stm32f429 discovery gui_init

[artemryvkin]

Posted on January 09, 2015 at 19:00

Can I use GUI_init (I mean gui library) without freertos? I've just seen a lot of examples with GUI_init, and all these examples were only with freertos. I'm trying to make a simple example (drawing something on lcd) and my program hangs in GUI_Init.

I don't use FreeRTOS.

[Tesla DeLorean]

Posted on January 09, 2015 at 19:09

Yes, it hangs where exactly? Be precise what is the code (assembler) surrounding where it is hanging.

Do you have the CRC peripheral enabled? /* Enable CRC clock */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_CRC, ENABLE);

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STemWin%20GUI_Init%28%29%20crashed&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=1425

[artemryvkin]

Posted on January 09, 2015 at 20:28

It hangs right here (see attachment). It takes place in function _DMA_Fill. And I madethe CRC peripheral enabled

________________ Attachments : Screen.jpg : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzM4&d=%2Fa%2F0X0000000bLQ%2FPpDe1HQQPHGr1x.exo8i7hhafSae8ke0rqiF6ftVcM4&asPdf=false

[Tesla DeLorean]

Posted on January 09, 2015 at 20:57

Somewhat indicative that you haven't enable peripheral clocks for hardware you are using.

[artemryvkin]

Posted on January 09, 2015 at 21:46

What does it mean? here is my 

main

 function. And i made RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_CRC, ENABLE)In spite of this my program hangs where I've already showed.int main(void){ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_CRC, ENABLE); GUI_Init(); /* LTDC initialization */ LCD_Init(); LCD_LayerInit(); LTDC_Cmd(ENABLE); LCD_SetLayer(LCD_FOREGROUND_LAYER); LCD_Clear(LCD_COLOR_WHITE); LCD_SetFont(&Font8x8);    LCD_DisplayStringLine(LINE(32), (uint8_t*)''              Touch Panel Paint     '');    LCD_DisplayStringLine(LINE(34), (uint8_t*)''              Example               ''); LCD_SetTextColor(LCD_COLOR_MAGENTA);  LCD_DrawFullEllipse(100, 60, 50, 20);    LCD_SetTextColor(LCD_COLOR_BLUE2);     LCD_DrawFullRect(5, 250, 30, 30);    LCD_SetTextColor(LCD_COLOR_CYAN);     LCD_DrawFullRect(40, 250, 30, 30);    LCD_SetTextColor(LCD_COLOR_YELLOW);     LCD_DrawFullRect(75, 250, 30, 30);    LCD_SetTextColor(LCD_COLOR_RED);     LCD_DrawFullRect(5, 288, 30, 30);    LCD_SetTextColor(LCD_COLOR_BLUE);     LCD_DrawFullRect(40, 288, 30, 30);    LCD_SetTextColor(LCD_COLOR_GREEN);     LCD_DrawFullRect(75, 288, 30, 30);    LCD_SetTextColor(LCD_COLOR_MAGENTA);     LCD_DrawFullRect(145, 288, 30, 30);    LCD_SetTextColor(LCD_COLOR_BLACK);     LCD_DrawFullRect(110, 288, 30, 30);    LCD_DrawRect(180, 270, 48, 50);    LCD_SetFont(&Font16x24);    LCD_DisplayChar(LCD_LINE_12, 195, 0x43);    LCD_DrawLine(0, 248, 240, LCD_DIR_HORIZONTAL);    LCD_DrawLine(0, 284, 180, LCD_DIR_HORIZONTAL);    LCD_DrawLine(1, 248, 71, LCD_DIR_VERTICAL);    LCD_DrawLine(37, 248, 71, LCD_DIR_VERTICAL);    LCD_DrawLine(72, 248, 71, LCD_DIR_VERTICAL);    LCD_DrawLine(107, 248, 71, LCD_DIR_VERTICAL);    LCD_DrawLine(142, 284, 36, LCD_DIR_VERTICAL);    LCD_DrawLine(0, 319, 240, LCD_DIR_HORIZONTAL);    while(1)   {   }}

[Tesla DeLorean]

Posted on January 09, 2015 at 22:07

Ok, but your screen grab gives a very narrow perspective of the problem.

Shouldn't you call LCD_Init() where the LTDC/DMA2D clocks are enabled BEFORE calling GUI_Init()? They will also need IRQ Handlers.