Hello, 

I try to communicate via SPI, if i try receive data over SPI on MISO pin I got message without last bit so I should receive 0x23 and i got 0x22. 

SPI is set on MODE 3. It has same behaviour on PI PC and PC2. If i try on RPi it works fine. Do you have anybody some advice ?

Regards

Jan

Information for you and somebody who might be able to help you. The system packages are outdated.

 

ii  armbian-config                        20.05.2                              all          Armbian configuration utility
ii  armbian-firmware                      20.05.2                              all          Linux firmware
ii  armbian-focal-desktop                 20.11.1                              all          Armbian desktop for Ubuntu focal
ii  hostapd                               3:2.9-102~armbian20.05.2+1           armhf        IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP Authenticator
ii  htop                                  2.2.0-3~armbian19.11.9+1             armhf        interactive processes viewer
ii  linux-base                            4.5ubuntu3                           all          Linux image base package
ii  linux-dtb-current-sunxi               20.05.2                              armhf        Linux DTB, version 5.4.43-sunxi
ii  linux-focal-root-current-orangepipc   20.05.2                              armhf        Armbian tweaks for focal on orangepipc (current branch)
ii  linux-image-current-sunxi             20.05.2                              armhf        Linux kernel, version 5.4.43-sunxi
ii  linux-libc-dev:armhf                  5.4.0-33.37                          armhf        Linux Kernel Headers for development
ii  linux-u-boot-orangepipc-current       20.05.2                              armhf        Uboot loader 2020.04

 

I ofc try it on the newest armbian, no change.

I check on logical analyzator and on osciloscope, edges and values were right.

Is it possible, that SPI decode bad on mode 3?

I am using  spi dev on ioctl, decrease the speed doesnt help. 

Regards

Jan