Revision 20
timer_test_int prototype
| lab2/i8254.h | ||
|---|---|---|
| 9 | 9 |
* Constants for programming the i8254 Timer. Needs to be completed. |
| 10 | 10 |
*/ |
| 11 | 11 |
|
| 12 |
#define TIMER_FREQ 1193182 /**< @brief clock frequency for timer in PC and AT */ |
|
| 12 |
#define TIMER_FREQ 1193182 /**< @brief clock frequency for timer in PC and AT */
|
|
| 13 | 13 |
#define TIMER_MIN_FREQ 19 /**< @brief mininum frequency for timer */ |
| 14 |
#define TIMER0_IRQ 0 /**< @brief Timer 0 IRQ line */ |
|
| 14 |
#define TIMER0_IRQ 0 /**< @brief Timer 0 IRQ line */
|
|
| 15 | 15 |
|
| 16 |
|
|
| 17 | 16 |
/* I/O port addresses */ |
| 18 | 17 |
|
| 19 | 18 |
#define TIMER_0 0x40 /**< @brief Timer 0 count register */ |
| lab2/lab2.c | ||
|---|---|---|
| 4 | 4 |
#include <stdbool.h> |
| 5 | 5 |
#include <stdint.h> |
| 6 | 6 |
|
| 7 |
int no_interrupts = 0; |
|
| 7 | 8 |
|
| 8 | 9 |
int main(int argc, char *argv[]) {
|
| 9 | 10 |
// sets the language of LCF messages (can be either EN-US or PT-PT) |
| ... | ... | |
| 42 | 43 |
} |
| 43 | 44 |
|
| 44 | 45 |
int(timer_test_int)(uint8_t time) {
|
| 45 |
/* To be implemented by the students */
|
|
| 46 |
printf("%s is not yet implemented!\n", __func__);
|
|
| 46 |
int ipc_status, r;
|
|
| 47 |
message msg;
|
|
| 47 | 48 |
|
| 48 |
return 1; |
|
| 49 |
uint8_t hook = 0; |
|
| 50 |
int no_interrupts = 0; |
|
| 51 |
int freq = 60; // better way to get the frequency of the timer???? |
|
| 52 |
|
|
| 53 |
timer_subscribe_int(&hook); |
|
| 54 |
|
|
| 55 |
while (no_interrupts < time * freq) {
|
|
| 56 |
/* Get a request message. */ |
|
| 57 |
if ((r = driver_receive(ANY, &msg, &ipc_status)) != 0) {
|
|
| 58 |
printf("driver_receive failed with %d", r);
|
|
| 59 |
continue; |
|
| 60 |
} |
|
| 61 |
if (is_ipc_notify(ipc_status)) { /* received notification */
|
|
| 62 |
switch (_ENDPOINT_P(msg.m_source)) {
|
|
| 63 |
case HARDWARE: /* hardware interrupt notification */ |
|
| 64 |
if (msg.m_notify.interrupts & irq_set) { /* subscribed interrupt */
|
|
| 65 |
timer_int_handler(); |
|
| 66 |
} |
|
| 67 |
break; |
|
| 68 |
default: |
|
| 69 |
break; /* no other notifications expected: do nothing */ |
|
| 70 |
} |
|
| 71 |
} else { /* received standart message, not a notification */
|
|
| 72 |
/* no standart message expected: do nothing */ |
|
| 73 |
} |
|
| 74 |
if (!(no_interrupts % freq)) |
|
| 75 |
timer_print_elapsed_time(); |
|
| 76 |
} |
|
| 77 |
|
|
| 78 |
timer_unsubscribe_int(&hook); |
|
| 79 |
|
|
| 80 |
return 0; |
|
| 49 | 81 |
} |
| lab2/timer.c | ||
|---|---|---|
| 63 | 63 |
} |
| 64 | 64 |
|
| 65 | 65 |
void (timer_int_handler)() {
|
| 66 |
/* To be implemented by the students */ |
|
| 67 |
printf("%s is not yet implemented!\n", __func__);
|
|
| 66 |
int no_interrupts = 0; //should be the global |
|
| 67 |
|
|
| 68 |
no_interrupts++; |
|
| 68 | 69 |
} |
| 69 | 70 |
|
| 70 | 71 |
int (timer_get_conf)(uint8_t timer, uint8_t *st) {
|
| lab2/utils.c | ||
|---|---|---|
| 2 | 2 |
|
| 3 | 3 |
#include <stdint.h> |
| 4 | 4 |
|
| 5 |
/* Byte Masks */ |
|
| 6 |
#define LSB 0xFF /**< @brief mask to filter least significant byte */ |
|
| 7 |
|
|
| 5 | 8 |
int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
|
| 6 |
if (lsb == NULL) |
|
| 7 |
return 1; |
|
| 9 |
if (lsb == NULL) return 1; |
|
| 8 | 10 |
|
| 9 |
*lsb = val; |
|
| 11 |
*lsb = val & LSB;
|
|
| 10 | 12 |
return 0; |
| 11 | 13 |
} |
| 12 | 14 |
|
| 13 | 15 |
int(util_get_MSB)(uint16_t val, uint8_t *msb) {
|
| 14 |
if (msb == NULL) |
|
| 15 |
return 1; |
|
| 16 |
if (msb == NULL) return 1; |
|
| 16 | 17 |
*msb = val >> 8; |
| 17 | 18 |
return 0; |
| 18 | 19 |
} |
| 19 | 20 |
|
| 20 | 21 |
int (util_sys_inb)(int port, uint8_t *value) {
|
| 21 |
/* To be implemented by the students */ |
|
| 22 | 22 |
if(value == NULL) return 1; |
| 23 | 23 |
uint32_t n = 0; |
| 24 | 24 |
if(sys_inb(port, &n)) return 1; |
| 25 |
*value = n; |
|
| 25 |
*value = n & LSB;
|
|
| 26 | 26 |
return 0; |
| 27 | 27 |
} |
Also available in: Unified diff