did I break my SPI ports? - Raspberry Pi Forums

hi all, im connecting ws2801 raspberry pi3 . needed go around 2 corners cut strip , solderen them @ angle. worked fine @ desk. installed them, , worked bit, after correcting positioning of strip few times stopped working. brought desk, , noticed 1 of 5v solder points may have had 1 strand touching spi clk pin.

did destroy spi clk? still see spi devices:

root@pi2:/home/pi/ws# ls -al /dev/spi*
crw-rw---- 1 root spi 153, 0 sep 3 11:07 /dev/spidev0.0
crw-rw---- 1 root spi 153, 1 sep 3 11:07 /dev/spidev0.1

connected single ws2801 led wasnt used in project directly rpi 5v instead of external 5v led strip , still no go. led turns on, cant control it.

can test if spi still working? tried running spidev_test. output found online seems suggest there should more output. see.

root@pi2:/home/pi# ./a.out
spi mode: 0x0
bits per word: 8
max speed: 500000 hz (500 khz)

if connect simple normal led spi ports, can control using gpio -g write. led turns on/off if bring pins gpio 9/11 up/down.

appreciated. else guess buy new rpi3 , test there.

yes! putting 5v (more 4v) on gpio pin cause called latchup, , instantly destroy transistors of gpio in soc, causes them burnout , cause short, not stops gpio not work anymore, overheat chip, cause further damage.

rule 101, pi's gpio's "not 5v tolerant"!

nor heeding cost pi!

sorry....

raspberrypi