/***************************************************************************

?Author????????:?FangZheng?-?CAST

?Date??????????:?Jun?12th?2012

?File??????????:?ad5422_IO.c

?Hardware??????:?STM32?and?AD5422

?Description???:?Use?the?GPIO?to?simulate?the?SPI?communication?of?AD5422
	
***************************************************************************/
#include?“stm32f10x_gpio.h“
#include?“ad5422_io.h“
?

??#define?SET_CLEAR（）	GPIOC->BSRR??=?GPIO_Pin_8	//PC8->CLEAR
??#define?CLR_CLEAR（）	GPIOC->BRR???=?GPIO_Pin_8

??#define?SET_LATCH（）	GPIOC->BSRR??=?GPIO_Pin_3	//PC3->LATCH
??#define?CLR_LATCH（）	GPIOC->BRR???=?GPIO_Pin_3

??#define?SET_SCL（）		GPIOC->BSRR??=?GPIO_Pin_2	//PC2->SCLK
??#define?CLR_SCL（）		GPIOC->BRR???=?GPIO_Pin_2

??#define?SET_SDO（）		GPIOC->BSRR??=?GPIO_Pin_1	//PC1->SDIN
??#define?CLR_SDO（）		GPIOC->BRR???=?GPIO_Pin_1

??#define?GET_SDI（）?????GPIO_ReadInputDataBit（GPIOC?GPIO_Pin_0）?//PC0->SDO



void?ad54x2_delay?（int?length）
{
	while?（length?>0）
????	length--;
}

//---------------------------------
//void?WriteToAD5422（unsigned?char?countunsigned?char?*buf）;
//---------------------------------
//Function?that?writes?to?the?AD5422?via?the?SPI?port.?
//--------------------------------------------------------------------------------
void?WriteToAD5422（unsigned?char?countunsigned?char?*buf）
{

	unsigned	char	ValueToWrite?=?0;
????unsigned	char	i?=?0;
	unsigned	char	j?=?0;
	

	CLR_LATCH（）;

	for?（?i=count;i>0;i--?）
?	{
	?	ValueToWrite?=	*（buf+i-1）;
		for?（j=0;?j<8;?j++）
		{
			CLR_SCL（）;
			if（0x80?==?（ValueToWrite?&?0x80））
			{
				SET_SDO（）;	????//Send?one?to?SDIN?pin?of?AD5422
			}
			else
			{
				CLR_SDO（）;	????//Send?zero?to?SDIN?pin?of?AD5422
			}
										?
			ad54x2_delay（1）;
			SET_SCL（）;
			ad54x2_delay（1）;
			ValueToWrite?<<=?1;	//Rotate?data
	
		}

	}
	CLR_SCL（）;
	ad54x2_delay（1）;
	SET_LATCH（）;
	ad54x2_delay（20）;
}


//---------------------------------
//ReadFromAD5422（）;
//---------------------------------
//Function?that?reads?from?the?AD5422?via?the?SPI?port.?
//--------------------------------------------------------------------------------
void?ReadFromAD5422（unsigned?char?countunsigned?char?*buf）
{
	unsigned	char	i?=?0;
	unsigned	char	j?=?0;
	unsigned	char??	iTemp?=?0;
	unsigned	char??	RotateData?=?0;

	CLR_LATCH（）;

	for（j=count;?j>0;?j--）
	{
		for（i=0;?i<8;?i++）
		{
		????CLR_SCL（）;
			RotateData?<<=?1;		//Rotate?data
			ad54x2_delay（1）;
			CLR_SDO（）;				//Write?a?nop?condition?when?read?the?data.?
			iTemp?=?GET_SDI（）;		//Read?SDO?of?AD5422
			SET_SCL（）;	
			if（iTemp?==?1）
			{
				RotateData?|=?1;	
			}
			ad54x2_delay（1）;
			
		}
		*（buf+j-1）=?RotateData;
	}
	CLR_SCL（）;
	ad54x2_delay（1）;	?
	SET_LATCH（）;
	ad54x2_delay（20）;
}?
//---------------------------------
//ReadFromAD5422（）;
//---------------------------------
//?
//----------------------------------------------------------

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4728??2012-06-12?09:57??AD5422test\GPIO\GPIO.opt.bak

?????文件????????152??2009-10-20?11:15??AD5422test\GPIO\GPIO.plg

?????文件???????4929??2009-10-20?11:31??AD5422test\GPIO\GPIO.Uv2.bak

????.......?????77847??2013-02-19?16:21??AD5422test\GPIO\GPIO.uvopt

????.......?????56984??2013-02-19?16:18??AD5422test\GPIO\GPIO.uvproj

?????文件???????4728??2012-06-12?09:14??AD5422test\GPIO\GPIO_Opt.Bak

?????文件?????????71??2009-10-20?11:15??AD5422test\GPIO\GPIO_Target?1.dep

?????文件??????????0??2009-10-20?11:15??AD5422test\GPIO\GPIO_Uv2.Bak

????.......?????77849??2013-02-19?16:21??AD5422test\GPIO\GPIO_uvopt.bak

????.......?????60642??2012-06-15?09:37??AD5422test\GPIO\GPIO_uvproj.bak

?????文件??????18651??2012-09-17?21:45??AD5422test\GPIO\JlinkLog.txt

?????文件?????????19??2012-09-17?21:44??AD5422test\GPIO\Obj\ExtDll.iex

?????文件????????270??2013-02-19?16:21??AD5422test\GPIO\Obj\GPIO.plg

?????文件????????479??2012-06-12?09:59??AD5422test\GPIO\Obj\GPIO.sct

?????文件???????1493??2013-02-19?16:20??AD5422test\GPIO\Obj\GPIO.tra

?????文件????????479??2012-06-12?08:41??AD5422test\GPIO\Obj\GPIO_sct.Bak

?????文件???????3685??2013-02-19?16:18??AD5422test\GPIO\Source\AD542X\ad5422_IO.c

?????文件???????2217??2013-02-19?16:19??AD5422test\GPIO\Source\AD542X\ad5422_IO.h

?????文件??????25286??2009-06-23?15:46??AD5422test\GPIO\Source\App\font.h

?????文件??????20605??2009-10-16?15:23??AD5422test\GPIO\Source\App\GLCD.c

?????文件???????3985??2009-08-28?15:49??AD5422test\GPIO\Source\App\GLCD.h

?????文件???????4691??2013-02-19?16:20??AD5422test\GPIO\Source\App\main.c

?????文件???????3125??2009-10-16?17:05??AD5422test\GPIO\Source\App\stm32f10x_conf.h

?????文件???????4285??2009-08-28?16:54??AD5422test\GPIO\Source\App\stm32f10x_it.c

?????文件???????1976??2009-06-23?13:55??AD5422test\GPIO\Source\App\stm32f10x_it.h

?????文件???????1171??2009-10-16?15:51??AD5422test\GPIO\Source\App\USART.c

?????文件????????245??2009-10-16?15:50??AD5422test\GPIO\Source\App\USART.h

?????文件??????17206??2009-06-23?13:55??AD5422test\GPIO\Source\CMSIS\Core\CM3\core_cm3.c

?????文件??????46533??2009-06-23?13:55??AD5422test\GPIO\Source\CMSIS\Core\CM3\core_cm3.h

?????文件??????15600??2009-06-23?13:55??AD5422test\GPIO\Source\CMSIS\Core\CM3\startup\arm\startup_stm32f10x_cl.s

............此處省略81個文件信息