URL
https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
[/] [eco32/] [trunk/] [hwtests/] [kbdtest/] [main.c] - Rev 118
Go to most recent revision | Compare with Previous | Blame | View Log
/* * main.c -- the main program */ #include "common.h" #include "lib.h" #include "start.h" int charAvail = 0; char charRead; /**************************************************************/ /* * Interrupt and exception messages which will be shown if * the corresponding interrupt or exception is not handled. */ char *exceptionCause[32] = { /* 00 */ "terminal 0 transmitter interrupt", /* 01 */ "terminal 0 receiver interrupt", /* 02 */ "terminal 1 transmitter interrupt", /* 03 */ "terminal 1 receiver interrupt", /* 04 */ "keyboard interrupt", /* 05 */ "unknown interrupt 5", /* 06 */ "unknown interrupt 6", /* 07 */ "unknown interrupt 7", /* 08 */ "disk interrupt", /* 09 */ "unknown interrupt 9", /* 10 */ "unknown interrupt 10", /* 11 */ "unknown interrupt 11", /* 12 */ "unknown interrupt 12", /* 13 */ "unknown interrupt 13", /* 14 */ "timer 0 interrupt", /* 15 */ "timer 1 interrupt", /* 16 */ "bus timeout exception", /* 17 */ "illegal instruction exception", /* 18 */ "privileged instruction exception", /* 19 */ "divide instruction exception", /* 20 */ "trap instruction exception", /* 21 */ "TLB miss exception", /* 22 */ "TLB write exception", /* 23 */ "TLB invalid exception", /* 24 */ "illegal address exception", /* 25 */ "privileged address exception", /* 26 */ "unknown exception 26", /* 27 */ "unknown exception 27", /* 28 */ "unknown exception 28", /* 29 */ "unknown exception 29", /* 30 */ "unknown exception 30", /* 31 */ "unknown exception 31" }; /* * This is the default interrupt service routine. * It simply panics with a message that tells the cause. */ void defaultISR(int irq, InterruptContext *icp) { printf("**** %s ****\n", exceptionCause[irq]); while (1) ; } /* * Initialize all interrupts and exceptions to the default ISR. * Enable interrupts. */ void initInterrupts(void) { int i; for (i = 0; i < 32; i++) { setISR(i, defaultISR); } enable(); } /**************************************************************/ void kbdISR(int irq, InterruptContext *icp) { unsigned int *p; p = (unsigned int *) 0xF0200000; charRead = *(p + 1); charAvail = 1; } void kbdEnable(void) { unsigned int *p; p = (unsigned int *) 0xF0200000; *p = 2; } int main(void) { unsigned char c; int n; printf("Keyboard Test:\n"); printf("initializing interrupts...\n"); initInterrupts(); printf("setting kbd ISR...\n"); setISR(4, kbdISR); printf("enabling kbd interrupt mask bit...\n"); setMask(getMask() | (1 << 4)); printf("enabling interrupts in kbd controller...\n"); kbdEnable(); n = 0; while (1) { while (charAvail == 0) ; disable(); c = charRead; charAvail = 0; enable(); printf("%02X ", c); if (++n == 24) { n = 0; printf("\n"); } } return 0; }
Go to most recent revision | Compare with Previous | Blame | View Log