If you are building your own kernel, you can see if the module is loaded using lsmod. Select all -rwxr-xr-x 1 root root May 3 After this, every character written in the serial terminal will appear in the serial terminal as you were writing in the command prompt. I’ve tried to play with the priorities and scheldule policies, but it also did not give the desired results. This device every 1s sends packets containing about bytes data.

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SC16IS752 – Bare metal example project

It’s hard to tell where these 25ms come from exactly without doing profiling on your system. Now I trying to modify this driver for I2C work. Now I can see spidev0. I started compiling locally but a quick search in the sc16iz752 tells me it will take 5hs or more.

linux SC16IS752 driver,Receive Line Status error

Original Attachment has been moved to: Select all [ Device tree loaded to 0x2fffc size 0x3d6e This is wrong, although I’m not sure what will happen when you try. Therefore I have more then one Raspberry and I don’t want to compile each of them.


So, it seems that the DTB file name matters. Email Required, but never shown. Sign up or log in Sign up using Google. I can see the driver module is kind of compiled: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

This is what I got: Thanks for your assistance! I’m asking that, cause I’m prototyping with the Raspberry Pi. I2C has speed kHz. Read command line from file ‘cmdline. Post as a guest Name.

SC16IS (SC16IS7XX driver) Device Tree problem – Raspberry Pi Forums

In the interrupt service routine the program reads the interrupt identification register, and it’s ready to add a sc116is752 task for each interrupt, for now it simply enables the data ready flag when the interrupt was generated by the RHR. Board index All times are UTC. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Device tree loaded to 0x2fffc size 0x3ef8 Yes of course I can follow the instructions on the side, but do I still get updates after recompiling the kernel? One function is performed about ms. Failed to load overlay ‘spi-gpio-cs’ But ec16is752 work is performed within 25ms after interrupt occurs.


I will play around with this and let you know the results. Your feedback or suggestions are also welcome.

I have been able to successfully get either device working, but not both together. Failed to load overlay ‘spi-gpio-cs’.

There might be a bug with using multiple instances of the driver. I tried to use the sc16ls752 “nice” for priority management and “chrt” for select scheldule policy. Linux Kernel sources already has driver for this chip, but only in SPI mode.

I’m trying to port an old project in which, over the years, I ran out of RAM. Priorities won’t solve your problem completely anyway, because there’s always a chance for another unrelated IRQ to arise between your IRQ and the process.