Diff: modifs.h

Revision:

2:d0acbd263ec7

Child:

3:fb4d62b5ffb3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modifs.h	Thu Jan 03 10:54:09 2013 +0000
@@ -0,0 +1,82 @@
+/*
+Date   : 31.12.12
+Author : Erik Olieman
+---------------------
+Code readability and speed
+1. created separate structure for mini-DK (base for library)
+2. Removed wr_dat_only routine (uses 8 bit transfer = slow)
+   Replaced each wr_dat_only with
+     _spi.format(16,3);
+     .....
+     _spi.write(...);
+     .....
+     _spi.format(8,3);
+3. Creation of Mini-DK.h with all declarations specific to the mini-DK board.
+
+
+Date   : 31.12.12
+Author : Frank Vannieuwkerke
+----------------------------
+      NOTE : Current code contains SPI_TFT *LCD; in Touch.h
+             TouchPanel_Calibrate, TP_DrawPoint and DrawCross in Touch.cpp use LCD->...
+             These are currently commented out since using them locks up the system although
+             the compiler does not show any errors. Current code works but the calibration
+             crosshairs do not show - touching their approximate position still allows you to
+             calibrate and draw (TP.TP_DrawPoint in main.cpp temporarily replaced with TFT.rect).
+             
+             ??Other solution : see TODOs below??
+                Possible advantage of this solution :
+                    Touch library fully independent of LCD library.
+                    Perhaps do Calibration with a printed template when LCD is not used (less accurate).
+                    This would only be useful when a touchpanel without LCD is used.
+             
+
+      Removed reset pin from SPI_TFT (not needed - pin is connected to main reset).
+
+      Separated SPI_TFT from TouchADS7843
+      
+      In main.cpp
+      ----------- 
+      TODO: before TP.TouchPanel_Calibrate()
+                cls
+                draw 3 crosses with numbers according to DisplaySample in touch.cpp
+                Use following text : Calibration - Touch each crosshair in the numbered sequence.
+            after TP.TouchPanel_Calibrate()
+                cls
+
+      Moved following global touch var declarations (at top of main.cpp) to touch.cpp/.h
+        Matrix      matrix;
+        Coordinate  display;
+        Coordinate  screen;
+        NOTE : i did not create a class with var readback, just used plain C notation.
+               These vars can be accessed from other code through <classname>.<varname>
+               example : TP.display.x
+               Only drawback : Each element of these vars needs to be initialised separately.
+                               (initialisation of these vars is not possible with array notation).
+
+      In Touch.cpp/.h
+      ---------------
+      Removed TP_Init - moved TP_init code to constructor.
+
+      TODO : Avoid using TFT_LCD library : remove all references to LCD driving
+                                           remove Drawpoint and Drawcross
+                                           remove #include Arial12x12
+
+      Variables in call to TouchPanel_Calibrate, Read_Ads7846, getDisplayPoint are no longer needed.
+      Modified these routines accordingly in touch.cpp/.h (pointers no longer needed)
+      *** TouchPanel_Calibrate and getDisplayPoint already modified.
+
+      TODO: Problem with Read_Ads7846 -> is also called in TouchPanel_Calibrate (Touch.cpp) with other var. 
+            Solution : in TouchPanel_Calibrate, change screen_cal to screen_tmp and copy (TP.)screen to this
+                       variable. Put screen_tmp back to (TP.)screen after setCalibrationMatrix.
+
+
+
+General notes
+-------------
+lpc1768 SPI port - problem with using SD and TFT simultaneously
+see note http://mbed.org/comments/cr/83/2654/#c4768
+google search : lpc1768 ssp ssp0 ssp1
+perhaps use softspi (eg http://arduino.cc/forum/index.php?topic=117356.0)
+Ignore above notes - use Erik Olieman's solution. 
+*/
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