/*****************************************************************************
?*???i2c.c:??I2C?C?file?for?NXP?LPC17xx?Family?Microprocessors
?*
?*???Copyright（C）?2009?NXP?Semiconductor
?*???All?rights?reserved.
?*
?*???History
?*???2009.05.26??ver?1.00????Prelimnary?version?first?Release
?*
*****************************************************************************/
#include?“l(fā)pc17xx.h“
#include?“i2c.h“

volatile?uint32_t?I2CMasterState?=?I2C_IDLE;
volatile?uint32_t?I2CSlaveState?=?I2C_IDLE;

volatile?uint32_t?I2CCmd;
volatile?uint32_t?I2CMode;

volatile?uint8_t?I2CMasterBuffer[BUFSIZE];
volatile?uint8_t?I2CSlaveBuffer[BUFSIZE];
volatile?uint32_t?I2CCount?=?0;
volatile?uint32_t?I2CReadLength;
volatile?uint32_t?I2CWriteLength;

volatile?uint32_t?RdIndex?=?0;
volatile?uint32_t?WrIndex?=?0;

/*?
From?device?to?device?the?I2C?communication?protocol?may?vary?
in?the?example?below?the?protocol?uses?repeated?start?to?read?data?from?or?
write?to?the?device:
For?master?read:?the?sequence?is:?STAAddr（W）offsetRE-STAAddr（r）data...STO?
for?master?write:?the?sequence?is:?STAAddr（W）lengthRE-STAAddr（w）data...STO
Thus?in?state?8?the?address?is?always?WRITE.?in?state?10?the?address?could?
be?READ?or?WRITE?depending?on?the?I2CCmd.
*/???

/*****************************************************************************
**?Function?name:		I2C0_IRQHandler
**
**?Descriptions:		I2C0?interrupt?handler?deal?with?master?mode
**						only.
**
**?parameters:			None
**?Returned?value:		None
**?
*****************************************************************************/
void?I2C0_IRQHandler（void）??
{
??uint8_t?StatValue;

??/*?this?handler?deals?with?master?read?and?master?write?only?*/
??StatValue?=?LPC_I2C0->I2STAT;
	
??switch?（?StatValue?）
??{
	case?0x08:			/*?A?Start?condition?is?issued.?*/
	LPC_I2C0->I2DAT?=?I2CMasterBuffer[0];
	LPC_I2C0->I2CONCLR?=?（I2CONCLR_SIC?|?I2CONCLR_STAC）;
	I2CMasterState?=?I2C_STARTED;
	break;
	
	case?0x10:			/*?A?repeated?started?is?issued?*/
	if?（?I2CCmd?==?LM75_TEMP?）
	{
	??LPC_I2C0->I2DAT?=?I2CMasterBuffer[2];
	}
	LPC_I2C0->I2CONCLR?=?（I2CONCLR_SIC?|?I2CONCLR_STAC）;
	I2CMasterState?=?I2C_RESTARTED;
	break;
	
	case?0x18:			/*?Regardless?it‘s?a?ACK?*/
	if?（?I2CMasterState?==?I2C_STARTED?）
	{
	??LPC_I2C0->I2DAT?=?I2CMasterBuffer[1+WrIndex];
	??WrIndex++;
	??I2CMasterState?=?DATA_ACK;
	}
	LPC_I2C0->I2CONCLR?=?I2CONCLR_SIC;
	break;

	case?0x28:	/*?Data?byte?has?been?transmitted?regardless?ACK?or?NACK?*/
	case?0x30:
	if?（?WrIndex?!=?I2CWriteLength?）
	{???
	??LPC_I2C0->I2DAT?=?I2CMasterBuffer[1+WrIndex];?/*?this?should?be?the?last?one?*/
	??WrIndex++;
	??if?（?WrIndex?!=?I2CWriteLength?）
	??{???
		I2CMasterState?=?DATA_ACK;
	??}
	??else
	??{
		I2CMasterState?=?DATA_NACK;
		if?（?I2CReadLength?!=?0?）
		{
		??LPC_I2C0->I2CONSET?=?I2CONSET_STA;	/*?Set?Repeated-start?flag?*/
		??I2CMasterState?=?I2C_REPEATED_START;
		}
	??}
	}
	els

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

?????文件???????8431??2010-06-21?17:56??I2C\JlinkLog.txt

?????文件??????18043??2010-05-13?10:13??I2C\LandTiger_I2C.plg

?????文件??????80567??2011-01-04?18:40??I2C\LandTiger_I2C.uvopt

?????文件??????15663??2011-01-04?18:40??I2C\LandTiger_I2C.uvproj

?????文件???????2141??2011-01-04?18:40??I2C\LandTiger_I2C_LandTiger_I2C.dep

?????文件?????????80??2010-05-13?09:27??I2C\LandTiger_I2C_Target?1.dep

?????文件??????62258??2010-06-21?16:10??I2C\LandTiger_I2C_uvopt.bak

?????文件??????15663??2010-05-13?09:54??I2C\LandTiger_I2C_uvproj.bak

?????文件??????55225??2011-01-04?18:40??I2C\List\LandTiger_I2C.map

?????文件??????42027??2011-01-04?18:40??I2C\List\startup_LPC17xx.lst

?????文件???????3550??2011-01-04?18:40??I2C\Obj\core_cm3.crf

?????文件????????108??2011-01-04?18:40??I2C\Obj\core_cm3.d

?????文件??????10144??2011-01-04?18:40??I2C\Obj\core_cm3.o

?????文件??????60152??2011-01-04?18:40??I2C\Obj\i2c.crf

?????文件????????263??2011-01-04?18:40??I2C\Obj\i2c.d

?????文件??????51712??2011-01-04?18:40??I2C\Obj\i2c.o

?????文件??????58887??2011-01-04?18:40??I2C\Obj\i2cmst.crf

?????文件????????284??2011-01-04?18:40??I2C\Obj\i2cmst.d

?????文件??????49036??2011-01-04?18:40??I2C\Obj\i2cmst.o

?????文件??????56656??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.axf

?????文件???????5983??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.hex

?????文件??????31052??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.htm

?????文件????????368??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.lnp

?????文件????????497??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.plg

?????文件????????479??2010-05-13?09:33??I2C\Obj\LandTiger_I2C.sct

?????文件???????1246??2011-01-04?18:40??I2C\Obj\LandTiger_I2C.tra

?????文件?????????99??2011-01-04?18:40??I2C\Obj\startup_LPC17xx.d

?????文件???????5868??2011-01-04?18:40??I2C\Obj\startup_LPC17xx.o

?????文件??????59508??2011-01-04?18:40??I2C\Obj\system_lpc17xx.crf

?????文件????????360??2011-01-04?18:40??I2C\Obj\system_lpc17xx.d

............此處省略47個文件信息