/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
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/**
 * @file n32g45x_tsc.c
 * @author Nations
 * @version v1.0.2
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "n32g45x.h"
#include "n32g45x_tsc.h"

/**
 * @brief  Init TSC config for hardware detect mode.
 * @param  TSC_Def Pointer of TSC register.
 * @param  CtrlCfg configurations.
 */
TSC_ErrorTypeDef TSC_Init(TSC_Module* TSC_Def, TSC_InitType* CtrlCfg)
{
    uint32_t tempreg,timeout;

    assert_param(IS_TSC_FILTER(CtrlCfg->TSC_FilterCount));
    assert_param(IS_TSC_DET_PERIOD(CtrlCfg->TSC_DetPeriod));

    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;
    
    /* waiting tsc hw for idle status.*/
    timeout = 0;
    do
    {
        __TSC_HW_DISABLE();
        
        if(++timeout > TSC_TIMEOUT)
            return TSC_ERROR_HW_MODE;
    }while (__TSC_GET_HW_MODE());

    /*TSC_CTRL config*/
    tempreg = 0;
    if(CtrlCfg->TSC_DetIntEnable)
        tempreg |= TSC_IT_DET_ENABLE;
    
    if(CtrlCfg->TSC_GreatEnable)
        tempreg |= TSC_DET_TYPE_GREAT;
    
    if(CtrlCfg->TSC_LessEnable)
        tempreg |= TSC_DET_TYPE_LESS;
    
    tempreg |= CtrlCfg->TSC_FilterCount;
    tempreg |= CtrlCfg->TSC_DetPeriod;

    TSC_Def->CTRL = tempreg;

    return TSC_ERROR_OK;
}

/**
 * @brief  Config the clock source of TSC 
 * @param  TSC_ClkSource specifies the clock source of TSC
 *   This parameter can be one of the following values:
 *     @arg TSC_CLK_SRC_LSI:              TSC clock source is LSI(default)
 *     @arg TSC_CLK_SRC_LSE:              TSC clock source is LSE,and LSE is oscillator
 *     @arg TSC_CLK_SRC_LSE_BYPASS:       TSC clock source is LSE,and LSE is extennal clock
 * @retval TSC error code
 */
TSC_ErrorTypeDef TSC_ClockConfig(uint32_t TSC_ClkSource)
{
    uint32_t timeout;
    
    /*Enable PWR  peripheral Clock*/
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR,ENABLE);

    if(TSC_CLK_SRC_LSI == TSC_ClkSource)
    {
        /*enable LSI clock*/
        RCC_EnableLsi(ENABLE);

        /*Wait LSI stable*/
        timeout = 0;
        while(RCC_GetFlagStatus(RCC_FLAG_LSIRD) == RESET)
        {
            if(++timeout >TSC_TIMEOUT)
                return TSC_ERROR_CLOCK;
        }
    }
    else if((TSC_CLK_SRC_LSE_BYPASS==TSC_ClkSource)||(TSC_CLK_SRC_LSE==TSC_ClkSource))
    {
        if(RCC_GetFlagStatus(RCC_FLAG_LSERD)==RESET)
        {
            // Set bit 8 of PWR_CTRL1.Open PWR DBP.
            PWR_BackupAccessEnable(ENABLE);
            RCC_ConfigLse(TSC_ClkSource);
            timeout = 0;
            while(RCC_GetFlagStatus(RCC_FLAG_LSERD) == RESET)
            {
                if(++timeout >TSC_TIMEOUT)
                    return TSC_ERROR_CLOCK;
            }
        }
    }
    else
        return TSC_ERROR_PARAMETER;
    
    /*Enable TSC clk*/
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_TSC,ENABLE);

    return TSC_ERROR_OK;
}

/**
 * @brief  Configure internal charge resistor for some channels 
 * @param  TSC_Def Pointer of TSC register.
 * @param  res:  internal resistor selecte
 *   This parameter can be one of the following values:
 *      @arg TSC_RESR_CHN_RESIST_0:    1M OHM
 *      @arg TSC_RESR_CHN_RESIST_1:    882K OHM 
 *      @arg TSC_RESR_CHN_RESIST_2:    756K OHM 
 *      @arg TSC_RESR_CHN_RESIST_3:    630K OHM 
 *      @arg TSC_RESR_CHN_RESIST_4:    504K OHM 
 *      @arg TSC_RESR_CHN_RESIST_5:    378K OHM
 *      @arg TSC_RESR_CHN_RESIST_6:    252K OHM 
 *      @arg TSC_RESR_CHN_RESIST_7:    126K OHM 
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 * @return: none
 */
TSC_ErrorTypeDef TSC_ConfigInternalResistor(TSC_Module* TSC_Def,uint32_t Channels, uint32_t res )
{
    uint32_t i,chn,timeout,*pReg,nPos;

    assert_param(IS_TSC_CHN(Channels));
    assert_param(IS_TSC_RESISTOR_VALUE(res));

    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;

    /*Check charge resistor value */
    if(res > TSC_RESR_CHN_RESIST_125K)
        return TSC_ERROR_PARAMETER;
    
    /* waiting tsc hw for idle status.*/
    timeout = 0;
    do
    {
        __TSC_HW_DISABLE();
        
        if(++timeout > TSC_TIMEOUT)
            return TSC_ERROR_HW_MODE;
    }while (__TSC_GET_HW_MODE());

    /* Mask invalie bits*/
    chn  = Channels & TSC_CHNEN_CHN_SEL_MASK;
    
    /* Set resistance for each channel one by one*/
    for (i = 0; i<MAX_TSC_HW_CHN; i++)
    {
        if (chn & 0x00000001)
        {
            pReg  = (uint32_t *)(&(TSC_Def->RESR0));
            pReg += (i/8);
            nPos  = (i & 0x7UL)*4;
            MODIFY_REG(*pReg,TSC_RESR_CHN_RESIST_MASK<<nPos,res<<nPos);
        }

        chn >>= 1;
    }

    return TSC_ERROR_OK;
}

/**
 * @brief  Configure threshold value for some channels 
 * @param  TSC_Def Pointer of TSC register.
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 * @param  base:   base value of threshold, 0-MAX_TSC_THRESHOLD_BASE
 * @param  delta:  delta value of threshold,0-MAX_TSC_THRESHOLD_DELRA
 * @return: None
 */
TSC_ErrorTypeDef TSC_ConfigThreshold(  TSC_Module* TSC_Def, uint32_t Channels, uint32_t base, uint32_t delta)
{
    uint32_t i, chn,timeout,*pReg;
    
    assert_param(IS_TSC_CHN(Channels));
    assert_param(IS_TSC_THRESHOLD_BASE(base));
    assert_param(IS_TSC_THRESHOLD_DELTA(delta));

    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;

    /*Check the base and delta value*/
    if( (base>MAX_TSC_THRESHOLD_BASE)||(delta>MAX_TSC_THRESHOLD_DELTA))
        return TSC_ERROR_PARAMETER;
    
    /* waiting tsc hw for idle status.*/
    timeout = 0;
    do
    {
        __TSC_HW_DISABLE();
        
        if(++timeout > TSC_TIMEOUT)
            return TSC_ERROR_HW_MODE;
    }while (__TSC_GET_HW_MODE());

    pReg = (uint32_t *)(&(TSC_Def->THRHD0));
    
    /*Mask invalie bits*/
    chn = Channels & TSC_CHNEN_CHN_SEL_MASK;
    
    /* Set the base and delta for each channnel one by one*/
    for (i = 0; i<MAX_TSC_HW_CHN; i++)
    {
        if (chn & 0x00000001)
        {
            pReg[i] = (base<<TSC_THRHD_BASE_SHIFT)|(delta<<TSC_THRHD_DELTA_SHIFT);
        }

        chn >>= 1;
    }

    return TSC_ERROR_OK;
}


/**
 * @brief  Get parameters of one channel.
 * @param  TSC_Def Pointer of TSC register.
 * @param  ChnCfg: Pointer of TSC_ChnCfg structure.
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 * @return: None
 */
TSC_ErrorTypeDef TSC_GetChannelCfg( TSC_Module* TSC_Def, TSC_ChnCfg* ChnCfg, uint32_t Channels)
{
    uint32_t i,chn, *pReg;

    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;

    /*Check channel number*/
    if(!(IS_TSC_CHN(Channels)))
        return TSC_ERROR_PARAMETER;

    chn = Channels & TSC_CHNEN_CHN_SEL_MASK;
    
    for (i = 0; i<MAX_TSC_HW_CHN; i++)
    {
        if (chn & 0x00000001)
        {
            pReg  = (uint32_t *)(&(TSC->THRHD0));
            pReg += i;
            ChnCfg->TSC_Base    = (uint16_t)(((*pReg) & TSC_THRHD_BASE_MASK) >> TSC_THRHD_BASE_SHIFT);
            ChnCfg->TSC_Delta   = (uint8_t)(((*pReg) & TSC_THRHD_DELTA_MASK)>> TSC_THRHD_DELTA_SHIFT);

            pReg  = (uint32_t *)(&(TSC->RESR0));
            pReg += (i/8);
            ChnCfg->TSC_ResisValue  = (uint8_t)(((*pReg) >> ((i & 0x7UL)*4)) & TSC_RESR_CHN_RESIST_MASK);
            break;
        }

        chn >>= 1;
    }

    return TSC_ERROR_OK;
}


/**
 * @brief  Get TSC status value.
 * @param  TSC_Def Pointer of TSC register.
 * @param  type TSC status type.
 */
uint32_t TSC_GetStatus(TSC_Module* TSC_Def, uint32_t type)
{
    uint32_t value = 0;

    if(TSC_Def != TSC)
        return 0;
    
    switch (type)
    {
    case TSC_GET_STS_CNTVALUE:
        value = __TSC_GET_CHN_CNT();
        break;

    case TSC_GET_STS_LESS_DET:
        value = __TSC_GET_HW_DET_TYPE(TSC_FLAG_LESS_DET);
        break;

    case TSC_GET_STS_GREAT_DET:
        value = __TSC_GET_HW_DET_TYPE(TSC_FLAG_GREAT_DET);
        break;

    case TSC_GET_STS_CHN_NUM:
        value = __TSC_GET_CHN_NUMBER();
        break;

    case TSC_GET_STS_DET_ST:
        value = __TSC_GET_HW_MODE();
        break;

    default:
        break;
    }

    return value;
}

/**
 * @brief  Enable/Disable hardware detection.
 * @param  TSC_Def Pointer of TSC register.
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 * @param  Cmd ENABLE:Enable hardware detection,DISALBE:Disable hardware detection.
 * @note You can only output one channel at a time.
 */
TSC_ErrorTypeDef TSC_Cmd(TSC_Module* TSC_Def, uint32_t Channels, FunctionalState Cmd)
{
    uint32_t timeout;
    
    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;
    
    if (Cmd != DISABLE)
    {
        // enable tsc channel
        Channels &= TSC_CHNEN_CHN_SEL_MASK;
        __TSC_CHN_CONFIG(Channels );

        /* Enable the TSC */
        __TSC_HW_ENABLE();
    }
    else
    {
        /* Disable the TSC */
        timeout = 0;
        do
        {
            __TSC_HW_DISABLE();
            
            if(++timeout > TSC_TIMEOUT)
                return TSC_ERROR_HW_MODE;
        }while (__TSC_GET_HW_MODE());
            
        __TSC_CHN_CONFIG(0);
    }

    return TSC_ERROR_OK;
}

/**
 * @brief  Toggle channels to output to TIMER2/TIMER4 by software mode.
 * @param  TSC_Def Pointer of TSC register.
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 * @param  TIMx Select timer.
 * @param Cmd ENABLE:Enable hardware detection,DISALBE:Disable hardware detection.
 * @note It can only output to TIMER2/TIMER4 by software mode.Other channels are not valid.
 */
TSC_ErrorTypeDef TSC_SW_SwtichChn(TSC_Module* TSC_Def, uint32_t Channel, TIM_Module* TIMx, FunctionalState Cmd)
{
    uint32_t i, timeout;

    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;

    if ((TIMx != TIM2) && (TIMx != TIM4))
        return TSC_ERROR_PARAMETER;
    

    /* Disable the TSC HW MODE */
    timeout = 0;
    do
    {
        __TSC_HW_DISABLE();
        
        if(++timeout > TSC_TIMEOUT)
            return TSC_ERROR_HW_MODE;
    }while (__TSC_GET_HW_MODE());
        
    if (Cmd == DISABLE) // Close output by software mode
    {
        __TSC_OUT_CONFIG(TSC_OUT_PIN);
        __TSC_SW_DISABLE();
    }
    else
    {
        for (i = 0; i < MAX_TSC_HW_CHN; i++)
        {
            if (Channel & 0x00000001)
            {
                __TSC_SW_CHN_NUM_CONFIG(i);
                break;
            }

            Channel >>= 1;
        }
        
        // Select to output to specified TIMER.
        if (TIMx == TIM4)
        {
            __TSC_OUT_CONFIG(TSC_OUT_TIM4_ETR);
        }
        else
        {
            __TSC_OUT_CONFIG(TSC_OUT_TIM2_ETR);
        }

         __TSC_SW_ENABLE();
    }

    // delay time for tsc channel stabilize output
    for (i = 0; i < 2000; i++)
    {
    }

    return TSC_ERROR_OK;
}

/**
 * @brief  Configure analog signal parameters.
 * @param  TSC_Def Pointer of TSC register.
 * @param  AnaoCfg Pointer of analog parameter structure.
 */
TSC_ErrorTypeDef TSC_SetAnaoCfg(TSC_Module* TSC_Def, TSC_AnaoCfg* AnaoCfg)
{
    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;
    
    if(AnaoCfg == 0)
        return TSC_ERROR_PARAMETER;

    assert_param(IS_TSC_PAD_OPTION(AnaoCfg->TSC_AnaoptrResisOption));
    assert_param(IS_TSC_PAD_SPEED(AnaoCfg->TSC_AnaoptrSpeedOption));
    
    __TSC_PAD_OPT_CONFIG(AnaoCfg->TSC_AnaoptrResisOption);
    __TSC_PAD_SPEED_CONFIG(AnaoCfg->TSC_AnaoptrSpeedOption);
    
    return TSC_ERROR_OK;
}

/**
 * @brief  Configure channel parameters by channel or operation.Support configure several channels at the same time.
 * @param  TSC_Def Pointer of TSC register.
 * @param  ChnCfg Channel parameters.
 * @param  Channels: channels to be configed, as TSC_CHNEN defined
 *   This parameter:bit[0:23] used,bit[24:31] must be 0
 *                  bitx: TSC channel x
 */
TSC_ErrorTypeDef TSC_SetChannelCfg(TSC_Module* TSC_Def, TSC_ChnCfg* ChnCfg, uint32_t Channels)
{
    TSC_ErrorTypeDef err;
    
    if(TSC_Def != TSC)
        return TSC_ERROR_PARAMETER;

    if(0 == ChnCfg)
        return TSC_ERROR_PARAMETER;
    
    // Set resistance
    err = TSC_ConfigInternalResistor(TSC_Def, Channels, ChnCfg->TSC_ResisValue);
    if(err != TSC_ERROR_OK)
        return err;
    
    // Set the threshold of base and delta.
    err = TSC_ConfigThreshold(TSC_Def, Channels, ChnCfg->TSC_Base, ChnCfg->TSC_Delta);
    return err;
}