Extended library to include a screensaver
uLCD_Screensaver.cpp
- Committer:
- jdanner3
- Date:
- 2015-03-13
- Revision:
- 0:975087cba076
- Child:
- 1:6b33efd3caee
File content as of revision 0:975087cba076:
/** Screensaver functions for the uLCD_4DGL */ #include "mbed.h" #include "uLCD_4DGL.h" // Determine if the screensaver should be shown void uLCD_4DGL :: checkActiveScreenTime() { time(&now); if (difftime(now, lastDisplayActivityTime) >= max_active_screen_interval) { if (!inScreensaverMode) { enableScreensaverMode(); } else if (inScreensaverHysteresis) { inScreensaverHysteresis = false; } } } // Whenever a change is made to the LCD screen that is not part of the // screensaver graphics method, it is reported and the last screen // activity time is updatd void uLCD_4DGL :: reportScreenInteraction() { time(&lastDisplayActivityTime); // indicate that the screen is still active if (inScreensaverMode) { exitScreensaverMode(); } } // Initialize the screen saver void uLCD_4DGL :: enableScreensaverMode() { inScreensaverMode = true; backupStateOfScreen(); inScreensaverHysteresis = true; cls(); #if MYDEBUG pc.printf("Going into screensaver mode\r\n"); #endif } // Close the screen saver void uLCD_4DGL :: exitScreensaverMode() { inScreensaverMode = false; restoreStateOfScreen(); inScreensaverHysteresis = false; #if MYDEBUG pc.printf("Going out of screensaver mode\r\n"); #endif } // Set the timeout interval for active screen void uLCD_4DGL :: setActiveScreenInterval(int newInterval) { max_active_screen_interval = newInterval; } // Get the timeout interval for active screen int uLCD_4DGL :: getActiveScreenInterval() { return max_active_screen_interval; } // Return whether the LCD is currently in screen saver mode bool uLCD_4DGL :: isInScreensaverMode() { return inScreensaverMode; } // Backup the current pixels of the display to the sd card void uLCD_4DGL :: backupStateOfScreen() { FILE* data = fopen("/sd/pixelData.txt","w"); fclose(data); data = fopen("/sd/pixelData.txt","a"); if (data == NULL) { pc.printf("Data file failed to open!\r\n"); } for (int x = 0; x < 127; x+=2) { for (int y = 0; y < 127; y+=2) { int color = read_pixel(x, y); if (color > 0 && color != 1536 && color != 1538) { fprintf(data, "%i %i %i\n", x, y, color); } } } fclose(data); } // Retrive the backed-up pixel display // from the sd card void uLCD_4DGL :: restoreStateOfScreen() { cls(); const int CHARS = 16; const int TOKENS = 4; const char* const delim = " "; std::ifstream fin; fin.open("/sd/pixelData.txt"); while(!fin.eof()) { // int char int char int \n // 4 + 1 + 4 + 1 + 4 + 1 char buf[CHARS]; fin.getline(buf, CHARS); const char* token[TOKENS] = {}; int i=0; int color; token[0] = strtok(buf, delim); if(token[0]) { for(i=1; i<TOKENS; i++) { token[i] = strtok(0, delim); if(!token[i]) break; color = atoi(token[2]); if (color > 0 && color != 1536 && color != 1538) { int red5 = (color >> 11) & 0x1F; int green6 = (color >> 5) & 0x1F; int blue5 = (color >> 0) & 0x1F; color = 0; color |= blue5 << 0 + 3; color |= green6 << 2 + 8; color |= red5 << 16 + 3; pixel(atoi(token[0]), atoi(token[1]), color); } else { pixel(atoi(token[0]), atoi(token[1]), 0); } } } } fin.close(); }