STARTS 1 OF 100 ATTEMPTS, REST FAIL RST

[MakerLS]

The RST line is high for some reason (2v according to the Fluke multimeter) so it is at the limit.

According to this line:

rst_ok |= safe_test_voltage(PIN_RST, 1.8f, 0.2f);

A correct voltage would be between 1.6 and 2.0 volts.

I wanted to change the error margin value from +/- 0.2 (0.2f) to +/- 0.3 (0,3f) or +/- 0.4 (0,4f) to see if that fixes it... but I have no idea what tools to use to compile the code. Can anyone help me?

Board are Erista patched (v 1.1) and emmc it´s SKHynix.

This isn't my first installation, nor my two hundredth... wiring, point values, wire continuity... no shorts. No flux residue... I know what I'm doing. I've tried five Waveshare RP2040 tiny and it happens with all of them. I've also tried Instinct v6s and the same error occurs.

Thanks.

[Quas7]

I use VScode with the "Raspberry Pi Pico" extension that uses the official Pico SDK (I use v2.1.0).
You likely will have to adapt "prepare.py" to the right path for busk and then run it after every compilation to get the combined update.bin (busk.bin+usk.bin).

As a hardware change I would propose to add a 100 Ohm or more in series with RST.
Most likely all signal voltages are boarderline, if RST is too high. 47Ohm should be alread on data/cmd/clk on your waveshare RP2040 but maybe double check you did not get a cloned batch with 470Ohm instead.

Do you have LED-output for diagnostic?

I quickly changed the following in the attached image:

        if (!rst_ok)
            rst_ok |= safe_test_voltage(PIN_RST, 1.8f, 0.4f);
        if (!cmd_ok)
            cmd_ok |= safe_test_voltage(PIN_CMD, 1.8f, 0.4f);
        if (!d0_ok)
            d0_ok |= safe_test_voltage(PIN_DAT, 1.8f, 0.4f);

update_rst_0.4f.zip

[MakerLS]

First of all, thanks for your trouble. I tried the code and it still didn't work. I tried other commercial Picofly formats and it still didn't work... after 4 days, I found the problem. The resistor parallel to the point had gone out of value. It's 10 KOhm, and it was at 2 MOhm.