Revision 5
Code corrected
| timer.c | ||
|---|---|---|
| 9 | 9 |
int hook_id = TIMER0_IRQ; |
| 10 | 10 |
|
| 11 | 11 |
int (timer_set_frequency)(uint8_t timer, uint32_t freq) {
|
| 12 |
// freq=TIMER_FREQ/div, where TIMER_FREQ is the frequency of the clock and div os the value loaded nittially in the timer |
|
| 12 |
|
|
| 13 |
if(freq<19){
|
|
| 14 |
return 1; |
|
| 15 |
} |
|
| 16 |
|
|
| 17 |
//freq=TIMER_FREQ/div, where TIMER_FREQ is the frequency of the clock and div os the value loaded nittially in the timer |
|
| 13 | 18 |
uint16_t div = (TIMER_FREQ /freq); |
| 14 | 19 |
|
| 15 | 20 |
uint8_t msb, lsb; |
| ... | ... | |
| 19 | 24 |
|
| 20 | 25 |
uint8_t st; |
| 21 | 26 |
|
| 22 |
if(timer_get_conf(timer,&st)!=0){
|
|
| 27 |
if(timer_get_conf(timer,&st)==1){
|
|
| 23 | 28 |
printf("Error getting conf in frequency set\n");
|
| 24 | 29 |
return 1; |
| 25 | 30 |
} |
| ... | ... | |
| 30 | 35 |
else |
| 31 | 36 |
{
|
| 32 | 37 |
if(timer==0){
|
| 33 |
st= ((st & 0x0F)|TIMER_LSB_MSB|TIMER_SEL0); //The mask 0x0f is used so that the 4 LSBs are not changed
|
|
| 38 |
st= ((st & 0x0F)|TIMER_LSB_MSB|TIMER_SEL0); //The mask 0x0F is used so that the 4 LSBs are not changed
|
|
| 34 | 39 |
sys_outb(TIMER_CTRL,st); //Sends control word to program the timer |
| 35 | 40 |
sys_outb(TIMER_0,lsb); |
| 36 | 41 |
sys_outb(TIMER_0,msb); //Both these functions program the timer |
| ... | ... | |
| 74 | 79 |
|
| 75 | 80 |
int (timer_get_conf)(uint8_t timer, uint8_t *st) {
|
| 76 | 81 |
|
| 77 |
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)
|
|
| 82 |
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)
|
|
| 78 | 83 |
//TIMER_RB_COUNT (BIT 5) and TIMER_RB_SEL (bit timer+1) |
| 79 | 84 |
|
| 80 |
if (sys_outb(TIMER_CTRL, read_back)!=1) { //testing for an error
|
|
| 85 |
if (sys_outb(TIMER_CTRL, read_back)==0) { //testing for an error
|
|
| 81 | 86 |
switch (timer) {
|
| 82 | 87 |
case 0: |
| 83 |
if (util_sys_inb(TIMER_0, st)!=0) { //tests if TIMER_0 was chosen
|
|
| 88 |
if (util_sys_inb(TIMER_0, st)==1) { //tests if TIMER_0 was chosen
|
|
| 84 | 89 |
printf("Error selecting Timer 0\n");
|
| 85 | 90 |
return 1; |
| 86 | 91 |
} |
| 87 | 92 |
break; |
| 88 | 93 |
case 1: |
| 89 |
if (util_sys_inb(TIMER_1, st)!=0) { //tests if TIMER_1 was chosen
|
|
| 94 |
if (util_sys_inb(TIMER_1, st)==1) { //tests if TIMER_1 was chosen
|
|
| 90 | 95 |
printf("Error selecting Timer 1\n");
|
| 91 | 96 |
return 1; |
| 92 | 97 |
} |
| 93 | 98 |
break; |
| 94 | 99 |
case 2: |
| 95 |
if (util_sys_inb(TIMER_2, st)!=0) { //tests if TIMER_2 was chosen
|
|
| 100 |
if (util_sys_inb(TIMER_2, st)==1) { //tests if TIMER_2 was chosen
|
|
| 96 | 101 |
printf("Error selecting Timer 2\n");
|
| 97 | 102 |
return 1; |
| 98 | 103 |
} |
| ... | ... | |
| 103 | 108 |
} |
| 104 | 109 |
return 0; |
| 105 | 110 |
} |
| 111 |
|
|
| 106 | 112 |
printf("Error in get config\n");
|
| 107 | 113 |
return 1; |
| 108 | 114 |
} |
| 109 | 115 |
|
| 110 | 116 |
int(timer_display_conf)(uint8_t timer, uint8_t st, enum timer_status_field field){
|
| 111 | 117 |
|
| 112 |
if(timer < 0 | timer > 2) //tests if the timer has a correct value |
|
| 113 |
return 1; |
|
| 118 |
if(timer<0|timer>2){ //tests for error in timer selection
|
|
| 119 |
printf("Error selecting timer\n");
|
|
| 120 |
return 1; |
|
| 121 |
} |
|
| 114 | 122 |
|
| 115 | 123 |
union timer_status_field_val config; //create union (needed for the function at the end) |
| 116 | 124 |
uint8_t aux; |
| 117 | 125 |
aux=st; |
| 126 |
|
|
| 118 | 127 |
switch(field){
|
| 119 | 128 |
case tsf_all: |
| 120 | 129 |
config.byte=aux; |
| 121 | 130 |
break; |
| 131 |
|
|
| 122 | 132 |
case tsf_initial: //Checking init_mode (mask -> 0x30) |
| 123 | 133 |
if((aux & 0x30)==TIMER_LSB){ //if 0x10
|
| 124 | 134 |
config.in_mode=LSB_only; |
| ... | ... | |
| 135 | 145 |
return 1; |
| 136 | 146 |
} |
| 137 | 147 |
break; |
| 148 |
|
|
| 138 | 149 |
case tsf_mode: //Checking count_mode (mask -> 0x0E) |
| 139 | 150 |
if((aux & 0x0E)==0){ //if 0x00
|
| 140 | 151 |
config.count_mode=0; |
| 141 | 152 |
} |
| 142 |
else if((aux & 0x0E)==2){
|
|
| 153 |
else if((aux & 0x0E)==2){ //if 0x02
|
|
| 143 | 154 |
config.count_mode=1; |
| 144 | 155 |
} |
| 145 |
else if((aux & 0x0E)==4|(aux & 0x0E)==12){
|
|
| 156 |
else if((aux & 0x0E)==4|(aux & 0x0E)==12){ //if 0x04 or 0x0C
|
|
| 146 | 157 |
config.count_mode=2; |
| 147 | 158 |
} |
| 148 |
else if((aux & 0x0E)==6|(aux & 0x0E)==14){
|
|
| 159 |
else if((aux & 0x0E)==6|(aux & 0x0E)==14){ //if 0x06 or 0x0E
|
|
| 149 | 160 |
config.count_mode=3; |
| 150 | 161 |
} |
| 151 |
else if((aux & 0x0E)==8){
|
|
| 162 |
else if((aux & 0x0E)==8){ //if 0x08
|
|
| 152 | 163 |
config.count_mode=4; |
| 153 | 164 |
} |
| 154 |
else if((aux & 0x0E)==10){
|
|
| 165 |
else if((aux & 0x0E)==10){ //if 0x0A
|
|
| 155 | 166 |
config.count_mode=5; |
| 156 | 167 |
} |
| 157 | 168 |
else{
|
| ... | ... | |
| 159 | 170 |
return 1; |
| 160 | 171 |
} |
| 161 | 172 |
break; |
| 173 |
|
|
| 162 | 174 |
case tsf_base: //Checking bcd (mask -> 0x01) |
| 163 | 175 |
if((aux & 0x01)== TIMER_BCD){
|
| 164 |
config.bcd = true; //if the last bit is 1, it's bcd |
|
| 176 |
config.bcd = true; //if the last bit is 1, it's bcd
|
|
| 165 | 177 |
} |
| 166 | 178 |
else if((aux & 0x01)==TIMER_BIN){
|
| 167 | 179 |
config.bcd = false; //if the last bit is 0, it's binary |
| ... | ... | |
| 171 | 183 |
return 1; |
| 172 | 184 |
} |
| 173 | 185 |
break; |
| 186 |
|
|
| 174 | 187 |
default: |
| 175 | 188 |
return 1; |
| 176 | 189 |
|
| 177 | 190 |
} |
| 178 | 191 |
|
| 179 |
if(timer_print_config(timer, field, config)!=0){
|
|
| 192 |
if(timer_print_config(timer, field, config)==1){ //function that prints the result
|
|
| 180 | 193 |
printf("Error printing\n");
|
| 181 |
return 1; //function that prints the result
|
|
| 194 |
return 1;
|
|
| 182 | 195 |
} |
| 183 |
|
|
| 184 | 196 |
|
| 185 | 197 |
return 0; |
| 186 |
|
|
| 187 | 198 |
} |
Also available in: Unified diff