Revision 4
All functions running, review code
| lab2/lab2.c | ||
|---|---|---|
| 4 | 4 |
#include <stdbool.h> |
| 5 | 5 |
#include <stdint.h> |
| 6 | 6 |
|
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extern unsigned int count; |
|
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|
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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) |
| ... | ... | |
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return 0; |
| 30 | 31 |
} |
| 31 | 32 |
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|
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int(timer_test_read_config)(uint8_t timer, enum timer_status_field field) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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return 1; |
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uint8_t st; |
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|
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if(timer<0|timer>2){ //tests for error in timer selection
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printf("Error selecting timer\n");
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return 1; |
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} |
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else if(timer_get_conf(timer, &st)==1){
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printf("Error getting configuration\n");
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return 1; |
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} |
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else if(timer_display_conf(timer, st, field)==1){
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printf("Error getting display configuration\n");
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return 1; |
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} |
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return 0; |
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} |
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int(timer_test_time_base)(uint8_t timer, uint32_t freq) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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return 1; |
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if(timer_set_frequency(timer, freq)==1){ //tests for error
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printf("Error testing time base\n");
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return 1; |
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} |
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return 0; |
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} |
| 45 | 61 |
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int(timer_test_int)(uint8_t time) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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int r, ipc_status; |
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uint8_t irq_set; |
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message msg; |
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return 1; |
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if(timer_subscribe_int(&irq_set)==1){
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printf("Error subscribing int\n");
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return 1; |
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} |
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while(count/60.0<time){ //looping until counter reaches the same value as time
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if ((r = driver_receive(ANY, &msg, &ipc_status))!=0){
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printf("driver_receive failed with: %d",r);
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continue; |
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} |
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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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if (msg.m_notify.interrupts &irq_set){ // subscribed interrupt
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timer_int_handler(); |
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if((count%60)==0){
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timer_print_elapsed_time(); //prints message each second; |
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} |
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} |
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break; |
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default: |
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break; //no other notifications expected: do nothing |
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} |
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} |
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else { //received a standard message, not a notification
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//no standard messages expected: do nothing |
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} |
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} |
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if(timer_unsubscribe_int()==1){
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printf("Error unsubscribing int\n");
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return 1; |
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} |
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return 0; |
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} |
| lab2/timer.c | ||
|---|---|---|
| 5 | 5 |
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#include "i8254.h" |
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unsigned int count=0; //Initializing counter |
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int hook_id = TIMER0_IRQ; |
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int (timer_set_frequency)(uint8_t timer, uint32_t freq) {
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/* To be implemented by the students */
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printf("%s is not yet implemented!\n", __func__);
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// freq=TIMER_FREQ/div, where TIMER_FREQ is the frequency of the clock and div os the value loaded nittially in the timer
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uint16_t div = (TIMER_FREQ /freq);
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return 1; |
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uint8_t msb, lsb; |
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util_get_LSB(div,&lsb); //getting LSB |
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util_get_MSB(div,&msb); //getting MSB |
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uint8_t st; |
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if(timer_get_conf(timer,&st)!=0){
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printf("Error getting conf in frequency set\n");
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return 1; |
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} |
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if(timer<0|timer>2){
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printf("Error selecting timer in frequency set\n");
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return 1; |
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} |
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else |
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{
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if(timer==0){
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st= ((st & 0x0F)|TIMER_LSB_MSB|TIMER_SEL0); //The mask 0x0f is used so that the 4 LSBs are not changed |
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sys_outb(TIMER_CTRL,st); //Sends control word to program the timer |
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sys_outb(TIMER_0,lsb); |
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sys_outb(TIMER_0,msb); //Both these functions program the timer |
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} |
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else if(timer==1){
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st= ((st & 0x0F)|TIMER_LSB_MSB|TIMER_SEL1); |
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sys_outb(TIMER_CTRL,st); |
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sys_outb(TIMER_1,lsb); |
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sys_outb(TIMER_1,msb); |
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} |
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else if(timer==2){
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st= ((st & 0x0F)|TIMER_LSB_MSB|TIMER_SEL2); |
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sys_outb(TIMER_CTRL,st); |
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sys_outb(TIMER_2,lsb); |
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sys_outb(TIMER_2,msb); |
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} |
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} |
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return 0; |
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} |
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int (timer_subscribe_int)(uint8_t *bit_no) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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return 1; |
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*bit_no = BIT(hook_id); |
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if(sys_irqsetpolicy(TIMER0_IRQ,IRQ_REENABLE,&hook_id)==1){ //operation to subscribe int
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printf("Error subscribing int\n");
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return 1; |
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} |
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return 0; |
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} |
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int (timer_unsubscribe_int)() {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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return 1; |
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if(sys_irqrmpolicy(&hook_id)==1){
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printf("Error unsubscribing int\n");
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return 1; |
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} |
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return 0; |
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} |
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void (timer_int_handler)() {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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count++; |
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} |
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int (timer_get_conf)(uint8_t timer, uint8_t *st) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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return 1; |
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uint8_t read_back = TIMER_RB_CMD | TIMER_RB_COUNT_ | TIMER_RB_SEL(timer); //forming the read-back command (TIMER_RB_CMD (bit 7 and 6) |
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//TIMER_RB_COUNT (BIT 5) and TIMER_RB_SEL (bit timer+1) |
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if (sys_outb(TIMER_CTRL, read_back)!=1) { //testing for an error
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switch (timer) {
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case 0: |
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if (util_sys_inb(TIMER_0, st)!=0) { //tests if TIMER_0 was chosen
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printf("Error selecting Timer 0\n");
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return 1; |
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} |
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break; |
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case 1: |
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if (util_sys_inb(TIMER_1, st)!=0) { //tests if TIMER_1 was chosen
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printf("Error selecting Timer 1\n");
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return 1; |
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} |
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break; |
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case 2: |
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if (util_sys_inb(TIMER_2, st)!=0) { //tests if TIMER_2 was chosen
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printf("Error selecting Timer 2\n");
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return 1; |
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} |
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break; |
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default: |
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printf("No clock selected\n"); //happens if timer<0 or timer>2
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return 1; |
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} |
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return 0; |
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} |
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printf("Error in get config\n");
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return 1; |
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} |
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int (timer_display_conf)(uint8_t timer, uint8_t st, |
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enum timer_status_field field) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
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int(timer_display_conf)(uint8_t timer, uint8_t st, enum timer_status_field field){
|
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return 1; |
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if(timer < 0 | timer > 2) //tests if the timer has a correct value |
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return 1; |
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|
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union timer_status_field_val config; //create union (needed for the function at the end) |
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uint8_t aux; |
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aux=st; |
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switch(field){
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case tsf_all: |
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config.byte=aux; |
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break; |
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case tsf_initial: //Checking init_mode (mask -> 0x30) |
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if((aux & 0x30)==TIMER_LSB){ //if 0x10
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config.in_mode=LSB_only; |
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} |
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else if ((aux & 0x30)==TIMER_MSB){ //if 0x20
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config.in_mode=MSB_only; |
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} |
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else if((aux & 0x30)==TIMER_LSB_MSB){ //if 0x30
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config.in_mode=MSB_after_LSB; |
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} |
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else{
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config.in_mode=INVAL_val; |
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printf("Invalid Initialization Mode\n");
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return 1; |
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} |
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break; |
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case tsf_mode: //Checking count_mode (mask -> 0x0E) |
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if((aux & 0x0E)==0){ //if 0x00
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config.count_mode=0; |
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} |
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else if((aux & 0x0E)==2){
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config.count_mode=1; |
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} |
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else if((aux & 0x0E)==4|(aux & 0x0E)==12){
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config.count_mode=2; |
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} |
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else if((aux & 0x0E)==6|(aux & 0x0E)==14){
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config.count_mode=3; |
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} |
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else if((aux & 0x0E)==8){
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config.count_mode=4; |
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} |
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else if((aux & 0x0E)==10){
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config.count_mode=5; |
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} |
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else{
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printf("Error in checking counting mode\n");
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return 1; |
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} |
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break; |
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case tsf_base: //Checking bcd (mask -> 0x01) |
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if((aux & 0x01)== TIMER_BCD){
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config.bcd = true; //if the last bit is 1, it's bcd |
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} |
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else if((aux & 0x01)==TIMER_BIN){
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config.bcd = false; //if the last bit is 0, it's binary |
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} |
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else{
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printf("Error in checking base\n");
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return 1; |
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} |
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break; |
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default: |
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return 1; |
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|
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} |
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|
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if(timer_print_config(timer, field, config)!=0){
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printf("Error printing\n");
|
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return 1; //function that prints the result |
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} |
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|
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|
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return 0; |
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|
|
| 47 | 187 |
} |
| lab2/utils.c | ||
|---|---|---|
| 3 | 3 |
#include <stdint.h> |
| 4 | 4 |
|
| 5 | 5 |
int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
|
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*lsb = (uint8_t) val; //truncation of 16 bit to 8 bit (maintains the LSB) |
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| 8 | 7 |
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return 1;
|
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return 0;
|
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} |
| 11 | 10 |
|
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int(util_get_MSB)(uint16_t val, uint8_t *msb) {
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/* To be implemented by the students */
|
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printf("%s is not yet implemented!\n", __func__);
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val= val>>8; //8 bit shift, gets rid of LSB
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*msb=(uint8_t)val; //truncation of 16 bit to 8 bit (this time we have the MSB)
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return 1;
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return 0;
|
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} |
| 18 | 17 |
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int (util_sys_inb)(int port, uint8_t *value) {
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/* To be implemented by the students */ |
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printf("%s is not yet implemented!\n", __func__);
|
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int (util_sys_inb)(int port, uint8_t *value) { //transform 8 bit into 32 bit
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| 22 | 19 |
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return 1; |
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uint32_t new_val; //initializing 32 bit variable |
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|
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if(sys_inb(port,&new_val)!=0){ //verifies if there is an error
|
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printf("Error in util_sys_inb\n");
|
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return 1; |
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} |
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*value=new_val & 0xFF; // dereferencing "value" |
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|
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return 0; |
|
| 24 | 29 |
} |
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