www.pudn.com > zhiyonglou311.rar > Main.c
//--------------------------------------------------------------------------- // Net MAIN.C // // 8051 Web Server project // See Makefile for build notes // Written for Keil C51 V5.1 compiler, notes: // It uses big endian order, which is the same as the // network byte order, unlike x86 systems. // Use OPTIMIZE(2)or higher so that automatic variables get shared // between functions, to stay within the 256 bytes idata space //--------------------------------------------------------------------------- #include#include #include "C8051f.h" #include "net.h" #include "eth.h" #include "serial.h" #include "timer.h" #include "analog.h" #include "arp.h" #include "tcp.h" #include "http.h" #include "ip.h" // Global variables UINT volatile event_word; char xdata text[20]; UCHAR idata debug; UCHAR idata rcve_buf_allocated; // This sets my hardware address to 00:01:02:03:04:05 UCHAR code my_hwaddr[6] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05}; // Hardware addr to send a broadcast UCHAR code broadcast_hwaddr[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; // This sets my IP address to 192.168.0.10 ULONG code my_ipaddr = 0xC0A8000AL; // This sets my subnet mask to 255.255.255.0 ULONG code my_subnet = 0xFFFFFF00L; // Set to 0 if no gateway is present on network ULONG code gateway_ipaddr = 0; //-------------------------------------------------------------------------- // Initialize the memory management routines // Initialize variables declared in main //-------------------------------------------------------------------------- unsigned int Count1msInc; unsigned char Count1ms,Count10ms,Count1s; unsigned char TimeSecond,TimeMinute; void init_main(void) { // Start the memory pool for incoming and outgoing Ethernet // frames at 1000, with length = 1500 bytes. Memory below 500 // is used for program variables init_mempool((void xdata *)1000, 1500); memset(text, 0, sizeof(text)); event_word = 0; rcve_buf_allocated = FALSE; debug = FALSE; } void PORT_Init (void) { XBR0 = 0x07; // Enable SMBus, SPI0, and UART0 XBR1 = 0x00; XBR2 = 0x44; // Enable crossbar and weak pull-ups EMI0TC = 0x21; P74OUT = 0xFF; P0MDOUT = 0x15; } void SPI0_Init (void) { SPI0CFG = 0x07; // data sampled on 1st SCK rising edge // 8-bit data words SPI0CFG|=0xC0; //CKPOL =1; SPI0CN = 0x03; // Master mode; SPI enabled; flags // cleared SPI0CKR = SYSCLK/2/8000000-1; // SPI clock <= 8MHz (limited by // EEPROM spec.) } void Timer0_Init (void) { CKCON|=0x8; TMOD|=0x1; //16Bit Count10ms=10; Count1s=0; TR0 = 0; // STOP Timer0 TH0 = (-SYSCLK/1000) >> 8; // set Timer0 to overflow in 1ms TL0 = -SYSCLK/1000; TR0 = 1; // START Timer0 IE|= 0x2; } void SYSCLK_Init (void) { int i; // delay counter OSCXCN = 0x67; // start external oscillator with // 18.432MHz crystal for (i=0; i < 256; i++) ; // Wait for osc. to start up while (!(OSCXCN & 0x80)) ; // Wait for crystal osc. to settle OSCICN = 0x88; // select external oscillator as SYSCLK // source and enable missing clock // detector // OSCICN = 0x07; //interal 16MHZ } void Timer0_ISR (void) interrupt 1 //1ms { TH0 = (-SYSCLK/1000) >> 8; TL0 = -SYSCLK/1000; if (Count1ms) Count1ms--; Count1msInc++; if (Count10ms) Count10ms--; else { Count10ms=10; //10ms if (Count1s) Count1s--; else { Count1s=100; //1s TimeSecond++; if (TimeSecond>=60) { TimeSecond=0; //1min TimeMinute++; if (TimeMinute==60) TimeMinute=0; } } } } void Delay1ms(unsigned char T) { Count1ms=T; while (Count1ms); } /*通过SPI发送一字节*/ #define CHIP595_SELECT P5 &= ~(0x10); // P54 #define CHIP_NOSELECT P5 |= 0xf8; // P53-57 void SendSPIByte(unsigned char ch) { SPIF = 0; SPI0DAT = ch; while (SPIF == 0); // wait for data transfer to be completed } void LightONOFF(bit b) { CHIP_NOSELECT; CHIP595_SELECT; SendSPIByte(0x0); if (b) { SendSPIByte(0x01); } else { SendSPIByte(0x00); } CHIP_NOSELECT; } void main (void) { UINT j, event_word_copy; UCHAR xdata * inbuf; WDTCN = 0xDE; // Disable watchdog timer WDTCN = 0xAD; EMI0CF =0x24; // share low 4K XRAM SYSCLK_Init (); // initialize oscillator Timer0_Init(); PORT_Init (); // initialize crossbar and GPIO SPI0_Init (); // initialize SPI0 init_main(); init_tcp(); init_http(); EA=1; init_serial(); SendCommString("Init OK\r\n"); init_adc(); init_timer2(); init_arp(); init_8019(); j = 0; ET2 = 1; // Enable timer 2 interrupt // The code below is a priority based RTOS. The event // handlers are in priority order - highest priority first. while (1) { // Query CS8900A to see if Ethernet frame has arrived // If so, set EVENT_ETH_ARRIVED bit in event_word query_8019(); // Use a copy of event word to avoid interference // with interrupts EA = 0; event_word_copy = event_word; EA = 1; // See if an Ethernet frame has arrived if (event_word_copy & EVENT_ETH_ARRIVED) { EA = 0; event_word &= (~EVENT_ETH_ARRIVED); EA = 1; // Allocate a buffer and read frame from CS8900A inbuf = rcve_frame(); if (inbuf != NULL) { // Process the received Ethernet frame eth_rcve(inbuf); // If the memory allocated for the rcve message has // not already been freed then free it now if (rcve_buf_allocated) { free(inbuf); rcve_buf_allocated = FALSE; } } } // See if TCP retransmit timer has expired else if (event_word_copy & EVENT_TCP_RETRANSMIT) { EA = 0; event_word &= (~EVENT_TCP_RETRANSMIT); EA = 1; tcp_retransmit(); } // See if TCP inactivity timer has expired else if (event_word_copy & EVENT_TCP_INACTIVITY) { EA = 0; event_word &= (~EVENT_TCP_INACTIVITY); EA = 1; tcp_inactivity(); } // See if ARP retransmit timer has expired else if (event_word_copy & EVENT_ARP_RETRANSMIT) { EA = 0; event_word &= (~EVENT_ARP_RETRANSMIT); EA = 1; arp_retransmit(); } // See if it is time to age the ARP cache else if (event_word_copy & EVENT_AGE_ARP_CACHE) { EA = 0; event_word &= (~EVENT_AGE_ARP_CACHE); EA = 1; age_arp_cache(); } // See if it is time to read the analog inputs else if (event_word_copy & EVENT_READ_ANALOG) { EA = 0; event_word &= (~EVENT_READ_ANALOG); EA = 1; // Read one of the 3 analog inputs each time read_analog_inputs(); } // See if an RS232 message has arrived. It is // not handled - RS232 is used for sending only else if (event_word_copy & EVENT_RS232_ARRIVED) { EA = 0; event_word &= (~EVENT_RS232_ARRIVED); EA = 1; } } }