Revision 25
fixed interrupt subscription, implemented interrupt handler
| lab2/lab2.c | ||
|---|---|---|
| 4 | 4 |
#include <stdbool.h> |
| 5 | 5 |
#include <stdint.h> |
| 6 | 6 |
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extern int no_interrupts; |
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int main(int argc, char *argv[]) {
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// sets the language of LCF messages (can be either EN-US or PT-PT) |
| 11 | 9 |
lcf_set_language("EN-US");
|
| ... | ... | |
| 42 | 40 |
return 0; |
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} |
| 44 | 42 |
|
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extern uint32_t no_interrupts; |
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int(timer_test_int)(uint8_t time) {
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int ipc_status, r; |
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message msg; |
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uint8_t hook = 0; |
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no_interrupts = 0; |
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uint8_t irq_set = 1; |
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int freq = 60; // better way to get the frequency of the timer???? |
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int freq = 60; // better way to get the frequency of the timer??? |
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printf("Hook pre: %x\n", hook);
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timer_subscribe_int(&hook); |
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printf("Hook pos: %x\n", hook);
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int irq_set = BIT(hook); |
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while (time) {
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/* Get a request message. */ |
| ... | ... | |
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if (is_ipc_notify(ipc_status)) { /* received notification */
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switch (_ENDPOINT_P(msg.m_source)) {
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case HARDWARE: /* hardware interrupt notification */ |
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printf("%x\n", msg.m_notify.interrupts);
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if (msg.m_notify.interrupts & irq_set) { /* subscribed interrupt */
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timer_int_handler(); |
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if (!(no_interrupts % freq)) {
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timer_print_elapsed_time(); |
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time--; |
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} |
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} |
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break; |
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default: |
| ... | ... | |
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} else { /* received standart message, not a notification */
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/* no standart message expected: do nothing */ |
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} |
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if (!(no_interrupts % freq)) {
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timer_print_elapsed_time(); |
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time--; |
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} |
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} |
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|
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timer_unsubscribe_int(); |
| lab2/timer.c | ||
|---|---|---|
| 5 | 5 |
|
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#include "i8254.h" |
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int no_interrupts = 0; |
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|
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int (timer_set_frequency)(uint8_t timer, uint32_t freq) {
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// Frequencies out this range are not supported (by limitation of hardware) |
| ... | ... | |
| 53 | 51 |
int hook_id = 2; |
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|
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int (timer_subscribe_int)(uint8_t *bit_no) {
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*bit_no = hook_id; |
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if(sys_irqsetpolicy(TIMER0_IRQ, IRQ_REENABLE, &hook_id)) return 1; |
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*bit_no = hook_id; |
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return 0; |
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} |
| 60 | 58 |
|
| ... | ... | |
| 63 | 61 |
return 0; |
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} |
| 65 | 63 |
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uint32_t no_interrupts = 0; |
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void (timer_int_handler)() {
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no_interrupts++; |
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} |
| lab2/utils.c | ||
|---|---|---|
| 2 | 2 |
|
| 3 | 3 |
#include <stdint.h> |
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/* Byte Masks */ |
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#define LSB 0xFF /**< @brief mask to filter least significant byte */ |
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|
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int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
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if (lsb == NULL) return 1; |
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*lsb = val & LSB;
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*lsb = (uint8_t)val;
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return 0; |
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} |
| 14 | 11 |
|
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int(util_get_MSB)(uint16_t val, uint8_t *msb) {
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if (msb == NULL) return 1; |
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*msb = val >> 8;
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*msb = (uint8_t)(val >> 8);
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return 0; |
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} |
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|
| ... | ... | |
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if(value == NULL) return 1; |
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uint32_t n = 0; |
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if(sys_inb(port, &n)) return 1; |
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*value = n & LSB;
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*value = (uint8_t)n;
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return 0; |
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} |
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