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1 | /* | |
2 | * This file is part of the sigrok-firmware-fx2lafw project. | |
3 | * | |
4 | * Copyright (C) 2009 Ubixum, Inc. | |
5 | * Copyright (C) 2015 Jochen Hoenicke | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <fx2macros.h> | |
22 | #include <fx2ints.h> | |
23 | #include <autovector.h> | |
24 | #include <delay.h> | |
25 | #include <setupdat.h> | |
26 | ||
27 | #define SET_ANALOG_MODE() do { PA7 = 1; } while (0) | |
28 | ||
29 | #define SET_COUPLING(x) | |
30 | ||
31 | #define SET_CALIBRATION_PULSE(x) | |
32 | ||
33 | #define TOGGLE_CALIBRATION_PIN() do { PC2 = !PC2; } while (0) | |
34 | ||
35 | #define LED_CLEAR() do { PC0 = 1; PC1 = 1; } while (0) | |
36 | #define LED_GREEN() do { PC0 = 1; PC1 = 0; } while (0) | |
37 | #define LED_RED() do { PC0 = 0; PC1 = 1; } while (0) | |
38 | ||
39 | #define TIMER2_VAL 500 | |
40 | ||
41 | /* CTLx pin index (IFCLK, ADC clock input). */ | |
42 | #define CTL_BIT 0 | |
43 | ||
44 | #define OUT0 ((1 << CTL_BIT) << 4) /* OEx = 1, CTLx = 0 */ | |
45 | ||
46 | static const struct samplerate_info samplerates[] = { | |
47 | { 48, 0x80, 0, 3, 0, 0x00, 0xea }, | |
48 | { 30, 0x80, 0, 3, 0, 0x00, 0xaa }, | |
49 | { 24, 1, 0, 2, 1, OUT0, 0xca }, | |
50 | { 16, 1, 1, 2, 0, OUT0, 0xca }, | |
51 | { 12, 2, 1, 2, 0, OUT0, 0xca }, | |
52 | { 8, 3, 2, 2, 0, OUT0, 0xca }, | |
53 | { 4, 6, 5, 2, 0, OUT0, 0xca }, | |
54 | { 2, 12, 11, 2, 0, OUT0, 0xca }, | |
55 | { 1, 24, 23, 2, 0, OUT0, 0xca }, | |
56 | { 50, 48, 47, 2, 0, OUT0, 0xca }, | |
57 | { 20, 120, 119, 2, 0, OUT0, 0xca }, | |
58 | { 10, 240, 239, 2, 0, OUT0, 0xca }, | |
59 | }; | |
60 | ||
61 | /* | |
62 | * This sets three bits for each channel, one channel at a time. | |
63 | * For channel 0 we want to set bits 1, 2 & 3 | |
64 | * For channel 1 we want to set bits 4, 5 & 6 | |
65 | * | |
66 | * We convert the input values that are strange due to original | |
67 | * firmware code into the value of the three bits as follows: | |
68 | * | |
69 | * val -> bits | |
70 | * 1 -> 010b | |
71 | * 2 -> 001b | |
72 | * 5 -> 000b | |
73 | * 10 -> 011b | |
74 | * | |
75 | * The third bit is always zero since there are only four outputs connected | |
76 | * in the serial selector chip. | |
77 | * | |
78 | * The multiplication of the converted value by 0x24 sets the relevant bits in | |
79 | * both channels and then we mask it out to only affect the channel currently | |
80 | * requested. | |
81 | */ | |
82 | static BOOL set_voltage(BYTE channel, BYTE val) | |
83 | { | |
84 | BYTE bits, mask; | |
85 | ||
86 | switch (val) { | |
87 | case 1: | |
88 | bits = 0x02; | |
89 | break; | |
90 | case 2: | |
91 | bits = 0x01; | |
92 | break; | |
93 | case 5: | |
94 | bits = 0x00; | |
95 | break; | |
96 | case 10: | |
97 | bits = 0x03; | |
98 | break; | |
99 | default: | |
100 | return FALSE; | |
101 | } | |
102 | ||
103 | bits = bits << (channel ? 4 : 1); | |
104 | mask = (channel) ? 0x70 : 0x0e; | |
105 | IOA = (IOA & ~mask) | (bits & mask); | |
106 | ||
107 | return TRUE; | |
108 | } | |
109 | ||
110 | #include <scope.inc> |