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1 | /* | |
2 | * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include "common.h" | |
8 | #include <string.h> | |
9 | #include <avr/wdt.h> | |
10 | ||
11 | #include "config.h" | |
12 | #include "serial.h" | |
13 | #include "background.h" | |
14 | #include "con-utils.h" | |
15 | ||
16 | uint_fast8_t tstc(void) | |
17 | { | |
18 | bg_shed(); | |
19 | return serial_tstc(); | |
20 | } | |
21 | ||
22 | int my_getchar(uint_fast8_t waitforchar) | |
23 | { | |
24 | int c; | |
25 | ||
26 | do { | |
27 | bg_shed(); | |
28 | c = serial_getc(); | |
29 | } while ((c < 0) && waitforchar); | |
30 | ||
31 | #ifdef CONFIG_SYS_FBOOTSIG | |
32 | if (c < 0) | |
33 | return c; | |
34 | ||
35 | static const FLASH unsigned char bootsig[] = {CONFIG_SYS_FBOOTSIG}; | |
36 | static uint8_t pb; | |
37 | unsigned char uc = c; | |
38 | ||
39 | ||
40 | if (bootsig[pb] == 0) { | |
41 | if (uc == 0xff) { | |
42 | wdt_enable(WDTO_15MS); | |
43 | for(;;) | |
44 | ; | |
45 | } else | |
46 | pb = 0; | |
47 | ||
48 | } else { | |
49 | if (bootsig[pb] == uc) | |
50 | pb++; | |
51 | else | |
52 | pb = 0; | |
53 | } | |
54 | #endif | |
55 | ||
56 | return c; | |
57 | } | |
58 | ||
59 | ||
60 | /* test if ctrl-c was pressed */ | |
61 | ||
62 | static uint_fast8_t ctrlc_disabled; /* see disable_ctrl() */ | |
63 | static uint_fast8_t ctrlc_was_pressed; | |
64 | ||
65 | uint_fast8_t ctrlc(void) | |
66 | { | |
67 | bg_shed(); | |
68 | if (!ctrlc_disabled) { | |
69 | switch (serial_getc()) { | |
70 | case 0x03: /* ^C - Control C */ | |
71 | ctrlc_was_pressed = 1; | |
72 | return 1; | |
73 | default: | |
74 | break; | |
75 | } | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* Reads user's confirmation. | |
81 | Returns 1 if user's input is "y", "Y", "yes" or "YES" | |
82 | */ | |
83 | uint_fast8_t confirm_yesno(void) | |
84 | { | |
85 | unsigned int i; | |
86 | char str_input[5]; | |
87 | ||
88 | /* Flush input */ | |
89 | while (serial_getc()) | |
90 | ; | |
91 | i = 0; | |
92 | while (i < sizeof(str_input)) { | |
93 | str_input[i] = my_getchar(1); | |
94 | putchar(str_input[i]); | |
95 | if (str_input[i] == '\r') | |
96 | break; | |
97 | i++; | |
98 | } | |
99 | putchar('\n'); | |
100 | if (strncmp(str_input, "y\r", 2) == 0 || | |
101 | strncmp(str_input, "Y\r", 2) == 0 || | |
102 | strncmp(str_input, "yes\r", 4) == 0 || | |
103 | strncmp(str_input, "YES\r", 4) == 0) | |
104 | return 1; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | /* pass 1 to disable ctrlc() checking, 0 to enable. | |
109 | * returns previous state | |
110 | */ | |
111 | uint_fast8_t disable_ctrlc(uint_fast8_t disable) | |
112 | { | |
113 | uint_fast8_t prev = ctrlc_disabled; /* save previous state */ | |
114 | ||
115 | ctrlc_disabled = disable; | |
116 | return prev; | |
117 | } | |
118 | ||
119 | uint_fast8_t had_ctrlc (void) | |
120 | { | |
121 | return ctrlc_was_pressed; | |
122 | } | |
123 | ||
124 | void clear_ctrlc(void) | |
125 | { | |
126 | ctrlc_was_pressed = 0; | |
127 | } |