Diff: iface.c

Revision:

0:64cb39e64128

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/iface.c	Tue Dec 06 22:31:21 2011 +0000
@@ -0,0 +1,88 @@
+#include "mbed.h"
+#include "iface.h"
+#include "memory.h"
+
+Timeout timer;
+char keydown = 0;
+
+extern I2C io;
+extern int channelPointer;
+extern char* channelData;
+extern int waddr;
+extern int raddr;
+
+void nextChannel() {
+    if (channelPointer < (CHANNELCOUNT - 1)) channelPointer++;
+}
+void previousChannel() {
+    if (channelPointer > 0) channelPointer--;
+}
+void incrementValue() {
+    if (channelData[channelPointer] < 255) channelData[channelPointer]++;
+}
+void decrementValue() {
+    if (channelData[channelPointer] > 0) channelData[channelPointer]--;
+}
+void homeChannel() {
+    channelPointer = 0;
+}
+void zeroValue() {
+    channelData[channelPointer] = 0;
+}
+void maxValue() {
+    channelData[channelPointer] = 255;
+}
+
+void handle(char key) {
+    switch(key) {
+        case 0x11:
+            homeChannel();
+            break;
+        case 0x42:
+            nextChannel();
+            break;
+        case 0x12:
+            previousChannel();
+            break;
+        case 0x21:
+            incrementValue();
+            break;
+        case 0x24:
+            decrementValue();
+            break;
+        case 0x48:
+            maxValue();
+            break;
+        case 0x18:
+            zeroValue();
+            break;
+        case 0x14:
+            saveMemory();
+            break;
+        case 0x44:
+            loadMemory();
+            break;
+    }
+}
+
+void keyhandle() {
+    if(keydown) {
+        handle(keydown);
+        timer.attach_us(&keyhandle, 20000);
+    }
+}
+
+void keypress() {
+    char byte0f, bytef0;
+    io.read(raddr, &byte0f, 1);
+    bytef0 = 0xF0;
+    io.write(waddr, &bytef0, 1);
+    io.read(raddr, &bytef0, 1);
+    keydown = ~(byte0f | bytef0);
+    if(keydown) {
+        handle(keydown);
+        if((keydown != 0x14) && (keydown != 0x44)) timer.attach_us(&keyhandle, 500000);
+    }
+    byte0f = 0x0F;
+    io.write(waddr, &byte0f, 1);
+}
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