# Example0: Higher Level API
# from machine import Pin
# from utime import sleep

# print("Hello, ESP32!")

# led = Pin(15, Pin.OUT)
# while True:
#   led.on()
#   sleep(0.5)
#   led.off()
#   sleep(0.5)


# Example 1: Lower Level API Access
from machine import mem32
import time

# ESP32 GPIO Register Base Address
GPIO_BASE_ADDR = 0x3FF44000

# Offsets from base
GPIO_OUT_OFFSET        = 0x04  # Read output level
GPIO_OUT_W1TS_OFFSET   = 0x08  # Set output (1 = HIGH)
GPIO_OUT_W1TC_OFFSET   = 0x0C  # Clear output (1 = LOW)
GPIO_ENABLE_OFFSET     = 0x20  # Output enable

# Functionality register address
GPIO_OUT_REG      = GPIO_BASE_ADDR + GPIO_OUT_OFFSET
GPIO_OUT_W1TS_REG = GPIO_BASE_ADDR + GPIO_OUT_W1TS_OFFSET
GPIO_OUT_W1TC_REG = GPIO_BASE_ADDR + GPIO_OUT_W1TC_OFFSET
GPIO_ENABLE_REG   = GPIO_BASE_ADDR + GPIO_ENABLE_OFFSET

# Choose the GPIO pin
GPIO_NUM = 15
PIN_MASK = 1 << GPIO_NUM #0b1 << GPIO_NUM = 0b1000...00 , numbers of zeros depende on the GPIO Num

# Set GPIO2 as output
mem32[GPIO_ENABLE_REG] |= PIN_MASK

# Blink loop
# while True:
#     print(f"Before ON: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
#     mem32[GPIO_OUT_W1TS_REG] = PIN_MASK  # LED ON
#     print(f"After ON:  GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
#     time.sleep(0.5)
#     print(f"Before OFF: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
#     mem32[GPIO_OUT_W1TC_REG] = PIN_MASK  # LED OFF
#     print(f"After OFF: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
#     time.sleep(0.5)

# print(f"Before ON: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
# mem32[GPIO_OUT_W1TS_REG] = PIN_MASK  # LED ON
# print(f"After ON:  GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
# time.sleep(0.5)
# print(f"Before OFF: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
# mem32[GPIO_OUT_W1TC_REG] = PIN_MASK  # LED OFF
# print(f"After OFF: GPIO_OUT = {bin(mem32[GPIO_OUT_REG])}")
# time.sleep(0.5)