custom board for smart serial interface?

Hello everybody,

I have been researching LBP for 3 days, but i haven't been knowing frameworks which are communicated between master and slave. Does anyone know it?
Thank all.

nghung270192 wrote:

Hello everybody,

I have been researching LBP for 3 days, but i haven't been knowing frameworks which are communicated between master and slave. Does anyone know it?
Thank all.

Hi,
here is part of my very simple project on sserial.
only for imagination, I am not programer and this is my first program on stm32. I use logic analyzer for listening communication between 7i76e and 7i73 and write this
I use only IRQ for RX not empty on UART.
there are lots of ballast information for tuning.
documentation in 7i73 or another pdfs is old, there are missing many info about protocol and new versions are different
look at STMBL. it is complex project.
Martin

Hi everyone

I have been implemented SSerial protocol between 7i74 and my card.

I have a problem, when the connection is established, Master send to my card one frame, it is "0xDF 0x16".
I think that the first byte is LBPCookieCMD and the second byte is CRC.
After that, Slave send to master a response frame, it is "0x5A 0xA5", the first byte is LBPCookie and the second byte is CRC.
However, This process occur 38 times and nothing happens anymore. I dont know where I am wrong.

Can you help me, please. If you need any further information, I will give you.


Many thanks.

Hi Andypugh,

I saw your code, I also use it for my project to connect PCI card with my board. Currently, PCI know my board use Sserial protocol. But I start to run then the error that is
"halcmd: hm2/hm2_5i25.0: Smart serial card hm2_5i25.0.rb3t.1.1 remote error = (8) Remote fault "
appear on terminal. I dont know how to fix it, so dont read or write IO. Can you help me to understand what happened? I'll very appreciate it, Thank you so much!

Yes, Only have the error "remote error" to appear.
I read the document you have sent and i return txbuf [0] = 0x00 on the process data step but it isn't fixed. ( what do you think about it? Is it correct?
And I have more some questions. Can you explain it for me?. In your code on the sserial.c file. It have some function which are hal_get_systick_value() and hal_get_systick_reload() and " max_waste_ticks = (1.0 / 2500000.0) * 11.0 * (float)block_bytes / (1.0f / (float)hal_get_systick_freq()) "
The first function "hal_get_systick_value()" i dont know the return value of it is milliseconds or microseconds.
The second function "hal_get_systick_reload() " i dont know it what to do?
The last is the max_waste_ticks have the value that is used what to do?
Can you help me to understand it? Again, thank you so much!

remote fault probably means you are missing the fault byte, or it is incorrect.

also look at my generator for the structs and data descriptors:
github.com/rene-dev/stmbl/blob/master/tools/gentable.c

hal_get_systick_value is the value of the systick timer
hal_get_systick_freq its frequency
hal_get_systick_reload the reload value
its used for a timeout when waiting for an almost complete transmission.

I also reccomend you use the dma for rx and tx, to offload the CPU, and get better timings. the fpga is very picky on timing.

besides the stmbl that code is used on some custom IO boards and a MPG I made, based on stm32f103. I can probably share that code as well.

Rene

Hi Andy,

Thank you so much for your replay. I think you are the author coder of file sserial.c both master and remote, but it's incorrect. I'm sorry for my mistake. In my project, I think I have some mistake in remote. Thank you for your news to me, so i can know who the author of source code. I really appreciate it, Once again, thank you for your help, thank you so much!