--- /dev/null
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ *
+ * 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/>.
+ */
+
+#ifdef __AVR__
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#else
+#include "wait.h"
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include "is31fl3731-simple.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:
+// 0b1110100 AD <-> GND
+// 0b1110111 AD <-> VCC
+// 0b1110101 AD <-> SCL
+// 0b1110110 AD <-> SDA
+#define ISSI_ADDR_DEFAULT 0x74
+
+#define ISSI_REG_CONFIG 0x00
+#define ISSI_REG_CONFIG_PICTUREMODE 0x00
+#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08
+#define ISSI_REG_CONFIG_AUDIOPLAYMODE 0x18
+
+#define ISSI_CONF_PICTUREMODE 0x00
+#define ISSI_CONF_AUTOFRAMEMODE 0x04
+#define ISSI_CONF_AUDIOMODE 0x08
+
+#define ISSI_REG_PICTUREFRAME 0x01
+
+#define ISSI_REG_SHUTDOWN 0x0A
+#define ISSI_REG_AUDIOSYNC 0x06
+
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_BANK_FUNCTIONREG 0x0B // helpfully called 'page nine'
+
+#ifndef ISSI_TIMEOUT
+ #define ISSI_TIMEOUT 100
+#endif
+
+#ifndef ISSI_PERSISTENCE
+ #define ISSI_PERSISTENCE 0
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
+// 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 IS31FL3731_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[DRIVER_COUNT][144];
+bool g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[DRIVER_COUNT][18] = { { 0 }, { 0 } };
+bool g_led_control_registers_update_required = false;
+
+// This is the bit pattern in the LED control registers
+// (for matrix A, add one to register for matrix B)
+//
+// reg - b7 b6 b5 b4 b3 b2 b1 b0
+// 0x00 - R08,R07,R06,R05,R04,R03,R02,R01
+// 0x02 - G08,G07,G06,G05,G04,G03,G02,R00
+// 0x04 - B08,B07,B06,B05,B04,B03,G01,G00
+// 0x06 - - , - , - , - , - ,B02,B01,B00
+// 0x08 - - , - , - , - , - , - , - , -
+// 0x0A - B17,B16,B15, - , - , - , - , -
+// 0x0C - G17,G16,B14,B13,B12,B11,B10,B09
+// 0x0E - R17,G15,G14,G13,G12,G11,G10,G09
+// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
+
+
+void IS31FL3731_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
+}
+
+void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+ // assumes bank is already selected
+
+ // transmit PWM registers in 9 transfers of 16 bytes
+ // g_twi_transfer_buffer[] is 20 bytes
+
+ // iterate over the pwm_buffer contents at 16 byte intervals
+ for (int i = 0; i < 144; i += 16) {
+ // set the first register, e.g. 0x24, 0x34, 0x44, etc.
+ g_twi_transfer_buffer[0] = 0x24 + i;
+ // copy the data from i to i+15
+ // device will auto-increment register for data after the first byte
+ // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
+ for (int j = 0; j < 16; j++) {
+ g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
+ }
+
+ #if ISSI_PERSISTENCE > 0
+ for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+ if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0)
+ break;
+ }
+ #else
+ i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT);
+ #endif
+ }
+}
+
+void IS31FL3731_init(uint8_t addr) {
+ // In order to avoid the LEDs being driven with garbage data
+ // in the LED driver's PWM registers, first enable software shutdown,
+ // then set up the mode and other settings, clear the PWM registers,
+ // then disable software shutdown.
+
+ // select "function register" bank
+ IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+ // enable software shutdown
+ IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+ // this delay was copied from other drivers, might not be needed
+ // FIXME: Don't we have a wrapper for this already?
+ #ifdef __AVR__
+ _delay_ms(10);
+ #else
+ wait_ms(10);
+ #endif
+
+ // picture mode
+ IS31FL3731_write_register(addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE);
+ // display frame 0
+ IS31FL3731_write_register(addr, ISSI_REG_PICTUREFRAME, 0x00);
+ // audio sync off
+ IS31FL3731_write_register(addr, ISSI_REG_AUDIOSYNC, 0x00);
+
+ // select bank 0
+ IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+
+ // turn off all LEDs in the LED control register
+ for (int i = 0x00; i <= 0x11; i++) {
+ IS31FL3731_write_register(addr, i, 0x00);
+ }
+
+ // turn off all LEDs in the blink control register (not really needed)
+ for (int i = 0x12; i <= 0x23; i++) {
+ IS31FL3731_write_register(addr, i, 0x00);
+ }
+
+ // set PWM on all LEDs to 0
+ for (int i = 0x24; i <= 0xB3; i++) {
+ IS31FL3731_write_register(addr, i, 0x00);
+ }
+
+ // select "function register" bank
+ IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+ // disable software shutdown
+ IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x01);
+
+ // select bank 0 and leave it selected.
+ // most usage after initialization is just writing PWM buffers in bank 0
+ // as there's not much point in double-buffering
+ IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+
+}
+
+void IS31FL3731_set_value(int index, uint8_t value) {
+ if (index >= 0 && index < DRIVER_LED_TOTAL) {
+ is31_led led = g_is31_leds[index];
+
+ // Subtract 0x24 to get the second index of g_pwm_buffer
+ g_pwm_buffer[led.driver][led.v - 0x24] = value;
+ g_pwm_buffer_update_required = true;
+ }
+}
+
+void IS31FL3731_set_value_all(uint8_t value) {
+ for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
+ IS31FL3731_set_value(i, value);
+ }
+}
+
+void IS31FL3731_set_led_control_register(uint8_t index, bool value) {
+ is31_led led = g_is31_leds[index];
+
+ uint8_t control_register = (led.v - 0x24) / 8;
+ uint8_t bit_value = (led.v - 0x24) % 8;
+
+ if (value) {
+ g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+ } else {
+ g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+ }
+
+ g_led_control_registers_update_required = true;
+}
+
+void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
+ if (g_pwm_buffer_update_required) {
+ IS31FL3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
+ g_pwm_buffer_update_required = false;
+ }
+}
+
+void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index) {
+ if (g_led_control_registers_update_required) {
+ for (int i=0; i<18; i++) {
+ IS31FL3731_write_register(addr, i, g_led_control_registers[index][i]);
+ }
+ }
+}
projects / qmk_firmware.git / blobdiff