i2c.h


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#ifndef _I2C_H

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#define _I2C_H

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#define I2C1_OPEN

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//#define I2C2_OPEN

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#define I2C_SCL_SPEED       (200000)    // SCL in Hz

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#define I2C_OWN_ADDR        (0x00)      // use 0x00 for master

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/**

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 * @brief Definition for I2C1

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 */  

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#if defined  I2C1_OPEN

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  #define Open_I2C                        I2C1

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  #define Open_I2C_CLK                    RCC_APB1Periph_I2C1

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  #define Open_I2C_SCL_PIN                GPIO_Pin_6

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  #define Open_I2C_SCL_GPIO_PORT          GPIOB

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  #define Open_I2C_SCL_GPIO_CLK           RCC_AHB1Periph_GPIOB

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  #define Open_I2C_SCL_SOURCE             GPIO_PinSource6

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  #define Open_I2C_SCL_AF                 GPIO_AF_I2C1

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  #define Open_I2C_SDA_PIN                GPIO_Pin_9

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  #define Open_I2C_SDA_GPIO_PORT          GPIOB

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  #define Open_I2C_SDA_GPIO_CLK           RCC_AHB1Periph_GPIOB

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  #define Open_I2C_SDA_SOURCE             GPIO_PinSource9

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  #define Open_I2C_SDA_AF                 GPIO_AF_I2C1

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  #define Open_I2C_IRQn                   I2C1_EV_IRQn

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  #define I2Cx_IRQHANDLER                 I2C1_EV_IRQHandler

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#elif defined I2C2_OPEN

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  #define Open_I2C                        I2C2

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  #define Open_I2C_CLK                    RCC_APB1Periph_I2C2

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  #define Open_I2C_SCL_PIN                GPIO_Pin_10

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  #define Open_I2C_SCL_GPIO_PORT          GPIOB

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  #define Open_I2C_SCL_GPIO_CLK           RCC_AHB1Periph_GPIOB

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  #define Open_I2C_SCL_SOURCE             GPIO_PinSource10

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  #define Open_I2C_SCL_AF                 GPIO_AF_I2C2

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  #define Open_I2C_SDA_PIN                GPIO_Pin_11

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  #define Open_I2C_SDA_GPIO_PORT          GPIOB

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  #define Open_I2C_SDA_GPIO_CLK           RCC_AHB1Periph_GPIOB

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  #define Open_I2C_SDA_SOURCE             GPIO_PinSource11

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  #define Open_I2C_SDA_AF                 GPIO_AF_I2C2

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  #define Open_I2C_IRQn                   I2C2_EV_IRQn

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  #define I2Cx_IRQHANDLER                 I2C2_EV_IRQHandler

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#else

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  #error "Please select the I2C-Device to be used (in i2c.h)"

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#endif      

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void I2C_BusInit(void);

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int  I2C_ReadTransfer(uint8_t dev_addr, uint8_t *buffer, int cnt, uint32_t ptr, uint8_t ptrlen);

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int  I2C_WriteTransfer(uint8_t dev_addr, uint8_t *buffer, int cnt, uint32_t ptr, uint8_t ptrlen);

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#endif /*_I2C_H*/