300 lines
9.7 KiB
C
300 lines
9.7 KiB
C
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/**************************************************************************//**
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* @file sc.c
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* @version V3.00
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* $Revision: 9 $
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* $Date: 15/08/11 10:26a $
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* @brief M451 series Smartcard(SC) driver source file
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*
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* @note
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* Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "M451Series.h"
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// Below are variables used locally by SC driver and does not want to parse by doxygen unless HIDDEN_SYMBOLS is defined
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/// @cond HIDDEN_SYMBOLS
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static uint32_t u32CardStateIgnore[SC_INTERFACE_NUM] = {0};
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/// @endcond HIDDEN_SYMBOLS
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/** @addtogroup Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup SC_Driver SC Driver
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@{
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*/
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/** @addtogroup SC_EXPORTED_FUNCTIONS SC Exported Functions
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@{
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*/
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/**
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* @brief This function indicates specified smartcard slot status.
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* @param[in] sc The pointer of smartcard module.
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* @retval TRUE Card insert.
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* @retval FALSE Card remove.
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* @details This function is used to check if specified smart card slot is presented.
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*/
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uint32_t SC_IsCardInserted(SC_T *sc)
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{
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// put conditions into two variable to remove IAR compilation warning
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uint32_t cond1 = ((sc->STATUS & SC_STATUS_CDPINSTS_Msk) >> SC_STATUS_CDPINSTS_Pos);
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uint32_t cond2 = ((sc->CTL & SC_CTL_CDLV_Msk) >> SC_CTL_CDLV_Pos);
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if(sc == SC0 && u32CardStateIgnore[0] == 1)
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return TRUE;
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#if 0 /* M451 series has only one SC interface */
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else if(sc == SC1 && u32CardStateIgnore[1] == 1)
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return TRUE;
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else if(sc == SC2 && u32CardStateIgnore[2] == 1)
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return TRUE;
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else if(sc == SC3 && u32CardStateIgnore[3] == 1)
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return TRUE;
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else if(sc == SC4 && u32CardStateIgnore[4] == 1)
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return TRUE;
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else if(sc == SC5 && u32CardStateIgnore[5] == 1)
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return TRUE;
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#endif
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else if(cond1 != cond2)
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return FALSE;
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else
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return TRUE;
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}
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/**
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* @brief Reset the Tx/Rx FIFO.
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* @param[in] sc The pointer of smartcard module.
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* @return None
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* @details This function reset both transmit and receive FIFO of specified smartcard module.
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*/
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void SC_ClearFIFO(SC_T *sc)
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{
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sc->ALTCTL |= (SC_ALTCTL_TXRST_Msk | SC_ALTCTL_RXRST_Msk);
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}
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/**
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* @brief This function disable specified smartcard module.
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* @param[in] sc The pointer of smartcard module.
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* @return None
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* @details SC will force all transition to IDLE state.
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*/
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void SC_Close(SC_T *sc)
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{
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sc->INTEN = 0;
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sc->PINCTL = 0;
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sc->ALTCTL = 0;
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sc->CTL = 0;
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}
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/**
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* @brief This function initialized smartcard module.
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* @param[in] sc The pointer of smartcard module.
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* @param[in] u32CD Card detect polarity, select the CD pin state which indicates card insert. Could be:
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* -\ref SC_PIN_STATE_HIGH.
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* -\ref SC_PIN_STATE_LOW.
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* -\ref SC_PIN_STATE_IGNORE, no card detect pin, always assumes card present.
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* @param[in] u32PWR Power on polarity, select the PWR pin state which could set smartcard VCC to high level. Could be:
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* -\ref SC_PIN_STATE_HIGH.
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* -\ref SC_PIN_STATE_LOW.
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* @return None
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* @details Initialization process configures smartcard and enables engine clock.
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*/
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void SC_Open(SC_T *sc, uint32_t u32CD, uint32_t u32PWR)
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{
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uint32_t u32Reg = 0, u32Intf;
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if(sc == SC0)
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u32Intf = 0;
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#if 0 /* M451 series has only one SC interface */
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else if(sc == SC1)
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u32Intf = 1;
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else if(sc == SC2)
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u32Intf = 2;
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else if(sc == SC3)
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u32Intf = 3;
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else if(sc == SC4)
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u32Intf = 4;
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else if(sc == SC5)
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u32Intf = 5;
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#endif
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else
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return ;
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if(u32CD != SC_PIN_STATE_IGNORE) {
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u32Reg = u32CD ? 0: SC_CTL_CDLV_Msk;
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u32CardStateIgnore[u32Intf] = 0;
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} else {
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u32CardStateIgnore[u32Intf] = 1;
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}
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while(sc->PINCTL & SC_PINCTL_SYNC_Msk);
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sc->PINCTL = u32PWR ? 0 : SC_PINCTL_PWRINV_Msk;
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while(sc->CTL & SC_CTL_SYNC_Msk);
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sc->CTL = SC_CTL_SCEN_Msk | u32Reg;
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}
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/**
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* @brief This function reset specified smartcard module to its default state for activate smartcard.
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* @param[in] sc The pointer of smartcard module.
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* @return None
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* @details Reset the Tx/Rx FIFO & clock & initial default parameter.
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*/
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void SC_ResetReader(SC_T *sc)
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{
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uint32_t u32Intf;
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if(sc == SC0)
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u32Intf = 0;
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#if 0 /* M451 series has only one SC interface */
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else if(sc == SC1)
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u32Intf = 1;
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else if(sc == SC2)
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u32Intf = 2;
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else if(sc == SC3)
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u32Intf = 3;
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else if(sc == SC4)
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u32Intf = 4;
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else if(sc == SC5)
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u32Intf = 5;
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#endif
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else
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return ;
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// Reset FIFO, enable auto de-activation while card removal
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sc->ALTCTL |= (SC_ALTCTL_TXRST_Msk | SC_ALTCTL_RXRST_Msk | SC_ALTCTL_ADACEN_Msk);
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// Set Rx trigger level to 1 character, longest card detect debounce period, disable error retry (EMV ATR does not use error retry)
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while(sc->CTL & SC_CTL_SYNC_Msk);
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sc->CTL &= ~(SC_CTL_RXTRGLV_Msk | SC_CTL_CDDBSEL_Msk | SC_CTL_TXRTY_Msk | SC_CTL_RXRTY_Msk);
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// Enable auto convention, and all three smartcard internal timers
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sc->CTL |= SC_CTL_AUTOCEN_Msk | SC_CTL_TMRSEL_Msk;
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// Disable Rx timeout
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sc->RXTOUT = 0;
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// 372 clocks per ETU by default
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sc->ETUCTL = 371;
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/* Enable necessary interrupt for smartcard operation */
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if(u32CardStateIgnore[u32Intf]) // Do not enable card detect interrupt if card present state ignore
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sc->INTEN = (SC_INTEN_RDAIEN_Msk |
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SC_INTEN_TERRIEN_Msk |
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SC_INTEN_TMR0IEN_Msk |
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SC_INTEN_TMR1IEN_Msk |
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SC_INTEN_TMR2IEN_Msk |
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SC_INTEN_BGTIEN_Msk |
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SC_INTEN_ACERRIEN_Msk);
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else
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sc->INTEN = (SC_INTEN_RDAIEN_Msk |
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SC_INTEN_TERRIEN_Msk |
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SC_INTEN_TMR0IEN_Msk |
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SC_INTEN_TMR1IEN_Msk |
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SC_INTEN_TMR2IEN_Msk |
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SC_INTEN_BGTIEN_Msk |
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SC_INTEN_ACERRIEN_Msk |
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SC_INTEN_CDIEN_Msk);
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return;
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}
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/**
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* @brief Set Block Guard Time.
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* @param[in] sc The pointer of smartcard module.
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* @param[in] u32BGT Block guard time using ETU as unit, valid range are between 1 ~ 32.
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* @return None
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* @details This function block guard time (BGT) of specified smartcard module.
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*/
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void SC_SetBlockGuardTime(SC_T *sc, uint32_t u32BGT)
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{
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sc->CTL = (sc->CTL & ~SC_CTL_BGT_Msk) | ((u32BGT - 1) << SC_CTL_BGT_Pos);
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}
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/**
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* @brief Set character guard time.
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* @param[in] sc The pointer of smartcard module.
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* @param[in] u32CGT Character guard time using ETU as unit, valid range are between 11 ~ 267.
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* @return None
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* @details This function character guard time (CGT) of specified smartcard module.
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* @note Before using this API, user should set the correct stop bit length first.
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*/
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void SC_SetCharGuardTime(SC_T *sc, uint32_t u32CGT)
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{
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u32CGT -= sc->CTL & SC_CTL_NSB_Msk ? 11 : 12;
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sc->EGT = u32CGT;
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}
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/**
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* @brief Stop all Timer counting.
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* @param[in] sc The pointer of smartcard module.
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* @return None
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* @details This function stop all smartcard timer of specified smartcard module.
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* @note This function stop the timers within smartcard module, \b not timer module.
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*/
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void SC_StopAllTimer(SC_T *sc)
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{
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sc->ALTCTL &= ~(SC_ALTCTL_CNTEN0_Msk | SC_ALTCTL_CNTEN1_Msk | SC_ALTCTL_CNTEN2_Msk);
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}
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/**
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* @brief This function configure and start a smartcard timer of specified smartcard module.
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* @param[in] sc The pointer of smartcard module.
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* @param[in] u32TimerNum Timer(s) to start. Valid values are 0, 1, 2.
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* @param[in] u32Mode Timer operating mode, valid values are:
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* - \ref SC_TMR_MODE_0
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* - \ref SC_TMR_MODE_1
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* - \ref SC_TMR_MODE_2
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* - \ref SC_TMR_MODE_3
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* - \ref SC_TMR_MODE_4
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* - \ref SC_TMR_MODE_5
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* - \ref SC_TMR_MODE_6
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* - \ref SC_TMR_MODE_7
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* - \ref SC_TMR_MODE_8
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* - \ref SC_TMR_MODE_F
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* @param[in] u32ETUCount Timer timeout duration, ETU based. For timer 0, valid range are between 1~0x1000000ETUs.
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* For timer 1 and timer 2, valid range are between 1 ~ 0x100 ETUs.
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* @return None
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* @details Enable Timer starting, counter will count when condition match.
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* @note This function start the timer within smartcard module, \b not timer module.
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* @note Depend on the timer operating mode, timer may not start counting immediately.
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*/
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void SC_StartTimer(SC_T *sc, uint32_t u32TimerNum, uint32_t u32Mode, uint32_t u32ETUCount)
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{
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uint32_t reg = u32Mode | (SC_TMRCTL0_CNT_Msk & (u32ETUCount - 1));
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if(u32TimerNum == 0) {
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sc->TMRCTL0 = reg;
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sc->ALTCTL |= SC_ALTCTL_CNTEN0_Msk;
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} else if(u32TimerNum == 1) {
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sc->TMRCTL1 = reg;
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sc->ALTCTL |= SC_ALTCTL_CNTEN1_Msk;
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} else { // timer 2
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sc->TMRCTL2 = reg;
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sc->ALTCTL |= SC_ALTCTL_CNTEN2_Msk;
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}
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}
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/**
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* @brief Stop Timer counting.
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* @param[in] sc The pointer of smartcard module.
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* @param[in] u32TimerNum Timer(s) to stop. Valid values are 0, 1, 2.
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* @return None
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* @details This function stop a smartcard timer of specified smartcard module.
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* @note This function stop the timer within smartcard module, \b not timer module.
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*/
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void SC_StopTimer(SC_T *sc, uint32_t u32TimerNum)
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{
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if(u32TimerNum == 0)
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sc->ALTCTL &= ~SC_ALTCTL_CNTEN0_Msk;
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else if(u32TimerNum == 1)
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sc->ALTCTL &= ~SC_ALTCTL_CNTEN1_Msk;
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else // timer 2
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sc->ALTCTL &= ~SC_ALTCTL_CNTEN2_Msk;
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}
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/*@}*/ /* end of group SC_EXPORTED_FUNCTIONS */
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/*@}*/ /* end of group SC_Driver */
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/*@}*/ /* end of group Standard_Driver */
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/*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/
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