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测试板为LM4F Launchpad
以下为源代码:目的是测试LAUNCHPAD上SW1开关对应GPIO口的中断. #include "inc/hw_memmap.h" #include "inc/hw_types.h" #include "inc/hw_ints.h" #include "driverlib/sysctl.h" #include "driverlib/debug.h" #include "driverlib/fpu.h" #include "driverlib/gpio.h" #include "driverlib/pin_map.h" #include "driverlib/rom.h" #include "driverlib/interrupt.h" void IntGPIOFHandler(void) [ ROM_GPIOPinIntClear(GPIO_PORTF_AHB_BASE,GPIO_PIN_4); ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE,GPIO_PIN_3,0x08); ROM_SysCtlDelay(30000000); ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE,GPIO_PIN_3,0x00); int main() [ //Clock Setting... ROM_SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN); //Enable Peripheral ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); // Enable GPIOF //Configure GPIO Output Type //APBrefers to the Advanced Peripheral Bus, while AHB refers to the Advanced High- //Performance Bus. The AHB offers better back-to-back performance than the APB bus. //GPIO ports accessed through the AHB can toggle every clock cycle vs. once every two //cycles for ports on the APB. In power sensitive applications, the APB would be a better //choice than the AHB. ROM_SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOF); //Enable AHB ROM_GPIOPinTypeGPIOInput(GPIO_PORTF_AHB_BASE,GPIO_PIN_4); //PF4 input for interrupt ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_AHB_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3); //PF1,PF2,PF3 As Output //Interrupt Configure ROM_GPIOIntTypeSet(GPIO_PORTF_AHB_BASE,GPIO_PIN_4,GPIO_LOW_LEVEL); ROM_GPIOPinIntEnable(GPIO_PORTF_AHB_BASE,GPIO_PIN_4); 仿真器执行到这一步的时候,接直接跳到中断处理函数了,而且进去就出不来了... ROM_IntEnable(INT_GPIOF); ROM_IntMasterEnable(); while(1) [ //zz=IntIsEnabled(INT_GPIOF); ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE, GPIO_PIN_1|GPIO_PIN_2,0x0a); ROM_SysCtlDelay(26881720); //About 1s ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE, GPIO_PIN_1|GPIO_PIN_2,0x00); //Attention It's "0x00", not "0" , "0" will not work here. ROM_SysCtlDelay(26881720); ] //return 0; ] |
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