Diff: MjSingleDigitDisplayTZ250A.cpp

Revision:

0:edeb3c119e51

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MjSingleDigitDisplayTZ250A.cpp	Wed Feb 24 13:24:28 2016 +0000
@@ -0,0 +1,61 @@
+/* Copyright (c) 2016 Takashi Matsuoka, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "MjSingleDigitDisplayTZ250A.h"
+
+MjSingleDigitDisplayTZ250A::MjSingleDigitDisplayTZ250A(BusOut* data, DigitalOut* reset, DigitalOut* strobe)
+    : MjSingleDigitDisplay(), _Data(data), _Reset(reset), _Strobe(strobe)
+{
+    _Data->write(0);
+    _Reset->write(0);
+    _Strobe->write(0);
+}
+
+void MjSingleDigitDisplayTZ250A::reset()
+{
+    _Reset->write(1);
+    wait_ms(10);
+    _Reset->write(0);
+    wait_ms(600);
+}
+
+void MjSingleDigitDisplayTZ250A::writeHalf(uint8_t value)
+{
+    _Data->write(value);
+
+    _Strobe->write(1);
+    wait_ms(14);    // Tdly + Tbw
+
+    _Strobe->write(0);
+    wait_ms(1);     // Tsl
+}
+
+void MjSingleDigitDisplayTZ250A::write(uint8_t value)
+{
+    if (value < 36)
+    {
+        value = (value << 1 & 0x70 | 0x80) | (value & 0x07);
+    }
+    else if (value == 255)
+    {
+        value = 0xc4;   // Blank.
+    }
+
+    writeHalf(value & 0x0f);
+    writeHalf(value >> 4);
+}