STM32F4 SPI-DMA error

[gcntrk]

Posted on December 06, 2013 at 14:18

The original post was too long to process during our migration. Please click on the attachment to read the original post.

[francescatodiego]

Posted on December 06, 2013 at 15:30

the problem is hard to find only with code reading (....this takes time...for info  you can use the box in the top left of messages editor to format the code. so code  is  more readable)

Before adding the

DMA

check

the connections

and

the configuration of the

SPI

tries to

send data

by checking the

TX/RX bits in 

SR

register

When everything is

OK

add

the

DMA

[437262340]

Posted on December 09, 2013 at 16:58

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 ,ENABLE); //使能SPI1时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 ,ENABLE); //使能SPI2时钟

  and   RCC_APB2Periph_AFIO

[Tesla DeLorean]

Posted on December 09, 2013 at 17:32

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 ,ENABLE); //使能SPI1时钟

 

RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 ,ENABLE); //使能SPI2时钟

 

  and   RCC_APB2Periph_AFIO

Unless I'm mistaken both clocks are enabled, and this is an F4 example. AFIO is critical in F1 designs where pins are being remapped.

[gcntrk]

Posted on December 11, 2013 at 08:32

I've solved that problem eventually the problem is I am trying to do unidirectional communication, but in private functions it is not implemented by ''1Line_Tx'' and ''1Line_Rx''. It is implemented by full duplex mode by sender and not assigning input line, and 2Lines_Rx for reciever. ''1Line_Tx'' and ''1Line_Rx'' are used for 1 line bidirectional communication, which involves some other code implementations as I understand. Because it didn't work for my code :) But I have new problem, I get data is shifted, if you wanna help look at the discussion: [DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32F4%20SPI-DMA%20data%20is%20shifted&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&TopicsView=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/AllItems.aspx&currentviews=0]https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fSTM32F4%20SPI-DMA%20data%20is%20shifted&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&TopicsView=https%3A%2F%2Fmy%2Est%2Ecom%2Fpublic%2FSTe2ecommunities%2Fmcu%2FLists%2Fcortex_mx_stm32%2FAllItems%2Easpx&currentviews=0. Thank you.