i2c_master_read_from_device times out immidiately (IDFGH-11694)

[nicklasb]

Answers checklist.

• [X] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [X] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [X] I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Hi,

I have a simple problem, at least it is simple to describe; i2c_master_read_from_device timeouts (283) immidiately regardless of any setting I provide for timeout for my ESP32 WROOM 32D. I have looked at https://github.com/espressif/esp-idf/issues/11397, however that doesn't seem to be it. Thing is, the peripheral is a Raspberry Pi Pico running the wire library, and it gets the request for data, and tries to send it. However I suppose no one will be in time for a <1 ms timeout.

Am i missing something else? Why would the timeout value basically not matter? I cannot properly discern what actual values are valid as timeout, docs doesn't excplicitly say its ticks or something else?

[mythbuster5]

It's ticks actually.

[nicklasb]

It's ticks actually.

Ok, thanks for the information! (For reviewers, note that it does not resolve the original issue)

[nicklasb]

@mythbuster5

So I am back at getting the RaspberryPy be able to talk to the ESP32 properly again, I am still having the same problem: I (19053) DEVKIT_V5: I2C Master - << Reading receipt from 4, try 0. I (19054) DEVKIT_V5: I2C Master - << Read receipt failure, code 263.

This is the code that times out (263 = 107 = ESP_ERR_TIMEOUT) within the millisecond: read_ret = i2c_master_read_from_device(CONFIG_I2C_CONTROLLER_NUM, peer->i2c_address, dest_data, 2, 10000000);

(it doesn't matter at all what timeout i set)

I am seeing a blip on the logic analyzer around this time, so it seems like it is doing something, however, it seems that it basically immidiately times out, 1 millisecond is just not possibly a reasonable timeout.

Ticks or not, I cannot see that this should ever happen?