HardFault_Handler on GUI_Init() when trying to use STEmWin with externalSDRAM on Core4x9 CooCox IDE

[dencher]

Posted on November 06, 2015 at 14:56

Hello, i try to start with extSDRAM with open4x9 board stm32f429IG. im Using a CooCox IDE. While i worked with internal SRAM everything was fine. But whe i try to work with external SDRAM(IS42SI6400) 64Mb, i meet a HardFault_Handler() in GUI_Init(). In debug mode i found that it is appears in emWin_LCD_Init(), that called after LCD_X_Config(). (also CooCox says that function LCD_X_DisplayDriver(unsigned LayerIndex, unsigned Cmd, void * pData) receives(0,0,0x0) but there is no command 0, is it normal?How a can start with external SDRAM?

I use simple code :

[code]GUIConf.c

.....

#if USE_SDRAM_AS_GUIMEM==1

#define GUI_NUMBYTES (1024*110)

#else

#define GUI_NUMBYTES (1024 * 100)

#endif

#if USE_SDRAM_AS_GUIMEM==1

U32 extMem[GUI_NUMBYTES / 4] __attribute__((section(''.HeapMemSection'')));

#else

U32 extMem[GUI_NUMBYTES / 4];

#endif

....

sdram.h

#define SDRAM_BANK_ADDR ((uint32_t)0xD0100000)

lcd.h

#define LCD_FRAME_BUFFER SDRAM_BANK_ADDR 

#define BUFFER_OFFSET ((uint32_t)0xC0000)

main.c

SystemInit();

LowLevel_Init();

/* Init the STemWin GUI Library */

GUI_Init();

LowLevel_Init()

{

GUI_X_Init();

GPIO_InitTypeDef GPIO_InitStructure;

UB_STemWIN_init();

/* Configure GPIO PC1 to set L3GD20 Chip Select to Reset */

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;

GPIO_Init(GPIOC, &GPIO_InitStructure);

/* Deselect : Chip Select high */

GPIO_SetBits(GPIOC, GPIO_Pin_1);

MX_GPIO_Init();

/* Initialize the SDRAM */

SDRAM_Init();

/* LCD initialization */

LCD_Init();

/* LCD Layer initialization */

LCD_LayerInit();

/* Enable the LTDC */

LTDC_Cmd(ENABLE);

LCD_SetLayer(LCD_FOREGROUND_LAYER);

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_CRC, ENABLE);

}

....

system_stm32f4xx.c

#define DATA_IN_ExtSRAM 1

link script 

rom (rx) : ORIGIN = 0x08000000, LENGTH = 0x00200000

ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00030000

ram1 (rwx) : ORIGIN = 0x10000000, LENGTH = 0x00010000

.HeapMemSection : 

{

*(.HeapMemSection)

} > sdram

sdram (rwx) : ORIGIN = 0xD0100000, LENGTH = 0x00400000

[/code]

[Tesla DeLorean]

Posted on November 06, 2015 at 17:06

You think you might want to initialize the SDRAM *before* you call into the library code?

Memory not configured in the FMC/FSMC will Hard Fault when touched. The most usual place to setup the SDRAM is in SystemInit() and have that called prior to standing up the C runtime environment, but CooCox insist on screwing that aspect of CMSIS up.

[Tesla DeLorean]

Posted on November 06, 2015 at 17:09

Have you tested the functionality of the SDRAM separate for the STemWin?

The 0xD0100000 address seems a bit odd, the base of the decode should be at 0xD0000000

[dencher]

Posted on November 07, 2015 at 11:33

[dencher]

Posted on November 09, 2015 at 19:59Hello, clive1 , i have completed work under GUI_drv, now it works. But i found another problem. Source code which works fine on internal RAM, dont works in SDRAM usage, i saw that variables dont change their states, for example, i use STemWin without OS supprot, it works with OS_TimeMS which increment in SysTick_Timer() every 1ms, interrupts appears on timer, but variable still has 0 value. Can you say where is mistake?