forked from forks/qmk_firmware
00596d55e3
* Added support for the upcomming Lets_split vitamins included * Updated readme * Corrected header of readme * Enabled RGB * Broke everything * broke some more shit * Revert "broke some more shit" This reverts commit6ad68e6269. * Revert "Broke everything" This reverts commitfeeee4e40d. * Fixed USB detection, and RGB on slave * started modifying readme, to use msys2 * Added support for the upcomming Lets_split vitamins included * Updated readme * Corrected header of readme * Enabled RGB * Broke everything * broke some more shit * Revert "broke some more shit" This reverts commit6ad68e6269. * Revert "Broke everything" This reverts commitfeeee4e40d. * Fixed USB detection, and RGB on slave * started modifying readme, to use msys2 * Updated readme to reflect use of msys2 Added avrdude to msys path * added avrdude option to msys installer * Removed extra installation of avrdude * Renamed to vitamins_included and implemented drashnas changes * Fixed include guard * Fixed some includes, and added avrdude target to docs. * Fixed default keyboard
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#ifndef I2C_H
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#define I2C_H
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#include <stdint.h>
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#include "split_util.h"
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#ifndef F_CPU
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#define F_CPU 16000000UL
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#endif
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#define I2C_READ 1
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#define I2C_WRITE 0
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#define I2C_ACK 1
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#define I2C_NACK 0
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#define SLAVE_BUFFER_SIZE 0x10
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// i2c SCL clock frequency
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#define SCL_CLOCK 400000L
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extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
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void i2c_master_init(void);
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uint8_t i2c_master_start(uint8_t address);
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void i2c_master_stop(void);
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uint8_t i2c_master_write(uint8_t data);
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uint8_t i2c_master_read(int);
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void i2c_reset_state(void);
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void i2c_slave_init(uint8_t address);
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static inline unsigned char i2c_start_read(unsigned char addr) {
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return i2c_master_start((addr << 1) | I2C_READ);
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}
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static inline unsigned char i2c_start_write(unsigned char addr) {
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return i2c_master_start((addr << 1) | I2C_WRITE);
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}
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// from SSD1306 scrips
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extern unsigned char i2c_rep_start(unsigned char addr);
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extern void i2c_start_wait(unsigned char addr);
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extern unsigned char i2c_readAck(void);
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extern unsigned char i2c_readNak(void);
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extern unsigned char i2c_read(unsigned char ack);
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#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak();
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#endif
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