BSP: little help added.

2 files changed, 23 insertions, 2 deletions

diff --git a/fpgaedit.l b/fpgaedit.l
index 5006ac3..db3e887 100644
--- a/fpgaedit.l
+++ b/fpgaedit.l
@@ -30,6 +30,12 @@ quit {
 	return EXIT;
 }
 
+h |
+help {
+	if (debug > 4) printf ("HELP\n"); 
+	return HELP;
+}
+
 m[dm](\.[biw])* {
 	if (strlen (yytext) == 2) yylval.val = 4;
 	else switch (*(yytext + 3)) {
diff --git a/fpgaedit.y b/fpgaedit.y
index 0754694..4110502 100644
--- a/fpgaedit.y
+++ b/fpgaedit.y
@@ -23,6 +23,8 @@ variable *vlist;
 void set_variable (char *param, int val);
 int get_variable (char *param);
 void hex_output (int offset, int len, int count);
+void print_help (void);
+
 extern void yyerror (const char *s);
 extern int yylex (void);
 %}
@@ -49,8 +51,10 @@ char *tptr;
 %left <val> MD
 %left <val> MM
 %left <val> EQ
-%left <val> EXIT
-%left <val> CR
+%token <val> EXIT
+%token <val> HELP
+%token <val> CR
+
 
 %type <val> num
 
@@ -64,6 +68,7 @@ line:	  CR
 	| open CR
 	| close CR
 	| EXIT CR { exit(EXIT_SUCCESS); }
+	| HELP CR { print_help(); }
 	| NAME CR { printf ("%s = %d\n", $1, get_variable($1)); free($1); }
 	| mem CR
 	| NAME EQ num CR { set_variable ($1, $3); free($1); }
@@ -140,6 +145,16 @@ num:	  NUM
 ;
 
 %%
+void print_help (void) {
+	printf ("help:\n");
+	printf ("open <file>\n\topen file <file>\n");
+	printf ("close\n\tclose file\n");
+	printf ("md [<start> [<end>]]\n\tdisplay from current position or <start> to <end>\n");
+	printf ("mm <offset> <val1> .. <valN>\n\tmodify from value <offset>\n");
+	printf ("<var> = <expr>\n\tset variable <var> to <expr>\n");
+	printf ("<var>\n\tprint variable <var>\n");
+}
+
 void set_variable (char *param, int val) {
 	variable *l, *tmp;