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{ return 1; }
}
// Wait for transfer to end
while ((I2C->I2SR & 0x0080) == 0)
{
if (I2C->I2SR & 0x0050)
{ return 1; }
}
// Check for Ack
if (I2C->I2SR & 0x0001)
{ return 1; }
return 0;
}
/******************************************************************************
I2C_WR()
Write a byte to an I2C EEPROM Device. This performs one byte write at a
time to avoid page burst boundary requirements.
ARGS:
t_addr : LSB 3-bit address of target device from base address 0xA0.
b_addr : Byte address in device
*data : Data to write
RTNS:
0 = Success
1 = Failure
******************************************************************************/
int I2C_WR(unsigned char t_addr, unsigned short b_addr, unsigned char *data)
{
i2c_map_t* I2C = (i2c_map_t*) I2C_BASE;
// Arbitrate for Bus
while (I2C->I2SR & 0x0020);
I2C->I2CR |= 0x0020;
// Bus Busy
// Master
// Send device address
if (I2C_TX(0xA0 | ((t_addr & 7) << 1)))
{ I2C->I2CR &= ~0x0030; return 1; }
// Send byte address (MSB first)
if (I2C_TX((unsigned char) (b_addr >> 8)))
{ I2C->I2CR &= ~0x0030; return 1; }
if (I2C_TX((unsigned char) (b_addr & 0x00ff)))
{ I2C->I2CR &= ~0x0030; return 1; }
// Send byte data
if (I2C_TX(*data))
{ I2C->I2CR &= ~0x0030; return 1; }
// Release Bus
I2C->I2CR &= ~0x0030;
// Slave Rx
return 0;
}
/******************************************************************************
I2C_RD()
MSC711x Packet Telephony Farm Card (SPT711xPFCE), Rev. 1
18
Freescale Semiconductor
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