EC_Nano100_Use_BandGap_Measure_VDD_And_Temperature_V1.00.zip
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- /**************************************************************************//**
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V1.00
- * $Revision: 6 $
- * $Date: 14/05/08 4:24p $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Demonstrate measure internal temperature and supply voltage of IC using internal BandGap 2.5V voltage.
- *
- * @note
- * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
- *****************************************************************************/
- #include <stdio.h>
- #include "Nano100Series.h"
- volatile float fTmp = 0;
- volatile float fAvdd = 0;
- void ADC_IRQHandler(void);
- void ADC_IRQHandler(void)
- {
- uint32_t u32Flag;
- // Get ADC conversion finish interrupt flag
- u32Flag = ADC_GET_INT_FLAG(ADC, ADC_ADF_INT);
- if (u32Flag & ADC_ADF_INT)
- {
- uint32_t u32Result;
- u32Result = ADC_GET_CONVERSION_DATA(ADC, 15);
- fAvdd = 2.5 * 0xfff / u32Result;
- printf(" Channel 15 conversion result is %d, VDD is %f volt \n", u32Result, fAvdd);
- u32Result = ADC_GET_CONVERSION_DATA(ADC, 14);
- fTmp = (740 - (1000 * u32Result / 4096) * fAvdd) / 1.73 ;
- printf(" Channel 14 conversion result is %d, Temperature is %f degree \n", u32Result, fTmp);
- }
- ADC_CLR_INT_FLAG(ADC, u32Flag);
- }
- void SYS_EnableTempCtl()
- {
- SYS->TEMPCTL |= (SYS_TEMPCTL_VTEMP_EN_Msk);
- }
- void SYS_DisableTempCtl()
- {
- SYS->TEMPCTL = ((SYS->TEMPCTL & ~0x1));
- }
- void SYS_EnableIntVRefBGP(uint8_t iValue)
- {
- if (iValue)
- SYS->Int_VREFCTL = ((SYS->Int_VREFCTL & ~0x7) | (SYS_VREFCTL_BGP_EN_Msk | SYS_VREFCTL_REG_EN_Msk | 0x4)); // BGP 2.5V
- else
- SYS->Int_VREFCTL = ((SYS->Int_VREFCTL & ~0x7) | (SYS_VREFCTL_BGP_EN_Msk | SYS_VREFCTL_REG_EN_Msk)); // BGP 1.8V
- }
- void SYS_DisableIntRefBGP()
- {
- SYS->Int_VREFCTL &= ~0x7 ;
- }
- void ADC_SetVrefVoltage(uint8_t iValue)
- {
- ADC->CR &= ~ADC_CR_REFSEL_Msk;
- if (iValue == 1) // Select Int_Vref as Voltage
- {
- ADC->CR |= (0x1 << ADC_CR_REFSEL_Pos);
- }
- else if (iValue == 2) // Select Vref as Voltage
- {
- ADC->CR |= (0x2 << ADC_CR_REFSEL_Pos);
- }
- else // default Select Power as Voltage
- {
- }
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- void SYS_Init(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
- /* Set HCLK source form HXT and HCLK source divide 1 */
- CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HXT, CLK_HCLK_CLK_DIVIDER(1));
- /* Enable external 12MHz HXT, 32KHz LXT and HIRC */
- CLK_EnableXtalRC(CLK_PWRCTL_HXT_EN_Msk | CLK_PWRCTL_LXT_EN_Msk | CLK_PWRCTL_HIRC_EN_Msk);
- /* Waiting for clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_HXT_STB_Msk | CLK_CLKSTATUS_LXT_STB_Msk | CLK_CLKSTATUS_HIRC_STB_Msk);
- /* Set HCLK frequency 42MHz */
- CLK_SetCoreClock(32000000);
- /* Enable IP clock */
- CLK_EnableModuleClock(UART0_MODULE);
- /* Enable ADC clock */
- CLK_EnableModuleClock(ADC_MODULE);
- /* Select IP clock source */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_UART_CLK_DIVIDER(1));
- CLK_SetModuleClock(ADC_MODULE, CLK_CLKSEL1_ADC_S_HXT, CLK_ADC_CLK_DIVIDER(200));
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set PB multi-function pins for UART0 RXD and TXD */
- SYS->PB_L_MFP &= ~(SYS_PB_L_MFP_PB0_MFP_Msk | SYS_PB_L_MFP_PB1_MFP_Msk);
- SYS->PB_L_MFP |= (SYS_PB_L_MFP_PB0_MFP_UART0_RX | SYS_PB_L_MFP_PB1_MFP_UART0_TX);
- /* Set PB multi-function pins for Clock Output */
- SYS->PB_H_MFP = (SYS->PB_H_MFP & ~SYS_PB_H_MFP_PB12_MFP_Msk) | SYS_PB_H_MFP_PB12_MFP_CKO;
- /* Set PA.0 multi-function pin for ADC channel 0 */
- SYS->PA_L_MFP = (SYS->PA_L_MFP & ~SYS_PA_L_MFP_PA0_MFP_Msk) | SYS_PA_L_MFP_PA0_MFP_ADC_CH0;
- /* Disable PA.0 digital input path */
- PA->OFFD |= ((1 << 0) << GP_OFFD_OFFD_Pos);
- SYS_EnableTempCtl(); // Enable Temperature Sensor
- SYS_EnableIntVRefBGP(1); // Enable Vref is BGP
- /* Lock protected registers */
- SYS_LockReg();
- }
- void UART0_Init()
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- UART_Open(UART0, 115200);
- }
- int32_t main(void)
- {
- //uint32_t u32Result;
- /* 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 UART0 for printf */
- UART0_Init();
- printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);
- printf("\n This sample code demonstrate measure VDD and Temperature.\n");
- printf(" It convert ADC channel 14, 15 and print conversion result \n");
- printf(" ADC channel 15 is VDD \n");
- printf(" ADC channel 14 is Temperature \n\n");
- // Set ADC
- ADC_Open(ADC, ADC_INPUT_MODE_SINGLE_END, ADC_OPERATION_MODE_SINGLE_CYCLE, ADC_CH_14_MASK | ADC_CH_15_MASK);
- ADC_SetExtraSampleTime(ADC, ADC_CH_14_MASK, 1024);
- ADC_SetVrefVoltage(0); // Set Vref voltage
- // Power on ADC
- ADC_POWER_ON(ADC);
- // Enable ADC ADC_IF interrupt
- ADC_EnableInt(ADC, ADC_ADF_INT);
- NVIC_EnableIRQ(ADC_IRQn);
- ADC_START_CONV(ADC);
- while (1);
- }
- /*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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