Stm32Cube FSMC address pin definiton bug

[totti001]

Posted on March 17, 2014 at 16:18

Hello everybody!

I check the Stm32Cube graphical pin definition. I want to use FSMC bus SRAM1, with 16 bit bus, and 1 address bit. The address pin I want is PE3, but the cube not allowing use this. If i use 1 bit addressing only the PF0 can select for FSMC address pin. This is a bug or what?

Thanks

[Amel NASRI]

Posted on March 18, 2014 at 10:39

Hi Janos,

What part number are you selecting exactly?

-Mayla-

[totti001]

Posted on March 18, 2014 at 10:53

Stm32f407ig controller.

[stm32cube-t]

Posted on March 19, 2014 at 12:19

Hi Janos,

STM32CubeMX does not support this configuration.

However, you can follow the following procedure to obtain the code you want:

[Note: your application will need to manage the offset introduced by using FSMC_A19 instead of FSMC_A0: when using 8 bit data, this means for example considering 0x7FFFF as the base adress and 0x8000 as the second adress.]

Use STM32CubeMX and configure the FSMC for 20 bit address (pinout tab) in order to reserve the PE3 pin:

Configure the Project options from the Project menu to generate peripheral initialization code as peripheral dedicated .c/.h files :

In the inc/src folders you will find the fsmc initialization code.

Modify the function HAL_FSMC_MspInit in the fsmc.c file to configure only the GPIO PE3 (i.e. comment all other GPIO initialization code) as shown in example below [Warning: this modification will be overwritten if regenerating the code with STM32CubeMX. So you should copy the code to a dedicated project folder]: