Diff: seven_segment.h

Revision:

0:78b84e1ce9df

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/seven_segment.h	Tue Feb 18 21:16:23 2020 +0000
@@ -0,0 +1,110 @@
+#ifndef SEVEN_SEGMENT_H
+#define SEVEN_SEGMENT_H
+
+#ifndef BIT
+#define BIT(N) (1 << (N))
+#endif
+
+/* This file contains routines for controlling a single seven segment   */
+/* display.                                                             */
+/* The assumption is of a common cathode display where each anode is    */
+/* individually controlled by an active-high signal from a port pin.    */
+/* The further assumption is that the control will be through an        */
+/* eight-bit BusOut structure where the segment control bits are        */
+/* defined from most significant to least significant as:               */
+/* DP, G, F, E, D, C, B, A                                              */
+/*
+      AAA
+     F   B
+     F   B
+     F   B
+      GGG
+     E   C
+     E   C
+     E   C  DP
+      DDD   DP
+*/
+
+/*
+#define SEG_A BIT(0)
+#define SEG_B BIT(1)
+#define SEG_C BIT(2)
+#define SEG_D BIT(3)
+#define SEG_E BIT(4)
+#define SEG_F BIT(5)
+#define SEG_G BIT(6)
+#define SEG_DP BIT(7)
+
+int seven_segment_pattern [16]= { 
+(SEG_A+SEG_B+SEG_C+SEG_D+SEG_E+SEG_F),
+(SEG_B+SEG_C),
+(SEG_A+SEG_B+SEG_D+SEG_E+SEG_G),
+(SEG_A+SEG_B+SEG_C+SEG_D+SEG_G),
+(SEG_B+SEG_C+SEG_F+SEG_G),
+(SEG_A+SEG_C+SEG_D+SEG_F+SEG_G),
+(SEG_A+SEG_C+SEG_D+SEG_E+SEG_F+SEG_G),
+(SEG_A+SEG_B+SEG_C),
+(SEG_A+SEG_B+SEG_C+SEG_D+SEG_E+SEG_F+SEG_G),
+(SEG_A+SEG_B+SEG_C+SEG_D+SEG_F+SEG_G),
+(SEG_A+SEG_B+SEG_C+SEG_E+SEG_F+SEG_G),
+(SEG_C+SEG_D+SEG_E+SEG_F+SEG_G),
+(SEG_ASEG_D+SEG_E+SEG_F),
+(SEG_B+SEG_C+SEG_D+SEG_E+SEG_G),
+(SEG_A+SEG_D+SEG_E+SEG_F+SEG_G),
+(SEG_A+SEG_E+SEG_F+SEG_G)
+};
+*/
+
+int seven_segment_pattern [16]= {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
+/*                               0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   A,   b,   C,   d,   E,   F  */    
+
+//BusOut seven_segment(SEVEN_SEGMENT_A,SEVEN_SEGMENT_B,SEVEN_SEGMENT_C,SEVEN_SEGMENT_D,SEVEN_SEGMENT_E,SEVEN_SEGMENT_F,SEVEN_SEGMENT_G,SEVEN_SEGMENT_DP);
+BusOut seven_segment(NC, NC, NC, NC, NC, NC, NC, NC);
+
+int seven_segment_find_pattern(char ss_out)
+{
+
+    if((ss_out >= 0) && (ss_out <=15))
+    {
+        return(seven_segment_pattern[ss_out]);
+    }
+    else if((ss_out >= '0') && (ss_out <='9'))
+    {
+        return(seven_segment_pattern[ss_out-'0']);
+    }
+    else if((ss_out >= 'A') && (ss_out <='F'))
+    {
+        return(seven_segment_pattern[ss_out-'A'+10]);
+    }
+    else if((ss_out >= 'a') && (ss_out <='f'))
+    {
+        return(seven_segment_pattern[ss_out-'a'+10]);
+    }
+    else if(ss_out =='*')
+    {
+        return(seven_segment_pattern[0x0E]);
+    }
+    else if(ss_out =='#')
+    {
+        return(seven_segment_pattern[0x0F]);
+    }
+    else 
+    {
+       return(0);
+    }
+    
+}   /* end of seven_segment_output() */
+    
+int seven_segment_output(char ss_out)
+{
+    int pattern;
+    pattern=seven_segment_find_pattern(ss_out);
+    seven_segment=pattern;
+    return(pattern);
+      
+}   /* end of seven_segment_output() */
+
+
+
+
+#endif /* #ifndef SEVEN_SEGMENT_H */
\ No newline at end of file