# Blank project

This is a blank Wokwi project. Please edit this README file and add a description of your project.

## Usage

1. Add parts by clicking the blue "+" button in the diagram editor
2. Connect parts by dragging wires between them
3. Click the green play button to start the simulation


README.md

diagram.json

bad-display

bad-display.chip.json

// Wokwi Custom Chip - For docs and examples see:
// https://docs.wokwi.com/chips-api/getting-started
//
// SPDX-License-Identifier: MIT
// Copyright 2023 larry parry

#include "wokwi-api.h"
#include <stdio.h>
#include <stdlib.h>

typedef struct {
  // TODO: Put your chip variables here
  i2c_dev_t i2c1;
} chip_state_t;

bool on_i2c_connect(void *user_data, uint32_t address, bool read) {
  // `address` parameter contains the 7-bit address that was received on the I2C bus.
  // `read` indicates whether this is a read request (true) or write request (false).
  return true; // true means ACK, false NACK
}

uint8_t on_i2c_read(void *user_data) {
  return 0; // The byte to be returned to the microcontroller
}

bool on_i2c_write(void *user_data, uint8_t data) {
  // `data` is the byte received from the microcontroller
  return true; // true means ACK, false NACK
}

void on_i2c_disconnect(void *user_data) {
  // This method is optional. Useful if you need to know when the I2C transaction has concluded.
}

void chip_init() {
  chip_state_t *chip = malloc(sizeof(chip_state_t));

   const i2c_config_t i2c1 = {
    .address = 0x22,
    .scl = pin_init("SCL", INPUT_PULLUP),
    .sda = pin_init("SDA", INPUT_PULLUP),
    .connect = on_i2c_connect,
    .read = on_i2c_read,
    .write = on_i2c_write,
    .disconnect = on_i2c_disconnect,
    .user_data = chip,
  };
  chip->i2c1 = i2c_init(&i2c1);

  // TODO: Initialize the chip, set up IO pins, create timers, etc.

  printf("Hello from custom chip!\n");
}
