From 8da14bb29ef8f8a969f9615a64409ba5a98ac442 Mon Sep 17 00:00:00 2001
From: Nick Van Doorn <vandoorn.nick@gmail.com>
Date: Thu, 2 Nov 2017 13:31:10 -0700
Subject: Initial commit

---
 camera.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 camera.c

(limited to 'camera.c')

diff --git a/camera.c b/camera.c
new file mode 100644
index 0000000..1721522
--- /dev/null
+++ b/camera.c
@@ -0,0 +1,133 @@
+#include "legato.h"
+#include "interfaces.h"
+#include "camera.h"
+#include <time.h>
+
+
+COMPONENT_INIT {
+  Camera cam = {
+    .fd = openCameraFd(),
+    .serialNum = 0x0,
+    .bufferLen = 0,
+    .frameptr = 0
+  };
+  bool success = takePicture(&cam);
+  LE_INFO("Number of bytes in buffer: %d", NUM_ARRAY_MEMBERS(cam.buff));
+  LE_INFO("Did it work: %d", success);
+}
+
+// Used to wait for the serial port
+void delay (unsigned int msecs) {
+  unsigned int secs = msecs / 1000;
+  unsigned int retTime = time(0) + secs;
+  while (time(0) < retTime);
+}
+
+// Returns a file descriptor that can be used to
+// talk to the camera
+int openCameraFd () {
+  int fd = le_tty_Open(SERIAL_PATH, O_RDWR);
+  le_tty_SetBaudRate(fd, CAM_BAUD_RATE);
+  return fd;
+}
+
+// Send a command to the camera serial port
+void sendCommand (Camera *cam, byte cmd, byte args[]) {
+  uint8_t init = VC0706_PREFIX;
+  write(cam->fd, &init, 1); // send the cmd prefix
+  write(cam->fd, &(cam->serialNum), 1); // send the serial number
+  write(cam->fd, &cmd, 1); // send the cmd
+  for(int i = 0; i < NUM_ARRAY_MEMBERS(args); i++) { // send each arg
+    write(cam->fd, &args[i], 1);
+  }
+}
+
+// Run a command
+bool runCommand (Camera *cam, byte cmd, byte args[], int respLen) {
+  sendCommand(cam, cmd, args);
+  if (readResponse(cam, respLen, TIMEOUT) != respLen)
+    return false;
+  if (verifyResponse(cam, cmd))
+    return false;
+  else return true;
+}
+
+// Reads from the camera and returns how many bytes it read
+int readResponse (Camera *cam, int nBytes, int timeout) {
+  int counter = 0;
+  int bufferLen = 0;
+  // read while below timeout and while the buffer
+  // is still smaller than expected
+  while(timeout >= counter && cam->bufferLen <= nBytes) {
+    ssize_t bytesRead = read(cam->fd, &(cam->buff) + cam->bufferLen, 1); // read one byte at a time
+    bufferLen++;
+    // bytesRead will be 0 or -1 if no data was received
+    if (bytesRead <= 0) {
+      delay(1);
+      counter++;
+      continue;
+    }
+    counter = 0;
+  }
+  return cam->bufferLen;
+}
+
+bool verifyResponse (Camera *cam, byte cmd) {
+  // If any of these are not equal than
+  // the command failed
+  return
+    !(cam->buff[0] != VC0706_RESP_PREFIX ||
+    cam->buff[1] != cam->serialNum ||
+    cam->buff[2] != cmd ||
+    cam->buff[3] != 0x0);
+}
+
+bool cameraFrameBuffCtrl (Camera *cam, byte cmd) {
+  byte args[] = { 0x1, cmd };
+  return runCommand(cam, cmd, args, 5);
+}
+
+bool takePicture (Camera *cam) {
+  return cameraFrameBuffCtrl(cam, VC0706_STOPCURRENTFRAME);
+}
+
+bool reset (Camera *cam) {
+  byte args[] = { 0x0 };
+  return runCommand(cam, VC0706_RESET, args, 5);
+}
+
+size_t bufferToFile (Camera *cam, char *path) {
+  FILE *photo = fopen(path, "w");
+  if (photo != NULL) {
+    LE_INFO("File pointer for %s is valid", path);
+    size_t bytesWritten = fwrite(&(cam->buff), sizeof(cam->buff[0]), cam->bufferLen, photo);
+    fclose(photo);
+    return bytesWritten;
+  }
+  else {
+    LE_INFO("File pointer for %s is invalid", path);
+    return -1;
+  }
+}
+
+// TODO implement these
+bool TVon (Camera *cam);
+bool TVOff (Camera *cam);
+byte *readPicture (Camera *cam);
+bool resumeVideo (Camera *cam);
+uint32_t frameLength (Camera *cam);
+char *getVersion (Camera *cam);
+uint8_t available();
+uint8_t getDownsize(void);
+bool setDownsize(uint8_t);
+int getImageSize (Camera *cam);
+bool setImageSize (Camera *cam, int size);
+bool getMotionDetect (Camera *cam);
+byte getMotionStatus(Camera *cam, byte x);
+bool motionDetected (Camera *cam);
+bool setMotionDetect (bool flag);
+bool setMotionStatus (byte x, byte d1, byte d2);
+byte getCompression (Camera *cam);
+bool setCompression(Camera *cam, byte c);
+bool getPTZ(Camera *cam, uint16_t *w, uint16_t *h, uint16_t *wz, uint16_t *hz, uint16_t *pan, uint16_t *tilt);
+bool setPTZ(Camera *cam, uint16_t wz, uint16_t hz, uint16_t pan, uint16_t tilt);
-- 
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