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+/* Copyright 2021 @ Keychron (https://www.keychron.com)
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include "ckled2001-simple.h"
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+#include "i2c_master.h"
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+#include "wait.h"
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+
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+#ifndef CKLED2001_TIMEOUT
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+# define CKLED2001_TIMEOUT 100
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+#endif
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+
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+#ifndef CKLED2001_PERSISTENCE
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+# define CKLED2001_PERSISTENCE 0
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+#endif
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+
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+#ifndef PHASE_CHANNEL
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+# define PHASE_CHANNEL MSKPHASE_12CHANNEL
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+#endif
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+
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+#ifndef CKLED2001_CURRENT_TUNE
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+# define CKLED2001_CURRENT_TUNE \
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+ { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
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+#endif
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+
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+// Transfer buffer for TWITransmitData()
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+uint8_t g_twi_transfer_buffer[20];
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+
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+// These buffers match the CKLED2001 PWM registers.
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+// The control buffers match the PG0 LED On/Off registers.
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+// Storing them like this is optimal for I2C transfers to the registers.
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+// We could optimize this and take out the unused registers from these
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+// buffers and the transfers in CKLED2001_write_pwm_buffer() but it's
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+// probably not worth the extra complexity.
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+uint8_t g_pwm_buffer[DRIVER_COUNT][192];
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+bool g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
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+
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+uint8_t g_led_control_registers[DRIVER_COUNT][24] = {0};
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+bool g_led_control_registers_update_required[DRIVER_COUNT] = {false};
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+
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+bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
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+ // If the transaction fails function returns false.
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+ g_twi_transfer_buffer[0] = reg;
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+ g_twi_transfer_buffer[1] = data;
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+
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+#if CKLED2001_PERSISTENCE > 0
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+ for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
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+ if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
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+ return false;
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+ }
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+ }
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+#else
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+ if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
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+ return false;
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+ }
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+#endif
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+ return true;
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+}
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+
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+bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
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+ // Assumes PG1 is already selected.
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+ // If any of the transactions fails function returns false.
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+ // Transmit PWM registers in 12 transfers of 16 bytes.
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+ // g_twi_transfer_buffer[] is 20 bytes
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+
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+ // Iterate over the pwm_buffer contents at 16 byte intervals.
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+ for (int i = 0; i < 192; i += 16) {
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+ g_twi_transfer_buffer[0] = i;
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+ // Copy the data from i to i+15.
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+ // Device will auto-increment register for data after the first byte
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+ // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
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+ for (int j = 0; j < 16; j++) {
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+ g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
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+ }
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+
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+#if CKLED2001_PERSISTENCE > 0
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+ for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
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+ if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
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+ return false;
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+ }
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+ }
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+#else
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+ if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
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+ return false;
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+ }
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+#endif
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+ }
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+ return true;
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+}
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+
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+void CKLED2001_init(uint8_t addr) {
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+ // Select to function page
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
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+ // Setting LED driver to shutdown mode
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+ CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
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+ // Setting internal channel pulldown/pullup
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+ CKLED2001_write_register(addr, PDU_REG, MSKSET_CA_CB_CHANNEL);
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+ // Select number of scan phase
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+ CKLED2001_write_register(addr, SCAN_PHASE_REG, PHASE_CHANNEL);
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+ // Setting PWM Delay Phase
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+ CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE1_REG, MSKPWM_DELAY_PHASE_ENABLE);
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+ // Setting Driving/Sinking Channel Slew Rate
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+ CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE2_REG, MSKDRIVING_SINKING_CHHANNEL_SLEWRATE_ENABLE);
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+ // Setting Iref
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+ CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_DISABLE);
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+ // Set LED CONTROL PAGE (Page 0)
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
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+ for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
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+ CKLED2001_write_register(addr, i, 0x00);
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+ }
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+
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+ // Set PWM PAGE (Page 1)
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
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+ for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
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+ CKLED2001_write_register(addr, i, 0x00);
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+ }
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+
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+ // Set CURRENT PAGE (Page 4)
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+ uint8_t current_tuen_reg_list[LED_CURRENT_TUNE_LENGTH] = CKLED2001_CURRENT_TUNE;
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, CURRENT_TUNE_PAGE);
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+ for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
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+ CKLED2001_write_register(addr, i, current_tuen_reg_list[i]);
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+ }
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+
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+ // Enable LEDs ON/OFF
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
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+ for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
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+ CKLED2001_write_register(addr, i, 0xFF);
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+ }
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+
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+ // Select to function page
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
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+ // Setting LED driver to normal mode
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+ CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
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+}
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+
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+void CKLED2001_set_value(int index, uint8_t value) {
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+ ckled2001_led led;
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+ if (index >= 0 && index < DRIVER_LED_TOTAL) {
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+ memcpy_P(&led, (&g_ckled2001_leds[index]), sizeof(led));
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+
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+ g_pwm_buffer[led.driver][led.v] = value;
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+ g_pwm_buffer_update_required[led.driver] = true;
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+ }
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+}
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+
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+void CKLED2001_set_value_all(uint8_t value) {
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+ for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
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+ CKLED2001_set_value(i, value);
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+ }
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+}
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+
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+void CKLED2001_set_led_control_register(uint8_t index, bool value) {
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+ ckled2001_led led;
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+ memcpy_P(&led, (&g_ckled2001_leds[index]), sizeof(led));
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+
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+ uint8_t control_register = led.v / 8;
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+ uint8_t bit_value = led.v % 8;
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+
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+ if (value) {
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+ g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
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+ } else {
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+ g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
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+ }
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+
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+ g_led_control_registers_update_required[led.driver] = true;
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+}
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+
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+void CKLED2001_update_pwm_buffers(uint8_t addr, uint8_t index) {
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+ if (g_pwm_buffer_update_required[index]) {
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
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+
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+ // If any of the transactions fail we risk writing dirty PG0,
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+ // refresh page 0 just in case.
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+ if (!CKLED2001_write_pwm_buffer(addr, g_pwm_buffer[index])) {
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+ g_led_control_registers_update_required[index] = true;
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+ }
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+ }
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+ g_pwm_buffer_update_required[index] = false;
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+}
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+
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+void CKLED2001_update_led_control_registers(uint8_t addr, uint8_t index) {
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+ if (g_led_control_registers_update_required[index]) {
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
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+ for (int i = 0; i < 24; i++) {
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+ CKLED2001_write_register(addr, i, g_led_control_registers[index][i]);
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+ }
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+ }
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+ g_led_control_registers_update_required[index] = false;
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+}
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+
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+void CKLED2001_sw_return_normal(uint8_t addr) {
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+ // Select to function page
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
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+ // Setting LED driver to normal mode
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+ CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
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+}
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+
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+void CKLED2001_sw_shutdown(uint8_t addr) {
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+ // Select to function page
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+ CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
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+ // Setting LED driver to shutdown mode
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+ CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
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+ // Write SW Sleep Register
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+ CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_ENABLE);
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+}
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