altos: Make cmd echo per-connection instead of global

Allow different connections to use different echo values, permitting
the packet link to turn off echo while the USB link still has it on.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/ao.h b/src/ao.h
index b92e623f..9b375894 100644
--- a/src/ao.h
+++ b/src/ao.h
@@ -1178,8 +1178,10 @@ struct ao_stdio {
 	char	(*pollchar)(void);
 	void	(*putchar)(char c) __reentrant;
 	void	(*flush)(void);
+	uint8_t	echo;
 };
 
+extern __xdata struct ao_stdio ao_stdios[];
 extern __data int8_t ao_cur_stdio;
 extern __data int8_t ao_num_stdios;
 
@@ -1188,6 +1190,9 @@ flush(void);
 
 extern __xdata uint8_t ao_stdin_ready;
 
+uint8_t
+ao_echo(void);
+
 void
 ao_add_stdio(char (*pollchar)(void),
 	     void (*putchar)(char) __reentrant,