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Update edge tpu docs for RPi 5 kernel (#14946)

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Nicolas Mowen 2024-11-12 14:48:57 -07:00 committed by GitHub
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docs/docs/troubleshooting/edgetpu.md
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@ -54,6 +54,17 @@ The most common reason for the PCIe Coral not being detected is that the driver
- In most cases [the Coral docs](https://coral.ai/docs/m2/get-started/#2-install-the-pcie-driver-and-edge-tpu-runtime) show how to install the driver for the PCIe based Coral.
- For Ubuntu 22.04+ https://github.com/jnicolson/gasket-builder can be used to build and install the latest version of the driver.
### Not detected on Raspberry Pi5
A kernel update to the RPi5 means an upate to config.txt is required, see [the raspberry pi forum for more info](https://forums.raspberrypi.com/viewtopic.php?t=363682&sid=cb59b026a412f0dc041595951273a9ca&start=25)
Specifically, add the following to config.txt
```
dtoverlay=pciex1-compat-pi5,no-mip
dtoverlay=pcie-32bit-dma-pi5
```
## Only One PCIe Coral Is Detected With Coral Dual EdgeTPU
Coral Dual EdgeTPU is one card with two identical TPU cores. Each core has it's own PCIe interface and motherboard needs to have two PCIe busses on the m.2 slot to make them both work.