Comet46 add support for OLED (#4745)
* Add OLED support for Comet46 * fix length of char "name" of keylogger.c * update ssd1306 * fix rules.mk * update led-receiver keymap * Update OLED related code * add mod_state_reader & modify led_state_reader * Update OLED related files * Update kemaps * Update readme * change default-oled-display to default * Add OSM compatibility to mod_state_reader * Code formatting * Use PROGMEM to store code_to_name * Clean up satt keymap * Rename default-led keymap to defult-rgbled
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					 24 changed files with 1918 additions and 342 deletions
				
			
		
							
								
								
									
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								keyboards/comet46/i2c.h
									
										
									
									
									
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								keyboards/comet46/i2c.h
									
										
									
									
									
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#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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