/***************************************************************************//**
 * @file 	drv_adc.h
 * @brief 	ADC 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
 * 2011-02-21	onelife		Initial creation for EFM32
 * 2011-07-14	onelife		Add multiple channels support for scan mode
 ******************************************************************************/
#ifndef __DRV_ADC_H__
#define __DRV_ADC_H__

/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
struct efm32_adc_device_t
{
	ADC_TypeDef 			*adc_device;
	rt_uint8_t 				mode;
	rt_uint8_t 				singleCount;
	rt_uint8_t 				singleDmaChannel;
	rt_uint8_t 				scanCount;
	rt_uint8_t 				scanDmaChannel;
};

struct efm32_adc_control_single_t
{
	rt_uint8_t				count;
	rt_uint8_t 				dmaChannel;
	ADC_InitSingle_TypeDef	*init;
};

struct efm32_adc_control_scan_t
{
	rt_uint8_t				count;
	rt_uint8_t 				dmaChannel;
	ADC_InitScan_TypeDef	*init;
};

struct efm32_adc_control_t
{
	rt_uint8_t 				mode;
	struct efm32_adc_control_scan_t 	scan;
	struct efm32_adc_control_single_t 	single;
};

struct efm32_adc_result_t
{
	rt_uint8_t 				mode;
	void 					*buffer;
};

/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
#define ADC_MODE_SINGLE 		(0x01)
#define ADC_MODE_SCAN 			(0x02)
#define ADC_MODE_TAILGATE		(0x04)
#define ADC_OP_SINGLE_REPEAT	(0x10)
#define ADC_OP_SCAN_REPEAT		(0x20)
#define ADC_MASK_MODE			(0x0f)
#define ADC_MASK_OP				(0xf0)

/* Exported functions ------------------------------------------------------- */
void rt_hw_adc_init(void);

#endif /*__DRV_ADC_H__ */