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/*
*
* Copyright (c) 2020 Project CHIP Authors
* Copyright (c) 2018 Nest Labs, Inc.
* All rights reserved.
*
* 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
*
* http://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 "esp_log.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "qrcodegen.h"
#include <platform/CHIPDeviceLayer.h>
#include <setup_payload/QRCodeSetupPayloadGenerator.h>
#include <support/CodeUtils.h>
#include "Display.h"
#include "QRCodeWidget.h"
#define MAX_SSID_LEN 32
#if CONFIG_HAVE_DISPLAY
extern const char * TAG;
const char * const QRCODE_DATA = "https://github.com/project-chip/connectedhomeip";
using namespace ::chip;
using namespace ::chip::DeviceLayer;
// QRCode config
enum
{
kQRCodeVersion = 4,
kQRCodeModuleSizePix = 4,
kQRCodePadding = 2
};
// TODO Pull this from the configuration manager
void GetAPName(char * ssid, size_t ssid_len)
{
uint8_t mac[6];
CHIP_ERROR err = esp_wifi_get_mac(ESP_IF_WIFI_STA, mac);
if (err != ESP_OK)
{
ESP_LOGE(TAG, "esp_wifi_get_mac(ESP_IF_WIFI_STA) failed: %s", chip::ErrorStr(err));
}
snprintf(ssid, ssid_len, "%s%02X%02X", "CHIP_DEMO-", mac[4], mac[5]);
}
string createSetupPayload()
{
char ap_ssid[MAX_SSID_LEN];
GetAPName(ap_ssid, sizeof(ap_ssid));
SetupPayload payload;
payload.version = 1;
payload.vendorID = 2;
payload.productID = 3;
uint64_t tag;
VendorTag(2, tag);
OptionalQRCodeInfo stringInfo;
stringInfo.tag = tag;
stringInfo.type = optionalQRCodeInfoTypeString;
stringInfo.data = ap_ssid;
payload.addOptionalData(stringInfo);
QRCodeSetupPayloadGenerator generator(payload);
string result;
uint8_t tlvDataStart[sizeof(ap_ssid)];
CHIP_ERROR err = generator.payloadBase41Representation(result, tlvDataStart, sizeof(tlvDataStart));
if (err != CHIP_NO_ERROR)
{
ESP_LOGE(TAG, "Couldn't get payload string %d", generator.payloadBase41Representation(result));
}
return result;
};
void QRCodeWidget::Init()
{
QRCodeColor = TFT_DARKGREY;
VMargin = 10;
}
void QRCodeWidget::Display()
{
CHIP_ERROR err = CHIP_NO_ERROR;
enum
{
kMaxQRCodeStrLength = 120
};
char * qrCodeStr = NULL;
uint8_t * qrCodeDataBuf = NULL;
uint8_t * qrCode = NULL;
uint16_t qrCodeDisplaySize, qrCodeX, qrCodeY, qrCodeXOffset, qrCodeYOffset;
qrCodeStr = (char *) createSetupPayload().c_str();
// Generate the QR code.
uint16_t qrCodeSize = qrcodegen_BUFFER_LEN_FOR_VERSION(kQRCodeVersion);
qrCodeDataBuf = (uint8_t *) malloc(qrCodeSize);
qrCode = (uint8_t *) malloc(qrCodeSize);
VerifyOrExit(qrCodeDataBuf != NULL, err = CHIP_ERROR_NO_MEMORY);
if (!qrcodegen_encodeText(qrCodeStr, qrCodeDataBuf, qrCode, qrcodegen_Ecc_LOW, kQRCodeVersion, kQRCodeVersion,
qrcodegen_Mask_AUTO, true))
{
ESP_LOGE(TAG, "qrcodegen_encodeText() failed");
ExitNow(err = CHIP_ERROR_INCORRECT_STATE);
}
// Draw the QR code image on the screen.
qrCodeDisplaySize = (qrcodegen_getSize(qrCode) + kQRCodePadding) * kQRCodeModuleSizePix;
qrCodeX = (DisplayWidth - qrCodeDisplaySize) / 2;
qrCodeY = (DisplayHeight * VMargin) / 100;
qrCodeXOffset = qrCodeX + kQRCodeModuleSizePix;
qrCodeYOffset = qrCodeY + kQRCodeModuleSizePix;
TFT_fillRect(qrCodeX, qrCodeY, (int) qrCodeDisplaySize, (int) qrCodeDisplaySize, QRCodeColor);
for (uint8_t y = 0; y < qrcodegen_getSize(qrCode); y++)
{
for (uint8_t x = 0; x < qrcodegen_getSize(qrCode); x++)
{
if (qrcodegen_getModule(qrCode, x, y))
{
TFT_fillRect(x * kQRCodeModuleSizePix + qrCodeXOffset, y * kQRCodeModuleSizePix + qrCodeYOffset,
(int) kQRCodeModuleSizePix, (int) kQRCodeModuleSizePix, TFT_BLACK);
}
}
}
exit:
if (qrCode != NULL)
{
free(qrCode);
}
if (qrCodeDataBuf != NULL)
{
free(qrCodeDataBuf);
}
if (err != CHIP_NO_ERROR)
{
ESP_LOGE(TAG, "QRCodeWidget::Display() failed: %s", ErrorStr(err));
}
}
#endif // CONFIG_HAVE_DISPLAY