move drivers around

common_features.mk

@@ -20,6 +20,7 @@ SERIAL_SRC += $(wildcard $(SERIAL_PATH)/system/*.c)
 SERIAL_DEFS += -DSERIAL_LINK_ENABLE
 COMMON_VPATH += $(SERIAL_PATH)
 
+COMMON_VPATH += $(DRIVER_PATH)
 ifeq ($(PLATFORM),AVR)
   COMMON_VPATH += $(DRIVER_PATH)/avr
 else

drivers/avr/i2c_master.h

@@ -1,22 +0,0 @@
-/* Library made by: g4lvanix
- * Github repository: https://github.com/g4lvanix/I2C-master-lib
- */
-
-#ifndef I2C_MASTER_H
-#define I2C_MASTER_H
-
-#define I2C_READ 0x01
-#define I2C_WRITE 0x00
-
-void i2c_init(void);
-uint8_t i2c_start(uint8_t address);
-uint8_t i2c_write(uint8_t data);
-uint8_t i2c_read_ack(void);
-uint8_t i2c_read_nack(void);
-uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length);
-uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length);
-uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
-uint8_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
-void i2c_stop(void);
-
-#endif // I2C_MASTER_H

drivers/avr/is31fl3731.c

@@ -1,244 +0,0 @@
-/* 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 "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'
-
-// 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;
-
-	//Transmit data until succesful
-	while(i2c_transmit(addr << 1, g_twi_transfer_buffer,2) != 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
-
-	// 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];
-		}
-
-		//Transmit buffer until succesful
-		while(i2c_transmit(addr << 1, g_twi_transfer_buffer,17) != 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] );
-		}
-	}
-}
-

drivers/avr/is31fl3731.h

@@ -1,214 +0,0 @@
-/* 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/>.
- */
-
-
-#ifndef IS31FL3731_DRIVER_H
-#define IS31FL3731_DRIVER_H
-
-#include <stdint.h>
-#include <stdbool.h>
-
-typedef struct is31_led {
-	uint8_t driver:2;
-  uint8_t r;
-  uint8_t g;
-  uint8_t b;
-} __attribute__((packed)) is31_led;
-
-extern const is31_led g_is31_leds[DRIVER_LED_TOTAL];
-
-void IS31FL3731_init( uint8_t addr );
-void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data );
-void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
-
-void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
-void IS31FL3731_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
-
-void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, bool blue );
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
-void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
-
-#define C1_1  0x24
-#define C1_2  0x25
-#define C1_3  0x26
-#define C1_4  0x27
-#define C1_5  0x28
-#define C1_6  0x29
-#define C1_7  0x2A
-#define C1_8  0x2B
-
-#define C1_9  0x2C
-#define C1_10 0x2D
-#define C1_11 0x2E
-#define C1_12 0x2F
-#define C1_13 0x30
-#define C1_14 0x31
-#define C1_15 0x32
-#define C1_16 0x33
-
-#define C2_1  0x34
-#define C2_2  0x35
-#define C2_3  0x36
-#define C2_4  0x37
-#define C2_5  0x38
-#define C2_6  0x39
-#define C2_7  0x3A
-#define C2_8  0x3B
-
-#define C2_9  0x3C
-#define C2_10 0x3D
-#define C2_11 0x3E
-#define C2_12 0x3F
-#define C2_13 0x40
-#define C2_14 0x41
-#define C2_15 0x42
-#define C2_16 0x43
-
-#define C3_1  0x44
-#define C3_2  0x45
-#define C3_3  0x46
-#define C3_4  0x47
-#define C3_5  0x48
-#define C3_6  0x49
-#define C3_7  0x4A
-#define C3_8  0x4B
-
-#define C3_9  0x4C
-#define C3_10 0x4D
-#define C3_11 0x4E
-#define C3_12 0x4F
-#define C3_13 0x50
-#define C3_14 0x51
-#define C3_15 0x52
-#define C3_16 0x53
-
-#define C4_1  0x54
-#define C4_2  0x55
-#define C4_3  0x56
-#define C4_4  0x57
-#define C4_5  0x58
-#define C4_6  0x59
-#define C4_7  0x5A
-#define C4_8  0x5B
-
-#define C4_9  0x5C
-#define C4_10 0x5D
-#define C4_11 0x5E
-#define C4_12 0x5F
-#define C4_13 0x60
-#define C4_14 0x61
-#define C4_15 0x62
-#define C4_16 0x63
-
-#define C5_1  0x64
-#define C5_2  0x65
-#define C5_3  0x66
-#define C5_4  0x67
-#define C5_5  0x68
-#define C5_6  0x69
-#define C5_7  0x6A
-#define C5_8  0x6B
-
-#define C5_9  0x6C
-#define C5_10 0x6D
-#define C5_11 0x6E
-#define C5_12 0x6F
-#define C5_13 0x70
-#define C5_14 0x71
-#define C5_15 0x72
-#define C5_16 0x73
-
-#define C6_1  0x74
-#define C6_2  0x75
-#define C6_3  0x76
-#define C6_4  0x77
-#define C6_5  0x78
-#define C6_6  0x79
-#define C6_7  0x7A
-#define C6_8  0x7B
-
-#define C6_9  0x7C
-#define C6_10 0x7D
-#define C6_11 0x7E
-#define C6_12 0x7F
-#define C6_13 0x80
-#define C6_14 0x81
-#define C6_15 0x82
-#define C6_16 0x83
-
-#define C7_1  0x84
-#define C7_2  0x85
-#define C7_3  0x86
-#define C7_4  0x87
-#define C7_5  0x88
-#define C7_6  0x89
-#define C7_7  0x8A
-#define C7_8  0x8B
-
-#define C7_9  0x8C
-#define C7_10 0x8D
-#define C7_11 0x8E
-#define C7_12 0x8F
-#define C7_13 0x90
-#define C7_14 0x91
-#define C7_15 0x92
-#define C7_16 0x93
-
-#define C8_1  0x94
-#define C8_2  0x95
-#define C8_3  0x96
-#define C8_4  0x97
-#define C8_5  0x98
-#define C8_6  0x99
-#define C8_7  0x9A
-#define C8_8  0x9B
-
-#define C8_9  0x9C
-#define C8_10 0x9D
-#define C8_11 0x9E
-#define C8_12 0x9F
-#define C8_13 0xA0
-#define C8_14 0xA1
-#define C8_15 0xA2
-#define C8_16 0xA3
-
-#define C9_1  0xA4
-#define C9_2  0xA5
-#define C9_3  0xA6
-#define C9_4  0xA7
-#define C9_5  0xA8
-#define C9_6  0xA9
-#define C9_7  0xAA
-#define C9_8  0xAB
-
-#define C9_9  0xAC
-#define C9_10 0xAD
-#define C9_11 0xAE
-#define C9_12 0xAF
-#define C9_13 0xB0
-#define C9_14 0xB1
-#define C9_15 0xB2
-#define C9_16 0xB3
-
-
-
-#endif // IS31FL3731_DRIVER_H

drivers/avr/i2c_master.c

@@ -5,44 +5,44 @@
 #include <avr/io.h>
 #include <util/twi.h>
 
-#include "i2c_master.h"
+#include "twi2c.h"
 
 #define F_SCL 400000UL // SCL frequency
 #define Prescaler 1
 #define TWBR_val ((((F_CPU / F_SCL) / Prescaler) - 16 ) / 2)
 
-void i2c_init(void)
+void twi2c_init(void)
 {
 	TWBR = (uint8_t)TWBR_val;
 }
 
-uint8_t i2c_start(uint8_t address)
+uint8_t twi2c_start(uint8_t address)
 {
 	// reset TWI control register
 	TWCR = 0;
-	// transmit START condition 
+	// transmit START condition
 	TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
 	// wait for end of transmission
 	while( !(TWCR & (1<<TWINT)) );
-	
+
 	// check if the start condition was successfully transmitted
 	if((TWSR & 0xF8) != TW_START){ return 1; }
-	
+
 	// load slave address into data register
 	TWDR = address;
 	// start transmission of address
 	TWCR = (1<<TWINT) | (1<<TWEN);
 	// wait for end of transmission
 	while( !(TWCR & (1<<TWINT)) );
-	
+
 	// check if the device has acknowledged the READ / WRITE mode
 	uint8_t twst = TW_STATUS & 0xF8;
 	if ( (twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK) ) return 1;
-	
+
 	return 0;
 }
 
-uint8_t i2c_write(uint8_t data)
+uint8_t twi2c_write(uint8_t data)
 {
 	// load data into data register
 	TWDR = data;
@@ -50,26 +50,26 @@ uint8_t i2c_write(uint8_t data)
 	TWCR = (1<<TWINT) | (1<<TWEN);
 	// wait for end of transmission
 	while( !(TWCR & (1<<TWINT)) );
-	
+
 	if( (TWSR & 0xF8) != TW_MT_DATA_ACK ){ return 1; }
-	
+
 	return 0;
 }
 
-uint8_t i2c_read_ack(void)
+uint8_t twi2c_read_ack(void)
 {
-	
+
 	// start TWI module and acknowledge data after reception
-	TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA); 
+	TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
 	// wait for end of transmission
 	while( !(TWCR & (1<<TWINT)) );
 	// return received data from TWDR
 	return TWDR;
 }
 
-uint8_t i2c_read_nack(void)
+uint8_t twi2c_read_nack(void)
 {
-	
+
 	// start receiving without acknowledging reception
 	TWCR = (1<<TWINT) | (1<<TWEN);
 	// wait for end of transmission
@@ -78,71 +78,71 @@ uint8_t i2c_read_nack(void)
 	return TWDR;
 }
 
-uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length)
+uint8_t twi2c_transmit(uint8_t address, uint8_t* data, uint16_t length)
 {
-	if (i2c_start(address | I2C_WRITE)) return 1;
-	
+	if (twi2c_start(address | I2C_WRITE)) return 1;
+
 	for (uint16_t i = 0; i < length; i++)
 	{
-		if (i2c_write(data[i])) return 1;
+		if (twi2c_write(data[i])) return 1;
 	}
-	
-	i2c_stop();
-	
+
+	twi2c_stop();
+
 	return 0;
 }
 
-uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length)
+uint8_t twi2c_receive(uint8_t address, uint8_t* data, uint16_t length)
 {
-	if (i2c_start(address | I2C_READ)) return 1;
-	
+	if (twi2c_start(address | I2C_READ)) return 1;
+
 	for (uint16_t i = 0; i < (length-1); i++)
 	{
-		data[i] = i2c_read_ack();
+		data[i] = twi2c_read_ack();
 	}
-	data[(length-1)] = i2c_read_nack();
-	
-	i2c_stop();
-	
+	data[(length-1)] = twi2c_read_nack();
+
+	twi2c_stop();
+
 	return 0;
 }
 
-uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length)
+uint8_t twi2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length)
 {
-	if (i2c_start(devaddr | 0x00)) return 1;
+	if (twi2c_start(devaddr | 0x00)) return 1;
 
-	i2c_write(regaddr);
+	twi2c_write(regaddr);
 
 	for (uint16_t i = 0; i < length; i++)
 	{
-		if (i2c_write(data[i])) return 1;
+		if (twi2c_write(data[i])) return 1;
 	}
 
-	i2c_stop();
+	twi2c_stop();
 
 	return 0;
 }
 
-uint8_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length)
+uint8_t twi2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length)
 {
-	if (i2c_start(devaddr)) return 1;
+	if (twi2c_start(devaddr)) return 1;
 
-	i2c_write(regaddr);
+	twi2c_write(regaddr);
 
-	if (i2c_start(devaddr | 0x01)) return 1;
+	if (twi2c_start(devaddr | 0x01)) return 1;
 
 	for (uint16_t i = 0; i < (length-1); i++)
 	{
-		data[i] = i2c_read_ack();
+		data[i] = twi2c_read_ack();
 	}
-	data[(length-1)] = i2c_read_nack();
+	data[(length-1)] = twi2c_read_nack();
 
-	i2c_stop();
+	twi2c_stop();
 
 	return 0;
 }
 
-void i2c_stop(void)
+void twi2c_stop(void)
 {
 	// transmit STOP condition
 	TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);

drivers/avr/twi2c.h

@@ -0,0 +1,22 @@
+/* Library made by: g4lvanix
+ * Github repository: https://github.com/g4lvanix/I2C-master-lib
+ */
+
+#ifndef TWI2C_H
+#define TWI2C_H
+
+#define I2C_READ 0x01
+#define I2C_WRITE 0x00
+
+void twi2c_init(void);
+uint8_t twi2c_start(uint8_t address);
+uint8_t twi2c_write(uint8_t data);
+uint8_t twi2c_read_ack(void);
+uint8_t twi2c_read_nack(void);
+uint8_t twi2c_transmit(uint8_t address, uint8_t* data, uint16_t length);
+uint8_t twi2c_receive(uint8_t address, uint8_t* data, uint16_t length);
+uint8_t twi2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
+uint8_t twi2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
+void twi2c_stop(void);
+
+#endif // I2C_MASTER_H