/* ********************************************************************** * File S1deb3.C - Rel. 1.1 compile with uC/51 V. 1.10.7 * * GRIFO(R) via Dell'Artigiano 8/6 40016 S. Giorgio di Piano (BO) * * Cards: GPC 550 d.s. 200702 and DEB01 or TIO16 * * Tel. +39 051 892052 Fax. +39 051 893661 * * http://www.grifo.com http://www.grifo.it * * sales@grifo.it tech@grifo.it grifo@grifo.it * * by Graziano Gaiba del 09.09.03 * ********************************************************************** Rel. 1.1 - 09.09.2003 by Graziano Gaiba Connect CN2 of GPC(r) 550 to CN15 of DEB01 or CN1 of TIO16 through a 20 pins flat. This program shows the status of port C on the lines of port A. */ #include #include #include // Clock frequency of CPU used #define FCLOCK 22118400 // On board peripherals registers allocation addresses. static unsigned char PORTA @ 0xFFF4, PORTB @ 0xFFF5, PORTC @ 0xFFF6, CNT @ 0xFFF7; /********* General purpose utilities and hw sections management ***********/ void iniser(unsigned long baud) /* Initialise serial port with: Bit x chr = 8 Stop bit = 1 Parity = None Baud rate = baud using timer 1 as baud rate generator. */ { SCON=0x052; // Modo 1, receiver enabled TMOD&=0x00F; // Timer 1 in auto-reload mode TMOD|=0x020; TR1=0; // Stop TIMER 1 TH1=256-((2*FCLOCK)/(384*baud)); // baud at 14.7456 MHz PCON=PCON|0x080; // Set SMOD=1 for higher baud rate TR1=1; // Start TIMER 1 } // Wait for signals settling void setup(void) { unsigned int i; for(i=10000; i!=0; i--) ; } // Initialise 82c55 with value in parameter void init8255(unsigned char c) { CNT=c; } // Set port A of 82c55 void setPortA(unsigned char v) { PORTA=v; } // Set port B of 82c55 void setPortB(unsigned char v) { PORTB=v; } // Set port C of 82c55 void setPortC(unsigned char v) { PORTC=v; } // Get port A of 82c55 unsigned char getPortA(void) { return PORTA; } // Get port B of 82c55 unsigned char getPortB(void) { return PORTB; } // Get port C of 82c55 unsigned char getPortC(void) { return PORTC; } // Delay to prevent serial line overrun void ritardo(void) { unsigned int i; for(i=0xffff; i!=0; i--) ; } // **************************** Main program ***************************** void main(void) { setup(); // Wait for signals settling iniser(19200); TI=0; RI=0; // Comment next two lines if serial port is used in polling (SIOTYPE=p or k) ES=1; // Enable serial port interrupt EA=1; // Enable all interrupts // Initialisation of PPI 8255. init8255(0x89); // PORT A, B, in OUTPUT, PORT C in INPUT. puts("********************* Demo S1DEB3 **********************"); puts(""); puts("Shows status of PORT C on PORT A."); for (;;) // Loop forever. { setPortA(getPortC()); } }