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

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

boochow

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

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)
  

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

# Set the EN bit to enable the PCM block. 
mem32[CS_A] = 1
# Set all operational values to define the frame and channel settings. 
mem32[MODE_A] = 1<<24 | 1<<22 | 1<<20 | 31<<10 | 16
mem32[TXC_A]  = 1<<30 | 1<<20 | (16-8)<<16 | 1<<14 | 17<<4 | (16-8)
# Assert RXCLR and/or TXCLR wait for 2 PCM clocks to ensure the FIFOs are reset. 
mem32[CS_A] |= 1<<4 | 1<<3
# The SYNC bit can be used to determine when 2 clocks have passed.
mem32[CS_A] |= 1<<24
while (mem32[CS_A] & 1<<24) == 0:

boochow

# Set TXON and/or RXON to begin operation. 
mem32[CS_A] |= 1
mem32[CS_A] |= 1<<15 | 1<<16
mem32[CS_A] |= 1<<2
# Poll TXW writing sample words to PCMFIFO and RXR reading sample words from PCMFIFO
# until all data is transferred.
print("transmit start")
  
while True:
  while(mem32[CS_A] & (1<<17))==0:

boochow

from machine import SD
import os

sd = SD()
os.mount(sd, '/sd')
os.chdir('/sd')
os.listdir()

f=open('wtest2.txt','w')
f.write("MicroPython!")

boochow

from machine import SD
import os

sd = SD()
sd.ioctl(1,0)

def pr(buf):
  l=len(buf)
  c=0
  while(c<l):

boochow

import framebuf
import uio

HEX="0123456789ABCDEF"

class DumpConsole(uio.IOBase):
    def __init__(self, fb, bgcolor=0, fgcolor=-1, width=-1, height=-1, readobj=None):
        self.readobj = readobj
        self.fb = fb
        if width > 0: