TI中文支持网#include <stdbool.h>
#include <stdint.h>
#include "hw_memmap.h"
#include "adc.h"
#include "gpio.h"
#include "pin_map.h"
#include "sysctl.h"
#include "uart.h"
#include "uartstdio.h"
void Init(void);
int main(void)
{
uint32_t pui32ADC0Value[1];
//InitConsole();
Init();
//UARTprintf("ADC ->\n");
//UARTprintf("Type: Single Ended\n");
//UARTprintf("Samples: One\n");
//UARTprintf("Update Rate: 250ms\n");
//UARTprintf("Input Pin: AIN0/PE7\n\n");
while(1)
{
ADCProcessorTrigger(ADC0_BASE, 3);
while(!ADCIntStatus(ADC0_BASE, 3, false))
{}
ADCIntClear(ADC0_BASE, 3);
ADCSequenceDataGet(ADC0_BASE, 3, pui32ADC0Value);
UARTprintf("AIN0 = %4d\r", pui32ADC0Value[0]);
SysCtlDelay(SysCtlClockGet() / 12);
}
}
void Init(void)
{
SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); //ʹÄÜGPIOA
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE); //ʹÄÜGPIOE
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); //ʹÄÜ´®¿Ú0
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0); //ʹÄÜADC0Ä£¿é
GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PA1_U0TX);
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3);
UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);
UARTStdioConfig(0, 115200, 16000000);
ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);
ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH0 | ADC_CTL_IE | ADC_CTL_END);
ADCSequenceEnable(ADC0_BASE, 3);
ADCIntClear(ADC0_BASE, 3);
}
xyz549040622：
加断点，应该是停止到
while(!ADCIntStatus(ADC0_BASE, 3, false)) {}
这里了。我记得这是官方的例程，我的可以一直输出ad值的。
lingxin deng：
回复 xyz549040622:
可否把你的程序发我一份啊，谢谢了！
lingxin deng：
回复 xyz549040622:
这就是官方的例程，只是我改了一些代码的顺序（没改之前也不行）。没改之前，在线调试的时候运行到第二个的UartPrintf（）函数，就卡住了，不知道为什么。
xyz549040622：
回复 lingxin deng:
我觉得是你设置系统时钟的时候，分频设置小了，这样下来主频才10Mhz，是设置4分频试试。其他代码都没问题的。
lingxin deng：
回复 xyz549040622:
我重新设置了主频，但还是不行
lingxin deng：
有没有TI的大牛来解答一下啊
lingxin deng：
回复 xyz549040622:
朋友，可以把你的程序发我一份么，还是没有调出来，真心谢谢了，比较急
xyz549040622：
回复 lingxin deng:
//***************************************************************************** // // single_ended.c - Example demonstrating how to configure the ADC for //single ended operation. // // Copyright (c) 2010-2016 Texas Instruments Incorporated.All rights reserved. // Software License Agreement ////Redistribution and use in source and binary forms, with or without //modification, are permitted provided that the following conditions //are met: // //Redistributions of source code must retain the above copyright //notice, this list of conditions and the following disclaimer. // //Redistributions in binary form must reproduce the above copyright //notice, this list of conditions and the following disclaimer in the //documentation and/or other materials provided with the //distribution. // //Neither the name of Texas Instruments Incorporated nor the names of //its contributors may be used to endorse or promote products derived //from this software without specific prior written permission. //// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. //// This is part of revision 2.1.3.156 of the Tiva Firmware Development Package. // //*****************************************************************************#include <stdbool.h> #include <stdint.h> #include "inc/hw_memmap.h" #include "driverlib/adc.h" #include "driverlib/gpio.h" #include "driverlib/pin_map.h" #include "driverlib/sysctl.h" #include "driverlib/uart.h" #include "utils/uartstdio.h"//***************************************************************************** // //! \addtogroup adc_examples_list //! <h1>Single Ended ADC (single_ended)</h1> //! //! This example shows how to setup ADC0 as a single ended input and take a //! single sample on AIN0/PE3. //! //! This example uses the following peripherals and I/O signals.You must //! review these and change as needed for your own board: //! - ADC0 peripheral //! - GPIO Port E peripheral (for AIN0 pin) //! - AIN0 - PE3 //! //! The following UART signals are configured only for displaying console //! messages for this example.These are not required for operation of the //! ADC. //! - UART0 peripheral //! - GPIO Port A peripheral (for UART0 pins) //! - UART0RX - PA0 //! - UART0TX - PA1 //! //! This example uses the following interrupt handlers.To use this example //! in your own application you must add these interrupt handlers to your //! vector table. //! - None. // //*****************************************************************************//***************************************************************************** // // This function sets up UART0 to be used for a console to display information // as the example is running. // //***************************************************************************** void InitConsole(void) {//// Enable GPIO port A which is used for UART0 pins.// TODO: change this to whichever GPIO port you are using.//SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);//// Configure the pin muxing for UART0 functions on port A0 and A1.// This step is not necessary if your part does not support pin muxing.// TODO: change this to select the port/pin you are using.//GPIOPinConfigure(GPIO_PA0_U0RX);GPIOPinConfigure(GPIO_PA1_U0TX);//// Enable UART0 so that we can configure the clock.//SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);//// Use the internal 16MHz oscillator as the UART clock source.//UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);//// Select the alternate (UART) function for these pins.// TODO: change this to select the port/pin you are using.//GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);//// Initialize the UART for console I/O.//UARTStdioConfig(0, 115200, 16000000); }//***************************************************************************** // // Configure ADC0 for a single-ended input and a single sample.Once the // sample is ready, an interrupt flag will be set.Using a polling method, // the data will be read then displayed on the console via UART0. // //***************************************************************************** int main(void) {//// This array is used for storing the data read from the ADC FIFO. It// must be as large as the FIFO for the sequencer in use.This example// uses sequence 3 which has a FIFO depth of 1.If another sequence// was used with a deeper FIFO, then the array size must be changed.//uint32_t pui32ADC0Value[1];//// Set the clocking to run at 20 MHz (200 MHz / 10) using the PLL.When// using the ADC, you must either use the PLL or supply a 16 MHz clock// source.// TODO: The SYSCTL_XTAL_ value must be changed to match the value of the// crystal on your board.//SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |SYSCTL_XTAL_16MHZ);//// Set up the serial console to use for displaying messages.This is// just for this example program and is not needed for ADC operation.//InitConsole();//// Display the setup on the console.//UARTprintf("ADC ->\n");UARTprintf("Type: Single Ended\n");UARTprintf("Samples: One\n");UARTprintf("Update Rate: 250ms\n");UARTprintf("Input Pin: AIN0/PE3\n\n");//// The ADC0 peripheral must be enabled for use.//SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);//// For this example ADC0 is used with AIN0 on port E7.// The actual port and pins used may be different on your part, consult// the data sheet for more information.GPIO port E needs to be enabled// so these pins can be used.// TODO: change this to whichever GPIO port you are using.//SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);//// Select the analog ADC function for these pins.// Consult the data sheet to see which functions are allocated per pin.// TODO: change this to select the port/pin you are using.//GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3);//// Enable sample sequence 3 with a processor signal trigger.Sequence 3// will do a single sample when the processor sends a signal to start the// conversion.Each ADC module has 4 programmable sequences, sequence 0// to sequence 3.This example is arbitrarily using sequence 3.//ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);//// Configure step 0 on sequence 3.Sample channel 0 (ADC_CTL_CH0) in// single-ended mode (default) and configure the interrupt flag// (ADC_CTL_IE) to be set when the sample is done.Tell the ADC logic// that this is the last conversion on sequence 3 (ADC_CTL_END).Sequence// 3 has only one programmable step.Sequence 1 and 2 have 4 steps, and// sequence 0 has 8 programmable steps.Since we are only doing a single// conversion using sequence 3 we will only configure step 0.For more// information on the ADC sequences and steps, reference the datasheet.//ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH0 | ADC_CTL_IE |ADC_CTL_END);//// Since sample sequence 3 is now configured, it must be enabled.//ADCSequenceEnable(ADC0_BASE, 3);//// Clear the interrupt status flag.This is done to make sure the// interrupt flag is cleared before we sample.//ADCIntClear(ADC0_BASE, 3);//// Sample AIN0 forever.Display the value on the console.//while(1){//// Trigger the ADC conversion.//ADCProcessorTrigger(ADC0_BASE, 3);//// Wait for conversion to be completed.//while(!ADCIntStatus(ADC0_BASE, 3, false)){}//// Clear the ADC interrupt flag.//ADCIntClear(ADC0_BASE, 3);//// Read ADC Value.//ADCSequenceDataGet(ADC0_BASE, 3, pui32ADC0Value);//// Display the AIN0 (PE3) digital value on the console.//UARTprintf("AIN0 = %4d\r", pui32ADC0Value[0]);//// This function provides a means of generating a constant length// delay.The function delay (in cycles) = 3 * parameter.Delay// 250ms arbitrarily.//SysCtlDelay(SysCtlClockGet() / 12);} }这是我的代码，一直串口输出没问题，用的是EK-TM4C123x的板子，串口输出信息如下
41 49 4E 30 20 3D 20 20 34 31 32 0D 41 49 4E 30 20 3D 20 20 20 36 38 0D 41 49 4E 30 20 3D 20 20 34 32 32 0D 41 49 4E 30 20 3D 20 20 20 36 34 0D 41 49 4E 30 20 3D 20 20 34 32 30 0D 41 49 4E 30 20 3D 20 20 20 36 38 0D AIN0 =424 AIN0 =68 AIN0 =416 AIN0 =72 AIN0 =408 AIN0 =72 AIN0 =388 AIN0 =80 AIN0 =369 AIN0 =78 AIN0 =345 AIN0 =80 AIN0 =298 AIN0 =73 AIN0 =256 AIN0 =84 AIN0 =228 AIN0 =72 AIN0 =165 AIN0 =52 AIN0 =148 AIN0 =104 AIN0 =127 AIN0 =124 AIN0 =104 AIN0 =168 AIN0 =100 AIN0 =212 AIN0 =100 AIN0 =264 AIN0 =96 AIN0 =316 AIN0 =94 AIN0 =356 AIN0 =84 AIN0 =371 AIN0 =76 AIN0 =392 AIN0 =60 AIN0 =414 AIN0 =56
