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Based on the provided context, it appears that you are working with a Jetson AGX Orin module connected to a custom board, and you are using JetPack 4.6.2 as your software platform. You are trying to test the SPI interface using a Python script, but you are facing limitations due to the built-in spidev driver.
The limitations you are experiencing are:
- Maximum packet size of 4KB
- Maximum speed within each packet of 10Mbps
- Minimum interval between packets of 0.005 seconds (or more) to avoid data loss
To achieve continuous sending and receiving without subcontracting and with a minimum speed of 5Mbps, you may need to consider the following options:
- Use a custom SPI driver: The built-in spidev driver may not be optimized for high-speed SPI communication. You may need to develop a custom SPI driver that can handle higher speeds and larger packet sizes.
- Implement a DMA-based SPI driver: DMA (Direct Memory Access) can help to improve the performance of SPI communication by allowing the SPI controller to access memory directly, without the need for CPU intervention.
- Use a SPI controller with a higher clock speed: If the SPI controller on your custom board has a higher clock speed, you may be able to achieve higher speeds and larger packet sizes.
- Optimize the Python script: You may need to optimize the Python script to minimize the overhead of sending and receiving data. This could involve using more efficient data structures, minimizing the number of function calls, and using caching to reduce the number of memory accesses.
In comparison to other Jetson modules, the Jetson AGX Orin has a more powerful CPU and a higher-speed SPI interface, which may make it better suited for high-speed SPI communication. However, the specific limitations you are experiencing may still apply, and you may need to consider the options above to achieve the desired performance.
It’s also worth noting that the Jetson AGX Orin has a more advanced SPI controller than some other Jetson modules, which may provide more features and flexibility for SPI communication. However, this may also require more complex configuration and programming to achieve the desired performance.
In terms of the Python script, you may need to modify it to take into account the limitations of the spidev driver and the SPI interface on your custom board. This could involve adding delays between packets, using smaller packet sizes, or implementing error correction mechanisms to ensure reliable data transfer.
Overall, achieving continuous sending and receiving without subcontracting and with a minimum speed of 5Mbps on the Jetson AGX Orin with a custom board and JetPack 4.6.2 will likely require a combination of hardware and software optimizations, as well as careful tuning of the SPI interface and the Python script.
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