|
 |
f96e0b |
From 259d86f862615a6135d96553768b564785f56a30 Mon Sep 17 00:00:00 2001
|
|
|
f96e0b |
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
|
|
|
f96e0b |
Date: Mon, 21 Jan 2013 21:05:33 +0100
|
|
|
f96e0b |
Subject: [PATCH 136/482] Improve spkmodem reliability by adding a separator
|
|
|
f96e0b |
between bytes.
|
|
|
f96e0b |
|
|
|
f96e0b |
---
|
|
|
f96e0b |
grub-core/term/spkmodem.c | 14 +++++++-------
|
|
|
f96e0b |
1 file changed, 7 insertions(+), 7 deletions(-)
|
|
|
f96e0b |
|
|
|
f96e0b |
diff --git a/grub-core/term/spkmodem.c b/grub-core/term/spkmodem.c
|
|
|
f96e0b |
index 5bff429..f20a27d 100644
|
|
|
f96e0b |
--- a/grub-core/term/spkmodem.c
|
|
|
f96e0b |
+++ b/grub-core/term/spkmodem.c
|
|
|
f96e0b |
@@ -70,12 +70,7 @@ put (struct grub_term_output *term __attribute__ ((unused)), const int c)
|
|
|
f96e0b |
{
|
|
|
f96e0b |
int i;
|
|
|
f96e0b |
|
|
|
f96e0b |
- if (!inited)
|
|
|
f96e0b |
- {
|
|
|
f96e0b |
- make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 50, 20);
|
|
|
f96e0b |
- inited = 1;
|
|
|
f96e0b |
- }
|
|
|
f96e0b |
-
|
|
|
f96e0b |
+ make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 4);
|
|
|
f96e0b |
for (i = 7; i >= 0; i--)
|
|
|
f96e0b |
{
|
|
|
f96e0b |
if ((c >> i) & 1)
|
|
|
f96e0b |
@@ -84,12 +79,17 @@ put (struct grub_term_output *term __attribute__ ((unused)), const int c)
|
|
|
f96e0b |
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 4000, 40);
|
|
|
f96e0b |
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 1000, 10);
|
|
|
f96e0b |
}
|
|
|
f96e0b |
- make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 50, 0);
|
|
|
f96e0b |
+ make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 0);
|
|
|
f96e0b |
}
|
|
|
f96e0b |
|
|
|
f96e0b |
static grub_err_t
|
|
|
f96e0b |
grub_spkmodem_init_output (struct grub_term_output *term)
|
|
|
f96e0b |
{
|
|
|
f96e0b |
+ /* Some models shutdown sound when not in use and it takes for it
|
|
|
f96e0b |
+ around 30 ms to come back on which loses 3 bits. So generate a base
|
|
|
f96e0b |
+ 200 Hz continously. */
|
|
|
f96e0b |
+
|
|
|
f96e0b |
+ make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 0);
|
|
|
f96e0b |
grub_terminfo_output_init (term);
|
|
|
f96e0b |
|
|
|
f96e0b |
return 0;
|
|
|
f96e0b |
--
|
|
|
f96e0b |
1.8.2.1
|
|
|
f96e0b |
|