/*********************************************************************************
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* Copyright: (C) 2014 Guo Wenxue<guowenxue@gmail.com>
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* All rights reserved.
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*
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* Filename: gpio_i2c.h
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* Description: STM8 GPIOÄ£ÄâI2C´úÂë
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*
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* Version: 1.0.0(09/28/2014)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "09/28/2014 10:58:17 PM"
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*
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********************************************************************************/
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#include "stm8s.h"
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#ifndef __GPIO_I2C_H_
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#define __GPIO_I2C_H_
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#define I2C_GPIO_BASE GPIOC
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#define I2C_ACK 0
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#define I2C_NAK 1
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#define I2C_OK 0
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#define I2C_ERROR -1
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#define I2C_DIR_READ 1
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#define I2C_DIR_WRITE 0
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/*PC7: I2C SDA */
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#define SDA_MODE_OUT I2C_GPIO_BASE->DDR |= GPIO_PIN_7
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#define SDA_HIGH I2C_GPIO_BASE->ODR |= GPIO_PIN_7
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#define SDA_LOW I2C_GPIO_BASE->ODR &= (uint8_t)(~(GPIO_PIN_7))
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#define SDA_MODE_IN I2C_GPIO_BASE->DDR &= (uint8_t)(~(GPIO_PIN_7))
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#define SDA_DAT I2C_GPIO_BASE->IDR & (uint8_t)GPIO_PIN_7
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/*PC6: I2C SCL */
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#define SCL_HIGH I2C_GPIO_BASE->ODR |= GPIO_PIN_6
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#define SCL_LOW I2C_GPIO_BASE->ODR &= (uint8_t)(~(GPIO_PIN_6))
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extern void gpio_i2c_init(void);
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extern void gpio_i2c_start(void);
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extern void gpio_i2c_stop(void);
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extern uint8_t gpio_i2c_write_byte(uint8_t byte);
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extern uint8_t gpio_i2c_read_byte(void);
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extern uint8_t gpio_i2c_read(uint8_t addr, uint8_t reg_addr);
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extern int gpio_i2c_write(uint8_t addr, uint8_t reg_addr, uint8_t data);
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#endif /* __GPIO_I2C_H_ */
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