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unleashed-firmware/lib/ST25RFAL002/source/st25r3916/st25r3916_com.c
Aleksandr Kutuzov 4c9eb4928d NFC: application + rfal + driver.
2020-10-20 14:12:28 +03:00

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/******************************************************************************
* \attention
*
* <h2><center>&copy; COPYRIGHT 2020 STMicroelectronics</center></h2>
*
* Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* www.st.com/myliberty
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
* AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/*
* PROJECT: ST25R3916 firmware
* Revision:
* LANGUAGE: ISO C99
*/
/*! \file
*
* \author Gustavo Patricio
*
* \brief Implementation of ST25R3916 communication
*
*/
/*
******************************************************************************
* INCLUDES
******************************************************************************
*/
#include "st25r3916.h"
#include "st25r3916_com.h"
#include "st25r3916_led.h"
#include "st_errno.h"
#include "platform.h"
#include "utils.h"
/*
******************************************************************************
* LOCAL DEFINES
******************************************************************************
*/
#define ST25R3916_OPTIMIZE true /*!< Optimization switch: false always write value to register */
#define ST25R3916_I2C_ADDR (0xA0U >> 1) /*!< ST25R3916's default I2C address */
#define ST25R3916_REG_LEN 1U /*!< Byte length of a ST25R3916 register */
#define ST25R3916_WRITE_MODE (0U << 6) /*!< ST25R3916 Operation Mode: Write */
#define ST25R3916_READ_MODE (1U << 6) /*!< ST25R3916 Operation Mode: Read */
#define ST25R3916_CMD_MODE (3U << 6) /*!< ST25R3916 Operation Mode: Direct Command */
#define ST25R3916_FIFO_LOAD (0x80U) /*!< ST25R3916 Operation Mode: FIFO Load */
#define ST25R3916_FIFO_READ (0x9FU) /*!< ST25R3916 Operation Mode: FIFO Read */
#define ST25R3916_PT_A_CONFIG_LOAD (0xA0U) /*!< ST25R3916 Operation Mode: Passive Target Memory A-Config Load */
#define ST25R3916_PT_F_CONFIG_LOAD (0xA8U) /*!< ST25R3916 Operation Mode: Passive Target Memory F-Config Load */
#define ST25R3916_PT_TSN_DATA_LOAD (0xACU) /*!< ST25R3916 Operation Mode: Passive Target Memory TSN Load */
#define ST25R3916_PT_MEM_READ (0xBFU) /*!< ST25R3916 Operation Mode: Passive Target Memory Read */
#define ST25R3916_CMD_LEN (1U) /*!< ST25R3916 CMD length */
#define ST25R3916_BUF_LEN (ST25R3916_CMD_LEN+ST25R3916_FIFO_DEPTH) /*!< ST25R3916 communication buffer: CMD + FIFO length */
/*
******************************************************************************
* MACROS
******************************************************************************
*/
#ifdef RFAL_USE_I2C
#define st25r3916I2CStart() platformI2CStart() /*!< ST25R3916 HAL I2C driver macro to start a I2C transfer */
#define st25r3916I2CStop() platformI2CStop() /*!< ST25R3916 HAL I2C driver macro to stop a I2C transfer */
#define st25r3916I2CRepeatStart() platformI2CRepeatStart() /*!< ST25R3916 HAL I2C driver macro to repeat Start */
#define st25r3916I2CSlaveAddrWR( sA ) platformI2CSlaveAddrWR( sA ) /*!< ST25R3916 HAL I2C driver macro to repeat Start */
#define st25r3916I2CSlaveAddrRD( sA ) platformI2CSlaveAddrRD( sA ) /*!< ST25R3916 HAL I2C driver macro to repeat Start */
#endif /* RFAL_USE_I2C */
#if defined(ST25R_COM_SINGLETXRX) && !defined(RFAL_USE_I2C)
static uint8_t comBuf[ST25R3916_BUF_LEN]; /*!< ST25R3916 communication buffer */
static uint16_t comBufIt; /*!< ST25R3916 communication buffer iterator */
#endif /* ST25R_COM_SINGLETXRX */
/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
/*!
******************************************************************************
* \brief ST25R3916 communication Start
*
* This method performs the required actions to start communications with
* ST25R3916, either by SPI or I2C
******************************************************************************
*/
static void st25r3916comStart( void );
/*!
******************************************************************************
* \brief ST25R3916 communication Stop
*
* This method performs the required actions to terminate communications with
* ST25R3916, either by SPI or I2C
******************************************************************************
*/
static void st25r3916comStop( void );
/*!
******************************************************************************
* \brief ST25R3916 communication Repeat Start
*
* This method performs the required actions to repeat start a transmission
* with ST25R3916, either by SPI or I2C
******************************************************************************
*/
#ifdef RFAL_USE_I2C
static void st25r3916comRepeatStart( void );
#else
#define st25r3916comRepeatStart()
#endif /* RFAL_USE_I2C */
/*!
******************************************************************************
* \brief ST25R3916 communication Tx
*
* This method performs the required actions to transmit the given buffer
* to ST25R3916, either by SPI or I2C
*
* \param[in] txBuf : the buffer to transmit
* \param[in] txLen : the length of the buffer to transmit
* \param[in] last : true if last data to be transmitted
* \param[in] txOnly : true no reception is to be performed
*
******************************************************************************
*/
static void st25r3916comTx( const uint8_t* txBuf, uint16_t txLen, bool last, bool txOnly );
/*!
******************************************************************************
* \brief ST25R3916 communication Rx
*
* This method performs the required actions to receive from ST25R3916 the given
* amount of bytes, either by SPI or I2C
*
* \param[out] rxBuf : the buffer place the received bytes
* \param[in] rxLen : the length to receive
*
******************************************************************************
*/
static void st25r3916comRx( uint8_t* rxBuf, uint16_t rxLen );
/*!
******************************************************************************
* \brief ST25R3916 communication Tx Byte
*
* This helper method transmits a byte passed by value and not by reference
*
* \param[in] txByte : the value of the byte to be transmitted
* \param[in] last : true if last byte to be transmitted
* \param[in] txOnly : true no reception is to be performed
*
******************************************************************************
*/
static void st25r3916comTxByte( uint8_t txByte, bool last, bool txOnly );
/*
******************************************************************************
* LOCAL FUNCTION
******************************************************************************
*/
static void st25r3916comStart( void )
{
/* Make this operation atomic, disabling ST25R3916 interrupt during communications*/
platformProtectST25RComm();
#ifdef RFAL_USE_I2C
/* I2C Start and send Slave Address */
st25r3916I2CStart();
st25r3916I2CSlaveAddrWR( ST25R3916_I2C_ADDR );
#else
/* Perform the chip select */
platformSpiSelect();
#if defined(ST25R_COM_SINGLETXRX)
comBufIt = 0; /* reset local buffer position */
#endif /* ST25R_COM_SINGLETXRX */
#endif /* RFAL_USE_I2C */
}
/*******************************************************************************/
static void st25r3916comStop( void )
{
#ifdef RFAL_USE_I2C
/* Generate Stop signal */
st25r3916I2CStop();
#else
/* Release the chip select */
platformSpiDeselect();
#endif /* RFAL_USE_I2C */
/* reEnable the ST25R3916 interrupt */
platformUnprotectST25RComm();
}
/*******************************************************************************/
#ifdef RFAL_USE_I2C
static void st25r3916comRepeatStart( void )
{
st25r3916I2CRepeatStart();
st25r3916I2CSlaveAddrRD( ST25R3916_I2C_ADDR );
}
#endif /* RFAL_USE_I2C */
/*******************************************************************************/
static void st25r3916comTx( const uint8_t* txBuf, uint16_t txLen, bool last, bool txOnly )
{
NO_WARNING(last);
NO_WARNING(txOnly);
if( txLen > 0U )
{
#ifdef RFAL_USE_I2C
platformI2CTx( txBuf, txLen, last, txOnly );
#else /* RFAL_USE_I2C */
#ifdef ST25R_COM_SINGLETXRX
ST_MEMCPY( &comBuf[comBufIt], txBuf, MIN( txLen, (ST25R3916_BUF_LEN - comBufIt) ) ); /* copy tx data to local buffer */
comBufIt += MIN( txLen, (ST25R3916_BUF_LEN - comBufIt) ); /* store position on local buffer */
if( last && txOnly ) /* only perform SPI transaction if no Rx will follow */
{
platformSpiTxRx( comBuf, NULL, comBufIt );
}
#else
platformSpiTxRx( txBuf, NULL, txLen );
#endif /* ST25R_COM_SINGLETXRX */
#endif /* RFAL_USE_I2C */
}
}
/*******************************************************************************/
static void st25r3916comRx( uint8_t* rxBuf, uint16_t rxLen )
{
if( rxLen > 0U )
{
#ifdef RFAL_USE_I2C
platformI2CRx( rxBuf, rxLen );
#else /* RFAL_USE_I2C */
#ifdef ST25R_COM_SINGLETXRX
ST_MEMSET( &comBuf[comBufIt], 0x00, MIN( rxLen, (ST25R3916_BUF_LEN - comBufIt) ) ); /* clear outgoing buffer */
platformSpiTxRx( comBuf, comBuf, MIN( (comBufIt + rxLen), ST25R3916_BUF_LEN ) ); /* transceive as a single SPI call */
ST_MEMCPY( rxBuf, &comBuf[comBufIt], MIN( rxLen, (ST25R3916_BUF_LEN - comBufIt) ) ); /* copy from local buf to output buffer and skip cmd byte */
#else
if( rxBuf != NULL)
{
ST_MEMSET( rxBuf, 0x00, rxLen ); /* clear outgoing buffer */
}
platformSpiTxRx( NULL, rxBuf, rxLen );
#endif /* ST25R_COM_SINGLETXRX */
#endif /* RFAL_USE_I2C */
}
}
/*******************************************************************************/
static void st25r3916comTxByte( uint8_t txByte, bool last, bool txOnly )
{
uint8_t val = txByte; /* MISRA 17.8: use intermediate variable */
st25r3916comTx( &val, ST25R3916_REG_LEN, last, txOnly );
}
/*
******************************************************************************
* GLOBAL FUNCTIONS
******************************************************************************
*/
/*******************************************************************************/
ReturnCode st25r3916ReadRegister( uint8_t reg, uint8_t* val )
{
return st25r3916ReadMultipleRegisters( reg, val, ST25R3916_REG_LEN );
}
/*******************************************************************************/
ReturnCode st25r3916ReadMultipleRegisters( uint8_t reg, uint8_t* values, uint8_t length )
{
if( length > 0U )
{
st25r3916comStart();
/* If is a space-B register send a direct command first */
if( (reg & ST25R3916_SPACE_B) != 0U )
{
st25r3916comTxByte( ST25R3916_CMD_SPACE_B_ACCESS, false, false );
}
st25r3916comTxByte( ((reg & ~ST25R3916_SPACE_B) | ST25R3916_READ_MODE), true, false );
st25r3916comRepeatStart();
st25r3916comRx( values, length );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WriteRegister( uint8_t reg, uint8_t val )
{
uint8_t value = val; /* MISRA 17.8: use intermediate variable */
return st25r3916WriteMultipleRegisters( reg, &value, ST25R3916_REG_LEN );
}
/*******************************************************************************/
ReturnCode st25r3916WriteMultipleRegisters( uint8_t reg, const uint8_t* values, uint8_t length )
{
if( length > 0U )
{
st25r3916comStart();
if( (reg & ST25R3916_SPACE_B) != 0U )
{
st25r3916comTxByte( ST25R3916_CMD_SPACE_B_ACCESS, false, true );
}
st25r3916comTxByte( ((reg & ~ST25R3916_SPACE_B) | ST25R3916_WRITE_MODE), false, true );
st25r3916comTx( values, length, true, true );
st25r3916comStop();
/* Send a WriteMultiReg event to LED handling */
st25r3916ledEvtWrMultiReg( reg, values, length);
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WriteFifo( const uint8_t* values, uint16_t length )
{
if( length > ST25R3916_FIFO_DEPTH )
{
return ERR_PARAM;
}
if( length > 0U )
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_FIFO_LOAD, false, true );
st25r3916comTx( values, length, true, true );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916ReadFifo( uint8_t* buf, uint16_t length )
{
if( length > 0U )
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_FIFO_READ, true, false );
st25r3916comRepeatStart();
st25r3916comRx( buf, length );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WritePTMem( const uint8_t* values, uint16_t length )
{
if( length > ST25R3916_PTM_LEN )
{
return ERR_PARAM;
}
if( length > 0U )
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_PT_A_CONFIG_LOAD, false, true );
st25r3916comTx( values, length, true, true );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916ReadPTMem( uint8_t* values, uint16_t length )
{
uint8_t tmp[ST25R3916_REG_LEN + ST25R3916_PTM_LEN]; /* local buffer to handle prepended byte on I2C and SPI */
if( length > 0U )
{
if( length > ST25R3916_PTM_LEN )
{
return ERR_PARAM;
}
st25r3916comStart();
st25r3916comTxByte( ST25R3916_PT_MEM_READ, true, false );
st25r3916comRepeatStart();
st25r3916comRx( tmp, (ST25R3916_REG_LEN + length) ); /* skip prepended byte */
st25r3916comStop();
/* Copy PTMem content without prepended byte */
ST_MEMCPY( values, (tmp+ST25R3916_REG_LEN), length );
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WritePTMemF( const uint8_t* values, uint16_t length )
{
if( length > (ST25R3916_PTM_F_LEN + ST25R3916_PTM_TSN_LEN) )
{
return ERR_PARAM;
}
if( length > 0U )
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_PT_F_CONFIG_LOAD, false, true );
st25r3916comTx( values, length, true, true );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WritePTMemTSN( const uint8_t* values, uint16_t length )
{
if( length > ST25R3916_PTM_TSN_LEN )
{
return ERR_PARAM;
}
if(length > 0U)
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_PT_TSN_DATA_LOAD, false, true );
st25r3916comTx( values, length, true, true );
st25r3916comStop();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916ExecuteCommand( uint8_t cmd )
{
st25r3916comStart();
st25r3916comTxByte( (cmd | ST25R3916_CMD_MODE ), true, true );
st25r3916comStop();
/* Send a cmd event to LED handling */
st25r3916ledEvtCmd(cmd);
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916ReadTestRegister( uint8_t reg, uint8_t* val )
{
st25r3916comStart();
st25r3916comTxByte( ST25R3916_CMD_TEST_ACCESS, false, false );
st25r3916comTxByte( (reg | ST25R3916_READ_MODE), true, false );
st25r3916comRepeatStart();
st25r3916comRx( val, ST25R3916_REG_LEN );
st25r3916comStop();
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916WriteTestRegister( uint8_t reg, uint8_t val )
{
uint8_t value = val; /* MISRA 17.8: use intermediate variable */
st25r3916comStart();
st25r3916comTxByte( ST25R3916_CMD_TEST_ACCESS, false, true );
st25r3916comTxByte( (reg | ST25R3916_WRITE_MODE), false, true );
st25r3916comTx( &value, ST25R3916_REG_LEN, true, true );
st25r3916comStop();
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916ClrRegisterBits( uint8_t reg, uint8_t clr_mask )
{
ReturnCode ret;
uint8_t rdVal;
/* Read current reg value */
EXIT_ON_ERR( ret, st25r3916ReadRegister(reg, &rdVal) );
/* Only perform a Write if value to be written is different */
if( ST25R3916_OPTIMIZE && (rdVal == (uint8_t)(rdVal & ~clr_mask)) )
{
return ERR_NONE;
}
/* Write new reg value */
return st25r3916WriteRegister(reg, (uint8_t)(rdVal & ~clr_mask) );
}
/*******************************************************************************/
ReturnCode st25r3916SetRegisterBits( uint8_t reg, uint8_t set_mask )
{
ReturnCode ret;
uint8_t rdVal;
/* Read current reg value */
EXIT_ON_ERR( ret, st25r3916ReadRegister(reg, &rdVal) );
/* Only perform a Write if the value to be written is different */
if( ST25R3916_OPTIMIZE && (rdVal == (rdVal | set_mask)) )
{
return ERR_NONE;
}
/* Write new reg value */
return st25r3916WriteRegister(reg, (rdVal | set_mask) );
}
/*******************************************************************************/
ReturnCode st25r3916ChangeRegisterBits( uint8_t reg, uint8_t valueMask, uint8_t value )
{
return st25r3916ModifyRegister(reg, valueMask, (valueMask & value) );
}
/*******************************************************************************/
ReturnCode st25r3916ModifyRegister( uint8_t reg, uint8_t clr_mask, uint8_t set_mask )
{
ReturnCode ret;
uint8_t rdVal;
uint8_t wrVal;
/* Read current reg value */
EXIT_ON_ERR( ret, st25r3916ReadRegister(reg, &rdVal) );
/* Compute new value */
wrVal = (uint8_t)(rdVal & ~clr_mask);
wrVal |= set_mask;
/* Only perform a Write if the value to be written is different */
if( ST25R3916_OPTIMIZE && (rdVal == wrVal) )
{
return ERR_NONE;
}
/* Write new reg value */
return st25r3916WriteRegister(reg, wrVal );
}
/*******************************************************************************/
ReturnCode st25r3916ChangeTestRegisterBits( uint8_t reg, uint8_t valueMask, uint8_t value )
{
ReturnCode ret;
uint8_t rdVal;
uint8_t wrVal;
/* Read current reg value */
EXIT_ON_ERR( ret, st25r3916ReadTestRegister(reg, &rdVal) );
/* Compute new value */
wrVal = (uint8_t)(rdVal & ~valueMask);
wrVal |= (uint8_t)(value & valueMask);
/* Only perform a Write if the value to be written is different */
if( ST25R3916_OPTIMIZE && (rdVal == wrVal) )
{
return ERR_NONE;
}
/* Write new reg value */
return st25r3916WriteTestRegister(reg, wrVal );
}
/*******************************************************************************/
bool st25r3916CheckReg( uint8_t reg, uint8_t mask, uint8_t val )
{
uint8_t regVal;
regVal = 0;
st25r3916ReadRegister( reg, &regVal );
return ( (regVal & mask) == val );
}
/*******************************************************************************/
bool st25r3916IsRegValid( uint8_t reg )
{
if( !(( (int16_t)reg >= (int16_t)ST25R3916_REG_IO_CONF1) && (reg <= (ST25R3916_SPACE_B | ST25R3916_REG_IC_IDENTITY)) ))
{
return false;
}
return true;
}
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