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
|
/* Copyright 2021 Jasper Chan
* 2023 Huckies <https://github.com/Huckies>
*
* 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 "aw20216s.h"
#include "wait.h"
#include "spi_master.h"
#define AW20216S_PWM_REGISTER_COUNT 216
#ifndef AW20216S_CONFIGURATION
# define AW20216S_CONFIGURATION (AW20216S_CONFIGURATION_SWSEL_1_12 | AW20216S_CONFIGURATION_CHIPEN)
#endif
#ifndef AW20216S_MIX_FUNCTION
# define AW20216S_MIX_FUNCTION (AW20216S_MIX_FUNCTION_LPEN)
#endif
#ifndef AW20216S_SCALING_MAX
# define AW20216S_SCALING_MAX 150
#endif
#ifndef AW20216S_GLOBAL_CURRENT_MAX
# define AW20216S_GLOBAL_CURRENT_MAX 150
#endif
#ifndef AW20216S_SPI_MODE
# define AW20216S_SPI_MODE 0
#endif
#ifndef AW20216S_SPI_DIVISOR
# define AW20216S_SPI_DIVISOR 4
#endif
uint8_t g_pwm_buffer[AW20216S_DRIVER_COUNT][AW20216S_PWM_REGISTER_COUNT];
bool g_pwm_buffer_update_required[AW20216S_DRIVER_COUNT] = {false};
bool aw20216s_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
static uint8_t s_spi_transfer_buffer[2] = {0};
if (!spi_start(cs_pin, false, AW20216S_SPI_MODE, AW20216S_SPI_DIVISOR)) {
spi_stop();
return false;
}
s_spi_transfer_buffer[0] = (AW20216S_ID | page | AW20216S_WRITE);
s_spi_transfer_buffer[1] = reg;
if (spi_transmit(s_spi_transfer_buffer, 2) != SPI_STATUS_SUCCESS) {
spi_stop();
return false;
}
if (spi_transmit(data, len) != SPI_STATUS_SUCCESS) {
spi_stop();
return false;
}
spi_stop();
return true;
}
static inline bool aw20216s_write_register(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t value) {
// Little wrapper so callers need not care about sending a buffer
return aw20216s_write(cs_pin, page, reg, &value, 1);
}
void aw20216s_soft_reset(pin_t cs_pin) {
aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_RESET, AW20216S_RESET_MAGIC);
}
static void aw20216s_init_scaling(pin_t cs_pin) {
// Set constant current to the max, control brightness with PWM
for (uint8_t i = 0; i < AW20216S_PWM_REGISTER_COUNT; i++) {
aw20216s_write_register(cs_pin, AW20216S_PAGE_SCALING, i, AW20216S_SCALING_MAX);
}
}
static inline void aw20216s_init_current_limit(pin_t cs_pin) {
// Push config
aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_GLOBAL_CURRENT, AW20216S_GLOBAL_CURRENT_MAX);
}
static inline void aw20216s_soft_enable(pin_t cs_pin) {
// Push config
aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_CONFIGURATION, AW20216S_CONFIGURATION);
}
static inline void aw20216s_auto_lowpower(pin_t cs_pin) {
aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_MIX_FUNCTION, AW20216S_MIX_FUNCTION);
}
void aw20216s_init_drivers(void) {
spi_init();
aw20216s_init(AW20216S_CS_PIN_1, AW20216S_EN_PIN_1);
#if defined(AW20216S_CS_PIN_2)
aw20216s_init(AW20216S_CS_PIN_2, AW20216S_EN_PIN_2);
#endif
}
void aw20216s_init(pin_t cs_pin, pin_t en_pin) {
setPinOutput(en_pin);
writePinHigh(en_pin);
aw20216s_soft_reset(cs_pin);
wait_ms(2);
// Drivers should start with all scaling and PWM registers as off
aw20216s_init_current_limit(cs_pin);
aw20216s_init_scaling(cs_pin);
aw20216s_soft_enable(cs_pin);
aw20216s_auto_lowpower(cs_pin);
}
void aw20216s_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
aw20216s_led_t led;
memcpy_P(&led, (&g_aw20216s_leds[index]), sizeof(led));
if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
return;
}
g_pwm_buffer[led.driver][led.r] = red;
g_pwm_buffer[led.driver][led.g] = green;
g_pwm_buffer[led.driver][led.b] = blue;
g_pwm_buffer_update_required[led.driver] = true;
}
void aw20216s_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
for (uint8_t i = 0; i < AW20216S_LED_COUNT; i++) {
aw20216s_set_color(i, red, green, blue);
}
}
void aw20216s_update_pwm_buffers(pin_t cs_pin, uint8_t index) {
if (g_pwm_buffer_update_required[index]) {
aw20216s_write(cs_pin, AW20216S_PAGE_PWM, 0, g_pwm_buffer[index], AW20216S_PWM_REGISTER_COUNT);
}
g_pwm_buffer_update_required[index] = false;
}
void aw20216s_flush(void) {
aw20216s_update_pwm_buffers(AW20216S_CS_PIN_1, 0);
#if defined(AW20216S_CS_PIN_2)
aw20216s_update_pwm_buffers(AW20216S_CS_PIN_2, 1);
#endif
}
|
