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A new RPI Pico in the works?

scottiebabe

Eben Upton Hints at an RP2040 Successor, Promises a Raspberry Pi Compute Module 5 in 2024

"We know what people don't like [and] what people do like," Upton says, "and we have a chip team."

I will call a spade a spade and say the sleep current of the RP2040 @ 1 mA is atrocious. I sincerely hope they improve the sleep current.

I think the QSPI memory controller could be improved as well.

Maybe more PIO memory...

But I don't have that many criticism about the pico.. 

Does the pico have any sore points for you?

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  • The only thing I have issues with is at the bottom end of the ADC. It never gives a proper zero. It jumps about between 300 and 700. You can adjust for most situations with a bit of code:

    # Set up the potentiometers in a list
    pots = [] # Empty list of potentiometers
    for i in range(3):
        pot = ADC(i)
        pots.append(pot)

    # Function to get a number from the position of the potentiometer
    def get_pot_no(adc, maxx):
        reading = pots[adc].read_u16()
        # Adjust low end
        reading = reading - 700
        if reading < 0:
            reading = 0
        result = int((maxx * reading)/(65535-750)*1.01) # rescale
        # Adjust top end
        if result > maxx:
            result = maxx
        return result # Send answer back to main program

    print(get_pot_no(2,100))

    The problem is that this throws off voltage conversion if you need a real voltage.

    It is probably associated with the conversion of the 12-bit ADC reading to 16 bits to fit in with PWM

    Please, give us a proper zero next time.

  • in reply to tonygo

    Yes, ++ your recommendation, the ADC isn't that great. I never trust it beyond 8 bits. 

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