74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/***************************************************************************//**
|
|
* @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
|
|
* 2011-07-11 onelife Add lock (semaphore) to prevent simultaneously
|
|
* access
|
|
* 2011-08-04 onelife Change the usage of the second parameter of Read
|
|
* and Write functions from (seldom used) "Offset" to "Slave address"
|
|
* 2011-08-04 onelife Add a timer to prevent from forever waiting
|
|
* 2011-12-27 onelife Change IIC read format
|
|
******************************************************************************/
|
|
#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
|
|
{
|
|
/* Counter */
|
|
rt_uint32_t counter;
|
|
/* Lock */
|
|
struct rt_semaphore *lock;
|
|
/* Pointer to timer */
|
|
rt_timer_t timer;
|
|
/* Timeout flag */
|
|
volatile rt_bool_t timeout;
|
|
/* State */
|
|
rt_uint8_t state;
|
|
/* Pointer to IIC device structure */
|
|
I2C_TypeDef *iic_device;
|
|
/* Self address */
|
|
rt_uint16_t address;
|
|
/* RX structure */
|
|
struct efm32_iic_int_mode_t *rx_buffer;
|
|
};
|
|
|
|
struct efm32_iic_control_t
|
|
{
|
|
rt_uint8_t config;
|
|
rt_uint16_t 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)
|
|
#define IIC_TIMEOUT_PERIOD (RT_TICK_PER_SECOND)
|
|
|
|
#define IIC_OP_READ_ONLY (0xFF)
|
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
void rt_hw_iic_init(void);
|
|
|
|
#endif /* __DRV_IIC_H__ */
|