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.cpp

Revision:
71:dcac8efd842d
Parent:
68:ab08efabfc88
Child:
72:ecffe56af969
--- a/RA8875.cpp	Sun Aug 31 15:58:15 2014 +0000
+++ b/RA8875.cpp	Sat Oct 04 17:45:50 2014 +0000
@@ -238,6 +238,52 @@
 }
 // #### end of touch panel code additions
 
+
+RetCode_t RA8875::KeypadInit(bool scanEnable, bool longDetect, uint8_t sampleTime, uint8_t scanFrequency, 
+    uint8_t longTimeAdjustment, bool interruptEnable, bool wakeupEnable)
+{
+    uint8_t value = 0;
+    
+    if (sampleTime > 3 || scanFrequency > 7 || longTimeAdjustment  > 3)
+        return bad_parameter;
+    value |= (scanEnable) ? 0x80 : 0x00;
+    value |= (longDetect) ? 0x40 : 0x00;
+    value |= (sampleTime & 0x03) << 4;
+    value |= (scanFrequency & 0x07);
+    WriteCommand(0xC0, value);   // Enable Key Scan (and ignore possibility of an error)
+    
+    value = 0;
+    value |= (wakeupEnable) ? 0x80 : 0x00;
+    value |= (longTimeAdjustment & 0x03) << 2;
+    WriteCommand(0xC1, value);  // (and ignore possibility of an error)
+    
+    value = ReadCommand(0xF0);  // (and ignore possibility of an error)
+    value &= ~0x10;
+    value |= (interruptEnable) ? 0x10 : 0x00;
+    return WriteCommand(0xF0, value);
+}
+
+bool RA8875::_kbhit(void)
+{
+    return (ReadCommand(0xF1) & 0x10);  // check KS status - true if kbhit
+}
+
+uint8_t RA8875::_getch(void)
+{
+    while (!_kbhit()) {
+        wait_us(POLLWAITuSec);
+        COUNTIDLETIME(POLLWAITuSec);
+    }
+
+    // read the key press number
+    uint8_t keyNumReg = ReadCommand(0xC1) & 0x03;
+    // read the key code
+    uint8_t keyCode = ReadCommand(0xC2 + keyNumReg);
+    // Clear KS status
+    WriteCommand(0xF1, 0x10);
+    return keyCode;
+}
+
 #ifdef PERF_METRICS
 void RA8875::ClearPerformance()
 {