238 lines
8.6 KiB
C
238 lines
8.6 KiB
C
/* 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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#include "ckled2001.h"
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#include "i2c_master.h"
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#include "wait.h"
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#ifndef CKLED2001_TIMEOUT
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# define CKLED2001_TIMEOUT 100
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#endif
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#ifndef CKLED2001_PERSISTENCE
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# define CKLED2001_PERSISTENCE 0
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#endif
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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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// Transfer buffer for TWITransmitData()
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uint8_t g_twi_transfer_buffer[20];
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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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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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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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#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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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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// 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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#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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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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// 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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// Set CURRENT PAGE (Page 4)
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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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switch (i) {
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case 2:
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case 5:
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case 8:
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case 11:
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CKLED2001_write_register(addr, i, 0xA0);
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break;
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default:
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CKLED2001_write_register(addr, i, 0xFF);
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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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// 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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void CKLED2001_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
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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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g_pwm_buffer[led.driver][led.r] = red;
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g_pwm_buffer[led.driver][led.g] = green;
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g_pwm_buffer[led.driver][led.b] = blue;
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g_pwm_buffer_update_required[led.driver] = true;
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}
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}
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void CKLED2001_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
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for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
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CKLED2001_set_color(i, red, green, blue);
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}
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}
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void CKLED2001_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
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ckled2001_led led;
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memcpy_P(&led, (&g_ckled2001_leds[index]), sizeof(led));
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uint8_t control_register_r = led.r / 8;
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uint8_t control_register_g = led.g / 8;
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uint8_t control_register_b = led.b / 8;
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uint8_t bit_r = led.r % 8;
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uint8_t bit_g = led.g % 8;
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uint8_t bit_b = led.b % 8;
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if (red) {
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g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
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} else {
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g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
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}
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if (green) {
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g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
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} else {
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g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
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}
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if (blue) {
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g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
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} else {
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g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
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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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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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// 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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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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void CKLED2001_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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void CKLED2001_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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