/*
//=========================================================================
// SyncMos/On-Bright MCU
// 上海福跃电子FOSVOS.cn
// 021-58998693
// Driver file for SM39R16A3/OB39R16A3, SM39R08A3/OB39R08A3
//=========================================================================
*/
#include "SM39R16A3.h"
#include "IIC.h"
//===============================
//IIC DEFINITIONs
//===============================
#define d_DEVICE_ID 0xA0 // user modify
#define d_BR32 0x00
#define d_BR64 0x01
#define d_BR128 0x02
#define d_BR256 0x03
#define d_BR512 0x04
#define d_BR1024 0x05
#define d_BR2048 0x06
#define d_BR4096 0x07
#define d_IIC_BR d_BR512 // user modify
#define d_MASTER 0x40
#define d_SLAVE 0x00
#define d_MODE_SEL d_MASTER // use master mode
#define d_IIC_EN 0x80
#define d_NACK 1
#define d_ACK 0
#define d_WRITE 0
#define d_READ 1
#define d_BB_DIS 0x00
#define d_BB_EN 0x08
#define d_BUS_BUSY d_BB_EN
#define d_AR_DIS 0x00
#define d_AR_EN 0x10
#define d_ARBITRATION d_AR_EN
#define d_CMD_RW 0x40
#define d_CMD_Start 0x80
#define d_CMD_Stop 0xC0
//===============================================================
//OWNED SUBROUTINES
//===============================================================
void IIC_interrupt(void) interrupt d_IIC_Vector
{
if(TXIF)
{
TXIF = 0; // Clear interrupt flag
}
if(RXIF)
{
RXIF = 0; // Clear interrupt flag
}
if(MPIF)
{
MPIF=0; // Clear interrupt flag
}
}
void IIC_Init_master(void)
{
IICA1 = d_DEVICE_ID;
IICS = 0x00; // Clear IIC all status
IEN0 |= 0x80; // Enable interrupt All
IEN1 |= 0x20; // Enable interrupt IIC
IICCTL = d_IIC_EN | d_MODE_SEL | d_ARBITRATION | d_BUS_BUSY | d_IIC_BR;
}
void IIC_Disable(void)
{
IICCTL = 0x00; // Disable IIC all function
IEN1 &= 0xDF; // Disable interrupt IIC
IICS = 0x00; // Clear IIC all status
}
//===============================================================
//This function will send out the Start or Re-Start pulse and CONTROL byte.
//===============================================================
bit IIC_SendStart(unsigned char ControlByte)
{
IICA1 = ControlByte; // MAS = 0
IICEBT = d_CMD_Start; // generate a start condition
while(IICEBT != 0x00)
{
;
}
return RXAK;
}
//===============================================================
//This function will send out the Stop pulse
//===============================================================
void IIC_SendStop(void)
{
IICEBT = d_CMD_Stop; // generate a stop condition
while(IICEBT != 0x00) // waiting data recive finish
{
;
}
}
//===============================================================
//This function will wait and receive one byte, then feedback ACK or NACK.
//===============================================================
unsigned char IIC_ReceiveByte(bit ACKStatus)
{
unsigned char temp;
TXAK = ACKStatus; // Feedback ACK/d_NACK to slave
IICEBT = d_CMD_RW; // Ready for receive
while(IICEBT != 0x00) // waiting data recive finish
{
;
}
temp = IICRWD;
//Delay(100); // finetune by user
return(temp);
}
void IIC_TransmitByte(unsigned char TxData)
{
IICRWD = TxData; // load data
IICEBT = d_CMD_RW; // trans. data
while(IICEBT != 0x00) // waiting data trans. finish
{
;
}
//Delay(100); // finetune by user
}
void IIC_Page_Write( char Crtl_byte, unsigned char Addr, char LEN)
{
unsigned char counter=0;
IIC_SendStart(Crtl_byte | d_WRITE); // -- Send CONTROL byte --
if(RXAK==d_ACK)
{
IIC_TransmitByte( Addr ); // -- Send ADDRESS --
for (counter=0; counter<LEN; counter++) // -- Write N bytes --
{
if(RXAK==d_ACK)
{
IIC_TransmitByte(Addr + counter); // -- Transmit one byte --
}
else
{
; // error process
}
}
}
else
{
; // error process
}
IIC_SendStop(); // -- Send STOP -- MStart= 0
}
void IIC_Random_Read( char Crtl_byte, unsigned char Addr, char LEN)
{
unsigned char Temp[16];
unsigned char counter=0;
IIC_SendStart(Crtl_byte | d_WRITE); // -- Send CONTROL byte --
if(RXAK==d_ACK)
{
IIC_TransmitByte(Addr); // -- Send ADDRESS --
if(RXAK==d_ACK)
{
IIC_SendStart(Crtl_byte | d_READ); // -- Send CONTROL byte --
for(counter=0; counter<LEN; counter++) // -- Read N byte --
{
if(RXAK==d_ACK)
{
if(counter<(LEN-1))
{
Temp[counter] = IIC_ReceiveByte(d_ACK); // Receive one byte
}
else
{
Temp[counter] = IIC_ReceiveByte(d_NACK);// Receive last byte
}
}
else
{
; // error process
}
}
}
else
{
; // error process
}
}
else
{
; // error process
}
IIC_SendStop(); // -- Send STOP -- MStart= 0
}
void Check_Arbitration(void) // multi-master use
{
// arbitration lost, set by H/W
// clear by S/W
while(LAIF)
{
LAIF = 0;
}
}
void Check_Busy(void) // multi-master use
{
// Bus busy, BB set by H/W
// Bus ready, BB clear by H/W or S/W
while(BB)
{
;
}
}
|
楼主
