Não, qual seria esse driver ? como posso adicionar ?

Você precisa fazer upload do driver Micropython para a tela ST7789V2 no micropython usando thonny.

Você adicionou um driver para controlar a tela?

Não, qual seria esse driver ? como posso adicionar ?

Hello @martynw, I've been trying for a while to get my CardComputer's screen to work with Micropython code. I want to display a simple "hello world," but I'm having trouble. Could you help me? Could you show your code for activating the screen and writing anything on it?

Have you added a driver to control the screen?

@thijsnl said in Micropython, CardComputer - issue reading Keyboard:

Hello MartynW

how do you use just the machine library. When I try this the m5stack gives an error.
When I use the m5stack lib I don't have any problems with this

What's is the error?

how do you use just the machine library. When I try this the m5stack gives an error.
When I use the m5stack lib I don't have any problems with this

Thank you for the extra pair of eyes much appreciated, I got so obsessed with the PULL_UP/PULL_DOWN issue, I didn't even consider the processing order of the bitwise logic!! Many thanks.

Martyn

I tried your code and changed two things to make it work:

• changed the inputs to pullups (as you already thought it should be) - the output matrix then is all 1s except for the button pressed.
• used some additional brackets for A1 and A2 to force the AND operation to happen first

            self.pinMap['A0'].value( row & 0b001 )
            self.pinMap['A1'].value( ( row & 0b010 ) >> 1 )
            self.pinMap['A2'].value( ( row & 0b100 ) >> 2 )

Full code:

from time import sleep_ms
from machine import Pin

    
class KeyBoard():
    def __init__(self):
      keyPins = [ ('C0', 13, Pin.IN, Pin.PULL_UP), ('C1', 15, Pin.IN, Pin.PULL_UP), ('C2', 3, Pin.IN, Pin.PULL_UP),
                  ('C3',  4, Pin.IN, Pin.PULL_UP), ('C4',  5, Pin.IN, Pin.PULL_UP), ('C5', 6, Pin.IN, Pin.PULL_UP),
                  ('C6',  7, Pin.IN, Pin.PULL_UP),
                  ('A0',  8, Pin.OUT, None), ('A1', 9, Pin.OUT, None), ('A2', 11, Pin.OUT, None) ]
    
      self.pinMap = dict()
      for (name, pin, direction, pull) in keyPins:
          self.pinMap[name] = Pin(pin, direction, pull) 

    def scan(self):
        for row in range(0,8):
            self.pinMap['A0'].value( row & 0b001 )
            self.pinMap['A1'].value( ( row & 0b010 ) >> 1 )
            self.pinMap['A2'].value( ( row & 0b100 ) >> 2 )
            sleep_ms(250)
            print(f'{row:04b}\t',end='')
            for col in ['C0', 'C1', 'C2', 'C3', 'C4', 'C5', 'C6']:
                sleep_ms(0)
                val = self.pinMap[col].value()
                print(f'{val:01b} ', end='')
            print('')
        print('\n\n\n\n')

    def scan2(self):
        for row in (7, 3, 6, 2, 5, 1, 4, 0):
            self.pinMap['A0'].value( row & 0b001 )
            self.pinMap['A1'].value( ( row & 0b010 ) >> 1 )
            self.pinMap['A2'].value( ( row & 0b100 ) >> 2 )
            sleep_ms(250)
            print(f'{row:04b}\t',end='')
            for col in ['C0', 'C1', 'C2', 'C3', 'C4', 'C5', 'C6']:
                sleep_ms(0)
                val = self.pinMap[col].value()
                print(f'{val:01b} ', end='')
            print('')
        print('\n\n\n\n')


keyboard = KeyBoard()
while True:
    keyboard.scan()
#    keyboard.scan2()
    sleep_ms(500)

BTW: I like your coding style with the pinMap etc. (Note: I am not very familiar with Micropython.)

Thanks
Felix