說明文件
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使用M460開發版的 ADC 去要 GY-61 Acc 加速度計的data
參考 Opennuvoton 的 EADC_ADINT_Trigger 範例
觀察到 user manual 的 PB0 PB1 PB2 是有接出來可以用的，所以:
/* Set multi-function pins for EADC0 channels. */
SET_EADC0_CH0_PB0();
SET_EADC0_CH1_PB1();
SET_EADC0_CH2_PB2();
看 Example Code 的 channel 0 、 channel 1 、 channel 2 要設定對
/* Configure the sample 4 module for analog input channel 0 and enable ADINT0 trigger source */
EADC_ConfigSampleModule(EADC0, 4, EADC_ADINT0_TRIGGER, 0);
/* Configure the sample 5 module for analog input channel 1 and enable ADINT0 trigger source */
EADC_ConfigSampleModule(EADC0, 5, EADC_ADINT0_TRIGGER, 1);
/* Configure the sample 6 module for analog input channel 2 and enable ADINT0 trigger source */
EADC_ConfigSampleModule(EADC0, 6, EADC_ADINT0_TRIGGER, 2);
實體接線
/**************************************************************************//**
* @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();
/* 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 0, 1, 2 )\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, 0);
/* Configure the sample 5 module for analog input channel 11 and enable ADINT0 trigger source */
EADC_ConfigSampleModule(EADC0, 5, EADC_ADINT0_TRIGGER, 1);
/* Configure the sample 6 module for analog input channel 14 and enable ADINT0 trigger source */
EADC_ConfigSampleModule(EADC0, 6, EADC_ADINT0_TRIGGER, 2);
///* Configure the sample 7 module for analog input channel 15 and enable ADINT0 trigger source */
//EADC_ConfigSampleModule(EADC0, 7, EADC_ADINT0_TRIGGER, 3);
/* 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]);
}
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);
/* 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. ***/