mirror of
https://github.com/qmk/qmk_firmware
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23cd9f4dee
* Add Zinc keyboard * Fix photo * Fix readme.md * Fix RGB LED init of monks/keymap.c * Fix default keymap and readme.jp * Fix change DEFS of RGB ANIMATIONS to LED_ANIMATIONS * Add EOL * Use serial_config_simpleapi.h * Fix comment char * Fix error handling in split_scomm.c : mtei works * Fix keymaps * Remove DISABLE_LEADER definition * Remove pro_micro.h * Add 2 spaces after Hardware name * Fix keymaps - remove audio codes - change LAYOUT to LAYOUT_ortho_4X12 - change "persistent_default_layer_set" to core function * Use the Community Layouts feature - with some clean up
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 400kHz
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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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