Adds IS31FL3731 RGB Matrix Implementation (#2910)

* adds is31fl3731 rgb matrix implementation

* fix build script for force pushes

* allow bootloader size to be overwritten

* adds planck light implementation

* split led config into 2 arrays

* idk

* betterize register handling

* update planck implementation

* update planck

* refine rgb interface

* cleanup names, rgb matrix

* start documentation

* finish up docs

* add effects list

* clean-up merge

* add RGB_MATRIX_SKIP_FRAMES

* add support for at90usb1286 to bootloader options

1 files changed, 258 insertions, 0 deletions

diff --git a/drivers/avr/is31fl3731.c b/drivers/avr/is31fl3731.c
new file mode 100644
index 0000000000..e5941cf41e
--- /dev/null
+++ b/drivers/avr/is31fl3731.c
@@ -0,0 +1,258 @@
+/* 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/>.
+ */
+
+#include "is31fl3731.h"
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include <string.h>
+#include "TWIlib.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'
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[TXMAXBUFLEN];
+
+// 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] = (addr << 1) | 0x00;
+	g_twi_transfer_buffer[1] = reg;
+	g_twi_transfer_buffer[2] = data;
+
+	// Set the error code to have no relevant information
+	TWIInfo.errorCode = TWI_NO_RELEVANT_INFO;
+	// Continuously attempt to transmit data until a successful transmission occurs
+	//while ( TWIInfo.errorCode != 0xFF )
+	//{
+		TWITransmitData( g_twi_transfer_buffer, 3, 0 );
+	//}
+}
+
+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
+
+	// set the I2C address
+	g_twi_transfer_buffer[0] = (addr << 1) | 0x00;
+
+	// 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[1] = 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[2 + j] = pwm_buffer[i + j];
+		}
+
+		// Set the error code to have no relevant information
+		TWIInfo.errorCode = TWI_NO_RELEVANT_INFO;
+		// Continuously attempt to transmit data until a successful transmission occurs
+		while ( TWIInfo.errorCode != 0xFF )
+		{
+			TWITransmitData( g_twi_transfer_buffer, 16 + 2, 0 );
+		}
+	}
+}
+
+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
+	_delay_ms( 10 );
+
+	// 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_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];
+
+		// Subtract 0x24 to get the second index of g_pwm_buffer
+		g_pwm_buffer[led.driver][led.r - 0x24] = red;
+		g_pwm_buffer[led.driver][led.g - 0x24] = green;
+		g_pwm_buffer[led.driver][led.b - 0x24] = blue;
+		g_pwm_buffer_update_required = true;
+	}
+}
+
+void IS31FL3731_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+	for ( int i = 0; i < DRIVER_LED_TOTAL; i++ )
+	{
+		IS31FL3731_set_color( i, red, green, blue );
+	}
+}
+
+void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, bool blue )
+{
+	is31_led led = g_is31_leds[index];
+
+  uint8_t control_register_r = (led.r - 0x24) / 8;
+  uint8_t control_register_g = (led.g - 0x24) / 8;
+  uint8_t control_register_b = (led.b - 0x24) / 8;
+  uint8_t bit_r = (led.r - 0x24) % 8;
+  uint8_t bit_g = (led.g - 0x24) % 8;
+  uint8_t bit_b = (led.b - 0x24) % 8;
+
+	if ( red ) {
+		g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
+	} else {
+		g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
+	}
+	if ( green ) {
+		g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
+	} else {
+		g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
+	}
+	if ( blue ) {
+		g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
+	} else {
+		g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
+	}
+
+	g_led_control_registers_update_required = true;
+
+
+}
+
+void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 )
+{
+	if ( g_pwm_buffer_update_required )
+	{
+		IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+		IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+	}
+	g_pwm_buffer_update_required = false;
+}
+
+void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 )
+{
+	if ( g_led_control_registers_update_required )
+	{
+		for ( int i=0; i<18; i++ )
+		{
+			IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] );
+			IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] );
+		}
+	}
+}
+