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39 lines
810 B
C
39 lines
810 B
C
/*
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* twi_master.h
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*
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* Created: 09-Jun-19 11:20:04 AM
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* Author: TEP SOVICHEA
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*/
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#ifndef TWI_MASTER_H_
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#define TWI_MASTER_H_
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#include <avr/io.h>
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#include <util/twi.h>
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#include <stdbool.h>
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#define DEBUG_LOG 0
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#define SUCCESS 0
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#define TW_SCL_PIN PORTC5
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#define TW_SDA_PIN PORTC4
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#define TW_SLA_W(ADDR) ((ADDR << 1) | TW_WRITE)
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#define TW_SLA_R(ADDR) ((ADDR << 1) | TW_READ)
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#define TW_READ_ACK 1
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#define TW_READ_NACK 0
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typedef uint16_t ret_code_t;
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typedef enum {
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TW_FREQ_100K,
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TW_FREQ_250K,
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TW_FREQ_400K
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} twi_freq_mode_t;
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void tw_init(twi_freq_mode_t twi_freq, bool pullup_en);
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ret_code_t tw_master_transmit(uint8_t slave_addr, uint8_t* p_data, uint8_t len, bool repeat_start);
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ret_code_t tw_master_receive(uint8_t slave_addr, uint8_t* p_data, uint8_t len);
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#endif /* TWI_MASTER_H_ */ |