WebSVN - idreammicro-avr - Path Comparison - /trunk/libraries/twi/src Rev 17 and /trunk/libraries/twi/src Rev 47

Ignore whitespace Rev 17 → Rev 47

 /trunk/libraries/twi/src/twi.c
 ,23 → 181,23
 twi__error_t
 twi__start
 (
-        void
+    void
 ){
-        // Send start condition.
-        TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
+    // Send start condition.
+    TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
-        // Wait for TWINT flag set. This indicates that the START condition has
-        // been transmitted.
-        while (!(TWCR & (1 << TWINT)));
+    // Wait for TWINT flag set. This indicates that the START condition has
+    // been transmitted.
+    while (!(TWCR & (1 << TWINT)));
-        // Check value of TWI Status Register. Mask prescaler bits.
-        if (TWSR & TW_NO_INFO != TW_START)
-        {
-                // If status is different from START (TW_START), return error.
-                return TWI__ERROR__ERROR;
-        }
-        return TWI__ERROR__NONE;
+    // Check value of TWI Status Register. Mask prescaler bits.
+    if (TWSR & TW_NO_INFO != TW_START)
+    {
+        // If status is different from START (TW_START), return error.
+        return TWI__ERROR__ERROR;
+    }
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,24 → 208,24
 twi__error_t
 twi__repeat_start
 (
-        void
+    void
 ){
-        // TODO: check if TWSTO must be set.
-        // Send start condition.
-        TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWSTA) | (1 << TWSTO);
+    // TODO: check if TWSTO must be set.
+    // Send start condition.
+    TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWSTA) | (1 << TWSTO);
-        // Wait for TWINT flag set. This indicates that the START condition has
-        // been transmitted.
-        while (!(TWCR & (1 << TWINT)));
+    // Wait for TWINT flag set. This indicates that the START condition has
+    // been transmitted.
+    while (!(TWCR & (1 << TWINT)));
-        // Check value of TWI Status Register. Mask prescaler bits.
-        if (TWSR & TW_NO_INFO != TW_REP_START)
-        {
-                //  If status different from START (TW_REP_START), return error.
-                return TWI__ERROR__ERROR;
-        }
-        return TWI__ERROR__NONE;
+    // Check value of TWI Status Register. Mask prescaler bits.
+    if (TWSR & TW_NO_INFO != TW_REP_START)
+    {
+        //  If status different from START (TW_REP_START), return error.
+        return TWI__ERROR__ERROR;
+    }
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,24 → 240,24
 (
     uint8_t sla
 ){
-        // Load SLA into TWDR register.
-        TWDR = sla | TW_READ;
+    // Load SLA into TWDR register.
+    TWDR = sla | TW_READ;
-        // Clear TWINT bit in TWCR to start transmission of address.
-        TWCR = (1 << TWINT) | (1 << TWEN);
+    // Clear TWINT bit in TWCR to start transmission of address.
+    TWCR = (1 << TWINT) | (1 << TWEN);
-        // Wait for TWINT flag set. This indicates that the SLA+W (TW_WRITE) has
-        // been transmitted, and ACK/NACK has been received.
-        while (!(TWCR & (1 << TWINT)));
+    // Wait for TWINT flag set. This indicates that the SLA+W (TW_WRITE) has
+    // been transmitted, and ACK/NACK has been received.
+    while (!(TWCR & (1 << TWINT)));
-        // Check value of TWI Status Register. Mask prescaler bits. If status
-        // different from MT_SLA_ACK (TW_MR_SLA_ACK), return error.
-        if (TWSR & TW_NO_INFO != TW_MR_SLA_ACK)
-        {
-                return TWI__ERROR__ERROR;
-        }
+    // Check value of TWI Status Register. Mask prescaler bits. If status
+    // different from MT_SLA_ACK (TW_MR_SLA_ACK), return error.
+    if (TWSR & TW_NO_INFO != TW_MR_SLA_ACK)
+    {
+        return TWI__ERROR__ERROR;
+    }
-        return TWI__ERROR__NONE;
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,24 → 272,24
 (
     uint8_t sla
 ){
-        // Load SLA into TWDR register.
-        TWDR = sla | TW_WRITE;
+    // Load SLA into TWDR register.
+    TWDR = sla | TW_WRITE;
-        // Clear TWINT bit in TWCR to start transmission of address.
-        TWCR = (1 << TWINT) | (1 << TWEN);
+    // Clear TWINT bit in TWCR to start transmission of address.
+    TWCR = (1 << TWINT) | (1 << TWEN);
-        // Wait for TWINT flag set. This indicates that the SLA+W (TW_WRITE) has
-        // been transmitted, and ACK/NACK has been received.
-        while (!(TWCR & (1 << TWINT)));
+    // Wait for TWINT flag set. This indicates that the SLA+W (TW_WRITE) has
+    // been transmitted, and ACK/NACK has been received.
+    while (!(TWCR & (1 << TWINT)));
-        // Check value of TWI Status Register. Mask prescaler bits. If status
-        // different from MT_SLA_ACK (TW_MT_SLA_ACK), return error.
-        if (TWSR & TW_NO_INFO != TW_MT_SLA_ACK)
-        {
-                return TWI__ERROR__ERROR;
-        }
+    // Check value of TWI Status Register. Mask prescaler bits. If status
+    // different from MT_SLA_ACK (TW_MT_SLA_ACK), return error.
+    if (TWSR & TW_NO_INFO != TW_MT_SLA_ACK)
+    {
+        return TWI__ERROR__ERROR;
+    }
-        return TWI__ERROR__NONE;
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,26 → 302,26
 twi__error_t
 twi__send_data
 (
-        uint8_t data
+    uint8_t data
 ){
-        // Load data into TWDR register.
-        TWDR = data;
-        // Clear TWINT bit in TWCR to start transmission of data.
-        TWCR = (1 << TWINT) | (1 << TWEN);
+    // Load data into TWDR register.
+    TWDR = data;
-        // Wait for TWINT flag set. This indicates that the data has been
-        // transmitted, and ACK/NACK has been receiver.
-        while (!(TWCR & (1 << TWINT)));
+    // Clear TWINT bit in TWCR to start transmission of data.
+    TWCR = (1 << TWINT) | (1 << TWEN);
-        // Check value of TWI status register. Mask prescaler bits. If status
-        // different from MT_DATA_ACK (TW_MT_DATA_ACK), return error.
-        if (TWSR & TW_NO_INFO != TW_MT_DATA_ACK)
-        {
-                return TWI__ERROR__ERROR;
-        }
-        return TWI__ERROR__NONE;
+    // Wait for TWINT flag set. This indicates that the data has been
+    // transmitted, and ACK/NACK has been receiver.
+    while (!(TWCR & (1 << TWINT)));
+    // Check value of TWI status register. Mask prescaler bits. If status
+    // different from MT_DATA_ACK (TW_MT_DATA_ACK), return error.
+    if (TWSR & TW_NO_INFO != TW_MT_DATA_ACK)
+    {
+        return TWI__ERROR__ERROR;
+    }
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,23 → 334,23
 twi__error_t
 twi__receive_data_ack
 (
-        uint8_t* p_data
+    uint8_t* p_data
 ){
-        // Check the preconditions.
-        assert(NULL != p_data);
+    // Check the preconditions.
+    assert(NULL != p_data);
-        TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWEA);
-        while (!(TWCR & (1 << TWINT)));
+    TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWEA);
-        if ((TWSR & TW_NO_INFO) != TW_MR_DATA_ACK)
-        {
-                return TWI__ERROR__ERROR;
-        }
-        *p_data = TWDR;
+    while (!(TWCR & (1 << TWINT)));
-        return TWI__ERROR__NONE;
+    if ((TWSR & TW_NO_INFO) != TW_MR_DATA_ACK)
+    {
+        return TWI__ERROR__ERROR;
+    }
+    *p_data = TWDR;
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,23 → 363,23
 twi__error_t
 twi__receive_data_nack
 (
-        uint8_t* p_data
+    uint8_t* p_data
 ){
-        // Check the preconditions.
-        assert(NULL != p_data);
+    // Check the preconditions.
+    assert(NULL != p_data);
-        TWCR = (1 << TWEN) | (1 << TWINT);
-        while (!(TWCR & (1 << TWINT)));
+    TWCR = (1 << TWEN) | (1 << TWINT);
-        if ((TWSR & TW_NO_INFO) != TW_MR_DATA_NACK)
-        {
-                return TWI__ERROR__ERROR;
-        }
-        *p_data = TWDR;
-        return TWI__ERROR__NONE;
+    while (!(TWCR & (1 << TWINT)));
+    if ((TWSR & TW_NO_INFO) != TW_MR_DATA_NACK)
+    {
+        return TWI__ERROR__ERROR;
+    }
+    *p_data = TWDR;
+    return TWI__ERROR__NONE;
 }
 /**************************************************************************//**
 ,13 → 390,13
 void
 twi__stop
 (
-        void
+    void
 ){
-        // Transmit stop operation.
-        TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
-        // Wait for stop.
-        while (TWCR & (1 << TWSTO));
+    // Transmit stop operation.
+    TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
+    // Wait for stop.
+    while (TWCR & (1 << TWSTO));
 }
 /******************************************************************************

Subversion Repositories idreammicro-avr

Compare Revisions

Ignore whitespace Rev 17 → Rev 47