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- /* Copyright 2018 Jason Williams (Wilba)
- * Copyright 2021 Jamal Bouajjaj (Electro707)
- *
- * 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 "is31fl3236.h"
- #include "i2c_master.h"
-
- // This is the full 8-bit address
- #define ISSI_DEFAULT_ADDRESS 0b0111100
-
- // These are the register addresses
- #define ISSI_REG_SHUTDOWN 0x00
- #define ISSI_REG_PWM 0x01
- #define ISSI_REG_CONTROL 0x26
- #define ISSI_REG_UPDATE 0x25
- #define ISSI_REG_RESET 0x4F
- #define ISSI_REG_G_CONTROL 0x4A
- #define ISSI_REG_FREQ 0x4B
-
- // Default timeout if no I2C response
- #define ISSI_TIMEOUT 100
-
- // Reusable buffer for transfers
- uint8_t g_twi_transfer_buffer[40];
-
- // IS31FL3236 has 36 PWM outputs.
- // If used as RGB LED driver, LEDs are assigned RGB,RGB,RGB,RGB,RGB,RGB
- // The RGB handling is done in user space
- uint8_t g_pwm_buffer[36];
- bool g_pwm_buffer_update_required = false;
- uint8_t g_led_control_registers[36];
- bool g_led_control_update_required = false;
-
- void IS31FL3236_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
- g_twi_transfer_buffer[0] = reg;
- g_twi_transfer_buffer[1] = data;
- i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
- }
-
- void IS31FL3236_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
- g_twi_transfer_buffer[0] = ISSI_REG_PWM;
- for (int i = 0; i < 36; i++) {
- g_twi_transfer_buffer[1 + i] = pwm_buffer[i];
- }
-
- i2c_transmit(addr << 1, g_twi_transfer_buffer, 37, ISSI_TIMEOUT);
- }
-
- void IS31FL3236_write_led_control_buffer(uint8_t addr, uint8_t *led_control_buffer) {
- g_twi_transfer_buffer[0] = ISSI_REG_CONTROL;
- for (int i = 0; i < 36; i++) {
- g_twi_transfer_buffer[1 + i] = led_control_buffer[i];
- }
-
- i2c_transmit(addr << 1, g_twi_transfer_buffer, 37, ISSI_TIMEOUT);
- }
-
- void IS31FL3236_init(uint8_t addr) {
- // In case we ever want to reinitialize (?)
- IS31FL3236_write_register(addr, ISSI_REG_RESET, 0x00);
-
- // Turn off software shutdown
- IS31FL3236_write_register(addr, ISSI_REG_SHUTDOWN, 0x01);
-
- // Set all PWM values to zero
- for (uint8_t i = 0; i < 36; i++) {
- IS31FL3236_write_register(addr, ISSI_REG_PWM + i, 0x00);
- }
-
- // Enable all channels
- for (uint8_t i = 0; i < 36; i++) {
- // Set each LED to half current and enable them
- // TODO: Set an option to change the current drive thru a calling function
- IS31FL3236_write_register(addr, ISSI_REG_CONTROL + i, 0b001);
- }
-
- // Load PWM registers and LED Control register data
- IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
- }
-
- void IS31FL3236_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
- is31_led led;
- memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
-
- g_pwm_buffer[led.r] = red;
- g_pwm_buffer[led.g] = green;
- g_pwm_buffer[led.b] = blue;
- g_pwm_buffer_update_required = true;
- }
-
- void IS31FL3236_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
- for (int i = 0; i < 6; i++) {
- IS31FL3236_set_color(i, red, green, blue);
- }
- }
-
- void IS31FL3236_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
- is31_led led;
- memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
-
- g_led_control_registers[led.r] = red;
- g_led_control_registers[led.g] = green;
- g_led_control_registers[led.b] = blue;
- g_led_control_update_required = true;
- }
-
- void IS31FL3236_update_pwm_buffers(uint8_t addr) {
- if (g_pwm_buffer_update_required) {
- IS31FL3236_write_pwm_buffer(addr, g_pwm_buffer);
- // Load PWM registers and LED Control register data
- IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
- }
- g_pwm_buffer_update_required = false;
- }
-
- void IS31FL3236_update_led_control_registers(uint8_t addr) {
- if (g_led_control_update_required) {
- IS31FL3236_write_led_control_buffer(addr, g_led_control_registers);
- // Load PWM registers and LED Control register data
- IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
- }
- g_led_control_update_required = false;
- }
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