text: /****************************************************************************
   * @file     main.c
   * @version  V2.0
   * $Revision: 3 $
   * $Date: 17/05/12 10:13a $
   * @brief    USB CCID smart card reader sample code.
   * @note
   * Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
   ******************************************************************************/
  #include <stdio.h>
  #include "NUC1261.h"
  #include "ccid.h"
  #include "ccid_if.h"
  #include "sclib.h"
  
  
  #define PLL_CLOCK       72000000
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* Global variables                                                                                        */
  /*---------------------------------------------------------------------------------------------------------*/
  #define INT_BUFFER_SIZE     64    /* Interrupt message buffer size */
  #define BULK_BUFFER_SIZE    512   /* bulk message buffer size */
  
  uint8_t UsbIntMessageBuffer[INT_BUFFER_SIZE];
  uint8_t UsbMessageBuffer[BULK_BUFFER_SIZE];
  
  uint8_t volatile gu8IsDeviceReady;
  uint8_t volatile gu8AbortRequestFlag;
  uint8_t volatile gu8IsBulkOutReady;
  uint8_t volatile gu8IsBulkInReady;
  
  uint8_t *pu8IntInBuf;
  uint8_t *pUsbMessageBuffer;
  uint32_t volatile u32BulkSize;
  
  int32_t volatile gi32UsbdMessageLength;
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* The interrupt services routine of smartcard port 0                                                      */
  /*---------------------------------------------------------------------------------------------------------*/
  void SC01_IRQHandler(void)
  {
      /* Please don't remove any of the function calls below */
      if(SCLIB_CheckCDEvent(0))
      {
          RDR_to_PC_NotifySlotChange();
          USBD_MemCopy((uint8_t *)(USBD_BUF_BASE + USBD_GET_EP_BUF_ADDR(EP4)), pu8IntInBuf, 2);
          USBD_SET_PAYLOAD_LEN(EP4, 2);
          return; // Card insert/remove event occurred, no need to check other event...
      }
  
      SCLIB_CheckTimeOutEvent(0);
      SCLIB_CheckTxRxEvent(0);
      SCLIB_CheckErrorEvent(0);
  
      return;
  }
  
  void SYS_Init(void)
  {
      /*---------------------------------------------------------------------------------------------------------*/
      /* Init System Clock                                                                                       */
      /*---------------------------------------------------------------------------------------------------------*/
      /* Enable HIRC clock (Internal RC 22.1184MHz) */
      CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
  
      /* Wait for HIRC clock ready */
      CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
  
      /* Select HCLK clock source as HIRC and and HCLK source divider as 1 */
      CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
  
      /* Set PLL to Power-down mode and PLLSTB bit in CLK_STATUS register will be cleared by hardware.*/
      CLK_DisablePLL();
  
      /* Enable HXT clock (external XTAL 12MHz) */
      CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
  
      /* Wait for HXT clock ready */
      CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
  
      /* Set core clock as PLL_CLOCK from PLL */
      CLK_SetCoreClock(PLL_CLOCK);
  
      /* Select module clock source */
      CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1));
      CLK_SetModuleClock(SC0_MODULE, CLK_CLKSEL3_SC0SEL_HXT, CLK_CLKDIV1_SC0(3));
      CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_PLL, CLK_CLKDIV0_USB(3));
  
      /* Enable module clock */
      CLK_EnableModuleClock(UART0_MODULE);
      CLK_EnableModuleClock(SC0_MODULE);
      CLK_EnableModuleClock(USBD_MODULE);
  
      /*---------------------------------------------------------------------------------------------------------*/
      /* Init I/O Multi-function                                                                                 */
      /*---------------------------------------------------------------------------------------------------------*/
      /* Set PA multi-function pins for UART0 RXD and TXD */
      SYS->GPA_MFPL &= ~(SYS_GPA_MFPL_PA3MFP_Msk | SYS_GPA_MFPL_PA2MFP_Msk);
      SYS->GPA_MFPL |= (SYS_GPA_MFPL_PA3MFP_UART0_RXD | SYS_GPA_MFPL_PA2MFP_UART0_TXD);
  
      /* Set PC.0 ~ PC.3 and PB.2 for SC0 interface */
      SYS->GPC_MFPL &= ~(SYS_GPC_MFPL_PC0MFP_Msk |
                         SYS_GPC_MFPL_PC1MFP_Msk |
                         SYS_GPC_MFPL_PC2MFP_Msk |
                         SYS_GPC_MFPL_PC3MFP_Msk);
      SYS->GPB_MFPL &= ~SYS_GPB_MFPL_PB2MFP_Msk;
      SYS->GPC_MFPL |= (SC0_DAT_PC0 |
                        SC0_CLK_PC1 |
                        SC0_RST_PC2 |
                        SC0_PWR_PC3);
      SYS->GPB_MFPL |= SC0_nCD_PB2;
  }
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* Init UART                                                                                               */
  /*---------------------------------------------------------------------------------------------------------*/
  void UART0_Init()
  {
      /* Reset IP */
      SYS_ResetModule(UART0_RST);
  
      /* Configure UART0 and set UART0 Baudrate */
      UART_Open(UART0, 115200);
  }
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* MAIN function                                                                                           */
  /*---------------------------------------------------------------------------------------------------------*/
  int main(void)
  {
      /* Unlock protected registers */
      SYS_UnlockReg();
  
      /* Init System, peripheral clock and multi-function I/O */
      SYS_Init();
  
      /* Lock protected registers */
      SYS_LockReg();
  
      /* Init UART0 for printf */
      UART0_Init();
  
      printf("\n\nCPU @ %dHz\n", SystemCoreClock);
      printf("+-----------------------------------------------------+\n");
      printf("|    NuMicro USB CCID SmartCard Reader Sample Code    |\n");
      printf("+-----------------------------------------------------+\n");
  
      /* Open smartcard interface 0. CD pin state low indicates card insert and PWR pin low raise VCC pin to card */
      SC_Open(SC0, SC_PIN_STATE_LOW, SC_PIN_STATE_HIGH);
      NVIC_EnableIRQ(SC01_IRQn);
  
      SC0->INTEN = SC_INTEN_CDIEN_Msk;
  
      USBD_Open(&gsInfo, CCID_ClassRequest, NULL);
  
      /* Endpoint configuration */
      CCID_Init();
  
      /* Set priority is a must under current architecture. Otherwise smartcard interrupt will be blocked by USBD interrupt */
      NVIC_SetPriority(USBD_IRQn, (1 << __NVIC_PRIO_BITS) - 2);
  
      NVIC_EnableIRQ(USBD_IRQn);
      USBD_Start();
  
      while(1);
  }
  
  /*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/
  