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_GSL1680.cpp

Revision:
168:37a0c4d8791c
Parent:
166:53fd4a876dac
Child:
170:7e26d51bc48b
--- a/RA8875_Touch_GSL1680.cpp	Tue Feb 26 19:52:57 2019 +0000
+++ b/RA8875_Touch_GSL1680.cpp	Fri Mar 01 19:27:49 2019 +0000
@@ -69,6 +69,42 @@
 #include "RA8875.h"
 #include "RA8875_Touch_GSL1680_Firmware.h"
 
+#define DEBUG "RAGL"
+// ...
+// INFO("Stuff to show %d", var); // new-line is automatically appended
+//
+#if (defined(DEBUG) && !defined(TARGET_LPC11U24))
+#define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define ERR(x, ...)  std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+static void HexDump(const char * title, const uint8_t * p, int count)
+{
+    int i;
+    char buf[100] = "0000: ";
+
+    if (*title)
+        INFO("%s", title);
+    for (i=0; i<count; ) {
+        sprintf(buf + strlen(buf), "%02X ", *(p+i));
+        if ((++i & 0x0F) == 0x00) {
+            INFO("%s", buf);
+            if (i < count)
+                sprintf(buf, "%04X: ", i);
+            else
+                buf[0] = '\0';
+        }
+    }
+    if (strlen(buf))
+        INFO("%s", buf);
+}
+#else
+#define INFO(x, ...)
+#define WARN(x, ...)
+#define ERR(x, ...)
+#define HexDump(a, b, c)
+#endif
+
+
 #if 0
 // Translate from GSL1680 Event Flag to Touch Code to API-match the
 // alternate resistive touch screen driver common in the RA8875
@@ -88,6 +124,7 @@
     unsigned int source_len;
     const struct fw_data *ptr_fw;
 
+    INFO("GSL1680_Init()");
     // Wake it
     m_wake->write(false);
     wait_ms(20);
@@ -139,6 +176,7 @@
         {
             buf[0] = 0xf0;
             buf[1] = (uint8_t)(ptr_fw[source_line].val & 0x000000ff);
+            INFO("GSL1680 Firmware set page: %02X", buf[1]);
             m_i2c->write(m_addr, (char *)buf, 2);
         }
         else 
@@ -148,6 +186,7 @@
             buf[2] = (uint8_t)((ptr_fw[source_line].val & 0x0000ff00) >> 8);
             buf[3] = (uint8_t)((ptr_fw[source_line].val & 0x00ff0000) >> 16);
             buf[4] = (uint8_t)((ptr_fw[source_line].val & 0xff000000) >> 24);
+            //INFO("GSL1680 Firmware write[%02X] = %08X", ptr_fw[source_line].offset, ptr_fw[source_line].val);
             m_i2c->write(m_addr, (char *)buf, 5);
         }
     }
@@ -198,6 +237,7 @@
         numberOfTouchPoints = touch_data[0];
         gesture = FT5206_GEST_ID_NO_GESTURE;    // no gesture support
 
+        INFO("GSL1680 Touch %d points", numberOfTouchPoints);
         int tNdx = GSL1680_TOUCH_POINTS - 1;
         int dNdx = TD_SPACE - 1;
         for ( ; tNdx >= 0; tNdx--, dNdx -= 4) {
@@ -206,7 +246,10 @@
             touchInfo[tNdx].coordinates.y = fingerAndY & 0x0FFF;
             touchInfo[tNdx].coordinates.x = AndX & 0x0FFFF;
             touchInfo[tNdx].touchID = (fingerAndY >> 12);
-            touchInfo[tNdx].touchCode = (numberOfTouchPoints > tNdx) ? touch : no_touch;            
+            touchInfo[tNdx].touchCode = (numberOfTouchPoints > tNdx) ? touch : no_touch;
+            //INFO("  Code %d, Finger %d, xy (%4d,%4d)",
+            //    touchInfo[tNdx].touchCode, touchInfo[tNdx].touchID,
+            //    touchInfo[tNdx].coordinates.x, touchInfo[tNdx].coordinates.y);
         }
     } else {
         numberOfTouchPoints = 0;