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您现在的位置： FPGA开发板 FPGA 开发板 SOPC开发板 DSP开发板 视频开发板 －嵌入式控制研究室 >> SOPC >> Nios >> 文章正文 |  用户登录  新用户注册 |
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| nios ii的 中断 | |||||
| 作者：佚名 文章来源：互联网 点击数： 更新时间：2006-7-10 | |||||
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the corresponding PIO input port. Interrupt behavior depends on the hardware configuration of the PIO core。 几点重要的： 1. 中断io的方向 2. 中断功能的enable 3. 写一个 中断响应函数EXT_INT8_IRQ_ISR 4. 调用alt_irq_register（）注册 中断响应函数EXT_INT8_IRQ_ISR 相关文档 ..\altera\kits\nios2_51\documents\n2sw_nii5v2.pdf //软件 ..\altera\kits\nios2_51\documents\n2sw_nii5v3.pdf //硬件 #include <stdio.h> #include <string.h> #include "io.h" #include "system.h" #include "altera_avalon_pio_regs.h" #include "alt_types.h" #include "sys/alt_irq.h" volatile alt_irq_context g_context; void test_Led(alt_u32 dwDelay); void Init_Ext_interrupt(); //C:\altera\kits\nios2_51\documents\n2sw_nii5v2.pdf static void EXT_INT8_IRQ_ISR(void * context,alt_u32 id) { volatile int* g_context_ptr = (volatile int*) context; IOWR_ALTERA_AVALON_PIO_IRQ_MASK(EXT_INT8_BASE, 0x0); printf("disable interrupt\n"); *g_context_ptr = IORD_ALTERA_AVALON_PIO_EDGE_CAP(EXT_INT8_BASE); printf("edge capture register in *context.=%x\n",*g_context_ptr); switch (*g_context_ptr) { case 0x10: printf("button1 is pressed\n"); break; case 0x20: printf("button2 is pressed\n"); break; default: break; } IOWR_ALTERA_AVALON_PIO_EDGE_CAP(EXT_INT8_BASE, 0); printf("Reset edge capture register\n"); IOWR_ALTERA_AVALON_PIO_IRQ_MASK(EXT_INT8_BASE,0x30);//set two button to 0 ensable interrupts //test_Led(500000); } int main() { alt_u8 led = 0x2; alt_u8 loop = 5; volatile int i; printf("alt_main() \n"); while(loop--) { printf("while(loop=%d) \n" , loop); test_Led(500000); } Init_Ext_interrupt(); while (1) { printf("while (1)\n"); test_Led(5000000); } return 0; } void test_Led(alt_u32 dwDelay) { unsigned char led=0x05; unsigned long i = 8; usleep(dwDelay); IOWR(LED_BASE,1,0xFF); IOWR(LED_BASE,0,led); //printf("test_Led() \n");// usleep(dwDelay); led =~led; IOWR(LED_BASE,0,led); } void Init_Ext_interrupt() { printf("Init_Ext_interrupt() Enter\n"); //-- Reset the edge capture register. IOWR_ALTERA_AVALON_PIO_EDGE_CAP(EXT_INT8_IRQ, 0x0); //-- Set derection as input IOWR_ALTERA_AVALON_PIO_DIRECTION(EXT_INT8_BASE,0x00);//input //-- enable bit5 and bit4 to implement interrupt IOWR_ALTERA_AVALON_PIO_IRQ_MASK(EXT_INT8_BASE,0x30);//set two button to 0 ensable interrupts //-- register irq_function alt_irq_register(EXT_INT8_IRQ,(void*)&g_context,EXT_INT8_IRQ_ISR); //-------- printf("Init_Ext_interrupt() Exit\n"); } //------------------------------------------------------------------------------- //-- Result //------------------------------------------------------------------------------- nios2-terminal: connected to hardware target using JTAG UART on cable nios2-terminal: "ByteBlasterII [LPT1]", device 1, instance 0 nios2-terminal: Warning: The JTAG cable you are using is not supported for Nios nios2-terminal: II systems. You may experience intermittent JTAG communication nios2-terminal: failures with this cable. Please use a USB Blaster revision B nios2-terminal: cable or another supported cable. Please refer to the file nios2-terminal: errata.txt included in the Nios II development kit documents nios2-terminal: directory for more information. nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate) alt_main() while(loop=4) while(loop=3) while(loop=2) while(loop=1) while(loop=0) Init_Ext_interrupt() Enter Init_Ext_interrupt() Exit while (1) disable interrupt edge capture register in *context.=2f Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=10 button1 is pressed Reset edge capture register while (1) disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register disable interrupt edge capture register in *context.=20 button2 is pressed Reset edge capture register while (1) while (1) while (1) |
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| 文章录入：fengfeiyi 责任编辑：fengfeiyi | |||||
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