Add bootloader, nfclib and sensorlib

1 files changed, 582 insertions, 0 deletions

diff --git a/sensorlib/tmp100.c b/sensorlib/tmp100.c
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+//*****************************************************************************

+//

+// tmp100.c - Driver for the TI TMP100 Temperature Sensor

+//

+// Copyright (c) 2013-2014 Texas Instruments Incorporated.  All rights reserved.

+// Software License Agreement

+// 

+// Texas Instruments (TI) is supplying this software for use solely and

+// exclusively on TI's microcontroller products. The software is owned by

+// TI and/or its suppliers, and is protected under applicable copyright

+// laws. You may not combine this software with "viral" open-source

+// software in order to form a larger program.

+// 

+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.

+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT

+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY

+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

+// DAMAGES, FOR ANY REASON WHATSOEVER.

+// 

+// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.

+//

+//*****************************************************************************

+

+#include <math.h>

+#include <stdint.h>

+#include "sensorlib/hw_tmp100.h"

+#include "sensorlib/i2cm_drv.h"

+#include "sensorlib/tmp100.h"

+

+//*****************************************************************************

+//

+//! \addtogroup tmp100_api

+//! @{

+//

+//*****************************************************************************

+

+//*****************************************************************************

+//

+// The states of the TMP100 state machine.

+//

+//*****************************************************************************

+#define TMP100_STATE_IDLE       0

+#define TMP100_STATE_INIT       1

+#define TMP100_STATE_READ       2

+#define TMP100_STATE_WRITE      3

+#define TMP100_STATE_RMW        4

+

+//*****************************************************************************

+//

+// The callback function that is called when I2C transations to/from the TMP100

+// have completed.

+//

+//*****************************************************************************

+static void

+TMP100Callback(void *pvCallbackData, uint_fast8_t ui8Status)

+{

+    tTMP100 *psInst;

+

+    //

+    // Convert the instance data into a pointer to a tTMP100 structure.

+    //

+    psInst = pvCallbackData;

+

+    //

+    // If the I2C master driver encountered a failure, force the state machine

+    // to the idle state (which will also result in a callback to propagate the

+    // error).

+    //

+    if(ui8Status != I2CM_STATUS_SUCCESS)

+    {

+        psInst->ui8State = TMP100_STATE_IDLE;

+    }

+

+    //

+    // Determine the current state of the TMP100 state machine.

+    //

+    switch(psInst->ui8State)

+    {

+        //

+        // All states that trivially transition to IDLE, and all unknown

+        // states.

+        //

+        case TMP100_STATE_INIT:

+        case TMP100_STATE_READ:

+        case TMP100_STATE_WRITE:

+        case TMP100_STATE_RMW:

+        default:

+        {

+            //

+            // The state machine is now idle.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+

+            //

+            // Done.

+            //

+            break;

+        }

+    }

+

+    //

+    // See if the state machine is now idle and there is a callback function.

+    //

+    if((psInst->ui8State == TMP100_STATE_IDLE) && psInst->pfnCallback)

+    {

+        //

+        // Call the application-supplied callback function.

+        //

+        psInst->pfnCallback(psInst->pvCallbackData, ui8Status);

+    }

+}

+

+//*****************************************************************************

+//

+//! Initializes the TMP100 driver.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param psI2CInst is a pointer to the I2C driver instance data.

+//! \param ui8I2CAddr is the I2C address of the TMP100 device.

+//! \param pfnCallback is the function to be called when the initialization has

+//! completed (can be \b NULL if a callback is not required).

+//! \param pvCallbackData is a pointer that is passed to the callback function.

+//!

+//! This function initializes the TMP100 driver, preparing it for operation,

+//! and initiates a reset of the TMP100 device, clearing any previous

+//! configuration data.

+//!

+//! \return Returns 1 if the TMP100 driver was successfully initialized and 0

+//! if it was not.

+//

+//*****************************************************************************

+uint_fast8_t

+TMP100Init(tTMP100 *psInst, tI2CMInstance *psI2CInst, uint_fast8_t ui8I2CAddr,

+           tSensorCallback *pfnCallback, void *pvCallbackData)

+{

+    //

+    // Initialize the TMP100 instance structure

+    //

+    psInst->psI2CInst = psI2CInst;

+    psInst->ui8Addr = ui8I2CAddr;

+    psInst->ui8State = TMP100_STATE_INIT;

+

+    //

+    // Save the callback information.

+    //

+    psInst->pfnCallback = pfnCallback;

+    psInst->pvCallbackData = pvCallbackData;

+

+    //

+    // Write the configuration register to its default value.

+    //

+    psInst->pui8Data[0] = TMP100_O_CONFIG;

+    psInst->pui8Data[1] = 0x00;

+

+    //

+    // Write the reset bit and issue a callback when finished.

+    //

+    if(I2CMWrite(psInst->psI2CInst, ui8I2CAddr, psInst->pui8Data, 2,

+                 TMP100Callback, psInst) == 0)

+    {

+        //

+        // I2CMWrite failed so reset TMP100 state and return zero to indicate

+        // failure.

+        //

+        psInst->ui8State = TMP100_STATE_IDLE;

+        return(0);

+    }

+

+    //

+    // Success

+    //

+    return(1);

+}

+

+//*****************************************************************************

+//

+//! Reads data from TMP100 registers.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param ui8Reg is the first register to read.

+//! \param pui16Data is a pointer to the location to store the data that is

+//! read.

+//! \param ui16Count the number of register values to read.

+//! \param pfnCallback is the function to be called when data read is complete

+//! (can be \b NULL if a callback is not required).

+//! \param pvCallbackData is a pointer that is passed to the callback function.

+//!

+//! This function reads a sequence of data values from consecutive registers in

+//! the TMP100.

+//!

+//! \note The TMP100 does not auto-increment the register pointer, so reads of

+//! more than one value returns garbage for the subsequent values.

+//!

+//! \return Returns 1 if the write was successfully started and 0 if it was

+//! not.

+//

+//*****************************************************************************

+uint_fast8_t

+TMP100Read(tTMP100 *psInst, uint_fast8_t ui8Reg, uint16_t *pui16Data,

+           uint_fast16_t ui16Count, tSensorCallback *pfnCallback,

+           void *pvCallbackData)

+{

+    //

+    // Return a failure if the TMP100 driver is not idle (in other words, there

+    // is already an outstanding request to the TMP100).

+    //

+    if(psInst->ui8State != TMP100_STATE_IDLE)

+    {

+        return(0);

+    }

+

+    //

+    // Save the callback information.

+    //

+    psInst->pfnCallback = pfnCallback;

+    psInst->pvCallbackData = pvCallbackData;

+

+    //

+    // Move the state machine to the wait for read state.

+    //

+    psInst->ui8State = TMP100_STATE_READ;

+

+    //

+    // Read the requested registers from the TMP100.

+    //

+    if(ui8Reg == TMP100_O_CONFIG)

+    {

+        //

+        // The configuration register is only one byte, so only a single byte

+        // read is necessary and no endian swapping is required.

+        //

+        psInst->uCommand.pui8Buffer[0] = ui8Reg;

+        if(I2CMRead(psInst->psI2CInst, psInst->ui8Addr,

+                    psInst->uCommand.pui8Buffer, 1, (uint8_t *)pui16Data, 1,

+                    TMP100Callback, psInst) == 0)

+        {

+            //

+            // The I2C write failed, so move to the idle state and return a

+            // failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+    else

+    {

+        //

+        // This is one of the temperature registers, which are 16-bit

+        // big-endian registers.

+        //

+        if(I2CMRead16BE(&(psInst->uCommand.sReadState), psInst->psI2CInst,

+                        psInst->ui8Addr, ui8Reg, pui16Data, ui16Count,

+                        TMP100Callback, psInst) == 0)

+        {

+            //

+            // The I2C write failed, so move to the idle state and return a

+            // failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+

+    //

+    // Success.

+    //

+    return(1);

+}

+

+//*****************************************************************************

+//

+//! Writes data to TMP100 registers.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param ui8Reg is the first register to write.

+//! \param pui16Data is a pointer to the 16-bit register data to write.

+//! \param ui16Count is the number of 16-bit registers to write.

+//! \param pfnCallback is the function to be called when the data has been

+//! written (can be \b NULL if a callback is not required).

+//! \param pvCallbackData is a pointer that is passed to the callback function.

+//!

+//! This function writes a sequence of data values to consecutive registers in

+//! the TMP100.  The first value in the \e pui16Data buffer contains the data

+//! to be written into the \e ui8Reg register, the second value contains the

+//! data to be written into the next register, and so on.

+//!

+//! \note The TMP100 does not auto-increment the register pointer, so writes of

+//! more than one register are rejected by the TMP100.

+//!

+//! \return Returns 1 if the write was successfully started and 0 if it was

+//! not.

+//

+//*****************************************************************************

+uint_fast8_t

+TMP100Write(tTMP100 *psInst, uint_fast8_t ui8Reg, const uint16_t *pui16Data,

+            uint_fast16_t ui16Count, tSensorCallback *pfnCallback,

+            void *pvCallbackData)

+{

+    //

+    // Return a failure if the TMP100 driver is not idle (in other words, there

+    // is already an outstanding request to the TMP100).

+    //

+    if(psInst->ui8State != TMP100_STATE_IDLE)

+    {

+        return(0);

+    }

+

+    //

+    // Save the callback information.

+    //

+    psInst->pfnCallback = pfnCallback;

+    psInst->pvCallbackData = pvCallbackData;

+

+    //

+    // Move the state machine to the wait for write state.

+    //

+    psInst->ui8State = TMP100_STATE_WRITE;

+

+    //

+    // Write the requested registers to the TMP100.

+    //

+    if(ui8Reg == TMP100_O_CONFIG)

+    {

+        //

+        // The configuration register is only one byte, so only a single byte

+        // write is necessary and no endian swapping is required.

+        //

+        psInst->uCommand.pui8Buffer[0] = ui8Reg;

+        psInst->uCommand.pui8Buffer[1] = *pui16Data & 0xff;

+        if(I2CMWrite(psInst->psI2CInst, psInst->ui8Addr,

+                     psInst->uCommand.pui8Buffer, 2, TMP100Callback,

+                     psInst) == 0)

+        {

+            //

+            // The I2C write failed, so move to the idle state and return a

+            // failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+    else

+    {

+        //

+        // This is one of the temperature registers, which are 16-bit

+        // big-endian registers.

+        //

+        if(I2CMWrite16BE(&(psInst->uCommand.sWriteState), psInst->psI2CInst,

+                         psInst->ui8Addr, ui8Reg, pui16Data, ui16Count,

+                         TMP100Callback, psInst) == 0)

+        {

+            //

+            // The I2C write failed, so move to the idle state and return a

+            // failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+

+    //

+    // Success.

+    //

+    return(1);

+}

+

+//*****************************************************************************

+//

+//! Performs a read-modify-write of a TMP100 register.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param ui8Reg is the register offset to read modify and write

+//! \param ui16Mask is the bit mask that is ANDed with the current register

+//! value.

+//! \param ui16Value is the bit mask that is ORed with the result of the AND

+//! operation.

+//! \param pfnCallback is the function to be called when the data has been

+//! changed (can be \b NULL if a callback is not required).

+//! \param pvCallbackData is a pointer that is passed to the callback function.

+//!

+//! This function changes the value of a register in the TMP100 via a

+//! read-modify-write operation, allowing one of the fields to be changed

+//! without disturbing the other fields.  The \e ui8Reg register is read, ANDed

+//! with \e ui16Mask, ORed with \e ui16Value, and then written back to the

+//! TMP100.

+//!

+//! \return Returns 1 if the read-modify-write was successfully started and 0

+//! if it was not.

+//

+//*****************************************************************************

+uint_fast8_t

+TMP100ReadModifyWrite(tTMP100 *psInst, uint_fast8_t ui8Reg,

+                      uint_fast16_t ui16Mask, uint_fast16_t ui16Value,

+                      tSensorCallback *pfnCallback, void *pvCallbackData)

+{

+    //

+    // Return a failure if the TMP100 driver is not idle (in other words, there

+    // is already an outstanding request to the TMP100).

+    //

+    if(psInst->ui8State != TMP100_STATE_IDLE)

+    {

+        return(0);

+    }

+

+    //

+    // Save the callback information.

+    //

+    psInst->pfnCallback = pfnCallback;

+    psInst->pvCallbackData = pvCallbackData;

+

+    //

+    // Move the state machine to the wait for read-modify-write state.

+    //

+    psInst->ui8State = TMP100_STATE_RMW;

+

+    //

+    // Submit the read-modify-write request to the TMP100.

+    //

+    if(ui8Reg == TMP100_O_CONFIG)

+    {

+        //

+        // The configuration register is only one byte, so only a single byte

+        // read-modify-write is necessary and no endian swapping is required.

+        //

+        if(I2CMReadModifyWrite8(&(psInst->uCommand.sReadModifyWriteState8),

+                                psInst->psI2CInst, psInst->ui8Addr, ui8Reg,

+                                ui16Mask & 0xff, ui16Value & 0xff,

+                                TMP100Callback, psInst) == 0)

+        {

+            //

+            // The I2C read-modify-write failed, so move to the idle state and

+            // return a failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+    else

+    {

+        //

+        // This is one of the temperature registers, which are 16-bit

+        // big-endian registers.

+        //

+        if(I2CMReadModifyWrite16BE(&(psInst->uCommand.sReadModifyWriteState16),

+                                   psInst->psI2CInst, psInst->ui8Addr, ui8Reg,

+                                   ui16Mask, ui16Value, TMP100Callback,

+                                   psInst) == 0)

+        {

+            //

+            // The I2C read-modify-write failed, so move to the idle state and

+            // return a failure.

+            //

+            psInst->ui8State = TMP100_STATE_IDLE;

+            return(0);

+        }

+    }

+

+    //

+    // Success.

+    //

+    return(1);

+}

+

+//*****************************************************************************

+//

+//! Reads the temperature data from the TMP100.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param pfnCallback is the function to be called when the data has been read

+//! (can be \b NULL if a callback is not required).

+//! \param pvCallbackData is a pointer that is passed to the callback function.

+//!

+//! This function initiates a read of the TMP100 data registers.  When the read

+//! has completed (as indicated by calling the callback function), the new

+//! readings can be obtained via:

+//!

+//! - TMP100DataTemperatureGetRaw()

+//! - TMP100DataTemperatureGetFloat()

+//!

+//! \return Returns 1 if the read was successfully started and 0 if it was not.

+//

+//*****************************************************************************

+uint_fast8_t

+TMP100DataRead(tTMP100 *psInst, tSensorCallback *pfnCallback,

+               void *pvCallbackData)

+{

+    //

+    // Return a failure if the TMP100 driver is not idle (in other words, there

+    // is already an outstanding request to the TMP100).

+    //

+    if(psInst->ui8State != TMP100_STATE_IDLE)

+    {

+        return(0);

+    }

+

+    //

+    // Save the callback information.

+    //

+    psInst->pfnCallback = pfnCallback;

+    psInst->pvCallbackData = pvCallbackData;

+

+    //

+    // Move the state machine to the wait for data read state.

+    //

+    psInst->ui8State = TMP100_STATE_READ;

+

+    //

+    // Read the temperature data from the TMP100.

+    //

+    psInst->uCommand.pui8Buffer[0] = TMP100_O_TEMP;

+    if(I2CMRead(psInst->psI2CInst, psInst->ui8Addr,

+                psInst->uCommand.pui8Buffer, 1, psInst->pui8Data, 2,

+                TMP100Callback, psInst) == 0)

+    {

+        //

+        // The I2C read failed, so move to the idle state and return a failure.

+        //

+        psInst->ui8State = TMP100_STATE_IDLE;

+        return(0);

+    }

+

+    //

+    // Success.

+    //

+    return(1);

+}

+

+//*****************************************************************************

+//

+//! Gets the raw measurement data from the most recent data read.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param pi16Temperature is a pointer to the value into which the raw

+//! temperature data is stored.

+//!

+//! This function returns the raw measurement data from the most recent data

+//! read.  The data is not manipulated in any way by the driver.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+TMP100DataTemperatureGetRaw(tTMP100 *psInst, int16_t *pi16Temperature)

+{

+    //

+    // Return the raw temperature value.

+    //

+    *pi16Temperature =

+        ((int16_t)psInst->pui8Data[0] << 8) | psInst->pui8Data[1];

+}

+

+//*****************************************************************************

+//

+//! Gets the measurement data from the most recent data read.

+//!

+//! \param psInst is a pointer to the TMP100 instance data.

+//! \param pfTemperature is a pointer to the value into which the temperature

+//! data is stored as floating point degrees Celsius.

+//!

+//! This function returns the temperature data from the most recent data read,

+//! converted into Celsius.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+TMP100DataTemperatureGetFloat(tTMP100 *psInst, float *pfTemperature)

+{

+    //

+    // Convert the temperature reading into Celcius.

+    //

+    *pfTemperature = ((float)(((int16_t)psInst->pui8Data[0] << 8) |

+                              psInst->pui8Data[1]) / 256.0);

+}

+

+//*****************************************************************************

+//

+// Close the Doxygen group.

+//! @}

+//

+//*****************************************************************************