transfer 8btt data using GPIO 8 ports with CLK 42MHz

[dukesong]

Posted on February 05, 2015 at 12:18

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[Tesla DeLorean]

Posted on February 05, 2015 at 14:48

This is your THIRD thread on this topic.

Like I told you yesterday, you'd need to write WORDs to the GPIO->ODR, and you'd need those correctly BIT aligned with the pins you're using.

42 MHz seems very optimistic, people doing this professionally would choose an FPGA, or hardware to do this.

[Tesla DeLorean]

Posted on February 05, 2015 at 14:55

And this is with just 4 posts

[DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32F427%20data%20transfer%20from%20GPIO%208port%20using%20DMA%20to%20other%20board&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=21]https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fSTM32F427%20data%20transfer%20from%20GPIO%208port%20using%20DMA%20to%20other%20board&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B¤tviews=21

[DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32F427%20data%20transfer%20from%20GPIO%208port%20using%20DMA%20to%20other%20board&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=21]https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fSTM32F427%20data%20transfer%20from%20GPIO%208port%20using%20DMA%20to%20other%20board&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B¤tviews=21

I've posted examples of DMA to/from GPIO pins, using internal/external clocks. Suggest some Google Foo, and serious consideration of what you're doing.