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:
182:8832d03a2a29
Parent:
171:f92c0f1f6db4
Child:
193:74f80834d59d
--- a/RA8875_Touch_GSL1680.cpp	Fri Aug 02 02:12:26 2019 +0000
+++ b/RA8875_Touch_GSL1680.cpp	Sat Aug 03 00:26:33 2019 +0000
@@ -6,14 +6,14 @@
 /// after power-up, the program must be installed into the chip. This is done through
 /// the I2C interface. 
 ///
-/// @caution To make it a bit more complicated, I cannot find any source
+/// @attention To make it a bit more complicated, I cannot find any source
 ///     for this micro, only "bytestream", which one has to hope is defect free.
 /// 
-/// @caution To make it even more complicated, I do not have a display with this
+/// @attention To make it even more complicated, I do not have a display with this
 ///     controller in it, so this body of work is the collective merge of what I've
 ///     found and interpreted and interface converted to align with this library.
 ///
-/// @caution It is probably clear that this represents a work in process, and is 
+/// @attention It is probably clear that this represents a work in process, and is 
 ///     an attempt to make a working driver.
 ///
 /// http://linux-sunxi.org/GSL1680 has some useful information, a bit of which
@@ -214,8 +214,6 @@
 
 
 uint8_t RA8875::GSL1680_TouchPositions(void) {
-    uint16_t fingerAndY, AndX;
-
     // [80] = # touch points
     // [81]       not used
     // [82]       not used
@@ -241,6 +239,7 @@
         int tNdx = GSL1680_TOUCH_POINTS - 1;
         int dNdx = TD_SPACE - 1;
         for ( ; tNdx >= 0; tNdx--, dNdx -= 4) {
+            uint16_t fingerAndY, AndX;
             fingerAndY = (uint16_t)(touch_data[dNdx-0])<<8 | (uint16_t)touch_data[dNdx-1];
             AndX = (uint16_t)(touch_data[dNdx-2])<<8 | (uint16_t)touch_data[dNdx-3];
             touchInfo[tNdx].coordinates.y = fingerAndY & 0x0FFF;