David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

Diff: RA8875_Touch.cpp

Revision:
88:bfddef6ec836
Parent:
85:022bba13c5c4
Child:
103:7e0464ca6c5c
--- a/RA8875_Touch.cpp	Mon Jan 19 13:32:56 2015 +0000
+++ b/RA8875_Touch.cpp	Mon Jan 19 15:44:41 2015 +0000
@@ -74,13 +74,15 @@
 }
 
 
-RetCode_t RA8875::TouchPanelCalibrate(const char * msg, tpMatrix_t * matrix)
+RetCode_t RA8875::TouchPanelCalibrate(const char * msg, tpMatrix_t * matrix, int maxwait_s)
 {
     point_t pTest[3];
     point_t pSample[3];
     int x,y;
+    Timer timeout;  // timeout guards for not-installed, stuck, user not present...
     
-    while (TouchPanelA2DFiltered(&x, &y))
+    timeout.start();
+    while (TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s)
         wait_ms(20);
     cls();
     if (msg)
@@ -89,12 +91,13 @@
     pTest[0].x = 50;            pTest[0].y = 50;
     pTest[1].x = width() - 50;  pTest[1].y = height()/2;
     pTest[2].x = width()/2;     pTest[2].y = height() - 50;
+
     for (int i=0; i<3; i++) {
         foreground(Blue);
         printf(" (%3d,%3d) => ", pTest[i].x, pTest[i].y);
         line(pTest[i].x-10, pTest[i].y, pTest[i].x+10, pTest[i].y, White);
         line(pTest[i].x, pTest[i].y-10, pTest[i].x, pTest[i].y+10, White);
-        while (!TouchPanelA2DFiltered(&x, &y))
+        while (!TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s)
             wait_ms(20);
         pSample[i].x = x;
         pSample[i].y = y;
@@ -102,11 +105,14 @@
         line(pTest[i].x, pTest[i].y-10, pTest[i].x, pTest[i].y+10, Black);
         foreground(Blue);
         printf(" (%4d,%4d)\r\n", x,y);
-        while (TouchPanelA2DFiltered(&x, &y))
+        while (TouchPanelA2DFiltered(&x, &y) && timeout.read() < maxwait_s)
             wait_ms(20);
         wait(2);
     }
-    return TouchPanelComputeCalibration(pTest, pSample, matrix);
+    if (timeout.read() >= maxwait_s)
+        return touch_cal_timeout;
+    else
+        return TouchPanelComputeCalibration(pTest, pSample, matrix);
 }