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en:general_information:tutorial:spi [2015/08/17 11:23] – liedmann | en:general_information:tutorial:spi [2022/08/04 15:02] (current) – external edit 127.0.0.1 | ||
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+ | ~~NOCACHE~~ | ||
+ | ~~NOTOC~~ | ||
===== SPI ===== | ===== SPI ===== | ||
\\ | \\ | ||
Line 9: | Line 11: | ||
==== Testing spidev 0.1 ==== | ==== Testing spidev 0.1 ==== | ||
- | <wrap Round info 65%> | + | <wrap Round info 65%> |
To run spidev with /dev/spi0.1 you need to specify the device with -D parameter | To run spidev with /dev/spi0.1 you need to specify the device with -D parameter | ||
- | < | + | < |
+ | root@MBa6x: | ||
+ | root@MBa6x:/ | ||
+ | </ | ||
- | **console output with open bridge:** | + | ++++console output with open bridge:| |
< | < | ||
root@MBa6x:/ | root@MBa6x:/ | ||
Line 29: | Line 35: | ||
FF FF | FF FF | ||
</ | </ | ||
- | + | ++++ | |
- | **console output with closed bridge:** | + | ++++ console output with closed bridge:| |
< | < | ||
root@MBa6x:/ | root@MBa6x:/ | ||
Line 45: | Line 51: | ||
F0 0D | F0 0D | ||
</ | </ | ||
+ | ++++ | ||
+ | ==== Testing spidev 4.0 ==== | ||
+ | <wrap Round info 65%> | ||
+ | |||
+ | To run spidev with /dev/spi4.0 you need to specify the device with -D parameter | ||
+ | < | ||
+ | root@MBa6x: | ||
+ | root@MBa6x:/ | ||
+ | </ | ||
+ | ++++console output with open bridge: | ||
+ | < | ||
+ | root@MBa6x:/ | ||
+ | spi mode: 0 | ||
+ | bits per word: 8 | ||
+ | max speed: 500000 Hz (500 KHz) | ||
+ | |||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF | ||
+ | </ | ||
+ | ++++ | ||
+ | ++++ console output with closed bridge: | ||
+ | < | ||
+ | root@MBa6x:/ | ||
+ | spi mode: 0 | ||
+ | bits per word: 8 | ||
+ | max speed: 500000 Hz (500 KHz) | ||
+ | |||
+ | FF FF FF FF FF FF | ||
+ | 40 00 00 00 00 95 | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | FF FF FF FF FF FF | ||
+ | DE AD BE EF BA AD | ||
+ | F0 0D | ||
+ | </ | ||
+ | ++++ |