rt-thread-official/bsp/efm32/drv_iic.h

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/******************************************************************//**
* @file drv_iic.h
* @brief IIC driver of RT-Thread RTOS for EFM32
* COPYRIGHT (C) 2011, RT-Thread Development Team
* @author onelife
* @version 0.4 beta
**********************************************************************
* @section License
* The license and distribution terms for this file may be found in the file LICENSE in this
* distribution or at http://www.rt-thread.org/license/LICENSE
**********************************************************************
* @section Change Logs
* Date Author Notes
* 2011-01-07 onelife Initial creation for EFM32
*********************************************************************/
#ifndef __DRV_IIC_H__
#define __DRV_IIC_H__
/* Includes -------------------------------------------------------------------*/
/* Exported types -------------------------------------------------------------*/
struct efm32_iic_int_mode_t
{
rt_uint8_t *data_ptr;
rt_uint8_t data_size;
rt_uint32_t read_index, save_index;
};
struct efm32_iic_device_t
{
/* State */
rt_uint8_t state;
/* Pointer to IIC device structure */
I2C_TypeDef* iic_device;
/* Master address */
rt_uint16_t master_address;
/* Slave address */
rt_uint16_t slave_address;
/* RX structure */
struct efm32_iic_int_mode_t *rx_buffer;
};
struct efm32_iic_control_t
{
rt_uint8_t config;
rt_uint16_t master_address;
rt_uint16_t slave_address;
};
/* Exported constants ---------------------------------------------------------*/
/* Exported macro -------------------------------------------------------------*/
#define IIC_STATE_MASTER (1 << 0)
#define IIC_STATE_BROADCAST (1 << 1)
//#define IIC_STATE_TX_BUSY (1 << 2)
#define IIC_STATE_RX_BUSY (1 << 3)
/* Exported functions --------------------------------------------------------- */
void rt_hw_iic_init(void);
#endif /* __DRV_IIC_H__ */