Posted on May 17, 2017 at 17:22Hi,
I have already started implementing my application on an STM32F429-Discovery Board. Today, I received my custom pcb which uses the same SDRAM (ISSI IS42S16400J) with a slightly different configuration/pinout.
Instead of using SDNE1 and SDNCKE1 (PB5/6), I am using SDNE0 and SDNCKE0.
At the very start of the project, I am planning to use the discovery board source files. In order to get everything up and running on my board, I adjusted the pin configuration in the stm32f429i_discovery_sdram.c to use my pinout. Below, the relevant lines of code are shown. (The complete file can be downloaded from st's website)
/*-- GPIOs Configuration -----------------------------------------------------*/
/*
+-------------------+--------------------+--------------------+
| PC3 <-> FMC_SDCKE0|
| PC2 <-> FMC_SDNE0 |
| PC0 <-> FMC_SDNWE |
+-------------------+
*/
/* GPIOC configuration */
GPIO_InitStructure.Pin = GPIO_PIN_0|GPIO_PIN_2|GPIO_PIN_3;
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
However, I get HardFault_Handler errors. I am assuming that something is going wrong in the init process.
My question is: From the datasheet I've been assuming that SDNE and SDCKE are only select signals; meaning that I only have to change the pins, but do not have to touch the address space and other init routines. Am I totally wrong or can anyone guess what I have overlooked?
#stm32-f4 #stm32f4-discovery #stm32 #sdram-fmc
