Add test pattern generation for Portenta camera

Author: facchinm

libraries/Himax_HM01B0/himax.cpp

@@ -300,6 +300,15 @@ static void HIMAX_GrayScale(uint8_t value)
     HIMAX_RegWrite(BLC2_TGT, value);
 }
 
+void HIMAX_TestPattern(bool enable, bool walking)
+{
+    uint8_t reg = 0;
+    if (enable) {
+        reg = 1 | (walking ? (1 << 4) : 0);
+    }
+    HIMAX_RegWrite(0x0601,  reg );
+}
+
 static void HIMAX_FrameRate()
 {
     HIMAX_RegWrite( FRAME_LEN_LINES_H, 0x02);

libraries/Himax_HM01B0/himax.h

@@ -145,6 +145,7 @@ typedef struct regval_list_ {
 
 uint8_t HIMAX_Open(void);
 void HIMAX_Mode(uint8_t mode);
+void HIMAX_TestPattern(bool enable = true, bool walking = true);
 
 
 #ifdef __cplusplus

libraries/Portenta_Camera/camera.cpp

@@ -588,5 +588,8 @@ uint8_t* CameraClass::snapshot(void)
   return (uint8_t *)LCD_FRAME_BUFFER;
 }
 
-
+void CameraClass::testPattern(bool walking)
+{
+  HIMAX_TestPattern(true, walking);
+}
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

libraries/Portenta_Camera/camera.h

@@ -4,4 +4,5 @@ class CameraClass {
 	uint8_t* snapshot();
 	int start(void);
 	uint8_t* grab(void);
+	void testPattern(bool walking);
 };

libraries/Portenta_Camera/examples/Envie_camera/Envie_camera.ino

@@ -5,14 +5,17 @@ CameraClass cam;
 void setup() {
 
   Serial.begin(115200);
-  while (!Serial);
+  //while (!Serial);
 
   // put your setup code here, to run once:
   cam.begin(324, 244);
   cam.start();
+  //cam.testPattern(true);
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
-  Serial.write(cam.grab(), 324*244);
-}
+  if (Serial) {
+    Serial.write(cam.grab(), 324 * 244);
+  }
+}

libraries/Portenta_Camera/extras/CameraRawBytesVisualizer/CameraRawBytesVisualizer.pde

@@ -0,0 +1,67 @@
+/*
+  This sketch reads a raw Stream of RGB565 pixels
+  from the Serial port and displays the frame on
+  the window.
+  Use with the Examples -> CameraCaptureRawBytes Arduino sketch.
+  This example code is in the public domain.
+*/
+
+import processing.serial.*;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+Serial myPort;
+
+// must match resolution used in the sketch
+final int cameraWidth = 324;
+final int cameraHeight = 244;
+final int cameraBytesPerPixel = 1;
+final int bytesPerFrame = cameraWidth * cameraHeight * cameraBytesPerPixel;
+
+PImage myImage;
+byte[] frameBuffer = new byte[bytesPerFrame];
+
+void setup()
+{
+  size(324, 244);
+
+  // if you have only ONE serial port active
+  //myPort = new Serial(this, Serial.list()[0], 9600);          // if you have only ONE serial port active
+
+  // if you know the serial port name
+  //myPort = new Serial(this, "COM5", 9600);                    // Windows
+  myPort = new Serial(this, "/dev/ttyACM0", 9600);            // Linux
+  //myPort = new Serial(this, "/dev/cu.usbmodem14401", 9600);     // Mac
+
+  // wait for full frame of bytes
+  myPort.buffer(bytesPerFrame);  
+
+  myImage = createImage(cameraWidth, cameraHeight, ALPHA);
+}
+
+void draw()
+{
+  image(myImage, 0, 0);
+}
+
+void serialEvent(Serial myPort) {
+  // read the saw bytes in
+  myPort.readBytes(frameBuffer);
+
+  // access raw bytes via byte buffer
+  ByteBuffer bb = ByteBuffer.wrap(frameBuffer);
+  bb.order(ByteOrder.BIG_ENDIAN);
+
+  int i = 0;
+
+  while (bb.hasRemaining()) {
+    // read 16-bit pixel
+    byte p = bb.get();
+
+
+    // set pixel color
+    myImage .pixels[i++] = color(Byte.toUnsignedInt(p));
+  }
+ myImage.updatePixels();
+
+}