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flipperzero-firmware/lib/ST25RFAL002/source/st25r3916/st25r3916.c

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NFC: application + rfal + driver.
2020-10-18 22:09:48 +00:00
/******************************************************************************
* \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 ST25R3916 high level interface
*
*/
/*
******************************************************************************
* INCLUDES
******************************************************************************
*/
#include "st25r3916.h"
#include "st25r3916_com.h"
#include "st25r3916_led.h"
#include "st25r3916_irq.h"
#include "utils.h"
/*
******************************************************************************
* LOCAL DEFINES
******************************************************************************
*/
#define ST25R3916_SUPPLY_THRESHOLD 3600U /*!< Power supply measure threshold between 3.3V or 5V */
#define ST25R3916_NRT_MAX 0xFFFFU /*!< Max Register value of NRT */
#define ST25R3916_TOUT_MEASURE_VDD 100U /*!< Max duration time of Measure Power Supply command Datasheet: 25us */
#define ST25R3916_TOUT_MEASURE_AMPLITUDE 10U /*!< Max duration time of Measure Amplitude command Datasheet: 25us */
#define ST25R3916_TOUT_MEASURE_PHASE 10U /*!< Max duration time of Measure Phase command Datasheet: 25us */
#define ST25R3916_TOUT_MEASURE_CAPACITANCE 10U /*!< Max duration time of Measure Capacitance command Datasheet: 25us */
#define ST25R3916_TOUT_CALIBRATE_CAP_SENSOR 4U /*!< Max duration Calibrate Capacitive Sensor command Datasheet: 3ms */
#define ST25R3916_TOUT_ADJUST_REGULATORS 6U /*!< Max duration time of Adjust Regulators command Datasheet: 5ms */
#define ST25R3916_TOUT_CA 10U /*!< Max duration time of Collision Avoidance command */
#define ST25R3916_TEST_REG_PATTERN 0x33U /*!< Register Read Write test pattern used during selftest */
#define ST25R3916_TEST_WU_TOUT 12U /*!< Timeout used on WU timer during self test */
#define ST25R3916_TEST_TMR_TOUT 20U /*!< Timeout used during self test */
#define ST25R3916_TEST_TMR_TOUT_DELTA 2U /*!< Timeout used during self test */
#define ST25R3916_TEST_TMR_TOUT_8FC (ST25R3916_TEST_TMR_TOUT * 16950U) /*!< Timeout in 8/fc */
/*
******************************************************************************
* LOCAL CONSTANTS
******************************************************************************
*/
/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/
static uint32_t gST25R3916NRT_64fcs;
/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
/*
******************************************************************************
* LOCAL FUNCTION
******************************************************************************
*/
ReturnCode st25r3916ExecuteCommandAndGetResult( uint8_t cmd, uint8_t resReg, uint8_t tout, uint8_t* result )
{
/* Clear and enable Direct Command interrupt */
st25r3916GetInterrupt( ST25R3916_IRQ_MASK_DCT );
st25r3916EnableInterrupts( ST25R3916_IRQ_MASK_DCT );
st25r3916ExecuteCommand( cmd );
st25r3916WaitForInterruptsTimed( ST25R3916_IRQ_MASK_DCT, tout );
st25r3916DisableInterrupts( ST25R3916_IRQ_MASK_DCT );
/* After execution read out the result if the pointer is not NULL */
if( result != NULL )
{
st25r3916ReadRegister( resReg, result);
}
return ERR_NONE;
}
/*
******************************************************************************
* GLOBAL FUNCTIONS
******************************************************************************
*/
ReturnCode st25r3916Initialize( void )
{
uint16_t vdd_mV;
ReturnCode ret;
/* Set default state on the ST25R3916 */
st25r3916ExecuteCommand( ST25R3916_CMD_SET_DEFAULT );
#ifndef RFAL_USE_I2C
/* Increase MISO driving level as SPI can go up to 10MHz */
st25r3916WriteRegister(ST25R3916_REG_IO_CONF2, ST25R3916_REG_IO_CONF2_io_drv_lvl);
#endif /* RFAL_USE_I2C */
if( !st25r3916CheckChipID( NULL ) )
{
platformErrorHandle();
return ERR_HW_MISMATCH;
}
st25r3916InitInterrupts();
st25r3916ledInit();
gST25R3916NRT_64fcs = 0;
#ifndef RFAL_USE_I2C
/* Enable pull downs on MISO line */
st25r3916SetRegisterBits(ST25R3916_REG_IO_CONF2, ( ST25R3916_REG_IO_CONF2_miso_pd1 | ST25R3916_REG_IO_CONF2_miso_pd2 ) );
#endif /* RFAL_USE_I2C */
/* Disable internal overheat protection */
st25r3916ChangeTestRegisterBits( 0x04, 0x10, 0x10 );
#ifdef ST25R_SELFTEST
/******************************************************************************
* Check communication interface:
* - write a pattern in a register
* - reads back the register value
* - return ERR_IO in case the read value is different
*/
st25r3916WriteRegister( ST25R3916_REG_BIT_RATE, ST25R3916_TEST_REG_PATTERN );
if( !st25r3916CheckReg( ST25R3916_REG_BIT_RATE, (ST25R3916_REG_BIT_RATE_rxrate_mask | ST25R3916_REG_BIT_RATE_txrate_mask), ST25R3916_TEST_REG_PATTERN ) )
{
platformErrorHandle();
return ERR_IO;
}
/* Restore default value */
st25r3916WriteRegister( ST25R3916_REG_BIT_RATE, 0x00 );
/*
* Check IRQ Handling:
* - use the Wake-up timer to trigger an IRQ
* - wait the Wake-up timer interrupt
* - return ERR_TIMEOUT when the Wake-up timer interrupt is not received
*/
st25r3916WriteRegister( ST25R3916_REG_WUP_TIMER_CONTROL, ST25R3916_REG_WUP_TIMER_CONTROL_wur|ST25R3916_REG_WUP_TIMER_CONTROL_wto);
st25r3916EnableInterrupts( ST25R3916_IRQ_MASK_WT );
st25r3916ExecuteCommand( ST25R3916_CMD_START_WUP_TIMER );
if(st25r3916WaitForInterruptsTimed(ST25R3916_IRQ_MASK_WT, ST25R3916_TEST_WU_TOUT) == 0U )
{
platformErrorHandle();
return ERR_TIMEOUT;
}
st25r3916DisableInterrupts( ST25R3916_IRQ_MASK_WT );
st25r3916WriteRegister( ST25R3916_REG_WUP_TIMER_CONTROL, 0U );
/*******************************************************************************/
#endif /* ST25R_SELFTEST */
/* Enable Oscillator and wait until it gets stable */
ret = st25r3916OscOn();
if( ret != ERR_NONE )
{
platformErrorHandle();
return ret;
}
/* Measure VDD and set sup3V bit according to Power supplied */
vdd_mV = st25r3916MeasureVoltage( ST25R3916_REG_REGULATOR_CONTROL_mpsv_vdd );
st25r3916ChangeRegisterBits( ST25R3916_REG_IO_CONF2, ST25R3916_REG_IO_CONF2_sup3V, ((vdd_mV < ST25R3916_SUPPLY_THRESHOLD) ? ST25R3916_REG_IO_CONF2_sup3V_3V : ST25R3916_REG_IO_CONF2_sup3V_5V) );
/* Make sure Transmitter and Receiver are disabled */
st25r3916TxRxOff();
#ifdef ST25R_SELFTEST_TIMER
/******************************************************************************
* Check SW timer operation :
* - use the General Purpose timer to measure an amount of time
* - test whether an interrupt is seen when less time was given
* - test whether an interrupt is seen when sufficient time was given
*/
st25r3916EnableInterrupts( ST25R3916_IRQ_MASK_GPE );
st25r3916SetStartGPTimer( (uint16_t)ST25R3916_TEST_TMR_TOUT_8FC, ST25R3916_REG_TIMER_EMV_CONTROL_gptc_no_trigger);
if( st25r3916WaitForInterruptsTimed( ST25R3916_IRQ_MASK_GPE, (ST25R3916_TEST_TMR_TOUT - ST25R3916_TEST_TMR_TOUT_DELTA)) != 0U )
{
platformErrorHandle();
return ERR_SYSTEM;
}
/* Stop all activities to stop the GP timer */
st25r3916ExecuteCommand( ST25R3916_CMD_STOP );
st25r3916ClearAndEnableInterrupts( ST25R3916_IRQ_MASK_GPE );
st25r3916SetStartGPTimer( (uint16_t)ST25R3916_TEST_TMR_TOUT_8FC, ST25R3916_REG_TIMER_EMV_CONTROL_gptc_no_trigger );
if(st25r3916WaitForInterruptsTimed( ST25R3916_IRQ_MASK_GPE, (ST25R3916_TEST_TMR_TOUT + ST25R3916_TEST_TMR_TOUT_DELTA)) == 0U )
{
platformErrorHandle();
return ERR_SYSTEM;
}
/* Stop all activities to stop the GP timer */
st25r3916ExecuteCommand( ST25R3916_CMD_STOP );
/*******************************************************************************/
#endif /* ST25R_SELFTEST_TIMER */
/* After reset all interrupts are enabled, so disable them at first */
st25r3916DisableInterrupts( ST25R3916_IRQ_MASK_ALL );
/* And clear them, just to be sure */
st25r3916ClearInterrupts();
return ERR_NONE;
}
/*******************************************************************************/
void st25r3916Deinitialize( void )
{
st25r3916DisableInterrupts( ST25R3916_IRQ_MASK_ALL );
/* Disabe Tx and Rx, Keep OSC On */
st25r3916TxRxOff();
return;
}
/*******************************************************************************/
ReturnCode st25r3916OscOn( void )
{
/* Check if oscillator is already turned on and stable */
/* Use ST25R3916_REG_OP_CONTROL_en instead of ST25R3916_REG_AUX_DISPLAY_osc_ok to be on the safe side */
if( !st25r3916CheckReg( ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_en, ST25R3916_REG_OP_CONTROL_en ) )
{
/* Clear any eventual previous oscillator IRQ */
st25r3916GetInterrupt( ST25R3916_IRQ_MASK_OSC );
/* Enable oscillator frequency stable interrupt */
st25r3916EnableInterrupts( ST25R3916_IRQ_MASK_OSC );
/* Enable oscillator and regulator output */
st25r3916SetRegisterBits( ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_en );
/* Wait for the oscillator interrupt */
st25r3916WaitForInterruptsTimed( ST25R3916_IRQ_MASK_OSC, ST25R3916_TOUT_OSC_STABLE );
st25r3916DisableInterrupts( ST25R3916_IRQ_MASK_OSC );
}
if( !st25r3916CheckReg( ST25R3916_REG_AUX_DISPLAY, ST25R3916_REG_AUX_DISPLAY_osc_ok, ST25R3916_REG_AUX_DISPLAY_osc_ok ) )
{
return ERR_SYSTEM;
}
return ERR_NONE;
}
/*******************************************************************************/
uint8_t st25r3916MeasurePowerSupply( uint8_t mpsv )
{
uint8_t result;
/* Set the source of direct command: Measure Power Supply Voltage */
st25r3916ChangeRegisterBits( ST25R3916_REG_REGULATOR_CONTROL, ST25R3916_REG_REGULATOR_CONTROL_mpsv_mask, mpsv );
/* Execute command: Measure Power Supply Voltage */
st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_MEASURE_VDD, ST25R3916_REG_AD_RESULT, ST25R3916_TOUT_MEASURE_VDD, &result);
return result;
}
/*******************************************************************************/
uint16_t st25r3916MeasureVoltage( uint8_t mpsv )
{
uint8_t result;
uint16_t mV;
result = st25r3916MeasurePowerSupply(mpsv);
/* Convert cmd output into mV (each step represents 23.4 mV )*/
mV = ((uint16_t)result) * 23U;
mV += (((((uint16_t)result) * 4U) + 5U) / 10U);
return mV;
}
/*******************************************************************************/
ReturnCode st25r3916AdjustRegulators( uint16_t* result_mV )
{
uint8_t result;
/* Reset logic and set regulated voltages to be defined by result of Adjust Regulators command */
st25r3916SetRegisterBits( ST25R3916_REG_REGULATOR_CONTROL, ST25R3916_REG_REGULATOR_CONTROL_reg_s );
st25r3916ClrRegisterBits( ST25R3916_REG_REGULATOR_CONTROL, ST25R3916_REG_REGULATOR_CONTROL_reg_s );
/* Execute Adjust regulators cmd and retrieve result */
st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_ADJUST_REGULATORS, ST25R3916_REG_REGULATOR_RESULT, ST25R3916_TOUT_ADJUST_REGULATORS, &result );
/* Calculate result in mV */
result >>= ST25R3916_REG_REGULATOR_RESULT_reg_shift;
if( result_mV != NULL )
{
if( st25r3916CheckReg( ST25R3916_REG_IO_CONF2, ST25R3916_REG_IO_CONF2_sup3V, ST25R3916_REG_IO_CONF2_sup3V ) )
{
result = MIN( result, (uint8_t)(result-5U) );/* In 3.3V mode [0,4] are not used */
*result_mV = 2400U; /* Minimum regulated voltage 2.4V in case of 3.3V supply */
}
else
{
*result_mV = 3600U; /* Minimum regulated voltage 3.6V in case of 5V supply */
}
*result_mV += (uint16_t)result * 100U; /* 100mV steps in both 3.3V and 5V supply */
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916MeasureAmplitude( uint8_t* result )
{
return st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_MEASURE_AMPLITUDE, ST25R3916_REG_AD_RESULT, ST25R3916_TOUT_MEASURE_AMPLITUDE, result );
}
/*******************************************************************************/
ReturnCode st25r3916MeasurePhase( uint8_t* result )
{
return st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_MEASURE_PHASE, ST25R3916_REG_AD_RESULT, ST25R3916_TOUT_MEASURE_PHASE, result );
}
/*******************************************************************************/
ReturnCode st25r3916MeasureCapacitance( uint8_t* result )
{
return st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_MEASURE_CAPACITANCE, ST25R3916_REG_AD_RESULT, ST25R3916_TOUT_MEASURE_CAPACITANCE, result );
}
/*******************************************************************************/
ReturnCode st25r3916CalibrateCapacitiveSensor( uint8_t* result )
{
ReturnCode ret;
uint8_t res;
/* Clear Manual calibration values to enable automatic calibration mode */
st25r3916ClrRegisterBits( ST25R3916_REG_CAP_SENSOR_CONTROL, ST25R3916_REG_CAP_SENSOR_CONTROL_cs_mcal_mask );
/* Execute automatic calibration */
ret = st25r3916ExecuteCommandAndGetResult( ST25R3916_CMD_CALIBRATE_C_SENSOR, ST25R3916_REG_CAP_SENSOR_RESULT, ST25R3916_TOUT_CALIBRATE_CAP_SENSOR, &res );
/* Check wether the calibration was successull */
if( ((res & ST25R3916_REG_CAP_SENSOR_RESULT_cs_cal_end) != ST25R3916_REG_CAP_SENSOR_RESULT_cs_cal_end) ||
((res & ST25R3916_REG_CAP_SENSOR_RESULT_cs_cal_err) == ST25R3916_REG_CAP_SENSOR_RESULT_cs_cal_err) || (ret != ERR_NONE) )
{
return ERR_IO;
}
if( result != NULL )
{
(*result) = (uint8_t)(res >> ST25R3916_REG_CAP_SENSOR_RESULT_cs_cal_shift);
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916SetBitrate(uint8_t txrate, uint8_t rxrate)
{
uint8_t reg;
st25r3916ReadRegister( ST25R3916_REG_BIT_RATE, &reg );
if( rxrate != ST25R3916_BR_DO_NOT_SET )
{
if(rxrate > ST25R3916_BR_848)
{
return ERR_PARAM;
}
reg = (uint8_t)(reg & ~ST25R3916_REG_BIT_RATE_rxrate_mask); /* MISRA 10.3 */
reg |= rxrate << ST25R3916_REG_BIT_RATE_rxrate_shift;
}
if( txrate != ST25R3916_BR_DO_NOT_SET )
{
if(txrate > ST25R3916_BR_6780)
{
return ERR_PARAM;
}
reg = (uint8_t)(reg & ~ST25R3916_REG_BIT_RATE_txrate_mask); /* MISRA 10.3 */
reg |= txrate<<ST25R3916_REG_BIT_RATE_txrate_shift;
}
return st25r3916WriteRegister( ST25R3916_REG_BIT_RATE, reg );
}
/*******************************************************************************/
ReturnCode st25r3916PerformCollisionAvoidance( uint8_t FieldONCmd, uint8_t pdThreshold, uint8_t caThreshold, uint8_t nTRFW )
{
uint8_t treMask;
uint32_t irqs;
ReturnCode err;
if( (FieldONCmd != ST25R3916_CMD_INITIAL_RF_COLLISION) && (FieldONCmd != ST25R3916_CMD_RESPONSE_RF_COLLISION_N) )
{
return ERR_PARAM;
}
err = ERR_INTERNAL;
/* Check if new thresholds are to be applied */
if( (pdThreshold != ST25R3916_THRESHOLD_DO_NOT_SET) || (caThreshold != ST25R3916_THRESHOLD_DO_NOT_SET) )
{
treMask = 0;
if(pdThreshold != ST25R3916_THRESHOLD_DO_NOT_SET)
{
treMask |= ST25R3916_REG_FIELD_THRESHOLD_ACTV_trg_mask;
}
if(caThreshold != ST25R3916_THRESHOLD_DO_NOT_SET)
{
treMask |= ST25R3916_REG_FIELD_THRESHOLD_ACTV_rfe_mask;
}
/* Set Detection Threshold and|or Collision Avoidance Threshold */
st25r3916ChangeRegisterBits( ST25R3916_REG_FIELD_THRESHOLD_ACTV, treMask, (pdThreshold & ST25R3916_REG_FIELD_THRESHOLD_ACTV_trg_mask) | (caThreshold & ST25R3916_REG_FIELD_THRESHOLD_ACTV_rfe_mask ) );
}
/* Set n x TRFW */
st25r3916ChangeRegisterBits( ST25R3916_REG_AUX, ST25R3916_REG_AUX_nfc_n_mask, nTRFW );
/*******************************************************************************/
/* Enable and clear CA specific interrupts and execute command */
st25r3916GetInterrupt( (ST25R3916_IRQ_MASK_CAC | ST25R3916_IRQ_MASK_CAT | ST25R3916_IRQ_MASK_APON) );
st25r3916EnableInterrupts( (ST25R3916_IRQ_MASK_CAC | ST25R3916_IRQ_MASK_CAT | ST25R3916_IRQ_MASK_APON) );
st25r3916ExecuteCommand( FieldONCmd );
/*******************************************************************************/
/* Wait for initial APON interrupt, indicating anticollision avoidance done and ST25R3916's
* field is now on, or a CAC indicating a collision */
irqs = st25r3916WaitForInterruptsTimed( ( ST25R3916_IRQ_MASK_CAC | ST25R3916_IRQ_MASK_APON ), ST25R3916_TOUT_CA );
if( (ST25R3916_IRQ_MASK_CAC & irqs) != 0U ) /* Collision occurred */
{
err = ERR_RF_COLLISION;
}
else if( (ST25R3916_IRQ_MASK_APON & irqs) != 0U )
{
/* After APON wait for CAT interrupt, indication field was switched on minimum guard time has been fulfilled */
irqs = st25r3916WaitForInterruptsTimed( ( ST25R3916_IRQ_MASK_CAT ), ST25R3916_TOUT_CA );
if( (ST25R3916_IRQ_MASK_CAT & irqs) != 0U ) /* No Collision detected, Field On */
{
err = ERR_NONE;
}
}
else
{
/* MISRA 15.7 - Empty else */
}
/* Clear any previous External Field events and disable CA specific interrupts */
st25r3916GetInterrupt( (ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_EON) );
st25r3916DisableInterrupts( (ST25R3916_IRQ_MASK_CAC | ST25R3916_IRQ_MASK_CAT | ST25R3916_IRQ_MASK_APON) );
return err;
}
/*******************************************************************************/
void st25r3916SetNumTxBits( uint16_t nBits )
{
st25r3916WriteRegister( ST25R3916_REG_NUM_TX_BYTES2, (uint8_t)((nBits >> 0) & 0xFFU) );
st25r3916WriteRegister( ST25R3916_REG_NUM_TX_BYTES1, (uint8_t)((nBits >> 8) & 0xFFU) );
}
/*******************************************************************************/
uint16_t st25r3916GetNumFIFOBytes( void )
{
uint8_t reg;
uint16_t result;
st25r3916ReadRegister( ST25R3916_REG_FIFO_STATUS2, &reg );
reg = ((reg & ST25R3916_REG_FIFO_STATUS2_fifo_b_mask) >> ST25R3916_REG_FIFO_STATUS2_fifo_b_shift);
result = ((uint16_t)reg << 8);
st25r3916ReadRegister( ST25R3916_REG_FIFO_STATUS1, &reg );
result |= (((uint16_t)reg) & 0x00FFU);
return result;
}
/*******************************************************************************/
uint8_t st25r3916GetNumFIFOLastBits( void )
{
uint8_t reg;
st25r3916ReadRegister( ST25R3916_REG_FIFO_STATUS2, &reg );
return ((reg & ST25R3916_REG_FIFO_STATUS2_fifo_lb_mask) >> ST25R3916_REG_FIFO_STATUS2_fifo_lb_shift);
}
/*******************************************************************************/
uint32_t st25r3916GetNoResponseTime( void )
{
return gST25R3916NRT_64fcs;
}
/*******************************************************************************/
ReturnCode st25r3916SetNoResponseTime( uint32_t nrt_64fcs )
{
ReturnCode err;
uint8_t nrt_step;
uint32_t tmpNRT;
tmpNRT = nrt_64fcs; /* MISRA 17.8 */
err = ERR_NONE;
gST25R3916NRT_64fcs = tmpNRT; /* Store given NRT value in 64/fc into local var */
nrt_step = ST25R3916_REG_TIMER_EMV_CONTROL_nrt_step_64fc; /* Set default NRT in steps of 64/fc */
if( tmpNRT > ST25R3916_NRT_MAX ) /* Check if the given NRT value fits using 64/fc steps */
{
nrt_step = ST25R3916_REG_TIMER_EMV_CONTROL_nrt_step_4096_fc; /* If not, change NRT set to 4096/fc */
tmpNRT = ((tmpNRT + 63U) / 64U); /* Calculate number of steps in 4096/fc */
if( tmpNRT > ST25R3916_NRT_MAX ) /* Check if the NRT value fits using 64/fc steps */
{
tmpNRT = ST25R3916_NRT_MAX; /* Assign the maximum possible */
err = ERR_PARAM; /* Signal parameter error */
}
gST25R3916NRT_64fcs = (64U * tmpNRT);
}
/* Set the ST25R3916 NRT step units and the value */
st25r3916ChangeRegisterBits( ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_nrt_step, nrt_step );
st25r3916WriteRegister( ST25R3916_REG_NO_RESPONSE_TIMER1, (uint8_t)(tmpNRT >> 8U) );
st25r3916WriteRegister( ST25R3916_REG_NO_RESPONSE_TIMER2, (uint8_t)(tmpNRT & 0xFFU) );
return err;
}
/*******************************************************************************/
ReturnCode st25r3916SetStartNoResponseTimer( uint32_t nrt_64fcs )
{
ReturnCode err;
err = st25r3916SetNoResponseTime( nrt_64fcs );
if(err == ERR_NONE)
{
st25r3916ExecuteCommand( ST25R3916_CMD_START_NO_RESPONSE_TIMER );
}
return err;
}
/*******************************************************************************/
void st25r3916SetGPTime( uint16_t gpt_8fcs )
{
st25r3916WriteRegister( ST25R3916_REG_GPT1, (uint8_t)(gpt_8fcs >> 8) );
st25r3916WriteRegister( ST25R3916_REG_GPT2, (uint8_t)(gpt_8fcs & 0xFFU) );
}
/*******************************************************************************/
ReturnCode st25r3916SetStartGPTimer( uint16_t gpt_8fcs, uint8_t trigger_source )
{
st25r3916SetGPTime( gpt_8fcs );
st25r3916ChangeRegisterBits( ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_gptc_mask, trigger_source );
/* If there's no trigger source, start GPT immediately */
if( trigger_source == ST25R3916_REG_TIMER_EMV_CONTROL_gptc_no_trigger )
{
st25r3916ExecuteCommand( ST25R3916_CMD_START_GP_TIMER );
}
return ERR_NONE;
}
/*******************************************************************************/
bool st25r3916CheckChipID( uint8_t *rev )
{
uint8_t ID;
ID = 0;
st25r3916ReadRegister( ST25R3916_REG_IC_IDENTITY, &ID );
/* Check if IC Identity Register contains ST25R3916's IC type code */
if( (ID & ST25R3916_REG_IC_IDENTITY_ic_type_mask) != ST25R3916_REG_IC_IDENTITY_ic_type_st25r3916 )
{
return false;
}
if(rev != NULL)
{
*rev = (ID & ST25R3916_REG_IC_IDENTITY_ic_rev_mask);
}
return true;
}
/*******************************************************************************/
ReturnCode st25r3916GetRegsDump( t_st25r3916Regs* regDump )
{
uint8_t regIt;
if(regDump == NULL)
{
return ERR_PARAM;
}
/* Dump Registers on space A */
for( regIt = ST25R3916_REG_IO_CONF1; regIt <= ST25R3916_REG_IC_IDENTITY; regIt++ )
{
st25r3916ReadRegister(regIt, &regDump->RsA[regIt] );
}
regIt = 0;
/* Read non-consecutive Registers on space B */
st25r3916ReadRegister( ST25R3916_REG_EMD_SUP_CONF, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_SUBC_START_TIME, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_P2P_RX_CONF, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_CORR_CONF1, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_CORR_CONF2, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_SQUELCH_TIMER, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_FIELD_ON_GT, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_AUX_MOD, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_TX_DRIVER_TIMING, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_RES_AM_MOD, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_TX_DRIVER_STATUS, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_REGULATOR_RESULT, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_OVERSHOOT_CONF1, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_OVERSHOOT_CONF2, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_UNDERSHOOT_CONF1, &regDump->RsB[regIt++] );
st25r3916ReadRegister( ST25R3916_REG_UNDERSHOOT_CONF2, &regDump->RsB[regIt++] );
return ERR_NONE;
}
/*******************************************************************************/
bool st25r3916IsCmdValid( uint8_t cmd )
{
if( !((cmd >= ST25R3916_CMD_SET_DEFAULT) && (cmd <= ST25R3916_CMD_RESPONSE_RF_COLLISION_N)) &&
!((cmd >= ST25R3916_CMD_GOTO_SENSE) && (cmd <= ST25R3916_CMD_GOTO_SLEEP)) &&
!((cmd >= ST25R3916_CMD_MASK_RECEIVE_DATA) && (cmd <= ST25R3916_CMD_MEASURE_AMPLITUDE)) &&
!((cmd >= ST25R3916_CMD_RESET_RXGAIN) && (cmd <= ST25R3916_CMD_ADJUST_REGULATORS)) &&
!((cmd >= ST25R3916_CMD_CALIBRATE_DRIVER_TIMING) && (cmd <= ST25R3916_CMD_START_PPON2_TIMER)) &&
(cmd != ST25R3916_CMD_SPACE_B_ACCESS) && (cmd != ST25R3916_CMD_STOP_NRT) )
{
return false;
}
return true;
}
/*******************************************************************************/
ReturnCode st25r3916StreamConfigure(const struct st25r3916StreamConfig *config)
{
uint8_t smd;
uint8_t mode;
smd = 0;
if( config->useBPSK != 0U )
{
mode = ST25R3916_REG_MODE_om_bpsk_stream;
if( (config->din<2U) || (config->din>4U) ) /* not in fc/4 .. fc/16 */
{
return ERR_PARAM;
}
smd |= ((4U - config->din) << ST25R3916_REG_STREAM_MODE_scf_shift);
}
else
{
mode = ST25R3916_REG_MODE_om_subcarrier_stream;
if( (config->din<3U) || (config->din>6U) ) /* not in fc/8 .. fc/64 */
{
return ERR_PARAM;
}
smd |= ((6U - config->din) << ST25R3916_REG_STREAM_MODE_scf_shift);
if( config->report_period_length == 0U )
{
return ERR_PARAM;
}
}
if( (config->dout<1U) || (config->dout>7U) ) /* not in fc/2 .. fc/128 */
{
return ERR_PARAM;
}
smd |= (7U - config->dout) << ST25R3916_REG_STREAM_MODE_stx_shift;
if( config->report_period_length > 3U )
{
return ERR_PARAM;
}
smd |= (config->report_period_length << ST25R3916_REG_STREAM_MODE_scp_shift);
st25r3916WriteRegister(ST25R3916_REG_STREAM_MODE, smd);
st25r3916ChangeRegisterBits(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_mask, mode);
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode st25r3916GetRSSI( uint16_t *amRssi, uint16_t *pmRssi )
{
/*******************************************************************************/
/* MISRA 8.9 An object should be defined at block scope if its identifier only appears in a single function */
/*< ST25R3916 RSSI Display Reg values: 0 1 2 3 4 5 6 7 8 9 a b c d e f */
static const uint16_t st25r3916Rssi2mV[] = { 0 ,20 ,27 ,37 ,52 ,72 ,99 ,136 ,190 ,262 ,357 ,500 ,686 ,950, 1150, 1150 };
/* ST25R3916 2/3 stage gain reduction [dB] 0 0 0 0 0 3 6 9 12 15 18 na na na na na */
static const uint16_t st25r3916Gain2Percent[] = { 100, 100, 100, 100, 100, 141, 200, 281, 398, 562, 794, 1, 1, 1, 1, 1 };
/*******************************************************************************/
uint8_t rssi;
uint8_t gainRed;
st25r3916ReadRegister( ST25R3916_REG_RSSI_RESULT, &rssi );
st25r3916ReadRegister( ST25R3916_REG_GAIN_RED_STATE, &gainRed );
if( amRssi != NULL )
{
*amRssi = (uint16_t) ( ( (uint32_t)st25r3916Rssi2mV[ (rssi >> ST25R3916_REG_RSSI_RESULT_rssi_am_shift) ] * (uint32_t)st25r3916Gain2Percent[ (gainRed >> ST25R3916_REG_GAIN_RED_STATE_gs_am_shift) ] ) / 100U );
}
if( pmRssi != NULL )
{
*pmRssi = (uint16_t) ( ( (uint32_t)st25r3916Rssi2mV[ (rssi & ST25R3916_REG_RSSI_RESULT_rssi_pm_mask) ] * (uint32_t)st25r3916Gain2Percent[ (gainRed & ST25R3916_REG_GAIN_RED_STATE_gs_pm_mask) ] ) / 100U );
}
return ERR_NONE;
}
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