240 lines
8.6 KiB
C
240 lines
8.6 KiB
C
/* Copyright 2017 Jason Williams
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* Copyright 2018 Jack Humbert
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* Copyright 2019 Clueboard
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* Copyright 2021 Doni Crosby
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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 "is31fl3731-simple.h"
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#include <string.h>
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#include "i2c_master.h"
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#include "wait.h"
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#define IS31FL3731_PWM_REGISTER_COUNT 144
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#define IS31FL3731_LED_CONTROL_REGISTER_COUNT 18
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#ifndef IS31FL3731_I2C_TIMEOUT
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# define IS31FL3731_I2C_TIMEOUT 100
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#endif
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#ifndef IS31FL3731_I2C_PERSISTENCE
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# define IS31FL3731_I2C_PERSISTENCE 0
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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 IS31FL3731 PWM registers 0x24-0xB3.
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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 is31fl3731_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[IS31FL3731_DRIVER_COUNT][IS31FL3731_PWM_REGISTER_COUNT];
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bool g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};
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uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
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bool g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT] = {false};
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void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
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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 IS31FL3731_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT) == 0) {
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break;
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}
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}
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#else
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT);
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#endif
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}
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void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
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// assumes bank is already selected
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// transmit PWM registers in 9 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 < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
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// set the first register, e.g. 0x24, 0x34, 0x44, etc.
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g_twi_transfer_buffer[0] = 0x24 + 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 0x24-0x33, 0x34-0x43, etc. in one transfer
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memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16);
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#if IS31FL3731_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT) == 0) break;
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}
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#else
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT);
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#endif
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}
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}
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void is31fl3731_init_drivers(void) {
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i2c_init();
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is31fl3731_init(IS31FL3731_I2C_ADDRESS_1);
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#if defined(IS31FL3731_I2C_ADDRESS_2)
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is31fl3731_init(IS31FL3731_I2C_ADDRESS_2);
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# if defined(IS31FL3731_I2C_ADDRESS_3)
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is31fl3731_init(IS31FL3731_I2C_ADDRESS_3);
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# if defined(IS31FL3731_I2C_ADDRESS_4)
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is31fl3731_init(IS31FL3731_I2C_ADDRESS_4);
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# endif
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# endif
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#endif
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for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
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is31fl3731_set_led_control_register(i, true);
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}
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is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_1, 0);
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#if defined(IS31FL3731_I2C_ADDRESS_2)
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is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_2, 1);
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# if defined(IS31FL3731_I2C_ADDRESS_3)
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is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_3, 2);
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# if defined(IS31FL3731_I2C_ADDRESS_4)
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is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_4, 3);
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# endif
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# endif
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#endif
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}
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void is31fl3731_init(uint8_t addr) {
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// In order to avoid the LEDs being driven with garbage data
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// in the LED driver's PWM registers, first enable software shutdown,
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// then set up the mode and other settings, clear the PWM registers,
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// then disable software shutdown.
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// select "function register" bank
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is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FUNCTION);
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// enable software shutdown
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
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#ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
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#endif
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// this delay was copied from other drivers, might not be needed
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wait_ms(10);
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// picture mode
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
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// display frame 0
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
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// audio sync off
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
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// select bank 0
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is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FRAME_1);
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// turn off all LEDs in the LED control register
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for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3731_write_register(addr, i, 0x00);
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}
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// turn off all LEDs in the blink control register (not really needed)
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for (int i = 0x12; i <= 0x23; i++) {
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is31fl3731_write_register(addr, i, 0x00);
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}
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// set PWM on all LEDs to 0
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for (int i = 0x24; i <= 0xB3; i++) {
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is31fl3731_write_register(addr, i, 0x00);
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}
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// select "function register" bank
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is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FUNCTION);
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// disable software shutdown
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is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
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// select bank 0 and leave it selected.
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// most usage after initialization is just writing PWM buffers in bank 0
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// as there's not much point in double-buffering
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is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, IS31FL3731_COMMAND_FRAME_1);
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}
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void is31fl3731_set_value(int index, uint8_t value) {
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is31fl3731_led_t led;
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if (index >= 0 && index < IS31FL3731_LED_COUNT) {
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memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
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// Subtract 0x24 to get the second index of g_pwm_buffer
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if (g_pwm_buffer[led.driver][led.v - 0x24] == value) {
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return;
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}
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g_pwm_buffer[led.driver][led.v - 0x24] = 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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void is31fl3731_set_value_all(uint8_t value) {
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for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
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is31fl3731_set_value(i, value);
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}
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}
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void is31fl3731_set_led_control_register(uint8_t index, bool value) {
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is31fl3731_led_t led;
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memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
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uint8_t control_register = (led.v - 0x24) / 8;
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uint8_t bit_value = (led.v - 0x24) % 8;
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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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g_led_control_registers_update_required[led.driver] = true;
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}
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void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
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if (g_pwm_buffer_update_required[index]) {
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is31fl3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
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g_pwm_buffer_update_required[index] = false;
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}
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}
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void is31fl3731_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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for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3731_write_register(addr, i, g_led_control_registers[index][i]);
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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 is31fl3731_flush(void) {
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is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_1, 0);
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#if defined(IS31FL3731_I2C_ADDRESS_2)
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is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_2, 1);
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# if defined(IS31FL3731_I2C_ADDRESS_3)
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is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_3, 2);
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# if defined(IS31FL3731_I2C_ADDRESS_4)
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is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_4, 3);
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# endif
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# endif
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#endif
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}
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