altos: Implement remote launch protocol

[fw/altos] / src / core / ao_cmd.c

diff --git a/src/core/ao_cmd.c b/src/core/ao_cmd.c
index 7663d87533a5771e205f121c388e84e3ce3cc1d0..9e14c221441096f77b2bcf943ed8c1fda5ee0c14 100644 (file)
--- a/src/core/ao_cmd.c
+++ b/src/core/ao_cmd.c
@@ -22,7 +22,7 @@ __pdata uint32_t ao_cmd_lex_u32;
 __pdata char   ao_cmd_lex_c;
 __pdata enum ao_cmd_status ao_cmd_status;
 
-#define CMD_LEN        32
+#define CMD_LEN        48
 
 static __xdata char    cmd_line[CMD_LEN];
 static __pdata uint8_t cmd_len;
@@ -128,22 +128,48 @@ ao_cmd_white(void)
                ao_cmd_lex();
 }
 
+int8_t
+ao_cmd_hexchar(char c)
+{
+       if ('0' <= c && c <= '9')
+               return (c - '0');
+       if ('a' <= c && c <= 'f')
+               return (c - 'a' + 10);
+       if ('A' <= c && c <= 'F')
+               return (c - 'A' + 10);
+       return -1;
+}
+
+void
+ao_cmd_hexbyte(void)
+{
+       uint8_t i;
+       int8_t  n;
+
+       ao_cmd_lex_i = 0;
+       ao_cmd_white();
+       for (i = 0; i < 2; i++) {
+               n = ao_cmd_hexchar(ao_cmd_lex_c);
+               if (n < 0) {
+                       ao_cmd_status = ao_cmd_syntax_error;
+                       break;
+               }
+               ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
+               ao_cmd_lex();
+       }
+}
+
 void
 ao_cmd_hex(void)
 {
        __pdata uint8_t r = ao_cmd_lex_error;
-       uint8_t n;
+       int8_t  n;
 
        ao_cmd_lex_i = 0;
        ao_cmd_white();
        for(;;) {
-               if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
-                       n = (ao_cmd_lex_c - '0');
-               else if ('a' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'f')
-                       n = (ao_cmd_lex_c - 'a' + 10);
-               else if ('A' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'F')
-                       n = (ao_cmd_lex_c - 'A' + 10);
-               else
+               n = ao_cmd_hexchar(ao_cmd_lex_c);
+               if (n < 0)
                        break;
                ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
                r = ao_cmd_success;