FlexBook / Mbed 2 deprecated FlexBook171204a

Added HangmanGame class, but does not work yet

Dependencies:   SDFileSystem app epson mbed msp430 pl tests

Diff: mcp23s17.cpp

Revision:
0:fa7450a43b99
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mcp23s17.cpp	Mon Dec 04 09:32:20 2017 +0000
@@ -0,0 +1,38 @@
+//
+// Filename: mcp23s17.cpp
+//
+// Flexbook Hardware Abstraction Layer.
+//
+
+#include "mcp23s17.h"
+
+namespace HAL {
+
+MCP23S17::MCP23S17(int addressin, SPI &spiin, DigitalOut &csin)
+: address(addressin), spi(spiin), cs(csin)
+{
+    spi.format(8, 1);
+}
+
+int MCP23S17::Read(REG_MCP23S17 reg)
+{
+    cs = 0;
+    spi.write(address | 0x41);
+    spi.write(reg);
+    int data = spi.write(0x00); // Write dummy value to read.
+    cs = 1;
+    
+    return data;
+}
+
+void MCP23S17::Write(REG_MCP23S17 reg, int value)
+{
+    cs = 0;
+    spi.write(address | 0x40);
+    spi.write(reg);
+    spi.write(value);
+    cs = 1;
+}
+
+} // End HAL namespace.
+