bceffdefca
* Fork from Let's Split * Organizing files * Delete some keymaps * I2C and serial enabled at the same time * Change readme * add #define HELIX_ROWS for multiple rows * Delete avrdude flashing script * Delete makefiles * Subproject elimination * Fix lufa path * Remove PLAY_NOTE_ARRAY usages to get rid of warning. Fix conflicting function name * Mousekey change default to off * Fix to oled display adjust * make rev2 change pin assign change keymap * use master_buffer * Timing adjustment * Organizing files * Change Keymap * Change Keymap Add EISU and KANA Correct 4rows * NKRO default to disable * EXTRAKEY_ENABLE default to disable * add rgb reset key * rgb custom function enable * Extend font * add RGBLED_POWER default folder to helix/rev2 RGB_ENABLE to no * renamed directory * Disable RGBLIGHT_CUSTOM_DRIVER * Disable LOCKING_SUPPORT_ENABLE * Update bootloader setting * Change readme * Fixed argument error
49 lines
1.1 KiB
C
49 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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