// Copyright 2023 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

#include <cstdint>

#include <Arduino.h>
#include <SPI.h>

#include "pw_log/log.h"
#include "pw_string/format.h"

#include "gonk/pin_config.h"

using gonk::pin_config::FlashCS;
using gonk::pin_config::PinConfig;
using gonk::pin_config::StatusLed;

namespace {

PinConfig pin_config = PinConfig();

} // namespace

int main() {
  pin_config.Init();

  // Put FPGA in reset.
  pin_config.InitFpgaPins();
  pin_config.FpgaHalt();
  delay(10);

  pin_config.SPIEnable();

  char buffer[32];
  uint16_t update_count = 0;
  uint8_t manufacturer_id[4];

  while (true) {

    // Read the SPI Flash JEDEC ID.
    manufacturer_id[0] = 0x9f;
    manufacturer_id[1] = 0;
    manufacturer_id[2] = 0;
    manufacturer_id[3] = 0;
    SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
    digitalWrite(FlashCS, LOW);
    SPI.transfer(manufacturer_id, 4);
    digitalWrite(FlashCS, HIGH);
    SPI.endTransaction();

    pw::string::Format(buffer, "SPI Flash JEDEC ID: %x %x %x",
                       manufacturer_id[1], manufacturer_id[2],
                       manufacturer_id[3]);
    PW_LOG_INFO("%s", buffer);
    delay(1000);

    update_count = (update_count + 1) % UINT16_MAX;

    // Toggle status LED each loop.
    if (update_count % 2 == 0) {
      digitalWrite(StatusLed, HIGH);
    } else {
      digitalWrite(StatusLed, LOW);
    }
  }

  return 0;
}