adding image upload example with 2.4" tft

Author: hathach

libraries/Bluefruit52Lib/examples/Peripheral/image_upload/image_upload.ino

@@ -0,0 +1,202 @@
+/*********************************************************************
+ This is an example for our nRF52 based Bluefruit LE modules
+
+ Pick one up today in the adafruit shop!
+
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ MIT license, check LICENSE for more information
+ All text above, and the splash screen below must be included in
+ any redistribution
+*********************************************************************/
+
+/* This sketch demonstrates the "Image Upload" feature of Bluefruit Mobile App.
+ * FeatherWing OLED is used to display uploaded image
+ *  - https://www.adafruit.com/product/3315
+ */
+
+#include <bluefruit.h>
+#include <SPI.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_ILI9341.h>
+
+BLEUart bleuart; // uart over ble
+
+/* The Image Transfer module sends the image of your choice to Bluefruit LE over UART.
+ * Each image sent begins with
+ * - A single byte char “!” (0x21)
+ * - Image width (uint16 little endian, 2 bytes)
+ * - Image height (uint16 little endian, 2 bytes)
+ * - Pixel data encoded as RGB 24-bit and suffixed by a single byte CRC.
+ *
+ * Format: [ ‘!’ ] [ uint16 width ] [ uint16 height ] [ r g b ] [ r g b ] [ r g b ] … [ CRC ]
+ */
+
+uint16_t imageWidth = 0;
+uint16_t imageHeight = 0;
+
+// Statistics for speed testing
+uint32_t rxCount = 0;
+uint32_t rxStartTime = 0;
+uint32_t rxLastTime = 0;
+
+#ifdef ARDUINO_NRF52832_FEATHER
+   #define TFT_DC   11
+   #define TFT_CS   31
+   #define STMPE_CS 30
+   #define SD_CS    27
+#endif
+
+#ifdef ARDUINO_NRF52840_FEATHER
+   #define TFT_DC   10
+   #define TFT_CS   9
+   #define STMPE_CS 6
+   #define SD_CS    5
+#endif
+
+Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
+
+void setup()
+{
+  Serial.begin(115200);
+
+  tft.begin();
+  tft.fillScreen(ILI9341_BLACK);
+  tft.setTextColor(ILI9341_WHITE);
+  tft.setTextSize(1);
+
+  // Config the peripheral connection with maximum bandwidth
+  // more SRAM required by SoftDevice
+  // Note: All config***() function must be called before begin()
+  Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
+
+  Bluefruit.begin();
+  Bluefruit.setTxPower(4);    // Check bluefruit.h for supported values
+  Bluefruit.setName("Bluefruit52");
+  Bluefruit.Periph.setConnectCallback(connect_callback);
+  Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
+  Bluefruit.Periph.setConnInterval(6, 12); // 7.5 - 15 ms
+
+  // Configure and Start BLE Uart Service
+  bleuart.begin();
+  bleuart.setRxCallback(bleuart_rx_callback);
+
+  // Set up and start advertising
+  startAdv();
+
+  // splash screen effect
+  delay(100);
+
+
+  tft.println("Advertising ... ");
+}
+
+void startAdv(void)
+{
+  // Advertising packet
+  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
+  Bluefruit.Advertising.addTxPower();
+  Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_GENERIC_CLOCK);
+
+  // Include bleuart 128-bit uuid
+  Bluefruit.Advertising.addService(bleuart);
+
+  // There is no room for Name in Advertising packet
+  // Use Scan response for Name
+  Bluefruit.ScanResponse.addName();
+  
+  /* Start Advertising
+   * - Enable auto advertising if disconnected
+   * - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
+   * - Timeout for fast mode is 30 seconds
+   * - Start(timeout) with timeout = 0 will advertise forever (until connected)
+   * 
+   * For recommended advertising interval
+   * https://developer.apple.com/library/content/qa/qa1931/_index.html   
+   */
+  Bluefruit.Advertising.restartOnDisconnect(true);
+  Bluefruit.Advertising.setInterval(32, 244);    // in unit of 0.625 ms
+  Bluefruit.Advertising.setFastTimeout(30);      // number of seconds in fast mode
+  Bluefruit.Advertising.start(0);                // 0 = Don't stop advertising after n seconds
+}
+
+void loop()
+{
+  // 3 seconds has passed and there is no data received
+  // then reset rx count
+  if ( (rxCount > 0) && (rxLastTime + 1000 < millis()) )
+  {
+    print_speed(rxCount, rxLastTime-rxStartTime);
+    rxCount = 0;
+  }
+}
+
+void connect_callback(uint16_t conn_handle)
+{
+  BLEConnection* conn = Bluefruit.Connection(conn_handle);
+
+  tft.println("Connected");
+
+  conn->requestPHY();
+  tft.println("Switching PHY");
+
+  conn->requestDataLengthUpdate();
+  tft.println("Updating Data Length");
+
+  conn->requestMtuExchange(247);
+  tft.println("Exchanging MTU");
+
+  tft.println("Ready to receive Image");
+}
+
+void print_speed(uint32_t count, uint32_t ms)
+{
+  Serial.print("Received ");
+  Serial.print(count);
+  Serial.print(" bytes in ");
+  Serial.print(ms / 1000.0F, 2);
+  Serial.println(" seconds.");
+
+  Serial.print("Speed : ");
+  Serial.print( (count / 1000.0F) / (ms / 1000.0F), 2);
+  Serial.println(" KB/s.\r\n");
+}
+
+void bleuart_rx_callback(uint16_t conn_hdl)
+{
+  (void) conn_hdl;
+
+  rxLastTime = millis();
+
+  // first packet
+  if ( rxCount == 0 )
+  {
+    rxStartTime = millis();
+
+    // Incorrect format, possibly corrupted data
+    if ( bleuart.read() != '!' ) bleuart.flush();
+    rxCount++;
+
+    tft.fillScreen(ILI9341_BLACK);
+    tft.setCursor(0, 0);
+  }
+
+  rxCount += bleuart.available();
+  bleuart.flush(); // empty rx fifo
+}
+
+/**
+ * Callback invoked when a connection is dropped
+ * @param conn_handle connection where this event happens
+ * @param reason is a BLE_HCI_STATUS_CODE which can be found in ble_hci.h
+ */
+void disconnect_callback(uint16_t conn_handle, uint8_t reason)
+{
+  (void) reason;
+
+  tft.fillScreen(ILI9341_BLACK);
+  tft.setCursor(0, 0);
+  tft.println("Advertising ...");
+}

libraries/Bluefruit52Lib/examples/Peripheral/throughput/throughput.ino

@@ -110,7 +110,6 @@ void startAdv(void)
 void connect_callback(uint16_t conn_handle)
 {
   BLEConnection* conn = Bluefruit.Connection(conn_handle);
-  (void) conn_handle;
   Serial.println("Connected");
 
   // request PHY changed to 2MB