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/* Copyright 2018 Jason Williams (Wilba)
* Copyright 2021 Doni Crosby
*
* 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 "is31fl3736-mono.h"
#include "i2c_master.h"
#include "wait.h"
#define IS31FL3736_PWM_REGISTER_COUNT 192 // actually 96
#define IS31FL3736_LED_CONTROL_REGISTER_COUNT 24
#ifndef IS31FL3736_I2C_TIMEOUT
# define IS31FL3736_I2C_TIMEOUT 100
#endif
#ifndef IS31FL3736_I2C_PERSISTENCE
# define IS31FL3736_I2C_PERSISTENCE 0
#endif
#ifndef IS31FL3736_PWM_FREQUENCY
# define IS31FL3736_PWM_FREQUENCY IS31FL3736_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3736B only
#endif
#ifndef IS31FL3736_SW_PULLUP
# define IS31FL3736_SW_PULLUP IS31FL3736_PUR_0_OHM
#endif
#ifndef IS31FL3736_CS_PULLDOWN
# define IS31FL3736_CS_PULLDOWN IS31FL3736_PDR_0_OHM
#endif
#ifndef IS31FL3736_GLOBAL_CURRENT
# define IS31FL3736_GLOBAL_CURRENT 0xFF
#endif
// These buffers match the IS31FL3736 PWM registers.
// The control buffers match the page 0 LED On/Off registers.
// Storing them like this is optimal for I2C transfers to the registers.
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
bool g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
bool g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT] = {false};
void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
#if IS31FL3736_I2C_PERSISTENCE > 0
for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT);
#endif
}
void is31fl3736_select_page(uint8_t addr, uint8_t page) {
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, page);
}
void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
// Assumes page 1 is already selected.
// Transmit PWM registers in 12 transfers of 16 bytes.
// Iterate over the pwm_buffer contents at 16 byte intervals.
for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3736_I2C_PERSISTENCE > 0
for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) {
if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
#endif
}
}
void is31fl3736_init_drivers(void) {
i2c_init();
is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
#if defined(IS31FL3736_I2C_ADDRESS_2)
is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
# if defined(IS31FL3736_I2C_ADDRESS_3)
is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
# if defined(IS31FL3736_I2C_ADDRESS_4)
is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
# endif
# endif
#endif
for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
is31fl3736_set_led_control_register(i, true);
}
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
#if defined(IS31FL3736_I2C_ADDRESS_2)
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
# if defined(IS31FL3736_I2C_ADDRESS_3)
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
# if defined(IS31FL3736_I2C_ADDRESS_4)
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
# endif
# endif
#endif
}
void is31fl3736_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.
is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
// Turn off all LEDs.
for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
is31fl3736_write_register(addr, i, 0x00);
}
is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
// Set PWM on all LEDs to 0
// No need to setup Breath registers to PWM as that is the default.
for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
is31fl3736_write_register(addr, i, 0x00);
}
is31fl3736_select_page(addr, IS31FL3736_COMMAND_FUNCTION);
// Set de-ghost pull-up resistors (SWx)
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
// Set de-ghost pull-down resistors (CSx)
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
// Set global current to maximum.
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
// Disable software shutdown.
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
// Wait 10ms to ensure the device has woken up.
wait_ms(10);
}
void is31fl3736_set_value(int index, uint8_t value) {
is31fl3736_led_t led;
if (index >= 0 && index < IS31FL3736_LED_COUNT) {
memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
if (g_pwm_buffer[led.driver][led.v] == value) {
return;
}
g_pwm_buffer[led.driver][led.v] = value;
g_pwm_buffer_update_required[led.driver] = true;
}
}
void is31fl3736_set_value_all(uint8_t value) {
for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
is31fl3736_set_value(i, value);
}
}
void is31fl3736_set_led_control_register(uint8_t index, bool value) {
is31fl3736_led_t led;
memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
// The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so:
// A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E
// B1=0x10 B2=0x12 B3=0x14
// But also, the LED control registers (0x00 to 0x17) are also interleaved, so:
// A1-A4=0x00 A5-A8=0x01
uint8_t control_register = led.v / 8;
uint8_t bit_value = led.v % 8;
if (value) {
g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
} else {
g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
}
g_led_control_registers_update_required[led.driver] = true;
}
void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
if (g_pwm_buffer_update_required[index]) {
is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
is31fl3736_write_pwm_buffer(addr, index);
g_pwm_buffer_update_required[index] = false;
}
}
void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
if (g_led_control_registers_update_required[index]) {
is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
}
g_led_control_registers_update_required[index] = false;
}
}
void is31fl3736_flush(void) {
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
#if defined(IS31FL3736_I2C_ADDRESS_2)
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
# if defined(IS31FL3736_I2C_ADDRESS_3)
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
# if defined(IS31FL3736_I2C_ADDRESS_4)
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
# endif
# endif
#endif
}
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