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)

Files at this revision

API Documentation at this revision

Revision 176:4ab96d33a8ec, committed 2019-03-24

Comitter:
WiredHome
Date:
Sun Mar 24 14:49:49 2019 +0000
Parent:
175:7be3a1fb7fc2
Child:
177:d8e65c0e268a
Commit message:
Correct a defect recently introduced, where the resistive touch screen failed to have memory allocated to hold the touch information.

Changed in this revision

RA8875.cpp Show annotated file Show diff for this revision Revisions of this file
RA8875_Regs.h Show annotated file Show diff for this revision Revisions of this file
RA8875_Touch.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/RA8875.cpp	Fri Mar 15 01:39:39 2019 +0000
+++ b/RA8875.cpp	Sun Mar 24 14:49:49 2019 +0000
@@ -192,8 +192,11 @@
     , cs(csel)
     , res(reset)
 {
-    useTouchPanel = TP_NONE;
-    touchInfo = NULL;
+    touchInfo = (touchInfo_T *)malloc(RESISTIVE_TOUCH_POINTS * sizeof(touchInfo_T));
+    if (touchInfo)
+        useTouchPanel = TP_RES;
+    else
+        useTouchPanel = TP_NONE;    // unfortnately a silent failure, but unlikely
     tpFQFN = NULL;
     tpCalMessage = NULL;
     m_irq = NULL;

--- a/RA8875_Regs.h	Fri Mar 15 01:39:39 2019 +0000
+++ b/RA8875_Regs.h	Sun Mar 24 14:49:49 2019 +0000
@@ -6,7 +6,8 @@
 #define RA8875_REGS_H
 
     // Touch Panel public macros
-    
+    #define RESISTIVE_TOUCH_POINTS 1
+        
     /* Touch Panel Enable/Disable Reg TPCR0[7] */
     #define TP_ENABLE   ((uint8_t)(1<<7))
     #define TP_DISABLE  ((uint8_t)(0<<7))

--- a/RA8875_Touch.cpp	Fri Mar 15 01:39:39 2019 +0000
+++ b/RA8875_Touch.cpp	Sun Mar 24 14:49:49 2019 +0000
@@ -134,11 +134,11 @@
 int RA8875::TouchChannels(void)
 {
     if (useTouchPanel == TP_GSL1680) {
-        return GSL1680_TOUCH_POINTS;  // based on TP_GSL1680 firmware
+        return GSL1680_TOUCH_POINTS;    // based on TP_GSL1680 firmware
     } else if (useTouchPanel == TP_FT5206) {
-        return 5;   // based on the FT5206 hardware
+        return FT5206_TOUCH_POINTS;     // based on the FT5206 hardware
     } else if (useTouchPanel == TP_RES) {
-        return 1;   // based on the RA8875 resistive touch driver
+        return RESISTIVE_TOUCH_POINTS;  // based on the RA8875 resistive touch driver
     } else {
         return 0;   // it isn't enabled, so there are none.
     }