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Kuba Birecki 2023-09-15 05:18:11 -07:00 • committed by GitHub
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1
app/drivers/CMakeLists.txt
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@ -3,5 +3,6 @@
add_subdirectory_ifdef(CONFIG_ZMK_DRIVERS_GPIO gpio) add_subdirectory_ifdef(CONFIG_ZMK_DRIVERS_GPIO gpio)
add_subdirectory(kscan) add_subdirectory(kscan)
add_subdirectory(led_strip)
add_subdirectory(sensor) add_subdirectory(sensor)
add_subdirectory(display) add_subdirectory(display)

1
app/drivers/Kconfig
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@ -3,5 +3,6 @@
rsource "gpio/Kconfig" rsource "gpio/Kconfig"
rsource "kscan/Kconfig" rsource "kscan/Kconfig"
rsource "led_strip/Kconfig"
rsource "sensor/Kconfig" rsource "sensor/Kconfig"
rsource "display/Kconfig" rsource "display/Kconfig"

4
app/drivers/led_strip/CMakeLists.txt Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
add_subdirectory_ifdef(CONFIG_IS31FL3741 is31fl3741)

4
app/drivers/led_strip/Kconfig Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
rsource "is31fl3741/Kconfig"

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app/drivers/led_strip/is31fl3741/CMakeLists.txt Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
zephyr_library()
zephyr_library_sources(is31fl3741.c)

15
app/drivers/led_strip/is31fl3741/Kconfig Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
config IS31FL3741
bool "IS31FL3741 LED Matrix driver"
depends on I2C
depends on LED_STRIP
help
Enable an IS31FL3741 LED Matrix driver.
The IS31FL3741 is a general purpose 39x9 LED Matrix programmed
via an I2C compatible interface. Each LED can be dimmed
individually with 8-bit PWM data and 8-bit scaling data which
allows 256 steps of linear PWM dimming and 256 steps of DC current
adjustable level.

269
app/drivers/led_strip/is31fl3741/is31fl3741.c Normal file
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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#define DT_DRV_COMPAT issi_is31fl3741
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/drivers/led_strip.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/sys/math_extras.h>
#include <zephyr/sys/util.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#define IS31FL3741_BUFFER_SIZE (39 * 9)
#define IS31FL3741_BUFFER_PAGE_BREAK (0xb4)
#define IS31FL3741_REG_PS (0xfd)
#define IS31FL3741_REG_PSWL (0xfe)
#define IS31FL3741_PSWL_ENABLE (0xc5)
#define IS31FL3741_PSWL_DISABLE (0x00)
#define IS31FL3741_PAGE_PWM_A (0x00)
#define IS31FL3741_PAGE_PWM_B (0x01)
#define IS31FL3741_PAGE_SCALING_A (0x02)
#define IS31FL3741_PAGE_SCALING_B (0x03)
#define IS31FL3741_PAGE_FUNCTION (0x04)
struct is31fl3741_config {
char *label;
struct i2c_dt_spec i2c;
struct gpio_dt_spec gpio;
size_t px_buffer_size;
uint8_t gcc;
uint8_t sws;
uint16_t *rgb_map;
uint8_t *gamma;
uint8_t scaling_red;
uint8_t scaling_blue;
uint8_t scaling_green;
};
struct is31fl3741_data {
uint8_t *px_buffer;
};
static int is31fl3741_reg_write(const struct device *dev, uint8_t addr, uint8_t value) {
const struct is31fl3741_config *config = dev->config;
if (i2c_reg_write_byte_dt(&config->i2c, addr, value)) {
LOG_ERR("Failed writing value %x to register address %x on device %x.", value, addr,
config->i2c.addr);
return -EIO;
}
return 0;
}
static int is31fl3741_reg_burst_write(const struct device *dev, uint8_t start_addr,
const uint8_t *buffer, size_t num_bytes) {
const struct is31fl3741_config *config = dev->config;
if (i2c_burst_write_dt(&config->i2c, start_addr, buffer, num_bytes)) {
LOG_ERR("Failed burst write with starting address %x", start_addr);
return -EIO;
}
return 0;
}
static int is31fl3741_set_page(const struct device *dev, uint8_t page_addr) {
if (is31fl3741_reg_write(dev, IS31FL3741_REG_PSWL, IS31FL3741_PSWL_ENABLE)) {
return -EIO;
}
if (is31fl3741_reg_write(dev, IS31FL3741_REG_PS, page_addr)) {
return -EIO;
}
return 0;
}
static inline bool num_pixels_ok(const struct is31fl3741_config *config, size_t num_pixels) {
size_t num_bytes;
const bool overflow = size_mul_overflow(num_pixels, 3, &num_bytes);
return !overflow && (num_bytes <= config->px_buffer_size);
}
/**
* Updates individual LED channels without an RGB interpretation.
*/
static int is31fl3741_strip_update_channels(const struct device *dev, uint8_t *channels,
size_t num_channels) {
const struct is31fl3741_config *config = dev->config;
LOG_ERR("UPDATING CHANNELS!");
if (config->px_buffer_size < num_channels) {
return -ENOMEM;
}
is31fl3741_set_page(dev, IS31FL3741_PAGE_PWM_A);
int result;
result = is31fl3741_reg_burst_write(dev, 0x00, channels,
(num_channels <= IS31FL3741_BUFFER_PAGE_BREAK)
? num_channels
: IS31FL3741_BUFFER_PAGE_BREAK);
if (result || num_channels <= IS31FL3741_BUFFER_PAGE_BREAK) {
return result;
}
is31fl3741_set_page(dev, IS31FL3741_PAGE_PWM_B);
return is31fl3741_reg_burst_write(dev, 0x00, channels + 0xb4, num_channels - 0xb4);
}
/*
* Updates the RGB LED matrix according to devicetree's map property.
*/
static int is31fl3741_strip_update_rgb(const struct device *dev, struct led_rgb *pixels,
size_t num_pixels) {
const struct is31fl3741_config *config = dev->config;
struct is31fl3741_data *data = dev->data;
size_t i = 0;
size_t j = 0;
if (!num_pixels_ok(config, num_pixels)) {
return -ENOMEM;
}
while (i < num_pixels) {
data->px_buffer[config->rgb_map[j++]] = config->gamma[pixels[i].r];
data->px_buffer[config->rgb_map[j++]] = config->gamma[pixels[i].g];
data->px_buffer[config->rgb_map[j++]] = config->gamma[pixels[i].b];
++i;
}
return is31fl3741_strip_update_channels(dev, data->px_buffer, config->px_buffer_size);
}
/*
* Initiates a driver instance for IS31FL3741.
*
* SDB is pulled high to enable chip operation followed
* by a reset to clear out all previous values.
*
* Function and scaling registers are then pre-configured based on devicetree settings.
*/
int static is31fl3741_init(const struct device *dev) {
const struct is31fl3741_config *config = dev->config;
const struct is31fl3741_data *data = dev->data;
if (!device_is_ready(config->i2c.bus)) {
LOG_ERR("I2C device %s not ready", config->i2c.bus->name);
return -ENODEV;
}
if (!device_is_ready(config->gpio.port)) {
LOG_ERR("GPIO device for %s is not ready", config->label);
return -ENODEV;
}
if (gpio_pin_configure_dt(&config->gpio, GPIO_OUTPUT)) {
LOG_ERR("SDB pin for %s cannot be configured", config->label);
return -EIO;
}
if (gpio_pin_set_dt(&config->gpio, 1)) {
LOG_ERR("SDB pin for %s cannot be pulled high", config->label);
return -EIO;
}
// Set configuration registers
if (is31fl3741_set_page(dev, IS31FL3741_PAGE_FUNCTION)) {
LOG_ERR("Couldn't switch to function registers on %s", config->label);
return -EIO;
}
// Reset
is31fl3741_reg_write(dev, 0x3f, 0xae); // Reset
// Re-set configuration registers
if (is31fl3741_set_page(dev, IS31FL3741_PAGE_FUNCTION)) {
LOG_ERR("Couldn't switch to function registers on %s", config->label);
return -EIO;
}
// Configure LED driver operation mode
is31fl3741_reg_write(dev, 0x00,
(config->sws << 4) | (0x01 << 3) | 0x01); // SWS, H logic, Normal operation
is31fl3741_reg_write(dev, 0x01, config->gcc); // Set GCC
// Set scaling registers
uint8_t *px_buffer = data->px_buffer;
uint16_t *rgb_map = config->rgb_map;
for (int i = 0; i < config->px_buffer_size; i += 3) {
px_buffer[rgb_map[i]] = config->scaling_red;
px_buffer[rgb_map[i + 1]] = config->scaling_green;
px_buffer[rgb_map[i + 2]] = config->scaling_blue;
}
is31fl3741_set_page(dev, IS31FL3741_PAGE_SCALING_A);
is31fl3741_reg_burst_write(dev, 0x00, px_buffer, 0xb4);
is31fl3741_set_page(dev, IS31FL3741_PAGE_SCALING_B);
is31fl3741_reg_burst_write(dev, 0x00, px_buffer + 0xb4, 0xab);
// Re-initialize px_buffer to prevent any scaling values from being sent
// to PWM registers during normal operation.
for (size_t i = 0; i < config->px_buffer_size; ++i) {
px_buffer[i] = 0;
}
return 0;
}
static const struct led_strip_driver_api is31fl3741_api = {
.update_rgb = is31fl3741_strip_update_rgb,
.update_channels = is31fl3741_strip_update_channels,
};
#define IS31FL3741_GCC(idx) \
(DT_INST_PROP(idx, r_ext) * DT_INST_PROP(idx, led_max_current) * 256 * 256) / (383 * 255)
#define IS31FL3741_DEVICE(idx) \
\
static uint8_t is31fl3741_##idx##_px_buffer[IS31FL3741_BUFFER_SIZE]; \
\
static struct is31fl3741_data is31fl3741_##idx##_data = { \
.px_buffer = is31fl3741_##idx##_px_buffer, \
}; \
\
static uint16_t is31fl3741_##idx##_rgb_map[IS31FL3741_BUFFER_SIZE] = DT_INST_PROP(idx, map); \
\
static uint8_t is31fl3741_##idx##_gamma[] = DT_INST_PROP(idx, gamma); \
\
static const struct is31fl3741_config is31fl3741_##idx##_config = { \
.label = DT_INST_PROP(idx, label), \
.i2c = I2C_DT_SPEC_INST_GET(idx), \
.gpio = GPIO_DT_SPEC_INST_GET(idx, sdb_gpios), \
.px_buffer_size = IS31FL3741_BUFFER_SIZE, \
.gcc = IS31FL3741_GCC(idx), \
.sws = DT_INST_PROP(idx, sw_setting), \
.rgb_map = is31fl3741_##idx##_rgb_map, \
.gamma = is31fl3741_##idx##_gamma, \
.scaling_red = DT_INST_PROP(idx, red_scaling), \
.scaling_green = DT_INST_PROP(idx, green_scaling), \
.scaling_blue = DT_INST_PROP(idx, blue_scaling), \
}; \
\
DEVICE_DT_INST_DEFINE(idx, &is31fl3741_init, NULL, &is31fl3741_##idx##_data, \
&is31fl3741_##idx##_config, POST_KERNEL, CONFIG_LED_STRIP_INIT_PRIORITY, \
&is31fl3741_api);
DT_INST_FOREACH_STATUS_OKAY(IS31FL3741_DEVICE);

350
app/dts/bindings/led_strip/issi,is31fl3741.yaml Normal file
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# Copyright (c) 2020, The ZMK Contributors
# SPDX-License-Identifier: MIT
description: ISSI IS31FL3741 LED Matrix driver
compatible: "issi,is31fl3741"
include: i2c-device.yaml
properties:
sw-setting:
type: int
required: false
enum:
- 0x00
- 0x01
- 0x02
- 0x03
- 0x04
- 0x05
- 0x06
- 0x07
- 0x08
default: 0x00
description: |
SW setting used to control the matrix size by turning off SWx pins
as described in the datasheet.
map:
type: array
required: true
description: |
Configure how RGB pixels are mapped to individual pixel registers.
r-ext:
type: int
required: true
description: Rext resistor value in kiloohms.
led-max-current:
type: int
required: true
description: Maximum allowed LED current in mAh. The maximum allowed by the chip is 38.
sdb-gpios:
type: phandle-array
required: true
description: |
GPIO pin for hardware shutdown functionality.
chain-length:
type: int
required: true
description: |
How many RGB LEDs are driven by the IC.
red-scaling:
type: int
required: false
default: 255
description: |
Red channel scaling factor on a scale of 0-255.
This setting adjusts the brightness of red pixels relative to other channels by scaling the amount
of current flowing through them. 255 being equivalent to the value of led-max-current.
green-scaling:
type: int
required: false
default: 255
description: |
Green channel scaling factor on a scale of 0-255.
This setting adjusts the brightness of green pixels relative to other channels by scaling the amount
of current flowing through them. 255 being equivalent to the value of led-max-current.
blue-scaling:
type: int
required: false
default: 255
description: |
Blue channel scaling factor on a scale of 0-255.
This setting adjusts the brightness of blue pixels relative to other channels by scaling the amount
of current flowing through them. 255 being equivalent to the value of led-max-current.
gamma:
type: array
required: false
description: |
Gamma correction lookup values.
The gamma values make the LED brightness seem more linear to human eyes.
Default values match the recommendation from the IC datasheet but note this may
or may not work for your particular LEDs.
default:
[
0,
0,
0,
0,
1,
1,
1,
1,
2,
2,
2,
2,
3,
3,
3,
3,
4,
4,
4,
4,
5,
5,
5,
5,
6,
6,
6,
6,
7,
7,
7,
7,
8,
8,
8,
8,
10,
10,
10,
10,
12,
12,
12,
12,
14,
14,
14,
14,
16,
16,
16,
16,
18,
18,
18,
18,
20,
20,
20,
20,
22,
22,
22,
22,
24,
24,
24,
24,
26,
26,
26,
26,
29,
29,
29,
29,
32,
32,
32,
32,
35,
35,
35,
35,
38,
38,
38,
38,
41,
41,
41,
41,
44,
44,
44,
44,
47,
47,
47,
47,
50,
50,
50,
50,
53,
53,
53,
53,
57,
57,
57,
57,
61,
61,
61,
61,
65,
65,
65,
65,
69,
69,
69,
69,
73,
73,
73,
73,
77,
77,
77,
77,
81,
81,
81,
81,
85,
85,
85,
85,
89,
89,
89,
89,
94,
94,
94,
94,
99,
99,
99,
99,
104,
104,
104,
104,
109,
109,
109,
109,
114,
114,
114,
114,
119,
119,
119,
119,
124,
124,
124,
124,
129,
129,
129,
129,
134,
134,
134,
134,
140,
140,
140,
140,
146,
146,
146,
146,
152,
152,
152,
152,
158,
158,
158,
158,
164,
164,
164,
164,
170,
170,
170,
170,
176,
176,
176,
176,
182,
182,
182,
182,
188,
188,
188,
188,
195,
195,
195,
195,
202,
202,
202,
202,
209,
209,
209,
209,
216,
216,
216,
216,
223,
223,
223,
223,
230,
230,
230,
230,
237,
237,
237,
237,
244,
244,
244,
244,
251,
251,
251,
251,
255,
255,
255,
255,
]

17
app/include/dt-bindings/zmk/issi_transform.h Normal file
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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
/**
* Maps a 39x9 matrix cell index to a 1D array matching IS31FL3741's PWN registers order.
*/
#define PIXEL(n) \
((((n) % 39) < 30) ? ((((n) / 39) * 30) + ((n) % 39)) \
: (270 + (((n) / 39) * 9) + ((n) % 39) - 30))
#define RGB(com, r, g, b) PIXEL(com + r) PIXEL(com + g) PIXEL(com + b)
#define SW(n) ((n - 1) * 39)
#define CS(n) (n - 1)