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author | Björn Stenberg <bjorn@haxx.se> | 2002-03-28 15:09:10 +0000 |
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committer | Björn Stenberg <bjorn@haxx.se> | 2002-03-28 15:09:10 +0000 |
commit | d9eb5c76032867f2f1f03d591c61c59be799fa7a (patch) | |
tree | f0adb17755cc95ddc908842b7d5ff63f5cd4db4e /firmware/serial.c | |
parent | cd0f122071947ea08edea827efe176413de07151 (diff) | |
download | rockbox-d9eb5c76032867f2f1f03d591c61c59be799fa7a.tar.gz rockbox-d9eb5c76032867f2f1f03d591c61c59be799fa7a.zip |
First version
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@60 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/serial.c')
-rw-r--r-- | firmware/serial.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/firmware/serial.c b/firmware/serial.c new file mode 100644 index 0000000000..1269083aab --- /dev/null +++ b/firmware/serial.c | |||
@@ -0,0 +1,82 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Alan Korr | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | |||
20 | #include <serial.h> | ||
21 | #include <lcd.h> | ||
22 | |||
23 | #define TDRE 7 /* transmit data register empty */ | ||
24 | #define RDRF 6 /* receive data register full */ | ||
25 | #define ORER 5 /* overrun error */ | ||
26 | #define FER 4 /* frame error */ | ||
27 | #define PER 3 /* parity error */ | ||
28 | |||
29 | static int serial_byte,serial_flag; | ||
30 | |||
31 | void serial_putc (char byte) | ||
32 | { | ||
33 | static int i = 0; | ||
34 | while (!(QI(SCISSR1) & (1<<TDRE))); | ||
35 | QI(SCITDR1) = byte; | ||
36 | clear_bit (TDRE,SCISSR1); | ||
37 | lcd_goto ((i++)%11,1); lcd_putc (byte); | ||
38 | } | ||
39 | |||
40 | void serial_puts (char const *string) | ||
41 | { | ||
42 | int byte; | ||
43 | while ((byte = *string++)) | ||
44 | serial_putc (byte); | ||
45 | } | ||
46 | |||
47 | int serial_getc( void ) | ||
48 | { | ||
49 | int byte; | ||
50 | while (!serial_flag); | ||
51 | byte = serial_byte; | ||
52 | serial_flag = 0; | ||
53 | serial_putc (byte); | ||
54 | return byte; | ||
55 | } | ||
56 | |||
57 | void serial_setup (int baudrate) | ||
58 | { | ||
59 | QI(SCISCR1) = | ||
60 | QI(SCISSR1) = | ||
61 | QI(SCISMR1) = 0; | ||
62 | QI(SCIBRR1) = (PHI/(32*baudrate))-1; | ||
63 | QI(SCISCR1) = 0x70; | ||
64 | } | ||
65 | |||
66 | #pragma interrupt | ||
67 | void REI1 (void) | ||
68 | { | ||
69 | clear_bit (FER,SCISSR1); | ||
70 | } | ||
71 | |||
72 | #pragma interrupt | ||
73 | void RXI1 (void) | ||
74 | { | ||
75 | serial_byte = QI(SCIRDR1); | ||
76 | serial_flag = 1; | ||
77 | clear_bit (RDRF,SCISSR1); | ||
78 | if (serial_byte == '0') | ||
79 | lcd_turn_off_backlight (); | ||
80 | if (serial_byte == '1') | ||
81 | lcd_turn_on_backlight (); | ||
82 | } | ||