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Move TWI.c driver into the straight LUFA/Drivers/Peripheral/ directory.

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Fix TemperatureDataLogger and Webserver project builds.
This commit is contained in:
Dean Camera 2010-01-25 13:02:25 +00:00
parent db420853ce
commit 4bd44139b1
7 changed files with 11 additions and 10 deletions
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54
LUFA/Drivers/Peripheral/TWI.c Normal file
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@ -0,0 +1,54 @@
/*
Copyright (C) Dean Camera, 2010.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
#include "TWI.h"
bool TWI_StartTransmission(uint8_t SlaveAddress)
{
for (;;)
{
uint8_t IterationsRemaining = 50;
bool BusCaptured = false;
while (IterationsRemaining-- && !BusCaptured)
{
TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
while (!(TWCR & (1 << TWINT)));
switch (TWSR & TW_STATUS_MASK)
{
case TW_START:
case TW_REP_START:
BusCaptured = true;
break;
case TW_MT_ARB_LOST:
continue;
default:
return false;
}
}
if (!(BusCaptured))
return false;
TWDR = SlaveAddress;
TWCR = ((1 << TWINT) | (1 << TWEN));
while (!(TWCR & (1 << TWINT)));
GPIOR0 = (TWSR & TW_STATUS_MASK);
switch (TWSR & TW_STATUS_MASK)
{
case TW_MT_SLA_ACK:
case TW_MR_SLA_ACK:
return true;
default:
TWI_StopTransmission();
break;
}
}
}