/* Copyright 2017 Jason Williams * Copyright 2018 Jack Humbert * Copyright 2018 Yiancar * Copyright 2020 MelGeek * * 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 "wait.h" #include "is31fl3741.h" #include <string.h> #include "i2c_master.h" #include "progmem.h" // This is a 7-bit address, that gets left-shifted and bit 0 // set to 0 for write, 1 for read (as per I2C protocol) // The address will vary depending on your wiring: // 00 <-> GND // 01 <-> SCL // 10 <-> SDA // 11 <-> VCC // ADDR1 represents A1:A0 of the 7-bit address. // ADDR2 represents A3:A2 of the 7-bit address. // The result is: 0b101(ADDR2)(ADDR1) #define ISSI_ADDR_DEFAULT 0x60 #define ISSI_COMMANDREGISTER 0xFD #define ISSI_COMMANDREGISTER_WRITELOCK 0xFE #define ISSI_INTERRUPTMASKREGISTER 0xF0 #define ISSI_INTERRUPTSTATUSREGISTER 0xF1 #define ISSI_IDREGISTER 0xFC #define ISSI_PAGE_PWM0 0x00 // PG0 #define ISSI_PAGE_PWM1 0x01 // PG1 #define ISSI_PAGE_SCALING_0 0x02 // PG2 #define ISSI_PAGE_SCALING_1 0x03 // PG3 #define ISSI_PAGE_FUNCTION 0x04 // PG4 #define ISSI_REG_CONFIGURATION 0x00 // PG4 #define ISSI_REG_GLOBALCURRENT 0x01 // PG4 #define ISSI_REG_PULLDOWNUP 0x02 // PG4 #define ISSI_REG_RESET 0x3F // PG4 #ifndef ISSI_TIMEOUT # define ISSI_TIMEOUT 100 #endif #ifndef ISSI_PERSISTENCE # define ISSI_PERSISTENCE 0 #endif #define ISSI_MAX_LEDS 351 // Transfer buffer for TWITransmitData() uint8_t g_twi_transfer_buffer[20] = {0xFF}; // These buffers match the IS31FL3741 and IS31FL3741A PWM registers. // The scaling buffers match the PG2 and PG3 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 IS31FL3741_write_pwm_buffer() but it's // probably not worth the extra complexity. uint8_t g_pwm_buffer[DRIVER_COUNT][ISSI_MAX_LEDS]; bool g_pwm_buffer_update_required[DRIVER_COUNT] = {false}; bool g_scaling_registers_update_required[DRIVER_COUNT] = {false}; uint8_t g_scaling_registers[DRIVER_COUNT][ISSI_MAX_LEDS]; void IS31FL3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) { g_twi_transfer_buffer[0] = reg; g_twi_transfer_buffer[1] = data; #if ISSI_PERSISTENCE > 0 for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0) break; } #else i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT); #endif } bool IS31FL3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { // unlock the command register and select PG2 IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM0); for (int i = 0; i < 342; i += 18) { if (i == 180) { // unlock the command register and select PG2 IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM1); } g_twi_transfer_buffer[0] = i % 180; memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 18); #if ISSI_PERSISTENCE > 0 for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, ISSI_TIMEOUT) != 0) { return false; } } #else if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, ISSI_TIMEOUT) != 0) { return false; } #endif } // transfer the left cause the total number is 351 g_twi_transfer_buffer[0] = 162; memcpy(g_twi_transfer_buffer + 1, pwm_buffer + 342, 9); #if ISSI_PERSISTENCE > 0 for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, ISSI_TIMEOUT) != 0) { return false; } } #else if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, ISSI_TIMEOUT) != 0) { return false; } #endif return true; } void IS31FL3741_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. // Unlock the command register. // Unlock the command register. IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); // Select PG4 IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION); // Set to Normal operation IS31FL3741_write_register(addr, ISSI_REG_CONFIGURATION, 0x01); // Set Golbal Current Control Register IS31FL3741_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF); // Set Pull up & Down for SWx CSy IS31FL3741_write_register(addr, ISSI_REG_PULLDOWNUP, 0x77); // IS31FL3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF); // Wait 10ms to ensure the device has woken up. wait_ms(10); } void IS31FL3741_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) { if (index >= 0 && index < DRIVER_LED_TOTAL) { is31_led led = g_is31_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 IS31FL3741_set_color_all(uint8_t red, uint8_t green, uint8_t blue) { for (int i = 0; i < DRIVER_LED_TOTAL; i++) { IS31FL3741_set_color(i, red, green, blue); } } void IS31FL3741_set_led_control_register(uint8_t index, bool red, bool green, bool blue) { is31_led led = g_is31_leds[index]; if (red) { g_scaling_registers[led.driver][led.r] = 0xFF; } else { g_scaling_registers[led.driver][led.r] = 0x00; } if (green) { g_scaling_registers[led.driver][led.g] = 0xFF; } else { g_scaling_registers[led.driver][led.g] = 0x00; } if (blue) { g_scaling_registers[led.driver][led.b] = 0xFF; } else { g_scaling_registers[led.driver][led.b] = 0x00; } g_scaling_registers_update_required[led.driver] = true; } void IS31FL3741_update_pwm_buffers(uint8_t addr, uint8_t index) { if (g_pwm_buffer_update_required[index]) { IS31FL3741_write_pwm_buffer(addr, g_pwm_buffer[index]); } g_pwm_buffer_update_required[index] = false; } void IS31FL3741_set_pwm_buffer(const is31_led *pled, uint8_t red, uint8_t green, uint8_t blue) { g_pwm_buffer[pled->driver][pled->r] = red; g_pwm_buffer[pled->driver][pled->g] = green; g_pwm_buffer[pled->driver][pled->b] = blue; g_pwm_buffer_update_required[pled->driver] = true; } void IS31FL3741_update_led_control_registers(uint8_t addr, uint8_t index) { if (g_scaling_registers_update_required[index]) { // unlock the command register and select PG2 IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_SCALING_0); // CS1_SW1 to CS30_SW6 are on PG2 for (int i = CS1_SW1; i <= CS30_SW6; ++i) { IS31FL3741_write_register(addr, i, g_scaling_registers[0][i]); } // unlock the command register and select PG3 IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); IS31FL3741_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_SCALING_1); // CS1_SW7 to CS39_SW9 are on PG3 for (int i = CS1_SW7; i <= CS39_SW9; ++i) { IS31FL3741_write_register(addr, i - CS1_SW7, g_scaling_registers[0][i]); } g_scaling_registers_update_required[index] = false; } } void IS31FL3741_set_scaling_registers(const is31_led *pled, uint8_t red, uint8_t green, uint8_t blue) { g_scaling_registers[pled->driver][pled->r] = red; g_scaling_registers[pled->driver][pled->g] = green; g_scaling_registers[pled->driver][pled->b] = blue; g_scaling_registers_update_required[pled->driver] = true; }