32F429IDISCOVERY Pinout / Free IO

[sultanof]

Posted on April 16, 2014 at 10:11

Hello

The

http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF259090

has a few Free I/O Pins. Is there a list of alternate functions of those pins? It's not mentioned in the corresponding documentation DocID025175 Rev 1 I'm trying to evaluate whether the few I/O Pins are suitable for me or not. Regards Chriostoph

[frankmeyer9]

Posted on April 16, 2014 at 10:21

Check the ''UM1670: Discovery kit for STM32F429/439 lines'' document on the web page you mentioned, or, alternatively, the datasheet of the MCU,

[sultanof]

Posted on April 16, 2014 at 12:23

Well ok. I made a speadsheet, if anybody is interested here it is for free:

https://github.com/s31108/STM32F429IDISCOVERY-FreeIO-Pinout

[Tesla DeLorean]

Posted on April 16, 2014 at 16:09

It's a very constrained design, if you want to do more than SDRAM+LCD, you'd seriously want to look at a board using a 176 pin chip.

I've previously posted a Micro Xplorer IOC file for the STM32F429I-DISCO

[nawfal3]

Posted on April 16, 2014 at 18:05

Hello,

I just bought a new STM32F429I-disco board. I've tried to make a test to see if all the pins available are connected. I've initialized the GPIOA , GPIOB , GPIOF and set all the pins to high by:

GPIOA->BSRRL = 0xFFFF;

GPIOB->BSRRL = 0xFFFF; GPIOF->BSRRL = 0xFFFF; The problem is that only some of the pins are getting voltage. How it could be?? Should I solder some bridges on the board? Did I missed something? Here is my code for initialization:

void LCD_GPIO_INIT(void)

{    GPIO_InitTypeDef  GPIO_InitStructure;    /* Enable Clock*/    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF | RCC_AHB1Periph_GPIOA| RCC_AHB1Periph_GPIOB, ENABLE);    /* Configure the CTRL PORT Pins */    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;    GPIO_InitStructure.GPIO_Mode = GPIO_OType_PP;    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;    GPIO_Init(GPIOA, &GPIO_InitStructure);    /* Configure the DATA PORT Pins */    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;    GPIO_InitStructure.GPIO_Mode = GPIO_OType_PP;    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;    GPIO_Init(GPIOB, &GPIO_InitStructure);    /* Configure the DATA PORT Pins */    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;    GPIO_InitStructure.GPIO_Mode = GPIO_OType_PP;    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;    GPIO_Init(GPIOF, &GPIO_InitStructure); }

[nawfal3]

Posted on April 16, 2014 at 18:07

I know that not all the pins are available... But I did not know that even the pins on the edge of the board may be not functional... Is it the board or I've done something wrong 

[Tesla DeLorean]

Posted on April 16, 2014 at 18:27

Did I missed something?

There is a manual, with pin tables, and schematics, did you miss that? A lot of the pins are attached to assorted chips/parts on the board. Decide what it is you expect to do with the board, and then look at the pins available to support those functions. If the board was a simple break-out design you might be able to bang all the pins high, but it's not.

[nawfal3]

Posted on April 16, 2014 at 18:38

I want to drive an external LCD (parallel) so I need 21 pins (Idealy 16 pins from the same GPIO) .... I suppose that I am asking too much?

[Tesla DeLorean]

Posted on April 16, 2014 at 19:32

I suppose that I am asking too much?

Well I think you picked the wrong board. The 144-pin design is very constraining. Can you pull of the current display, and use those pins?

[nawfal3]

Posted on April 16, 2014 at 19:52

I bought as well separate µCs (STM32F429ZI) with adapter board (DIP)... I am thinking right now to make use of them and use the discovery board only to program the µC.