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/* Copyright 2021 @ Keychron (https://www.keychron.com)
*
* 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 "ckled2001.h"
#include "i2c_master.h"
#include "wait.h"
#ifndef CKLED2001_TIMEOUT
# define CKLED2001_TIMEOUT 100
#endif
#ifndef CKLED2001_PERSISTENCE
# define CKLED2001_PERSISTENCE 0
#endif
#ifndef PHASE_CHANNEL
# define PHASE_CHANNEL MSKPHASE_12CHANNEL
#endif
// Transfer buffer for TWITransmitData()
uint8_t g_twi_transfer_buffer[20];
// These buffers match the CKLED2001 PWM registers.
// The control buffers match the PG0 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 CKLED2001_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[DRIVER_COUNT][192];
bool g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
uint8_t g_led_control_registers[DRIVER_COUNT][24] = {0};
bool g_led_control_registers_update_required[DRIVER_COUNT] = {false};
bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
// If the transaction fails function returns false.
g_twi_transfer_buffer[0] = reg;
g_twi_transfer_buffer[1] = data;
#if CKLED2001_PERSISTENCE > 0
for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
return false;
}
}
#else
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
return false;
}
#endif
return true;
}
bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
// Assumes PG1 is already selected.
// If any of the transactions fails function returns false.
// Transmit PWM registers in 12 transfers of 16 bytes.
// g_twi_transfer_buffer[] is 20 bytes
// Iterate over the pwm_buffer contents at 16 byte intervals.
for (int i = 0; i < 192; i += 16) {
g_twi_transfer_buffer[0] = i;
// Copy the data from i to i+15.
// Device will auto-increment register for data after the first byte
// Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
for (int j = 0; j < 16; j++) {
g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
}
#if CKLED2001_PERSISTENCE > 0
for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
return false;
}
}
#else
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
return false;
}
#endif
}
return true;
}
void CKLED2001_init(uint8_t addr) {
// Select to function page
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
// Setting LED driver to shutdown mode
CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
// Setting internal channel pulldown/pullup
CKLED2001_write_register(addr, PDU_REG, MSKSET_CA_CB_CHANNEL);
// Select number of scan phase
CKLED2001_write_register(addr, SCAN_PHASE_REG, PHASE_CHANNEL);
// Setting PWM Delay Phase
CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE1_REG, MSKPWM_DELAY_PHASE_ENABLE);
// Setting Driving/Sinking Channel Slew Rate
CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE2_REG, MSKDRIVING_SINKING_CHHANNEL_SLEWRATE_ENABLE);
// Setting Iref
CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_DISABLE);
// Set LED CONTROL PAGE (Page 0)
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
CKLED2001_write_register(addr, i, 0x00);
}
// Set PWM PAGE (Page 1)
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
CKLED2001_write_register(addr, i, 0x00);
}
// Set CURRENT PAGE (Page 4)
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, CURRENT_TUNE_PAGE);
for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
CKLED2001_write_register(addr, i, 0xFF);
}
// Enable LEDs ON/OFF
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
CKLED2001_write_register(addr, i, 0xFF);
}
// Select to function page
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
// Setting LED driver to normal mode
CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
}
void CKLED2001_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
if (index >= 0 && index < DRIVER_LED_TOTAL) {
ckled2001_led led = g_ckled2001_leds[index];
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 CKLED2001_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
CKLED2001_set_color(i, red, green, blue);
}
}
void CKLED2001_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
ckled2001_led led = g_ckled2001_leds[index];
uint8_t control_register_r = led.r / 8;
uint8_t control_register_g = led.g / 8;
uint8_t control_register_b = led.b / 8;
uint8_t bit_r = led.r % 8;
uint8_t bit_g = led.g % 8;
uint8_t bit_b = led.b % 8;
if (red) {
g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
} else {
g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
}
if (green) {
g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
} else {
g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
}
if (blue) {
g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
} else {
g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
}
g_led_control_registers_update_required[led.driver] = true;
}
void CKLED2001_update_pwm_buffers(uint8_t addr, uint8_t index) {
if (g_pwm_buffer_update_required[index]) {
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
// If any of the transactions fail we risk writing dirty PG0,
// refresh page 0 just in case.
if (!CKLED2001_write_pwm_buffer(addr, g_pwm_buffer[index])) {
g_led_control_registers_update_required[index] = true;
}
}
g_pwm_buffer_update_required[index] = false;
}
void CKLED2001_update_led_control_registers(uint8_t addr, uint8_t index) {
if (g_led_control_registers_update_required[index]) {
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
for (int i = 0; i < 24; i++) {
CKLED2001_write_register(addr, i, g_led_control_registers[index][i]);
}
}
g_led_control_registers_update_required[index] = false;
}
void CKLED2001_return_normal(uint8_t addr) {
// Select to function page
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
// Setting LED driver to normal mode
CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
}
void CKLED2001_shutdown(uint8_t addr) {
// Select to function page
CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
// Setting LED driver to shutdown mode
CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
// Write SW Sleep Register
CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_ENABLE);
}
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