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5bb41957ef
Not particularly useful in the current system, but gives an example of how to handle interrupts.
41 lines
901 B
C
41 lines
901 B
C
// Copyright lowRISC contributors.
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// Licensed under the Apache License, Version 2.0, see LICENSE for details.
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// SPDX-License-Identifier: Apache-2.0
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#include "simple_system_common.h"
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int main(int argc, char **argv) {
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pcount_enable(0);
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pcount_reset();
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pcount_enable(1);
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puts("Hello simple system\n");
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puthex(0xDEADBEEF);
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putchar('\n');
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puthex(0xBAADF00D);
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putchar('\n');
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pcount_enable(0);
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// Enable periodic timer interrupt
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// (the actual timebase is a bit meaningless in simulation)
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timer_enable(2000);
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uint64_t last_elapsed_time = get_elapsed_time();
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while (last_elapsed_time <= 4) {
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uint64_t cur_time = get_elapsed_time();
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if (cur_time != last_elapsed_time) {
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last_elapsed_time = cur_time;
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if (last_elapsed_time & 1) {
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puts("Tick!\n");
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} else {
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puts("Tock!\n");
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}
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}
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asm volatile("wfi");
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}
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return 0;
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}
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