219 lines
8 KiB
C
219 lines
8 KiB
C
/* Copyright 2017 Jason Williams
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* Copyright 2018 Jack Humbert
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* Copyright 2018 Yiancar
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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 "is31fl3737-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 IS31FL3737_COMMANDREGISTER 0xFD
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#define IS31FL3737_COMMANDREGISTER_WRITELOCK 0xFE
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#define IS31FL3737_INTERRUPTMASKREGISTER 0xF0
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#define IS31FL3737_INTERRUPTSTATUSREGISTER 0xF1
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#define IS31FL3737_PAGE_LEDCONTROL 0x00 // PG0
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#define IS31FL3737_PAGE_PWM 0x01 // PG1
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#define IS31FL3737_PAGE_AUTOBREATH 0x02 // PG2
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#define IS31FL3737_PAGE_FUNCTION 0x03 // PG3
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#define IS31FL3737_REG_CONFIGURATION 0x00 // PG3
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#define IS31FL3737_REG_GLOBALCURRENT 0x01 // PG3
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#define IS31FL3737_REG_RESET 0x11 // PG3
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#define IS31FL3737_REG_SWPULLUP 0x0F // PG3
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#define IS31FL3737_REG_CSPULLUP 0x10 // PG3
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#ifndef IS31FL3737_I2C_TIMEOUT
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# define IS31FL3737_I2C_TIMEOUT 100
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#endif
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#ifndef IS31FL3737_I2C_PERSISTENCE
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# define IS31FL3737_I2C_PERSISTENCE 0
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#endif
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#ifndef IS31FL3737_PWM_FREQUENCY
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# define IS31FL3737_PWM_FREQUENCY IS31FL3737_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3737B only
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#endif
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#ifndef IS31FL3737_SWPULLUP
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# define IS31FL3737_SWPULLUP IS31FL3737_PUR_0R
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#endif
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#ifndef IS31FL3737_CSPULLUP
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# define IS31FL3737_CSPULLUP IS31FL3737_PUR_0R
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#endif
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#ifndef IS31FL3737_GLOBALCURRENT
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# define IS31FL3737_GLOBALCURRENT 0xFF
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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 IS31FL3737 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 is31fl3737_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[IS31FL3737_DRIVER_COUNT][192];
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bool g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
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uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][24] = {0};
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bool g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT] = {false};
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void is31fl3737_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 IS31FL3737_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3737_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, 2, IS31FL3737_I2C_TIMEOUT);
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#endif
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}
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void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
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// assumes PG1 is already selected
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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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memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16);
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#if IS31FL3737_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3737_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, IS31FL3737_I2C_TIMEOUT);
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#endif
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}
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}
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void is31fl3737_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, shutdown is enabled last.
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// Set up the mode and other settings, clear the PWM registers,
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// then disable software shutdown.
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// Unlock the command register.
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
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// Select PG0
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_LEDCONTROL);
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// Turn off all LEDs.
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for (int i = 0x00; i <= 0x17; i++) {
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is31fl3737_write_register(addr, i, 0x00);
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}
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// Unlock the command register.
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
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// Select PG1
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_PWM);
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// Set PWM on all LEDs to 0
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// No need to setup Breath registers to PWM as that is the default.
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for (int i = 0x00; i <= 0xBF; i++) {
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is31fl3737_write_register(addr, i, 0x00);
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}
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// Unlock the command register.
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
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// Select PG3
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_FUNCTION);
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// Set de-ghost pull-up resistors (SWx)
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is31fl3737_write_register(addr, IS31FL3737_REG_SWPULLUP, IS31FL3737_SWPULLUP);
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// Set de-ghost pull-down resistors (CSx)
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is31fl3737_write_register(addr, IS31FL3737_REG_CSPULLUP, IS31FL3737_CSPULLUP);
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// Set global current to maximum.
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is31fl3737_write_register(addr, IS31FL3737_REG_GLOBALCURRENT, IS31FL3737_GLOBALCURRENT);
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// Disable software shutdown.
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is31fl3737_write_register(addr, IS31FL3737_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
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// Wait 10ms to ensure the device has woken up.
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wait_ms(10);
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}
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void is31fl3737_set_value(int index, uint8_t value) {
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is31_led led;
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if (index >= 0 && index < LED_MATRIX_LED_COUNT) {
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memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
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if (g_pwm_buffer[led.driver][led.v] == value) {
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return;
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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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void is31fl3737_set_value_all(uint8_t value) {
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for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) {
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is31fl3737_set_value(i, value);
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}
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}
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void is31fl3737_set_led_control_register(uint8_t index, bool value) {
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is31_led led;
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memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
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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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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 is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
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if (g_pwm_buffer_update_required[index]) {
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// Firstly we need to unlock the command register and select PG1
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_PWM);
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is31fl3737_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 is31fl3737_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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// Firstly we need to unlock the command register and select PG0
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
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is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_LEDCONTROL);
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for (int i = 0; i < 24; i++) {
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is31fl3737_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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