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[参考译文] TM4C123GH6PM：需要ADC计时器中断帮助

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Guru**** 2531950 points


请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1101495/tm4c123gh6pm-need-help-with-adc-timer-interrupt

部件号：TM4C123GH6PM

我希望有人可以查看我的代码，并帮助我找出它不起作用的原因。 我正在尝试通过板载ADC对模拟音频信号进行采样。 当我使用ADC_Trigger_Processor配置ADC序列时，我可以得到一个读数，但是当我添加定期计时器并尝试使用ADC_Trigger_Timer配置它时，我无法使我的代码正常工作。 据我所能说，中断从未发生过。 我正在使用TivaWare外设驱动程序库功能。 我的实验室讲师查看了我的代码，告诉我一切看起来都是正确的，他也不明白为什么代码也不起作用。 下面是我的主要代码： 

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/debug.h"
#include "driverlib/sysctl.h"
#include "driverlib/adc.h"
#include "driverlib/interrupt.h"
#include "inc/tm4c123gh6pm.h"
#include "driverlib/gpio.h"
#include "driverlib/timer.h"


uint32_t ui32Sample;

// GPIO initialization
void GPIO_Init(void){
	  //
    // Enable Peripheral Clocks 
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);

    //
    // Enable pin PE3 for ADC AIN0
    //
    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3);
}

//ADC0 initializaiton
void ADC0_Init(void)
{
	
		SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_16MHZ); // configure the system clock to be 40MHz
		SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);	//activate the clock of ADC0
		SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0); //activate the clock of Timer0
		SysCtlDelay(2);	//insert a few cycles after enabling the peripheral to allow the clock to be fully activated.
	
	
		TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC); // configure Timer0 as periodic
		TimerLoadSet(TIMER0_BASE, TIMER_A, 10000); //load Timer0A with period of 10000 clock cycles
		//IntPrioritySet(INT_TIMER0A, 0x00);  	 // configure Timer0A interrupt priority as 0
		
		ADCSequenceDisable(ADC0_BASE, 3); //disable ADC0 before the configuration is complete
		ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_TIMER, 0); // will use ADC0, SS3, processor-trigger, priority 0
	
		//ADC0 SS3 Step 0, sample from ADC SS3 channel 0, completion of this step will set RIS, last sample of the sequence
		ADCSequenceStepConfigure(ADC0_BASE,3,0,ADC_CTL_CH0|ADC_CTL_IE|ADC_CTL_END); 
		
		IntPrioritySet(INT_ADC0SS3, 0x00);  	 // configure ADC0 SS3 interrupt priority as 0
		IntEnable(INT_ADC0SS3);    				// enable interrupt on ADC0 SS3
		ADCIntEnableEx(ADC0_BASE, ADC_INT_SS3);      // arm interrupt of ADC0 SS3
	
		TimerControlTrigger(TIMER0_BASE, TIMER_A, true); // specifies trigger timer
		ADCSequenceEnable(ADC0_BASE, 3); //enable ADC0

		
}
		
//interrupt handler
void ADC0_Handler(void)
{
		ADCIntClear(ADC0_BASE, 3); // clear the interrupt
		ADCSequenceDataGet(ADC0_BASE, 3, &ui32Sample); // collect sample data from PE3
}

int main(void)
{				
		ADC0_Init();	// initialize ADC0 and Timer0
		GPIO_Init();				// initialize gpio
		IntMasterEnable();  // globally enable interrupt
	
		while(1)
		{
			
		}
}

下面是我编辑过的startup rvmdk. s文件的一部分： 

;******************************************************************************
;
; External declarations for the interrupt handlers used by the application.
;
;******************************************************************************
       EXTERN  ADC0_Handler

;******************************************************************************
;
; The vector table.
;
;******************************************************************************
        EXPORT  __Vectors
__Vectors
        DCD     StackMem + Stack            ; Top of Stack
        DCD     Reset_Handler               ; Reset Handler
        DCD     NmiSR                       ; NMI Handler
        DCD     FaultISR                    ; Hard Fault Handler
        DCD     IntDefaultHandler           ; The MPU fault handler
        DCD     IntDefaultHandler           ; The bus fault handler
        DCD     IntDefaultHandler           ; The usage fault handler
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; SVCall handler
        DCD     IntDefaultHandler           ; Debug monitor handler
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; The PendSV handler
        DCD     IntDefaultHandler           ; The SysTick handler
        DCD     IntDefaultHandler           ; GPIO Port A
        DCD     IntDefaultHandler           ; GPIO Port B
        DCD     IntDefaultHandler           ; GPIO Port C
        DCD     IntDefaultHandler           ; GPIO Port D
        DCD     IntDefaultHandler           ; GPIO Port E
        DCD     IntDefaultHandler           ; UART0 Rx and Tx
        DCD     IntDefaultHandler           ; UART1 Rx and Tx
        DCD     IntDefaultHandler           ; SSI0 Rx and Tx
        DCD     IntDefaultHandler           ; I2C0 Master and Slave
        DCD     IntDefaultHandler           ; PWM Fault
        DCD     IntDefaultHandler           ; PWM Generator 0
        DCD     IntDefaultHandler           ; PWM Generator 1
        DCD     IntDefaultHandler           ; PWM Generator 2
        DCD     IntDefaultHandler           ; Quadrature Encoder 0
        DCD     IntDefaultHandler           ; ADC Sequence 0
        DCD     IntDefaultHandler        	; ADC Sequence 1
        DCD     IntDefaultHandler           ; ADC Sequence 2
        DCD     ADC0_Handler           ; ADC Sequence 3
        DCD     IntDefaultHandler           ; Watchdog timer
        DCD     IntDefaultHandler           ; Timer 0 subtimer A
        DCD     IntDefaultHandler           ; Timer 0 subtimer B
        DCD     IntDefaultHandler           ; Timer 1 subtimer A
        DCD     IntDefaultHandler           ; Timer 1 subtimer B
        DCD     IntDefaultHandler           ; Timer 2 subtimer A
        DCD     IntDefaultHandler           ; Timer 2 subtimer B
        DCD     IntDefaultHandler           ; Analog Comparator 0
        DCD     IntDefaultHandler           ; Analog Comparator 1
        DCD     IntDefaultHandler           ; Analog Comparator 2
        DCD     IntDefaultHandler           ; System Control (PLL, OSC, BO)
        DCD     IntDefaultHandler           ; FLASH Control
        DCD     IntDefaultHandler           ; GPIO Port F
        DCD     IntDefaultHandler           ; GPIO Port G
        DCD     IntDefaultHandler           ; GPIO Port H
        DCD     IntDefaultHandler           ; UART2 Rx and Tx
        DCD     IntDefaultHandler           ; SSI1 Rx and Tx
        DCD     IntDefaultHandler           ; Timer 3 subtimer A
        DCD     IntDefaultHandler           ; Timer 3 subtimer B
        DCD     IntDefaultHandler           ; I2C1 Master and Slave
        DCD     IntDefaultHandler           ; Quadrature Encoder 1
        DCD     IntDefaultHandler           ; CAN0
        DCD     IntDefaultHandler           ; CAN1
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; Hibernate
        DCD     IntDefaultHandler           ; USB0
        DCD     IntDefaultHandler           ; PWM Generator 3
        DCD     IntDefaultHandler           ; uDMA Software Transfer
        DCD     IntDefaultHandler           ; uDMA Error
        DCD     IntDefaultHandler           ; ADC1 Sequence 0
        DCD     IntDefaultHandler           ; ADC1 Sequence 1
        DCD     IntDefaultHandler           ; ADC1 Sequence 2
        DCD     IntDefaultHandler           ; ADC1 Sequence 3
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; GPIO Port J
        DCD     IntDefaultHandler           ; GPIO Port K
        DCD     IntDefaultHandler           ; GPIO Port L
        DCD     IntDefaultHandler           ; SSI2 Rx and Tx
        DCD     IntDefaultHandler           ; SSI3 Rx and Tx
        DCD     IntDefaultHandler           ; UART3 Rx and Tx
        DCD     IntDefaultHandler           ; UART4 Rx and Tx
        DCD     IntDefaultHandler           ; UART5 Rx and Tx
        DCD     IntDefaultHandler           ; UART6 Rx and Tx
        DCD     IntDefaultHandler           ; UART7 Rx and Tx
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; I2C2 Master and Slave
        DCD     IntDefaultHandler           ; I2C3 Master and Slave
        DCD     IntDefaultHandler           ; Timer 4 subtimer A
        DCD     IntDefaultHandler           ; Timer 4 subtimer B
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; Timer 5 subtimer A
        DCD     IntDefaultHandler           ; Timer 5 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 0 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 0 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 1 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 1 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 2 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 2 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 3 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 3 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 4 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 4 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 5 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 5 subtimer B
        DCD     IntDefaultHandler           ; FPU
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; I2C4 Master and Slave
        DCD     IntDefaultHandler           ; I2C5 Master and Slave
        DCD     IntDefaultHandler           ; GPIO Port M
        DCD     IntDefaultHandler           ; GPIO Port N
        DCD     IntDefaultHandler           ; Quadrature Encoder 2
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; GPIO Port P (Summary or P0)
        DCD     IntDefaultHandler           ; GPIO Port P1
        DCD     IntDefaultHandler           ; GPIO Port P2
        DCD     IntDefaultHandler           ; GPIO Port P3
        DCD     IntDefaultHandler           ; GPIO Port P4
        DCD     IntDefaultHandler           ; GPIO Port P5
        DCD     IntDefaultHandler           ; GPIO Port P6
        DCD     IntDefaultHandler           ; GPIO Port P7
        DCD     IntDefaultHandler           ; GPIO Port Q (Summary or Q0)
        DCD     IntDefaultHandler           ; GPIO Port Q1
        DCD     IntDefaultHandler           ; GPIO Port Q2
        DCD     IntDefaultHandler           ; GPIO Port Q3
        DCD     IntDefaultHandler           ; GPIO Port Q4
        DCD     IntDefaultHandler           ; GPIO Port Q5
        DCD     IntDefaultHandler           ; GPIO Port Q6
        DCD     IntDefaultHandler           ; GPIO Port Q7
        DCD     IntDefaultHandler           ; GPIO Port R
        DCD     IntDefaultHandler           ; GPIO Port S
        DCD     IntDefaultHandler           ; PWM 1 Generator 0
        DCD     IntDefaultHandler           ; PWM 1 Generator 1
        DCD     IntDefaultHandler           ; PWM 1 Generator 2
        DCD     IntDefaultHandler           ; PWM 1 Generator 3
        DCD     IntDefaultHandler           ; PWM 1 Fault

;******************************************************************************

我不知道它是否重要，但我使用的是Kiel的uVision IDE和Stellaris IDCI调试器。 希望有人能看看这件事，告诉我我是否错过了什么。

  • 0
    TI__Guru**** 2531950 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    您好Chris，

    您的代码有两件事，我已确定： 

    ADCIntEnableEx(ADC0_BASE, ADC_INT_SS3);      // arm interrupt of ADC0 SS3

    该API调用适用于TM4C129x设备，您的POST指示您正在使用TM4C123G6HPM。 如果正确，则需要使用以下内容： 

        //
    // Enable the ADC 0 sample sequence 3 interrupt.
    //
    ADCIntEnable(ADC0_BASE, 3);

     另一个遗漏是，要触发ADC采样过程，最后一步是激活计时器本身： 

        /* All configuration are completed, enable Timer 0A which will trigger
    the ADC sampling process. */
    TimerEnable(TIMER0_BASE, TIMER_A);

    这两个更改应该会让您滚动。

    此致，

    Ralph Jacobi

  • 0
    TI__Guru**** 2531950 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    我实施了这两项更改，现在就开始工作了，谢谢！