diff options
| author | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
| commit | 071e02c6b6b4837fa9cf0b6d4c749994e02638d7 (patch) | |
| tree | 960446788703b69f0bb285450be80c5b3d8cc22c /LUFA/Drivers/Peripheral/TWI.c | |
| parent | e331b531c6e6d93eb0eee42b9002074e8090ad18 (diff) | |
| download | lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.gz lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.bz2 lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.zip | |
Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
Diffstat (limited to 'LUFA/Drivers/Peripheral/TWI.c')
| -rw-r--r-- | LUFA/Drivers/Peripheral/TWI.c | 146 |
1 files changed, 73 insertions, 73 deletions
diff --git a/LUFA/Drivers/Peripheral/TWI.c b/LUFA/Drivers/Peripheral/TWI.c index 9e0c20dc0..bd6e85384 100644 --- a/LUFA/Drivers/Peripheral/TWI.c +++ b/LUFA/Drivers/Peripheral/TWI.c @@ -1,73 +1,73 @@ -/*
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-#include "TWI.h"
-
-bool TWI_StartTransmission(uint8_t SlaveAddress, uint8_t TimeoutMS)
-{
- for (;;)
- {
- bool BusCaptured = false;
- uint16_t TimeoutRemaining;
-
- TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
-
- TimeoutRemaining = (TimeoutMS * 100);
- while (TimeoutRemaining-- && !(BusCaptured))
- {
- if (TWCR & (1 << TWINT))
- {
- switch (TWSR & TW_STATUS_MASK)
- {
- case TW_START:
- case TW_REP_START:
- BusCaptured = true;
- break;
- case TW_MT_ARB_LOST:
- TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
- continue;
- default:
- TWCR = (1 << TWEN);
- return false;
- }
- }
-
- _delay_us(10);
- }
-
- if (!(BusCaptured))
- {
- TWCR = (1 << TWEN);
- return false;
- }
-
- TWDR = SlaveAddress;
- TWCR = ((1 << TWINT) | (1 << TWEN));
-
- TimeoutRemaining = (TimeoutMS * 100);
- while (TimeoutRemaining--)
- {
- if (TWCR & (1 << TWINT))
- break;
-
- _delay_us(10);
- }
-
- if (!(TimeoutRemaining))
- return false;
-
- switch (TWSR & TW_STATUS_MASK)
- {
- case TW_MT_SLA_ACK:
- case TW_MR_SLA_ACK:
- return true;
- default:
- TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN));
- return false;
- }
- }
-}
+/* + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +#include "TWI.h" + +bool TWI_StartTransmission(uint8_t SlaveAddress, uint8_t TimeoutMS) +{ + for (;;) + { + bool BusCaptured = false; + uint16_t TimeoutRemaining; + + TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN)); + + TimeoutRemaining = (TimeoutMS * 100); + while (TimeoutRemaining-- && !(BusCaptured)) + { + if (TWCR & (1 << TWINT)) + { + switch (TWSR & TW_STATUS_MASK) + { + case TW_START: + case TW_REP_START: + BusCaptured = true; + break; + case TW_MT_ARB_LOST: + TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN)); + continue; + default: + TWCR = (1 << TWEN); + return false; + } + } + + _delay_us(10); + } + + if (!(BusCaptured)) + { + TWCR = (1 << TWEN); + return false; + } + + TWDR = SlaveAddress; + TWCR = ((1 << TWINT) | (1 << TWEN)); + + TimeoutRemaining = (TimeoutMS * 100); + while (TimeoutRemaining--) + { + if (TWCR & (1 << TWINT)) + break; + + _delay_us(10); + } + + if (!(TimeoutRemaining)) + return false; + + switch (TWSR & TW_STATUS_MASK) + { + case TW_MT_SLA_ACK: + case TW_MR_SLA_ACK: + return true; + default: + TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN)); + return false; + } + } +} |