I am using jetson TX1 board and setting the spidev by the webset [u] http://elinux.org/Jetson/TX1_SPI[/u] The spi can works well. the default size of spi buffer is 4096 byte. Now I want to increase it, some one have meet the same question?

Below step is working for me. sudo su cd /sys/module/spidev/parameters chmod 666 bufsiz echo 65534 > bufsiz

Hi viktor Could you share where you find the default buffer is 4096? And why do you need to increase it.

I used this cammand cat /sys/module/spidev/parameters/bufsiz I want to read many letter one time.

Hi viktor Could you try below Changing SPI Bufsiz on Beaglebone Black - Processors forum - Processors - TI... Hello there, I would like to increase the SPI's buffer size from default 4096 bytes to 65536 bytes (or highest possible) to do some real time sampling with the …

Hi ShaneCCC The method above I had try. and it was OK if i did not power off or reboot the computer. It will be changed back to 4096. and i do not want to do this every time after power on. so do you have another good method to fix this problem.

Hi viktor I guess you can modify the spidev.c to change it. static LIST_HEAD(device_list); static DEFINE_MUTEX(device_list_lock); static unsigned bufsiz = 4096; module_param(bufsiz, uint, S_IRUGO);

Hi viktorzhang, Can the suggested method work on your case? Thanks

How to increase the buffer of spi？

Robotics & Edge Computing Jetson Systems Jetson TX1

ShaneCCC May 9, 2017, 4:56am 4

Hi viktor
Could you try below

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How to increase the buffer of spi？

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