text: /**************************************************************************//**
   * @file     main.c
   * @version  V3.00
   * @brief    Use ADINT interrupt to do the EADC continuous scan conversion.
   *
   * @copyright SPDX-License-Identifier: Apache-2.0
   * @copyright Copyright (C) 2021 Nuvoton Technology Corp. All rights reserved.
   ******************************************************************************/
  #include <stdio.h>
  #include "NuMicro.h"
  
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* Define global variables and constants                                                                   */
  /*---------------------------------------------------------------------------------------------------------*/
  static volatile uint32_t g_u32AdcIntFlag, g_u32COVNUMFlag = 0;
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* Define functions prototype                                                                              */
  /*---------------------------------------------------------------------------------------------------------*/
  int32_t main(void);
  void EADC_FunctionTest(void);
  void EADC00_IRQHandler(void);
  void SYS_Init(void);
  void UART0_Init(void);
  /*---------------------------------------------------------------------------------------------------------*/
  /* EADC interrupt handler                                                                                  */
  /*---------------------------------------------------------------------------------------------------------*/
  void EADC00_IRQHandler(void)
  {
      g_u32AdcIntFlag = 1;
      EADC_CLR_INT_FLAG(EADC0, EADC_STATUS2_ADIF0_Msk);      /* Clear the A/D ADINT0 interrupt flag */
  }
  
  void SYS_Init(void)
  {
  
      /* Set PF multi-function pins for XT1_OUT(PF.2) and XT1_IN(PF.3) */
      SET_XT1_OUT_PF2();
      SET_XT1_IN_PF3();
  
      /*---------------------------------------------------------------------------------------------------------*/
      /* Init System Clock                                                                                       */
      /*---------------------------------------------------------------------------------------------------------*/
  
      /* Enable HIRC and HXT clock */
      CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk | CLK_PWRCTL_HXTEN_Msk);
  
      /* Wait for HIRC and HXT clock ready */
      CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk | CLK_STATUS_HXTSTB_Msk);
  
      /* Set PCLK0 and PCLK1 to HCLK/2 */
      CLK->PCLKDIV = (CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2);
  
      /* Set core clock to 200MHz */
      CLK_SetCoreClock(200000000);
  
      /* Enable all GPIO clock */
      CLK->AHBCLK0 |= CLK_AHBCLK0_GPACKEN_Msk | CLK_AHBCLK0_GPBCKEN_Msk | CLK_AHBCLK0_GPCCKEN_Msk | CLK_AHBCLK0_GPDCKEN_Msk |
                      CLK_AHBCLK0_GPECKEN_Msk | CLK_AHBCLK0_GPFCKEN_Msk | CLK_AHBCLK0_GPGCKEN_Msk | CLK_AHBCLK0_GPHCKEN_Msk;
      CLK->AHBCLK1 |= CLK_AHBCLK1_GPICKEN_Msk | CLK_AHBCLK1_GPJCKEN_Msk;
  
      /* Enable UART0 module clock */
      CLK_EnableModuleClock(UART0_MODULE);
  
      /* Select UART0 module clock source as HIRC and UART0 module clock divider as 1 */
      CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));
  
      /* Enable EADC0 module clock */
      CLK_EnableModuleClock(EADC0_MODULE);
  
      /* Set EADC0 clock divider as 12 */
      CLK_SetModuleClock(EADC0_MODULE, CLK_CLKSEL0_EADC0SEL_PLL_DIV2, CLK_CLKDIV0_EADC0(12));
  
      /*---------------------------------------------------------------------------------------------------------*/
      /* Init I/O Multi-function                                                                                 */
      /*---------------------------------------------------------------------------------------------------------*/
  
      /* Set multi-function pins for UART0 RXD and TXD */
      SET_UART0_RXD_PB12();
      SET_UART0_TXD_PB13();
  
      /* Set multi-function pins for EADC0 channels. */
      SET_EADC0_CH0_PB0();
      SET_EADC0_CH1_PB1();
      SET_EADC0_CH2_PB2();
      SET_EADC0_CH3_PB3();
  
      /* Disable digital input path of EADC analog pin to prevent leakage */
      GPIO_DISABLE_DIGITAL_PATH(PB, BIT3 | BIT2 | BIT1 | BIT0);
  
  }
  
  void UART0_Init(void)
  {
      /*---------------------------------------------------------------------------------------------------------*/
      /* Init UART                                                                                               */
      /*---------------------------------------------------------------------------------------------------------*/
  
      /* Configure UART0 and set UART0 baud rate */
      UART_Open(UART0, 115200);
  }
  
  /*---------------------------------------------------------------------------------------------------------*/
  /* EADC function test                                                                                      */
  /*---------------------------------------------------------------------------------------------------------*/
  void EADC_FunctionTest(void)
  {
      uint8_t  u8Option, u8SampleCnt = 0;
      int32_t  ai32ConversionData[8] = {0};
      uint32_t u32TimeOutCnt = 0;
      int32_t  i32Err;
  
      printf("\n");
      printf("+----------------------------------------------------------------------+\n");
      printf("|                      ADINT trigger mode test                         |\n");
      printf("+----------------------------------------------------------------------+\n");
  
      printf("\nIn this test, software will get conversion result from fast channels.\n");
  
      while(1)
      {
          printf("\n\nSelect input mode:\n");
          printf("  [1] Single end input (channel 10, 11, 14 and 15)\n");
          printf("  [2] Differential input (input channel pair 5 and 7)\n");
          printf("  Other keys: exit continuous scan mode test\n");
          u8Option = (uint8_t)getchar();
          if(u8Option == '1')
          {
              /* Set input mode as single-end and enable the A/D converter */
              i32Err = EADC_Open(EADC0, EADC_CTL_DIFFEN_SINGLE_END);
  
              /* Check EADC global error code. */
              if (i32Err != 0)
              {
                  if (i32Err == EADC_CAL_ERR)
                  {
                      printf("EADC has calibration error.\n");
                      return;
                  }
                  else if (i32Err == EADC_CLKDIV_ERR)
                  {
                      printf("EADC clock frequency is configured error.\n");
                      return;
                  }
                  else
                  {
                      printf("EADC has operation error.\n");
                      return;
                  }
              }
  
              /* Configure the sample 4 module for analog input channel 10 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 4, EADC_ADINT0_TRIGGER, 10);
              /* Configure the sample 5 module for analog input channel 11 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 5, EADC_ADINT0_TRIGGER, 11);
              /* Configure the sample 6 module for analog input channel 14 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 6, EADC_ADINT0_TRIGGER, 14);
              /* Configure the sample 7 module for analog input channel 15 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 7, EADC_ADINT0_TRIGGER, 15);
  
              /* Clear the A/D ADINT0 interrupt flag for safe */
              EADC_CLR_INT_FLAG(EADC0, EADC_STATUS2_ADIF0_Msk);
  
              /* Enable the sample module 7 interrupt */
              EADC_ENABLE_INT(EADC0, BIT0);//Enable sample module  A/D ADINT0 interrupt.
              EADC_ENABLE_SAMPLE_MODULE_INT(EADC0, 0, BIT7);//Enable sample module 7 interrupt.
              NVIC_EnableIRQ(EADC00_IRQn);
  
              /* Reset the ADC indicator and trigger sample module 7 to start A/D conversion */
              g_u32AdcIntFlag = 0;
              g_u32COVNUMFlag = 0;
              EADC_START_CONV(EADC0, BIT7);
  
              __WFI();
  
              /* Disable the sample module 7 interrupt */
              EADC_DISABLE_SAMPLE_MODULE_INT(EADC0, 0, BIT7);
  
              /* Wait conversion done */
              u32TimeOutCnt = SystemCoreClock; /* 1 second time-out */
              while(EADC_GET_DATA_VALID_FLAG(EADC0, (BIT7 | BIT6 | BIT5 | BIT4)) != (BIT7 | BIT6 | BIT5 | BIT4))
              {
                  if(--u32TimeOutCnt == 0)
                  {
                      printf("Wait for EADC conversion done time-out!\n");
                      return;
                  }
              }
  
              /* Get the conversion result of the sample module */
              for(u8SampleCnt = 0; u8SampleCnt < 4; u8SampleCnt++)
                  ai32ConversionData[u8SampleCnt] = EADC_GET_CONV_DATA(EADC0, u8SampleCnt + 4);
  
              printf("Conversion result of channel %d: 0x%X (%d)\n", 10, ai32ConversionData[0], ai32ConversionData[0]);
              printf("Conversion result of channel %d: 0x%X (%d)\n", 11, ai32ConversionData[1], ai32ConversionData[1]);
              printf("Conversion result of channel %d: 0x%X (%d)\n", 14, ai32ConversionData[2], ai32ConversionData[2]);
              printf("Conversion result of channel %d: 0x%X (%d)\n", 15, ai32ConversionData[3], ai32ConversionData[3]);
  
          }
          else if(u8Option == '2')
          {
              /* In differential analog input mode, only the even number of the two corresponding channels needs to be enabled in CHSEL (EADC_SCTLn[3:0]).
                 The conversion result will be placed to the corresponding data register of the enabled channel. */
  
              /* Set input mode as differential and enable the A/D converter */
              i32Err = EADC_Open(EADC0, EADC_CTL_DIFFEN_DIFFERENTIAL);
  
              /* Check EADC global error code. */
              if (i32Err != 0)
              {
                  if (i32Err == EADC_CAL_ERR)
                  {
                      printf("EADC has calibration error.\n");
                      return;
                  }
                  else if (i32Err == EADC_CLKDIV_ERR)
                  {
                      printf("EADC clock frequency is configured error.\n");
                      return;
                  }
                  else
                  {
                      printf("EADC has operation error.\n");
                      return;
                  }
              }
  
              /* Configure the sample module 4 for analog input channel 10 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 4, EADC_ADINT0_TRIGGER, 10);
              /* Configure the sample module 6 for analog input channel 14 and enable ADINT0 trigger source */
              EADC_ConfigSampleModule(EADC0, 6, EADC_ADINT0_TRIGGER, 14);
  
              /* Clear the A/D ADINT0 interrupt flag for safe */
              EADC_CLR_INT_FLAG(EADC0, EADC_STATUS2_ADIF0_Msk);
  
              /* Enable the sample module 6 interrupt */
              EADC_ENABLE_INT(EADC0, BIT0);//Enable sample module A/D ADINT0 interrupt.
              EADC_ENABLE_SAMPLE_MODULE_INT(EADC0, 0, BIT6);//Enable sample module 6 interrupt.
              NVIC_EnableIRQ(EADC00_IRQn);
  
              /* Reset the ADC indicator and trigger sample module 6 to start A/D conversion */
              g_u32AdcIntFlag = 0;
              g_u32COVNUMFlag = 0;
              EADC_START_CONV(EADC0, BIT6);
  
              __WFI();
  
              /* Disable the sample module 6 interrupt */
              EADC_DISABLE_SAMPLE_MODULE_INT(EADC0, 0, BIT6);
  
              /* Wait conversion done */
              u32TimeOutCnt = SystemCoreClock; /* 1 second time-out */
              while(EADC_GET_DATA_VALID_FLAG(EADC0, (BIT6 | BIT4)) != (BIT6 | BIT4))
              {
                  if(--u32TimeOutCnt == 0)
                  {
                      printf("Wait for EADC conversion done time-out!\n");
                      return;
                  }
              }
  
              /* Get the conversion result of the sample module */
              for(u8SampleCnt = 0; u8SampleCnt < 4; u8SampleCnt++)
                  ai32ConversionData[u8SampleCnt] = EADC_GET_CONV_DATA(EADC0, u8SampleCnt + 4);
  
              printf("Conversion result of channel pair %d: 0x%X (%d)\n", 5, ai32ConversionData[0], ai32ConversionData[0]);
              printf("Conversion result of channel pair %d: 0x%X (%d)\n", 7, ai32ConversionData[2], ai32ConversionData[2]);
  
          }
          else
              return ;
  
          /* Reset the sample module 4, 5, 6, 7 for analog input channel and disable ADINT0 trigger source */
          EADC_ConfigSampleModule(EADC0, 4, EADC_SOFTWARE_TRIGGER, 0);
          EADC_ConfigSampleModule(EADC0, 5, EADC_SOFTWARE_TRIGGER, 0);
          EADC_ConfigSampleModule(EADC0, 6, EADC_SOFTWARE_TRIGGER, 0);
          EADC_ConfigSampleModule(EADC0, 7, EADC_SOFTWARE_TRIGGER, 0);
  
          /* Clear the conversion result of the sample module */
          for(u8SampleCnt = 0; u8SampleCnt < 4; u8SampleCnt++)
              ai32ConversionData[u8SampleCnt] = 0;
      }
  }
  
  
  /*---------------------------------------------------------------------------------------------------------*/
  /*  Main Function                                                                                          */
  /*---------------------------------------------------------------------------------------------------------*/
  int32_t main(void)
  {
  
      /* Unlock protected registers */
      SYS_UnlockReg();
  
      /* Init System, IP clock and multi-function I/O */
      SYS_Init();
  
      /* Lock protected registers */
      SYS_LockReg();
  
      /* Init UART0 for printf */
      UART0_Init();
  
      /*---------------------------------------------------------------------------------------------------------*/
      /* SAMPLE CODE                                                                                             */
      /*---------------------------------------------------------------------------------------------------------*/
  
      printf("\nSystem clock rate: %d Hz", SystemCoreClock);
  
      /* EADC function test */
      EADC_FunctionTest();
  
      /* Reset EADC module */
      SYS_ResetModule(EADC0_RST);
  
      /* Disable EADC IP clock */
      CLK_DisableModuleClock(EADC0_MODULE);
  
      /* Disable External Interrupt */
      NVIC_DisableIRQ(EADC00_IRQn);
  
      printf("Exit EADC sample code\n");
  
      while(1);
  
  }
  
  
  /*** (C) COPYRIGHT 2021 Nuvoton Technology Corp. ***/
  