tm4c 通用定时器向上计数 ， 启动后无法置零，TimerLoadSet（）无效

#include "main.h"

void vGPIO_Config(void);
void vGPIO_PortFIntHandler(void);
void Timer0IntHander(void);
void timer_config(void);

unsigned long k;
char str[50];

int main(void)
{ SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
/* 时钟配置，2.5分频，80Mhz，系统时钟使用PLL，使用外部主时钟源，外部晶振为16MHz */
ILI9341_init(); //液晶屏初始化
ILI9341_clear(GRAY); //清屏
BACK_COLOR=BLUE;
POINT_COLOR=BLACK; vGPIO_Config();
timer_config();
while(1)
{
}
}

void Timer0IntHander(void)
{
TimerIntClear(TIMER0_BASE,TIMER_A);
sprintf(str,"%d",TimerValueGet(TIMER1_BASE,TIMER_A));
ILI9341_draw_string(75,75,str);
TimerLoadSet(TIMER1_BASE,TIMER_A,0);
}

void timer_config(void)
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0); //使能定时器模块Timer0 SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1); //cap
TimerConfigure(TIMER0_BASE,TIMER_CFG_PERIODIC); //配置定时器模块Timer0为Periodic周期性计数模式。 TimerConfigure(TIMER1_BASE,TIMER_CFG_SPLIT_PAIR|TIMER_CFG_A_CAP_COUNT_UP);
TimerLoadSet(TIMER0_BASE,TIMER_A,SysCtlClockGet()-1); //设定定时器模块Timer0的Load重装载值为系统时钟频率的一半再减一（为0.5秒）
TimerLoadSet(TIMER1_BASE,TIMER_A,0);
TimerControlEvent(TIMER1_BASE,TIMER_A,TIMER_EVENT_POS_EDGE);
IntRegister(INT_TIMER0A,Timer0IntHander); //注册中断函数 IntEnable(INT_TIMER0A); //使能定时器模块Timer0的定时器A的中断。
TimerIntEnable(TIMER0_BASE,TIMER_TIMA_TIMEOUT); //使能单独的定时器中断源，第二个是中断源启用的中断事件的标识码，TIMER_TIMA_TIMEOUT的意思是定时器A(TimerA)溢出(重装载)，以此为标志位，当TimerA重装载时就会触发中断。
IntMasterEnable(); //使能处理器中断，使处理器能够响应中断。
IntPrioritySet(INT_TIMER0A, 0); //设置中断优先级，TM4C123G的中断优先级有8个 TimerEnable(TIMER0_BASE,TIMER_A); //使能定时器
TimerEnable(TIMER1_BASE,TIMER_A);
TimerIntClear(TIMER0_BASE,TIMER_A);
}

/* GPIOF中断服务函数 */
void vGPIO_Config(void)
{ ILI9341_clear(YELLOW);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
GPIOPinTypeTimer(GPIO_PORTB_BASE,GPIO_PIN_4);
GPIOPinConfigure(GPIO_PB4_T1CCP0);
}

Susan Yang：

请您尝试一下

TimerDisable（TIMER1_BASE，TIMER_A）;
TimerConfigure（TIMER1_BASE，TIMER_CFG_PERIODIC_UP）;
TimerEnable（TIMER1_BASE，TIMER_A）;
TimerLoadSet（TIMER1_BASE，TIMER_A，0x00FFFFFF）;

Susan Yang：

另外请参考下相关例程

//*****************************************************************************
//
// timers.c - Timers example.
//
// Copyright (c) 2011-2017 Texas Instruments Incorporated.All rights reserved.
// Software License Agreement
//// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//// This is part of revision 2.1.4.178 of the DK-TM4C123G Firmware Package.
//
//*****************************************************************************#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/debug.h"
#include "driverlib/fpu.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
#include "driverlib/timer.h"
#include "driverlib/rom.h"
#include "grlib/grlib.h"
#include "drivers/cfal96x64x16.h"//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Timer (timers)</h1>
//!
//! This example application demonstrates the use of the timers to generate
//! periodic interrupts.One timer is set up to interrupt once per second and
//! the other to interrupt twice per second; each interrupt handler will toggle
//! its own indicator on the display.
//
//*****************************************************************************//*****************************************************************************
//
// Flags that contain the current value of the interrupt indicator as displayed
// on the CSTN display.
//
//*****************************************************************************
uint32_t g_ui32Flags;//*****************************************************************************
//
// Graphics context used to show text on the CSTN display.
//
//*****************************************************************************
tContext g_sContext;//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif//*****************************************************************************
//
// The interrupt handler for the first timer interrupt.
//
//*****************************************************************************
void
Timer0IntHandler(void)
{//// Clear the timer interrupt.//ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);//// Toggle the flag for the first timer.//HWREGBITW(&g_ui32Flags, 0) ^= 1;//// Update the interrupt status on the display.//ROM_IntMasterDisable();GrStringDraw(&g_sContext, (HWREGBITW(&g_ui32Flags, 0) ? "1" : "0"), -1, 68,26, 1);ROM_IntMasterEnable();
}//*****************************************************************************
//
// The interrupt handler for the second timer interrupt.
//
//*****************************************************************************
void
Timer1IntHandler(void)
{//// Clear the timer interrupt.//ROM_TimerIntClear(TIMER1_BASE, TIMER_TIMA_TIMEOUT);//// Toggle the flag for the second timer.//HWREGBITW(&g_ui32Flags, 1) ^= 1;//// Update the interrupt status on the display.//ROM_IntMasterDisable();GrStringDraw(&g_sContext, (HWREGBITW(&g_ui32Flags, 1) ? "1" : "0"), -1, 68,36, 1);ROM_IntMasterEnable();
}//*****************************************************************************
//
// This example application demonstrates the use of the timers to generate
// periodic interrupts.
//
//*****************************************************************************
int
main(void)
{tRectangle sRect;//// Enable lazy stacking for interrupt handlers.This allows floating-point// instructions to be used within interrupt handlers, but at the expense of// extra stack usage.//ROM_FPULazyStackingEnable();//// Set the clocking to run directly from the crystal.//ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |SYSCTL_XTAL_16MHZ);//// Initialize the display driver.//CFAL96x64x16Init();//// Initialize the graphics context and find the middle X coordinate.//GrContextInit(&g_sContext, &g_sCFAL96x64x16);//// Fill the top part of the screen with blue to create the banner.//sRect.i16XMin = 0;sRect.i16YMin = 0;sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;sRect.i16YMax = 9;GrContextForegroundSet(&g_sContext, ClrDarkBlue);GrRectFill(&g_sContext, &sRect);//// Change foreground for white text.//GrContextForegroundSet(&g_sContext, ClrWhite);//// Put the application name in the middle of the banner.//GrContextFontSet(&g_sContext, g_psFontFixed6x8);GrStringDrawCentered(&g_sContext, "timers", -1,GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);//// Initialize timer status display.//GrContextFontSet(&g_sContext, g_psFontFixed6x8);GrStringDraw(&g_sContext, "Timer 0:", -1, 16, 26, 0);GrStringDraw(&g_sContext, "Timer 1:", -1, 16, 36, 0);//// Enable the peripherals used by this example.//ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1);//// Enable processor interrupts.//ROM_IntMasterEnable();//// Configure the two 32-bit periodic timers.//ROM_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);ROM_TimerConfigure(TIMER1_BASE, TIMER_CFG_PERIODIC);ROM_TimerLoadSet(TIMER0_BASE, TIMER_A, ROM_SysCtlClockGet());ROM_TimerLoadSet(TIMER1_BASE, TIMER_A, ROM_SysCtlClockGet() / 2);//// Setup the interrupts for the timer timeouts.//ROM_IntEnable(INT_TIMER0A);ROM_IntEnable(INT_TIMER1A);ROM_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);ROM_TimerIntEnable(TIMER1_BASE, TIMER_TIMA_TIMEOUT);//// Enable the timers.//ROM_TimerEnable(TIMER0_BASE, TIMER_A);ROM_TimerEnable(TIMER1_BASE, TIMER_A);//// Loop forever while the timers run.//while(1){}
}

user5990750：

回复 Susan Yang:

按上面设置之后定时器直接从-65536递增

开始如果第二个句改为配置TimerConfigure(TIMER1_BASE,TIMER_CFG_SPLIT_PAIR|TIMER_CFG_A_CAP_COUNT_UP);    没有效果

Susan Yang：

回复 user5990750:

请您看一下是不是中了勘误表里的

GPTM#15

user5990750：

回复 Susan Yang:

问题好像不是这个