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Hosted Solution (Linux/MCU) with ESP32 (Wi-Fi + BT + BLE)
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esp32c6 mini GPIO question #398

Closed XZ-Niupitang closed 5 months ago

XZ-Niupitang commented 5 months ago

Can the SPI pins of the driver in esp-host-fg be changed freely?

image image
mantriyogesh commented 5 months ago

For ESP32-C6, yes, just try to avoid the bootstrapping pins to be used

XZ-Niupitang commented 5 months ago

For ESP32-C6, yes, just try to avoid the bootstrapping pins to be used

Then I want to use the SPI interface multiplexed by the SDIO interface for communication. Is it also possible? img_v3_02bc_0ff70117-ef6d-48aa-b044-e529956b181g For example, if I want to use these ports for SPI communication, is it possible?

mantriyogesh commented 5 months ago

Hello @XZ-Niupitang ,

Unless they are already in use (say by sdio or any other function), any on bootstrapping gpios could be used.

Check https://docs.espressif.com/projects/esp-idf/en/v5.2.1/esp32c6/api-reference/peripherals/spi_slave.html#gpio-matrix-and-io-mux

When you use any other gpios than that of IO_MUX, they would route through GPIO matrix. Obviously there would be minor delays in that, but overall ESP32-C6 should withstand. The max freq we tested for ESP32-C6 as spi slave is 26MHz.

However, the ESP32-C6 is used on PCB. for jumper cables, lower frequencies are suggested to be used.

XZ-Niupitang commented 5 months ago

Hello @XZ-Niupitang ,

Unless they are already in use (say by sdio or any other function), any on bootstrapping gpios could be used.

Check https://docs.espressif.com/projects/esp-idf/en/v5.2.1/esp32c6/api-reference/peripherals/spi_slave.html#gpio-matrix-and-io-mux

When you use any other gpios than that of IO_MUX, they would route through GPIO matrix. Obviously there would be minor delays in that, but overall ESP32-C6 should withstand. The max freq we tested for ESP32-C6 as spi slave is 26MHz.

However, the ESP32-C6 is used on PCB. for jumper cables, lower frequencies are suggested to be used.

After trying to modify the interface, I found that I could no longer communicate with the Raspberry Pi. The driver of the Raspberry Pi was not modified. The c6 program was modified as follows. The startup log is as follows: image

image image

The actual hardware wiring is only changed in the C6 test board, the Raspberry Pi is unchanged.

mantriyogesh commented 5 months ago

Setup photo please?

git diff at both places?

XZ-Niupitang commented 5 months ago

Setup photo please?

git diff at both places?

The only changes made are:

image
XZ-Niupitang commented 5 months ago

It's ok, it looks like the modification was successful, sometimes life is fucked up

FlSenicar commented 1 month ago

Hello @XZ-Niupitang Can you tell me what you did to fix this issue? I am currently experiencing the same issue after remapping the SPI to other Gpios. The data seems to be shifted by one bit. Whenever I move the SPI back to the original IOs everything works fine. Thank you very much!