-
Notifications
You must be signed in to change notification settings - Fork 0
/
gbs2cpc.ino
197 lines (163 loc) · 4.26 KB
/
gbs2cpc.ino
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
// description: GBS8200 configuration to work with CPC RGBS signal.
// author: issalig
//
// credits:
// original code from https://github.com/pulkomandy/gembascan for LM4F120 board
// StartWire and StopWire from https://github.com/ramapcsx2/gbs-control
//
// status:
// It works with ESP8266 Wemos Mini and arduino
//
// play:
// Connect GND, SCL -> D1 (wemos), SDA -> D2 (wemos)
#include <Wire.h>
#include "StartArray.h"
#include "ProgramArray288p.h"
#if defined(__AVR_ATtiny85__)
#define SCL 7
#define SDA 5
#endif
void scan_i2c() {
Serial.println("Start I2C scanner ...");
Serial.print("\r\n");
byte count = 0;
for (byte i = 8; i < 120; i++)
{
Wire.beginTransmission(i);
if (Wire.endTransmission() == 0)
{
Serial.print("Found I2C Device: ");
Serial.print(" (0x");
Serial.print(i, HEX);
Serial.println(")");
count++;
delay(1);
}
}
Serial.print("\r\n");
Serial.println("Finish I2C scanner");
Serial.print("Found ");
Serial.print(count, HEX);
Serial.println(" Device(s).");
}
void startWire() {
Wire.begin();
// The i2c wire library sets pullup resistors on by default.
// Disable these to detect/work with GBS onboard pullups
#if defined(__AVR__)
pinMode(SCL, OUTPUT);
pinMode(SDA, OUTPUT);
#elif defined(ESP8266)
pinMode(SCL, OUTPUT_OPEN_DRAIN);
pinMode(SDA, OUTPUT_OPEN_DRAIN);
#endif
// no issues even at 700k, requires ESP8266 160Mhz CPU clock, else (80Mhz) uses 400k in library
// no problem with Si5351 at 700k either
Wire.setClock(400000);
//Wire.setClock(700000);
}
void stopWire() {
pinMode(SCL, INPUT);
pinMode(SDA, INPUT);
delayMicroseconds(80);
}
void setup() {
Serial.begin(115200);
startWire();
//scan_i2c();
Serial.print("Starting GBS8200...\n");
for (int i = 0; i < sizeof(startArray); i = i + 2)
{
Wire.beginTransmission(0x17);
Wire.write(startArray[i]);
Wire.write(startArray[i + 1]);
Wire.endTransmission();
}
pal288p();
}
void loop() {
//nothing for now, all is done in setup
}
int pal288p() {
Serial.print("Configuring to PAL progressive");
for (int bank = 0; bank < 6; bank++) {
// Switch bank command
Wire.beginTransmission(0x17);
Wire.write(0xF0);
// Param: bank number
Wire.write(bank);
Wire.endTransmission();
for (int i = 0; i < programArray288[bank].size; i++)
{
int io = (i + programArray288[bank].offset) & 0xFF;
// Send them 16 bytes at a time, first giving the register number.
if ((i % 16) == 0) {
// Start of a new block
Wire.beginTransmission(0x17);
Wire.write(io);
Wire.write(programArray288[bank].data[i]);
} else if (i % 16 == 15) {
// End of 16byte block, or end of bank
Wire.write(programArray288[bank].data[i]);
Wire.endTransmission();
} else {
Wire.write(programArray288[bank].data[i]);
}
}
}
return 0;
}
//TODO: test this functions, just a quick and dirty translation
int peek(unsigned long reg)
{
Wire.beginTransmission(0x17);
// Switch bank command
Wire.write(0XF0);
// Param: bank number
Wire.write(reg / 256);
Wire.endTransmission();
delay(5);
// Send register address byte
Wire.beginTransmission(0x17);
Wire.write(0xFF);
Wire.endTransmission();
delay(5);
// Get register value
int value;
Wire.requestFrom(0x17, (uint8_t)1);
while (Wire.available())
{
value = Wire.read();
Serial.println(); Serial.println(value);
}
#if defined(__AVR__)
Serial.print("reg "); Serial.print(reg);
Serial.print("value "); Serial.println(value);
#elif defined(ESP8266)
Serial.printf("Reg %x value %x\n", reg, value);
#endif
return 0;
}
int poke( unsigned long reg, unsigned long val )
{
// Switch bank command
Wire.beginTransmission(0x17);
Wire.write(0xF0);
// Param: bank number
Wire.write(reg / 256);
Wire.endTransmission();
delay(5);
// Send register address byte
Wire.beginTransmission(0x17);
Wire.write(0xFF);
// Set register value
Wire.write(val&0xFF);
Wire.endTransmission();
#if defined(__AVR__)
Serial.print("reg "); Serial.print(reg);
Serial.print("set to "); Serial.println(val);
#elif defined(ESP8266)
Serial.printf("Reg %x set to %x\n", reg, val);
#endif
return 0;
}