boochow

from mcu import mem32
from machine import Pin,Clock

# GPIO alternate functions
ALT0 = const(4)

def set_PCM_pin():
  for pin in (18, 19, 20, 21):
    reg = 0x20200000 + 4 * (pin // 10)
    bit =  (pin % 10) * 3

boochow

from machine import *
def test():
  saw = []
  sqw = []
  tri = []
  for i in range(64):
    saw.append(i*4)
    sqw.append(255 if i < 32 else 0)
    tri.append(abs(i - 32)*8)
  

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def test2():
  saw = []
  sqw = []
  tri = []
  for i in range(64):
    saw.append(i*4)
    sqw.append(255 if i < 32 else 0)
    tri.append(abs(i - 32)*8)
  
  p=PWM(0, pin=18, ms=MS_DISABLE, use_fifo=1, fifo_repeat=0)

boochow

  def fifo_write(self, buf):
    for b in buf:
      while (mem32[0x2020c004] & 1):
        pass
      mem32[0x2020c018] = b

boochow

from time import sleep_ms
from machine import PWM
def test():
  p=PWM(pin=18)
  while True:
    for i in range(p.range() // 2):
      p.data(i)
      sleep_ms(1)
    for i in range(p.range() // 2 - 1, 0, -1):
      p.data(i)

boochow

from time import sleep_ms
def test():
  p=PWM(0, pin=18, ms=MS_ENABLE)
  p.freq(1000)
  p.range(DEFAULT_RANGE)
  while True:
    for i in range(DEFAULT_RANGE // 2):
      p.data(i)
      sleep_ms(1)
    for i in range(DEFAULT_RANGE // 2 - 1, 0, -1):

boochow

# Hardware PWM
MS_DISABLE = const(0)
MS_ENABLE  = const(1)

MODE_PWM        = const(0)
MODE_SERIALIZER = const(1)

DEFAULT_RANGE = const(960)

class PWM:

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# GPIO alternate functions
ALT0 = const(4)
ALT1 = const(5)
ALT5 = const(2)

Pin_AF_PWM = {12:(ALT0,0), 13:(ALT0,1), 18:(ALT5,0), 19:(ALT5,1), \
          40:(ALT0,0), 41:(ALT0,1), 45:(ALT0,1), 52:(ALT1,0), 53:(ALT1,1)} 

def select_PWM_pin(pin):
  if pin in Pin_AF_PWM.keys():

boochow

from mcu import mem32

# PWM clock manager
CLK_GND    = const(0)
CLK_OSC    = const(1)
CLK_PLLA   = const(4)
CLK_PLLC   = const(5)
CLK_PLLD   = const(6)
CLK_HDMI   = const(7)

boochow

import gpu
import framebuf
import FBConsole

class RPiScreen(framebuf.FrameBuffer):
    def __init__(self, width, height):
        self.width = width
        self.height = height
        gpu.fb_init(width,height,screen_w=1920,screen_h=1080)
        super().__init__(gpu.fb_data(),width,height,framebuf.RGB565)