work. I have an RLink debugger, and the LCD never finishes the initialization, as it hangs when it tries to write to the FSMC RAM.
So I definitely think it’s a FSMC related problem, but sometimes it works and other times it doesn’t. It worked in the debugger once, but when I then ended the debugging and just reprogrammed the STM32, it didn’t work. Though the “refresh rate” of the LCD is much slower, when it sometimes works, than it was when it worked without any problems!?
Sometimes I also get an error from the RLink, telling me that the processor had stopped responding, and then it quits debugging.
I’ve done some more debugging, and the the STM32 hangs when I try to write to the RAM of the FSMC, where the LCD is connected.
It can initialize the FSMC and GPIO fine, and it can write to the Register (LCD->LCD_REG), but when I try to write to the RAM, it hangs (LCD->LCD_RAM).
This is my definitions of the LCD FSMC port:
typedef struct
{
__IO uint16_t LCD_REG;
__IO uint16_t LCD_RAM;
} LCD_TypeDef;
/* Note: LCD /CS is CE4 - Bank 4 of NOR/SRAM Bank 1~4 */
#define LCD_BASE ((uint32_t)(0x60000000 | 0x0C000000))
#define LCD ((LCD_TypeDef *) LCD_BASE)
I’m using the STM3210E-EVAL board with the STM32F103ZGT6 processor.
The project can be downloaded here: http://www.tkjelectronics.dk/GUI_Application.zip
I’m really looking forward to an answer 
Best Regards
Thomas Jespersen