#include "global.h"
#include "hw_gpiodrv.h"
#define setBit(x,b) (x) |= (1U<<(b))
#define clearBit(x,b) （x) &= ~(1U<<(b))
#define flipBit(x,b) (x) ^= (1U<<(b))
#define flipbyte(x) (x) ^= 0xff
#define testBit(x,b) ((x) & (1U<<(b)))
#define hwgpio_ReadPort(port_x) port_x
#define hwgpio_WritePort(port_x, val) port_x = val
#define hwgpio_SetPin(port_x,pin_x) setBit(port_x,pin_x)
#define hwgpio_ClearPin(port_x, pin_x) clearBit(port_x, pin_x)
#define hwgpio_flipPin(port_x, pin_x) flipBit(port_x, pin_x)
#define b_hwgpio_ReadPin(port_x, pin_x) testBit(port_x,pin_x)
#define AT24C256_I2cWRITE 0xA0 // 定义24CXX的器件地址SLA和方向位W
#define AT24C256_I2cREAD 0xA1 //定义24CXX的器件地址SLA和方向位R
#define I2CEPR_DELAY _nop_();_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
#define SET_SDAEPR_HIGH hwgpio_SetPin( EPR_SDA_PORT, EPR_SDA_PIN) /* set SDA to high */
#define SET_SDAEPR_LOW hwgpio_ClearPin( EPR_SDA_PORT, PR_SDA_PIN) /* set SDA to low */
#define SET_SCLEPR_HIGH hwgpio_SetPin( EPR_SCL_PORT, EPR_SCL_PIN) /* set SCL to high */
#define SET_SCLEPR_LOW hwgpio_ClearPin( EPR_SCL_PORT, EPR_SCL_PIN) /* set SCL to low */
#define SET_SDAEPR_TO_INPUT hwgpio_SetPin( EPR_SDA_PORT, EPR_SDA_PIN)
#define SET_SDAEPR_TO_OUTPUT ;
#define GET_SDAEPR_VALUE b_hwgpio_ReadPin( EPR_SDA_PORT, EPR_SDA_PIN)
static void _hwi2c_I2cSendStart(void);
static void _hwi2c_I2cSendStop(void);
static void _hwi2c_I2cSendNAck(void);
static u1_t _u1_hwi2c_I2cGetAck(void);
static u1_t _u1_hwi2c_I2cSendByte(u1_t value);
static void _hwi2c_I2cSendAck(void);
static u1_t _u1_hwi2c_I2cGetByte(void);
static u1_t _u1_hwi2c_I2cGetLastByte(void);
/*
-----------------------------------------------------------------------------
Function name : _hwrtc_I2cSendStart
Purpose :i2c bus write/read start program
Input parameters :none
Output parameters : none
-----------------------------------------------------------------------------
*/
static void _hwi2c_I2cSendStart(void)
{
SET_SDAEPR_HIGH; //发送起始条件的数据信号
SET_SCLEPR_HIGH; /* set SDA,SCL to high */
I2CEPR_DELAY; //起始条件建立时间大于4.7us延时
SET_SDAEPR_LOW; //发送起始信号 /* set SDA to low */
I2CEPR_DELAY; //起始条件锁定时间大于4us
SET_SCLEPR_LOW; //钳住总线，准备发送或接收数据 /* set SCL to low */
I2CEPR_DELAY;
}
/*
-----------------------------------------------------------------------------
Function name : _hwrtc_I2cSendStop
Purpose :i2c bus write/read stop program
Input parameters :none
Output parameters : none
-----------------------------------------------------------------------------
*/
static void _hwi2c_I2cSendStop(void)
{
SET_SDAEPR_LOW; /* set SDA to low */
I2CEPR_DELAY ;
SET_SCLEPR_HIGH; /* set SCL to high */
I2CEPR_DELAY ;
SET_SDAEPR_HIGH; /* set SDA to high */
I2CEPR_DELAY ;
SET_SCLEPR_LOW;
}
/*
-----------------------------------------------------------------------------
Function name : _hwrtc_I2cSendNAck
Purpose :Send NACK Signal
Input parameters :none
Output parameters : none
-----------------------------------------------------------------------------
*/
static void _hwi2c_I2cSendNAck(void)
{
SET_SDAEPR_HIGH; /* set SDA to high */
I2CEPR_DELAY ;
SET_SCLEPR_HIGH; /* set SCL to high */
I2CEPR_DELAY ;
SET_SCLEPR_LOW; /* set SCL to low */
I2CEPR_DELAY ;
}
/*
-----------------------------------------------------------------------------
Function name : _u1_hwrtc_I2cGetAck
Purpose :Get ACK Signal
Input parameters :none
Output parameters : ACK Signal
-----------------------------------------------------------------------------
*/
static u1_t _u1_hwi2c_I2cGetAck(void)
{
u1_t __temp = TRUE, __i = 0xFF;
SET_SDAEPR_HIGH; /* set SDA to high,Release SDA for ACK */
I2CEPR_DELAY ;
// SET_SDAEPR_TO_INPUT; /* set SDA -intput port */
SET_SCLEPR_HIGH; /* set SCL to high,raise ACK clock */
//--------------modified by whs 070929----------------------
I2CEPR_DELAY ;
while((--__i) && (__temp))
{
__temp = GET_SDAEPR_VALUE;
}
// __temp = GET_SDAEPR_VALUE; /* get SDA status */
//-----------------------------------------------------------
// __temp = rtc_SDA ;
// SET_SDAEPR_TO_OUTPUT; /* set SDA -Output port */
SET_SCLEPR_LOW; /* set SCL to low */
I2CEPR_DELAY ;
if (__temp) /* if success return 0x01,else return 0x00 */
{
return FALSE;
}
else
{
return TRUE;
}
}
/*
-----------------------------------------------------------------------------
Function name : _u1_hwrtc_I2cSendByte
Purpose :Send one byte to I2C interface
Input parameters :value-the Byte that will be sent
Output parameters : TRUE or FALSE
-----------------------------------------------------------------------------
*/
static u1_t _u1_hwi2c_I2cSendByte(u1_t value)
{
u1_t __i, __temp;
for (__i = 0; __i < BITSOFBYTE; __i++)
{
__temp = value;
__temp >>= 7 - __i;
__temp &= 0x01;
if (__temp == 0)
{
SET_SDAEPR_LOW;
} /* set SDA to low */
else
{
SET_SDAEPR_HIGH;
} /* set SDA to high */
I2CEPR_DELAY ;
SET_SCLEPR_HIGH; /* set SCL to high */
I2CEPR_DELAY ;
SET_SCLEPR_LOW; /* set SCL to low */
I2CEPR_DELAY ;
}
return(_u1_hwi2c_I2cGetAck()); /* if sucess return 0x01,else return 0x00 */
}
/*
-----------------------------------------------------------------------------
Function name : _hwrtc_I2cSendAck
Purpose :Send ACK Signal
Input parameters :none
Output parameters : none
-----------------------------------------------------------------------------
*/
static void _hwi2c_I2cSendAck(void)
{
SET_SDAEPR_LOW;
I2CEPR_DELAY ;
SET_SCLEPR_HIGH;
I2CEPR_DELAY ;
SET_SCLEPR_LOW;
I2CEPR_DELAY ;
}
/*
-----------------------------------------------------------------------------
Function name : _u1_hwrtc_I2cGetByte
Purpose :Get one byte from I2C interface
Input parameters :none
Output parameters : the byte from I2C interface
-----------------------------------------------------------------------------
*/
static u1_t _u1_hwi2c_I2cGetByte(void)
{
u1_t __i, __temp, __temp1;
__temp = 0;
SET_SDAEPR_TO_INPUT;
for (__i = 0; __i < BITSOFBYTE; __i++)
{
__temp <<= 1;
SET_SCLEPR_HIGH;
I2CEPR_DELAY ;
__temp1 = GET_SDAEPR_VALUE;
__temp |= __temp1;
SET_SCLEPR_LOW;
I2CEPR_DELAY ;
}
SET_SDAEPR_TO_OUTPUT;
_hwi2c_I2cSendAck();
return(__temp);
}
/*
-----------------------------------------------------------------------------
Function name : _u1_hwrtc_I2cGetLastByte
Purpose :Get the last byte form I2C interface
Input parameters :none
Output parameters : the last byte from I2C interface
-----------------------------------------------------------------------------
*/
static u1_t _u1_hwi2c_I2cGetLastByte(void)
{
u1_t __i, __temp, __temp1;
__temp = 0;
SET_SDAEPR_TO_INPUT;
for (__i = 0; __i < BITSOFBYTE; __i++)
{
__temp <<= 1;
SET_SCLEPR_HIGH;
I2CEPR_DELAY ;
__temp1 = GET_SDAEPR_VALUE;
__temp |= __temp1;
SET_SCLEPR_LOW;
I2CEPR_DELAY ;
}
// SET_SDAEPR_TO_OUTPUT; edit by whs no define
_hwi2c_I2cSendNAck();
return(__temp);
}
/*
-----------------------------------------------------------------------------
Function name : u1_hwrtc_I2cReadBlock
Purpose : write data to i2c device
Input parameters :
mode: 1 for 1 byte address device,2 for 2 byte address device
Output parameters : none
-----------------------------------------------------------------------------
*/
u1_t u1_hwi2cepr_I2ceprReadBlock(u2_t address, u1_t* dat, u1_t size)
{
u1_t __i;
u1_t __status;
bool_t b_ea ;
b_ea = _testbit_(EA) ;
_hwi2c_I2cSendStart();
__status = _u1_hwi2c_I2cSendByte(AT24C256_I2cWRITE);
if (__status == TRUE)
{
__status = _u1_hwi2c_I2cSendByte((u1_t)(address>>BITSOFBYTE)); /*send the high byte first*/
}
if (__status == TRUE)
{
__status = _u1_hwi2c_I2cSendByte((u1_t)address);
}
if (__status == TRUE)
{
_hwi2c_I2cSendStart();
__status = _u1_hwi2c_I2cSendByte(AT24C256_I2cREAD);
}
if (__status == TRUE)
{
for (__i=0; __i<size-1; __i++)
{
dat[__i] = _u1_hwi2c_I2cGetByte();
}
dat[__i] = _u1_hwi2c_I2cGetLastByte();
}
_hwi2c_I2cSendStop();
EA = b_ea ;
return (__status);
}
/*
-----------------------------------------------------------------------------
Function name : u1_hwrtc_I2cWriteBlock
Purpose : read data from i2c device
Input parameters :
mode: 1 for 1 byte address device,2 for 2 byte address device
Output parameters : none
-----------------------------------------------------------------------------
*/
u1_t u1_hwi2cepr_I2ceprWriteBlock(u2_t address, u1_t* dat, u1_t size)
{
u1_t __i;
u1_t __status;
bool_t b_ea ;
b_ea = _testbit_(EA) ;
_hwi2c_I2cSendStart();
__status = _u1_hwi2c_I2cSendByte(AT24C256_I2cWRITE);
if (__status == TRUE)
{
__status = _u1_hwi2c_I2cSendByte((u1_t)(address>>BITSOFBYTE)); /*send the high byte first*/
}
if (__status == TRUE)
{
__status = _u1_hwi2c_I2cSendByte((u1_t)address);
}
if (__status == TRUE)
{
for (__i=0; __i<size; __i++)
{
__status = _u1_hwi2c_I2cSendByte( *(dat+__i) );
if (__status == FALSE)
{
break;
}
}
}
_hwi2c_I2cSendStop();
EA = b_ea ;
return (__status);
}
/*
-----------------------------------------------------------------------------
Function name : hwrtc_I2cSetMode
Purpose : set i2c mode
Input parameters :
mode: 1 for 1 byte address device,2 for 2 byte address device
Output parameters : none
-----------------------------------------------------------------------------
*/
void hwi2cepr_I2ceprInit(void)
{
u1_t __i ;
SET_SDAEPR_HIGH ;
for(__i = 0; __i < 9; __i++)
{
SET_SCLEPR_HIGH ;
I2CEPR_DELAY;
SET_SCLEPR_LOW ;
I2CEPR_DELAY;
}
_hwi2c_I2cSendStop();
}
问题：
1、该写数据没有问题（用该程序写，用正常的程序读发现没有问题），但读数据的时候统一被乘了2，（不会报失败），即本该是1读出却是2，本是2读出为4，而IO口操作改回之前的IO直接操作的方式就没有问题，并程序中已关掉了中断，程序时序、代码上没有问题，正常的和异常程序的不同只在于：一个指令周期能实现的端口操作现在需要大概6～8个周期实现，难道是IIC操作慢了就会造成这种问题吗？？？
2、中断程序有有对xdata的操作，并测试发现如果不关中断确实对iic操作有较大影响，（改回原来直接对io口操作的方式进行测试），也是也只是对写操作会报失败，读没有问题，这一点也比较费解，难道是中断中P2口有对xdata寻址而混淆iic操作，但为什么只写有错，而读的数据不会出错？
另：
芯片是SST89E594，24C256，上拉为5.1K。
sda和scl都是用的P2的口线，P2做io口用的，没有接地址总线，芯片内集成有3k的xdata空间，iic操作的时候把中断关闭了，（中断程序有有对xdata的操作，并测试发现如果不关中断确实对iic操作有较大影响，但是也只是对写操作会报失败，读没有问题，这一点也比较费解，难道是中断中P2口有对xdata寻址而混淆iic操作，但为什么只写有错，而读的数据不会出错？）。
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