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is31fl3733 Driver

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This commit is contained in:
cameron 2020-12-29 12:43:33 -08:00
parent d207c3c30f
commit 6e6858b399
6 changed files with 226 additions and 0 deletions
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4
app/drivers/led/CMakeLists.txt Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
add_subdirectory_ifdef(CONFIG_IS31FL3733 is31fl3733)

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app/drivers/led/Kconfig Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
rsource "is31fl3733/Kconfig"

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app/drivers/led/is31fl3733/CMakeLists.txt Normal file
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# Copyright (c) 2020 The ZMK Contributors
# SPDX-License-Identifier: MIT
zephyr_library()
zephyr_library_sources(is31fl3733.c)

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app/drivers/led/is31fl3733/Kconfig Normal file
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# Copyright (c) 2020 Cameron Banna
config IS31FL3733
bool "IS31FL3733 LED driver"
depends on I2C
help
Enable LED driver for IS31FL3733.
The IS31FL3733 is a general purpose 12 by 16 LED
matrix driver with 1/12 cycle rate. The device can be
programmed via an I2C compatible interface. Each
LED can be dimmed individually with 8-bit PWM data
which allowing 256 steps of linear dimming
config LED_INIT_PRIORITY
int "LED initialization priority"
default 90
help
System initialization priority for LED drivers.

183
app/drivers/led/is31fl3733/is31fl3733.c Normal file
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/*
* Copyright (c) 2020 Cameron Banna.
*/
#define DT_DRV_COMPAT issi_is31fl3733
/*
* "SUMMARY"
*/
#include <drivers/i2c.h>
#include <drivers/led.h>
#include <sys/util.h>
#include <zephyr.h>
#define LOG_LEVEL CONFIG_LED_LOG_LEVEL
#include <logging/log.h>
LOG_MODULE_REGISTER(is31fl3733);
/** Number of CS lines. */
#define IS31FL3733_CS (16)
/** Number of SW lines. */
#define IS31FL3733_SW (12)
/** IS31FL3733 common registers. */
#define IS31FL3733_PSR (0xFD) ///< Page select register. Write only.
#define IS31FL3733_PSWL (0xFE) ///< Page select register write lock. Read/Write.
/** Registers in Page 0. */
#define IS31FL3733_LEDONOFF (0x0000) /// ON or OFF state control for each LED. Write only.
#define IS31FL3733_LEDOPEN (0x0018) /// Open state for each LED. Read only.
#define IS31FL3733_LEDSHORT (0x0030) /// Short state for each LED. Read only.
/** Registers in Page 1. */
#define IS31FL3733_LEDPWM (0x0100) /// PWM duty for each LED. Write only.
/** Registers in Page 3. */
#define IS31FL3733_CR (0x0300) /// Configuration Register. Write only.
#define IS31FL3733_RESET (0x0311) /// Reset register. Read only.
/** PSWL register bits. */
#define IS31FL3733_PSWL_DISABLE (0x00) /// Disable write to Page Select register.
#define IS31FL3733_PSWL_ENABLE (0xC5) /// Enable write to Page select register.
struct is31fl3733_config {
int reg;
int inst;
char *bus_name;
};
struct is31fl3733_data {
const struct device *i2c;
};
uint8_t leds[IS31FL3733_SW * IS31FL3733_CS / 8];
static int is31fl3733_set_page(const struct device *dev, uint16_t addr){
const struct is31fl3733_data *dev_data = dev->data;
const struct is31fl3733_config *dev_cfg = dev->config;
if (i2c_reg_write_byte(dev_data->i2c, dev_cfg->reg, IS31FL3733_PSWL, IS31FL3733_PSWL_ENABLE)){
LOG_ERR("Enable write to Page select register failed");
return -EIO;
}
if (i2c_reg_write_byte(dev_data->i2c, dev_cfg->reg, IS31FL3733_PSR, addr)){
LOG_ERR("Writing to Page select register failed");
return -EIO;
}
return 0;
}
static int is31fl3733_write_page_reg(const struct device *dev, uint8_t reg, uint8_t buffer){
const struct is31fl3733_data *dev_data = dev->data;
const struct is31fl3733_config *dev_cfg = dev->config;
if (i2c_reg_write_byte(dev_data->i2c, dev_cfg->reg, reg, buffer)){
LOG_ERR("Writing Page Failed");
return -EIO;
}
return 0;
}
static int is31fl3733_led_set_brightness(const struct device *dev, uint32_t led, uint8_t value){
uint8_t cs = led - ((led / 16) * 16);
uint8_t sw = led / 16;
uint8_t offset = sw * IS31FL3733_CS + cs;
// Set page to 0x01 PWM Page
is31fl3733_set_page(dev, 0x01);
is31fl3733_write_page_reg(dev, offset, value);
return 0;
}
static inline int is31fl3733_led_on(const struct device *dev, uint32_t led){
uint8_t cs = led - ((led / 16) * 16);
uint8_t sw = led / 16;
uint8_t offset = (sw << 1) + (cs / 8);
leds[offset] |= 0x01 << (cs % 8);
// Set page to 0x01 Led Control Page
is31fl3733_set_page(dev, 0x00);
is31fl3733_write_page_reg(dev, offset, leds[offset]);
return 0;
}
static inline int is31fl3733_led_off(const struct device *dev, uint32_t led){
uint8_t cs = led - ((led / 16) * 16);
uint8_t sw = led / 16;
uint8_t offset = (sw << 1) + (cs / 8);
leds[offset] &= ~(0x01 << (cs % 8));
// Set page to 0x01 Led Control Page
is31fl3733_set_page(dev, 0x00);
is31fl3733_write_page_reg(dev, offset, leds[offset]);
return 0;
}
static int is31fl3733_led_set_color(const struct device *dev,uint32_t led, uint8_t num_of_colors, const uint8_t *colors){
uint8_t cs = led - ((led / 16) * 16);
uint8_t sw = (led / 16) * 3;
uint8_t offset_red = sw * IS31FL3733_CS + cs;
uint8_t offset_green = (sw + 1) * IS31FL3733_CS + cs;
uint8_t offset_blue = (sw + 2) * IS31FL3733_CS + cs;
// Set page to 0x01 PWM Page
is31fl3733_set_page(dev, 0x01);
is31fl3733_write_page_reg(dev, offset_red, colors[0]);
is31fl3733_write_page_reg(dev, offset_green, colors[1]);
is31fl3733_write_page_reg(dev, offset_blue, colors[2]);
return 0;
}
static int is31fl3733_led_reset(const struct device *dev){
const struct is31fl3733_data *data = dev->data;
const struct is31fl3733_config *dev_cfg = dev->config;
if (i2c_reg_write_byte(data->i2c, dev_cfg->reg, IS31FL3733_PSWL, IS31FL3733_PSWL_ENABLE)){
LOG_ERR("Enable write to Page select register failed");
return -EIO;
}
uint8_t partA = (uint8_t)((IS31FL3733_RESET & 0xFF00) >> 8);
uint8_t partB = (uint8_t)(IS31FL3733_RESET & 0x00FF);
uint8_t tx_buf[2] = {IS31FL3733_PSR, partA};
// Sequence to reset the IC
if (i2c_write(data->i2c,tx_buf, 2, dev_cfg->reg)){
LOG_ERR("Reseting Device Failed");
return -EIO;
}
uint8_t tx_buf2[1] = {partB};
if (i2c_write(data->i2c, tx_buf2, 1, dev_cfg->reg)){
LOG_ERR("Reseting Device Failed");
return -EIO;
}
if (i2c_read(data->i2c, NULL, 1, dev_cfg->reg)){
LOG_ERR("Reseting Device Failed");
return -EIO;
}
// Set Page to 0x03 Function page
is31fl3733_set_page(dev, 0x03);
// use the write page reg function to set the config
// register to 0x00 and set the value to 0x01 for normal
// operation, this can also be set to 0x01 for software
// shutdown mode. see page 17 & 18 of datasheet
is31fl3733_write_page_reg(dev, 0x00, 0x01);
return 0;
}
static int is31fl3733_led_init(const struct device *dev){
const struct is31fl3733_config *dev_cfg = dev->config;
struct is31fl3733_data *dev_data = dev->data;
dev_data->i2c = device_get_binding(dev_cfg->bus_name);
if (dev_data->i2c == NULL) {
LOG_DBG("Failed to get I2C device");
return -EINVAL;
}
is31fl3733_led_reset(dev);
// Set the Global Current Control, would like to pull this
// value from the device tree eventually
is31fl3733_write_page_reg(dev, 0x03, 0x01);
uint8_t GCC = 255;
is31fl3733_write_page_reg(dev, 0x01, GCC);
return 0;
}
static const struct led_driver_api is31fl3733_led_api = {
.on = is31fl3733_led_on,
.off = is31fl3733_led_off,
.set_brightness = is31fl3733_led_set_brightness,
.set_color = is31fl3733_led_set_color,
};
#define IS31FL3733_INIT(inst) \
static struct is31fl3733_data is31fl3733_led_data_##inst; \
static const struct is31fl3733_config is31fl3733_config_##inst = { \
.bus_name = DT_INST_BUS_LABEL(inst), \
.reg = DT_INST_REG_ADDR(inst), \
}; \
DEVICE_AND_API_INIT(is31fl3733_led##inst, DT_INST_LABEL(inst), \
&is31fl3733_led_init, &is31fl3733_led_data_##inst, \
&is31fl3733_config_##inst, POST_KERNEL, CONFIG_LED_INIT_PRIORITY, \
&is31fl3733_led_api);
DT_INST_FOREACH_STATUS_OKAY(IS31FL3733_INIT)

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app/drivers/zephyr/dts/bindings/led/is31fl3733/issi,is31fl3733.yaml Normal file
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description: |
Driver for the is31fl3733 LED driver
compatible: "issi,is31fl3733"
properties:
label:
required: true
type: string