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Diffstat (limited to 'drivers/led/issi/is31fl3737.c')
-rw-r--r--drivers/led/issi/is31fl3737.c222
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3737.c b/drivers/led/issi/is31fl3737.c
new file mode 100644
index 000000000..0bb4ddd42
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+++ b/drivers/led/issi/is31fl3737.c
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1/* Copyright 2017 Jason Williams
2 * Copyright 2018 Jack Humbert
3 * Copyright 2018 Yiancar
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#include "is31fl3737.h"
20#include "i2c_master.h"
21#include "wait.h"
22
23// This is a 7-bit address, that gets left-shifted and bit 0
24// set to 0 for write, 1 for read (as per I2C protocol)
25// The address will vary depending on your wiring:
26// 00 <-> GND
27// 01 <-> SCL
28// 10 <-> SDA
29// 11 <-> VCC
30// ADDR1 represents A1:A0 of the 7-bit address.
31// ADDR2 represents A3:A2 of the 7-bit address.
32// The result is: 0b101(ADDR2)(ADDR1)
33#define ISSI_ADDR_DEFAULT 0x50
34
35#define ISSI_COMMANDREGISTER 0xFD
36#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
37#define ISSI_INTERRUPTMASKREGISTER 0xF0
38#define ISSI_INTERRUPTSTATUSREGISTER 0xF1
39
40#define ISSI_PAGE_LEDCONTROL 0x00 // PG0
41#define ISSI_PAGE_PWM 0x01 // PG1
42#define ISSI_PAGE_AUTOBREATH 0x02 // PG2
43#define ISSI_PAGE_FUNCTION 0x03 // PG3
44
45#define ISSI_REG_CONFIGURATION 0x00 // PG3
46#define ISSI_REG_GLOBALCURRENT 0x01 // PG3
47#define ISSI_REG_RESET 0x11 // PG3
48#define ISSI_REG_SWPULLUP 0x0F // PG3
49#define ISSI_REG_CSPULLUP 0x10 // PG3
50
51#ifndef ISSI_TIMEOUT
52# define ISSI_TIMEOUT 100
53#endif
54
55#ifndef ISSI_PERSISTENCE
56# define ISSI_PERSISTENCE 0
57#endif
58
59// Transfer buffer for TWITransmitData()
60uint8_t g_twi_transfer_buffer[20];
61
62// These buffers match the IS31FL3737 PWM registers.
63// The control buffers match the PG0 LED On/Off registers.
64// Storing them like this is optimal for I2C transfers to the registers.
65// We could optimize this and take out the unused registers from these
66// buffers and the transfers in IS31FL3737_write_pwm_buffer() but it's
67// probably not worth the extra complexity.
68
69uint8_t g_pwm_buffer[DRIVER_COUNT][192];
70bool g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
71
72uint8_t g_led_control_registers[DRIVER_COUNT][24] = {0};
73bool g_led_control_registers_update_required[DRIVER_COUNT] = {false};
74
75void IS31FL3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
76 g_twi_transfer_buffer[0] = reg;
77 g_twi_transfer_buffer[1] = data;
78
79#if ISSI_PERSISTENCE > 0
80 for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
81 if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0) break;
82 }
83#else
84 i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
85#endif
86}
87
88void IS31FL3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
89 // assumes PG1 is already selected
90
91 // transmit PWM registers in 12 transfers of 16 bytes
92 // g_twi_transfer_buffer[] is 20 bytes
93
94 // iterate over the pwm_buffer contents at 16 byte intervals
95 for (int i = 0; i < 192; i += 16) {
96 g_twi_transfer_buffer[0] = i;
97 // copy the data from i to i+15
98 // device will auto-increment register for data after the first byte
99 // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
100 for (int j = 0; j < 16; j++) {
101 g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
102 }
103
104#if ISSI_PERSISTENCE > 0
105 for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
106 if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0) break;
107 }
108#else
109 i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT);
110#endif
111 }
112}
113
114void IS31FL3737_init(uint8_t addr) {
115 // In order to avoid the LEDs being driven with garbage data
116 // in the LED driver's PWM registers, shutdown is enabled last.
117 // Set up the mode and other settings, clear the PWM registers,
118 // then disable software shutdown.
119
120 // Unlock the command register.
121 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5);
122
123 // Select PG0
124 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL);
125 // Turn off all LEDs.
126 for (int i = 0x00; i <= 0x17; i++) {
127 IS31FL3737_write_register(addr, i, 0x00);
128 }
129
130 // Unlock the command register.
131 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5);
132
133 // Select PG1
134 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM);
135 // Set PWM on all LEDs to 0
136 // No need to setup Breath registers to PWM as that is the default.
137 for (int i = 0x00; i <= 0xBF; i++) {
138 IS31FL3737_write_register(addr, i, 0x00);
139 }
140
141 // Unlock the command register.
142 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5);
143
144 // Select PG3
145 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
146 // Set global current to maximum.
147 IS31FL3737_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
148 // Disable software shutdown.
149 IS31FL3737_write_register(addr, ISSI_REG_CONFIGURATION, 0x01);
150
151 // Wait 10ms to ensure the device has woken up.
152 wait_ms(10);
153}
154
155void IS31FL3737_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
156 if (index >= 0 && index < DRIVER_LED_TOTAL) {
157 is31_led led = g_is31_leds[index];
158
159 g_pwm_buffer[led.driver][led.r] = red;
160 g_pwm_buffer[led.driver][led.g] = green;
161 g_pwm_buffer[led.driver][led.b] = blue;
162 g_pwm_buffer_update_required[led.driver] = true;
163 }
164}
165
166void IS31FL3737_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
167 for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
168 IS31FL3737_set_color(i, red, green, blue);
169 }
170}
171
172void IS31FL3737_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
173 is31_led led = g_is31_leds[index];
174
175 uint8_t control_register_r = led.r / 8;
176 uint8_t control_register_g = led.g / 8;
177 uint8_t control_register_b = led.b / 8;
178 uint8_t bit_r = led.r % 8;
179 uint8_t bit_g = led.g % 8;
180 uint8_t bit_b = led.b % 8;
181
182 if (red) {
183 g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
184 } else {
185 g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
186 }
187 if (green) {
188 g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
189 } else {
190 g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
191 }
192 if (blue) {
193 g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
194 } else {
195 g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
196 }
197
198 g_led_control_registers_update_required[led.driver] = true;
199}
200
201void IS31FL3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
202 if (g_pwm_buffer_update_required[index]) {
203 // Firstly we need to unlock the command register and select PG1
204 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5);
205 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM);
206
207 IS31FL3737_write_pwm_buffer(addr, g_pwm_buffer[index]);
208 }
209 g_pwm_buffer_update_required[index] = false;
210}
211
212void IS31FL3737_update_led_control_registers(uint8_t addr, uint8_t index) {
213 if (g_led_control_registers_update_required[index]) {
214 // Firstly we need to unlock the command register and select PG0
215 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5);
216 IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL);
217 for (int i = 0; i < 24; i++) {
218 IS31FL3737_write_register(addr, i, g_led_control_registers[index][i]);
219 }
220 }
221 g_led_control_registers_update_required[index] = false;
222}