710937e4ef
* Fork from helix * Move rev2 to rev1 * Remove unused settings * Move split_util to outof rev * Setup KEYMAP for crkbd * Remove old image * Move keymaps directory and glcdfont.c * Remove AUDIO in keymap * Show keylog * Show keylogs * Show time log * Remove EISU/KANA * Use KEYMAP_kc * Remove iota_gfx_record_user wrapping * Remove unused settings for layer * Add keylogger.c * Fix uppercase letters to lower * Add timelogger.c * Default RGBLED_NUM = 27 * Remove unused setting * Add mode icon reader * Add matrix_write_ln * Add layer_state_reader * Move to lib directory * Rename functions * Add host_led_state_reader * Add logo_reader * Cleaning of iota_gfx_task * Fix bugs and add key defines * Remove unnecessary comments * Update crkbd readme * Move libs to lib directories * Rename KEYMAP to LAYOUT
50 lines
1.1 KiB
C
50 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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#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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