STM32F4xx alternate configuration SPI1 issues

[gvigelet2]

Posted on May 19, 2014 at 14:04

Hello Everyone,

I was just wondering if anyone has seen this, I have seen this only referenced on one website.  I have SPI1 on a STM32F415 configured as   PA7   ------> SPI1_MOSI  PB3   ------> SPI1_SCK  PB4   ------> SPI1_MISO Which works fine until i configure PE3, as soon as I do that the SPI1 stops working if I comment the following out it will work again.  /*Configure GPIO pins : PE3  *///  GPIO_InitStruct.Pin = GPIO_PIN_3;//  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;//  GPIO_InitStruct.Pull = GPIO_NOPULL;//  GPIO_InitStruct.Speed = GPIO_SPEED_FAST;//  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);I haven't seen no errata about it, am I the only one seeing this?Thanks,George

[waclawek.jan]

Posted on May 19, 2014 at 18:37

> I have an Accelerometer CS line hooked to PE3, the issue is if I am not using the pin for anything

I don't understand, so do you have the accelerometer's CS line hooked to PE3, or not? If so, simply set PE3 to 1 when you set it to output. JW

[gvigelet2]

Posted on May 19, 2014 at 19:11Yes the CS line for the accelerometer is connected to PE3.  When i configure the PE3 ping as GPIO output with nopull it causes me an issue on spi1 if i never configure the pin or just disable the port e clock the spi1 works fine.

[waclawek.jan]

Posted on May 19, 2014 at 20:14

OK and what happens if you set PE3 to output 1 ?

JW

[pierrehenri]

Posted on May 20, 2014 at 11:52

Hi all,

I do not know if your problem is similar to mine or not but I think there are similarties:https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fSTM32F4%20%28F4%20discovery%20board%29%20interrupt%20Issue&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&T...

[Tesla DeLorean]

Posted on May 20, 2014 at 15:33

I do not know if your problem is similar to mine or not but I think there are similarities

No, I think that's just some self-interest clouding your perspective.