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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* Copyright 2024 HorrorTroll <https://github.com/HorrorTroll>
* Copyright 2024 Harrison Chan (Xelus)
* Copyright 2024 Dimitris Mantzouranis <d3xter93@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "is31fl3729.h"
#include "i2c_master.h"
#include "wait.h"
#define IS31FL3729_PWM_REGISTER_COUNT 143
#define IS31FL3729_SCALING_REGISTER_COUNT 16
#ifndef IS31FL3729_I2C_TIMEOUT
# define IS31FL3729_I2C_TIMEOUT 100
#endif
#ifndef IS31FL3729_I2C_PERSISTENCE
# define IS31FL3729_I2C_PERSISTENCE 0
#endif
#ifndef IS31FL3729_CONFIGURATION
# define IS31FL3729_CONFIGURATION IS31FL3729_CONFIG_SWS_15_9
#endif
#ifndef IS31FL3729_GLOBAL_CURRENT
# define IS31FL3729_GLOBAL_CURRENT 0x40
#endif
#ifndef IS31FL3729_PULLDOWNUP
# define IS31FL3729_PULLDOWNUP 0x33
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM
# define IS31FL3729_SPREAD_SPECTRUM IS31FL3729_SSP_DISABLE
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM_RANGE
# define IS31FL3729_SPREAD_SPECTRUM_RANGE IS31FL3729_RNG_5_PERCENT
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME
# define IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME IS31FL3729_CLT_1980_US
#endif
#ifndef IS31FL3729_PWM_FREQUENCY
# define IS31FL3729_PWM_FREQUENCY IS31FL3729_PWM_FREQUENCY_32K_HZ
#endif
// These buffers match the PWM & scaling registers.
// Storing them like this is optimal for I2C transfers to the registers.
typedef struct is31fl3729_driver_t {
uint8_t pwm_buffer[IS31FL3729_PWM_REGISTER_COUNT];
bool pwm_buffer_dirty;
uint8_t scaling_buffer[IS31FL3729_SCALING_REGISTER_COUNT];
bool scaling_buffer_dirty;
} PACKED is31fl3729_driver_t;
is31fl3729_driver_t driver_buffers[IS31FL3729_DRIVER_COUNT] = {{
.pwm_buffer = {0},
.pwm_buffer_dirty = false,
.scaling_buffer = {0},
.scaling_buffer_dirty = false,
}};
void is31fl3729_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
#if IS31FL3729_I2C_PERSISTENCE > 0
for (uint8_t i = 0; i < IS31FL3729_I2C_PERSISTENCE; i++) {
if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(addr << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT);
#endif
}
void is31fl3729_write_pwm_buffer(uint8_t addr, uint8_t index) {
// Transmit PWM registers in 9 transfers of 16 bytes.
// Iterate over the pwm_buffer contents at 16 byte intervals.
for (uint8_t i = 0; i <= IS31FL3729_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3729_I2C_PERSISTENCE > 0
for (uint8_t j = 0; j < IS31FL3729_I2C_PERSISTENCE; j++) {
if (i2c_write_register(addr << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(addr << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3729_I2C_TIMEOUT);
#endif
}
}
void is31fl3729_init_drivers(void) {
i2c_init();
is31fl3729_init(IS31FL3729_I2C_ADDRESS_1);
#if defined(IS31FL3729_I2C_ADDRESS_2)
is31fl3729_init(IS31FL3729_I2C_ADDRESS_2);
# if defined(IS31FL3729_I2C_ADDRESS_3)
is31fl3729_init(IS31FL3729_I2C_ADDRESS_3);
# if defined(IS31FL3729_I2C_ADDRESS_4)
is31fl3729_init(IS31FL3729_I2C_ADDRESS_4);
# endif
# endif
#endif
for (int i = 0; i < IS31FL3729_LED_COUNT; i++) {
is31fl3729_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
}
is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_1, 0);
#if defined(IS31FL3729_I2C_ADDRESS_2)
is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_2, 1);
# if defined(IS31FL3729_I2C_ADDRESS_3)
is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_3, 2);
# if defined(IS31FL3729_I2C_ADDRESS_4)
is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_4, 3);
# endif
# endif
#endif
}
void is31fl3729_init(uint8_t addr) {
// In order to avoid the LEDs being driven with garbage data
// in the LED driver's PWM registers, shutdown is enabled last.
// Set up the mode and other settings, clear the PWM registers,
// then disable software shutdown.
// Set Pull up & Down for SWx CSy
is31fl3729_write_register(addr, IS31FL3729_REG_PULLDOWNUP, IS31FL3729_PULLDOWNUP);
// Set Spread Spectrum Register if applicable
is31fl3729_write_register(addr, IS31FL3729_REG_SPREAD_SPECTRUM, ((IS31FL3729_SPREAD_SPECTRUM & 0b1) << 4) | ((IS31FL3729_SPREAD_SPECTRUM_RANGE & 0b11) << 2) | (IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME & 0b11));
// Set PWM Frequency Register if applicable
is31fl3729_write_register(addr, IS31FL3729_REG_PWM_FREQUENCY, IS31FL3729_PWM_FREQUENCY);
// Set Golbal Current Control Register
is31fl3729_write_register(addr, IS31FL3729_REG_GLOBAL_CURRENT, IS31FL3729_GLOBAL_CURRENT);
// Set to Normal operation
is31fl3729_write_register(addr, IS31FL3729_REG_CONFIGURATION, IS31FL3729_CONFIGURATION);
// Wait 10ms to ensure the device has woken up.
wait_ms(10);
}
void is31fl3729_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
is31fl3729_led_t led;
if (index >= 0 && index < IS31FL3729_LED_COUNT) {
memcpy_P(&led, (&g_is31fl3729_leds[index]), sizeof(led));
if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
return;
}
driver_buffers[led.driver].pwm_buffer[led.r] = red;
driver_buffers[led.driver].pwm_buffer[led.g] = green;
driver_buffers[led.driver].pwm_buffer[led.b] = blue;
driver_buffers[led.driver].pwm_buffer_dirty = true;
}
}
void is31fl3729_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
for (int i = 0; i < IS31FL3729_LED_COUNT; i++) {
is31fl3729_set_color(i, red, green, blue);
}
}
void is31fl3729_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) {
is31fl3729_led_t led;
memcpy_P(&led, (&g_is31fl3729_leds[index]), sizeof(led));
// need to do a bit of checking here since 3729 scaling is per CS pin.
// not the usual per RGB key as per other ISSI drivers
// only enable them, since they should be default disabled
int cs_red = (led.r & 0x0F) - 1;
int cs_green = (led.g & 0x0F) - 1;
int cs_blue = (led.b & 0x0F) - 1;
driver_buffers[led.driver].scaling_buffer[cs_red] = red;
driver_buffers[led.driver].scaling_buffer[cs_green] = green;
driver_buffers[led.driver].scaling_buffer[cs_blue] = blue;
driver_buffers[led.driver].scaling_buffer_dirty = true;
}
void is31fl3729_update_pwm_buffers(uint8_t addr, uint8_t index) {
if (driver_buffers[index].pwm_buffer_dirty) {
is31fl3729_write_pwm_buffer(addr, index);
driver_buffers[index].pwm_buffer_dirty = false;
}
}
void is31fl3729_update_scaling_registers(uint8_t addr, uint8_t index) {
if (driver_buffers[index].scaling_buffer_dirty) {
for (uint8_t i = 0; i < IS31FL3729_SCALING_REGISTER_COUNT; i++) {
is31fl3729_write_register(addr, IS31FL3729_REG_SCALING + i, driver_buffers[index].scaling_buffer[i]);
}
driver_buffers[index].scaling_buffer_dirty = false;
}
}
void is31fl3729_flush(void) {
is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_1, 0);
#if defined(IS31FL3729_I2C_ADDRESS_2)
is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_2, 1);
# if defined(IS31FL3729_I2C_ADDRESS_3)
is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_3, 2);
# if defined(IS31FL3729_I2C_ADDRESS_4)
is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_4, 3);
# endif
# endif
#endif
}
|
