- /******************************************************************************
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V1.00
- * $Revision: 2 $
- * $Date: 15/09/24 5:50p $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Demonstrate ADC function by repeatedly convert the input of ADC
- * channel 5 (P1.5) and shows the result on UART console.
- *
- * @note
- * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.
- *****************************************************************************/
- #include <stdio.h>
- #include "Mini51Series.h"
- void ADC_IRQHandler(void)
- {
- uint32_t u32Flag;
- // Get ADC comparator interrupt flag
- u32Flag = ADC_GET_INT_FLAG(ADC, ADC_ADF_INT);
- // Get ADC convert result
- printf("Convert result is %x\n", (uint32_t)ADC_GET_CONVERSION_DATA(ADC, 0));
- ADC_CLR_INT_FLAG(ADC, u32Flag);
- }
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Unlock protected registers */
- SYS_UnlockReg();
- /* Set P5 multi-function pins for XTAL1 and XTAL2 */
- SYS->P5_MFP = SYS_MFP_P50_XTAL1 | SYS_MFP_P51_XTAL2;
- /* Enable external 12MHz XTAL, HIRC */
- CLK->PWRCON = CLK_PWRCON_OSC22M_EN_Msk | CLK_PWRCON_HXT;
- /* Waiting for clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk | CLK_CLKSTATUS_XTL_STB_Msk);
- /* Switch HCLK clock source to XTL */
- CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_XTAL,CLK_CLKDIV_HCLK(1));
- /* Enable IP clock */
- CLK_EnableModuleClock(UART_MODULE);
- CLK_EnableModuleClock(ADC_MODULE);
- /* Select IP clock source */
- CLK_SetModuleClock(UART_MODULE,CLK_CLKSEL1_UART_S_XTAL,CLK_CLKDIV_UART(1));
- CLK_SetModuleClock(ADC_MODULE,CLK_CLKSEL1_ADC_S_XTAL,CLK_CLKDIV_ADC(6));
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set P0 multi-function pins for UART RXD, TXD */
- SYS->P0_MFP = SYS_MFP_P00_TXD | SYS_MFP_P01_RXD;
- /* Set P1 multi-function pin ADC channel 5 input*/
- SYS->P1_MFP = SYS_MFP_P15_AIN5;
- /* Analog pin OFFD to prevent leakage */
- P1->OFFD |= (1 << 5) << GPIO_OFFD_OFFD_Pos;
- /* To update the variable SystemCoreClock */
- SystemCoreClockUpdate();
- /* Lock protected registers */
- SYS_LockReg();
- }
- int32_t main (void)
- {
- /* Init System, IP clock and multi-function I/O
- In the end of SYS_Init() will issue SYS_LockReg()
- to lock protected register. If user want to write
- protected register, please issue SYS_UnlockReg()
- to unlock protected register if necessary */
- SYS_Init();
- /* Init UART to 115200-8n1 for print message */
- UART_Open(UART0, 115200);
- printf("\nThis sample code demonstrate ADC channel 5 conversion and printf the result on UART\n");
- // Enable channel 5
- ADC_Open(ADC, 0, 0, 0x01 << 5);
- // Power on ADC
- ADC_POWER_ON(ADC);
- // Enable ADC convert complete interrupt
- ADC_EnableInt(ADC, ADC_ADF_INT);
- NVIC_EnableIRQ(ADC_IRQn);
- while(1) {
- // Trigger ADC conversion if it is idle
- if(!ADC_IS_BUSY(ADC)) {
- ADC_START_CONV(ADC);
- }
- }
- }
- /*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/
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