import machine, os,uos
from machine import Pin, I2C,SPI
import ssd1306
import sdcard

# ESP32 Pin assignment 
i2c = I2C(0, scl=Pin(22), sda=Pin(21))

oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)

oled.text('Hello, Wokwi!', 10, 10)      
oled.show()

# print("sdcard test...")

# sd = machine.SDCard(slot=2, width=1, sck=18, miso=19, mosi=23, cs=5)
# print("sdcard test 1...")
# uos.mount(sd, "/sd")
# print("sdcard test end...")

# Assign chip select (CS) pin (and start it high)
cs = machine.Pin(5, machine.Pin.OUT)

# Intialize SPI peripheral (start with 1 MHz)
spi = machine.SPI(2,
                  baudrate=1000000,
                  polarity=0,
                  phase=0,
                  bits=8,
                  firstbit=machine.SPI.MSB,
                  sck=machine.Pin(18),
                  mosi=machine.Pin(23),
                  miso=machine.Pin(19))

# Initialize SD card
sd = sdcard.SDCard(spi, cs)

# Mount filesystem
# vfs = uos.VfsFat(sd)
uos.mount(vfs, "/sd")

# Create a file and write something to it
with open("/sd/test01.txt", "w") as file:
    file.write("Hello, SD World!\r\n")
    file.write("This is a test\r\n")

# Open the file we just created and read from it
with open("/sd/test01.txt", "r") as file:
    data = file.read()
    print(data)