root / lab2 / timer.c @ 1
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| 1 | 1 | up20180614 | #include <lcom/lcf.h> |
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| 2 | #include <lcom/timer.h> |
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| 3 | |||
| 4 | #include <stdint.h> |
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| 5 | |||
| 6 | #include "i8254.h" |
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| 7 | |||
| 8 | uint32_t cont=0;
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| 9 | int hook_id;
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| 10 | |||
| 11 | |||
| 12 | int (timer_set_frequency)(uint8_t timer, uint32_t freq) {
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| 13 | /* To be implemented by the students */
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| 14 | uint8_t conf; |
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| 15 | timer_get_conf(timer,&conf); |
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| 16 | uint32_t tudo; |
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| 17 | uint8_t msb,lsb; |
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| 18 | tudo=(TIMER_FREQ/freq); |
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| 19 | msb=(tudo&0xFF00)>>8; |
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| 20 | lsb=tudo&0xFF;
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| 21 | //printf("%x\n%x\n%x\n%d\n",tudo,msb,lsb,timer);
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| 22 | |||
| 23 | |||
| 24 | if(timer==0) |
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| 25 | {
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| 26 | conf=(conf&0xF);
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| 27 | conf = (conf | TIMER_SEL0 | TIMER_LSB_MSB); |
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| 28 | if(sys_outb(TIMER_CTRL, conf)!=0) return 1; |
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| 29 | if(sys_outb(TIMER_0, lsb)!=0) return 1; |
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| 30 | if(sys_outb(TIMER_0, msb)!=0) return 1; |
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| 31 | } |
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| 32 | |||
| 33 | if(timer==1) |
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| 34 | {
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| 35 | conf=(conf&0xF);
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| 36 | conf = (conf | TIMER_SEL1 | TIMER_LSB_MSB); |
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| 37 | if(sys_outb(TIMER_CTRL, conf)!=0) return 1; |
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| 38 | if(sys_outb(TIMER_1, lsb)!=0) return 1; |
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| 39 | if(sys_outb(TIMER_1, msb)!=0) return 1; |
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| 40 | } |
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| 41 | |||
| 42 | if(timer==2) |
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| 43 | {
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| 44 | conf=(conf&0xF);
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| 45 | conf = (conf | TIMER_SEL2 | TIMER_LSB_MSB); |
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| 46 | if(sys_outb(TIMER_CTRL, conf)!=0) return 1; |
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| 47 | if(sys_outb(TIMER_2, lsb)!=0) return 1; |
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| 48 | if(sys_outb(TIMER_2, msb)!=0) return 1; |
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| 49 | } |
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| 50 | return 0; |
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| 51 | |||
| 52 | } |
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| 53 | |||
| 54 | int (timer_subscribe_int)(uint8_t *bit_no) {
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| 55 | /* To be implemented by the students */
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| 56 | //printf("%s is not yet implemented!\n", __func__);
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| 57 | /* int policy;
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| 58 | sys_irqrmpolicy(&policy); */
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| 59 | hook_id=*bit_no; |
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| 60 | sys_irqsetpolicy(IRQ_TIMER,IRQ_REENABLE,&hook_id); |
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| 61 | |||
| 62 | return 1; |
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| 63 | } |
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| 64 | |||
| 65 | int (timer_unsubscribe_int)() {
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| 66 | /* To be implemented by the students */
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| 67 | // printf("%s is not yet implemented!\n", __func__);
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| 68 | |||
| 69 | sys_irqrmpolicy(&hook_id); |
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| 70 | |||
| 71 | return 1; |
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| 72 | } |
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| 73 | |||
| 74 | void (timer_int_handler)() {
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| 75 | /* To be implemented by the students */
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| 76 | //printf("%s is not yet implemented!\n", __func__);
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| 77 | cont=cont+1;
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| 78 | } |
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| 79 | |||
| 80 | int (timer_get_conf)(uint8_t timer, uint8_t *st) {
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| 81 | /* To be implemented by the students */
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| 82 | |||
| 83 | uint8_t rbc = (TIMER_RB_CMD|TIMER_RB_SEL(4)|TIMER_RB_SEL(timer));
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| 84 | if(sys_outb(TIMER_CTRL,rbc)!=0) return 1; |
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| 85 | |||
| 86 | |||
| 87 | if(timer==0) |
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| 88 | return (util_sys_inb(TIMER_0,st));
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| 89 | if(timer==1) |
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| 90 | return (util_sys_inb(TIMER_1,st));
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| 91 | if(timer==2) |
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| 92 | return (util_sys_inb(TIMER_2,st));
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| 93 | |||
| 94 | return 1; |
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| 95 | |||
| 96 | //printf("%s is not yet implemented!\n", __func__);
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| 97 | |||
| 98 | |||
| 99 | } |
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| 100 | |||
| 101 | int (timer_display_conf)(uint8_t timer, uint8_t st,
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| 102 | enum timer_status_field field) {
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| 103 | /* To be implemented by the students */
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| 104 | union timer_status_field_val val;
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| 105 | |||
| 106 | |||
| 107 | if(field==tsf_all)
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| 108 | {
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| 109 | val.byte=st; |
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| 110 | |||
| 111 | } |
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| 112 | if(field==tsf_initial)
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| 113 | {
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| 114 | //printf("%d\n",tsf_initial);
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| 115 | |||
| 116 | if(((st&0x30)>>4)==0) |
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| 117 | val.in_mode=INVAL_val; |
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| 118 | |||
| 119 | if(((st&0x30)>>4)==1) |
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| 120 | val.in_mode=LSB_only; |
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| 121 | |||
| 122 | if(((st&0x30)>>4)==2) |
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| 123 | val.in_mode=MSB_only; |
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| 124 | |||
| 125 | if(((st&0x30)>>4)==3) |
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| 126 | val.in_mode=MSB_after_LSB; |
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| 127 | } |
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| 128 | |||
| 129 | |||
| 130 | if(field==tsf_mode)
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| 131 | {
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| 132 | //printf("%x\n",st);
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| 133 | val.count_mode=((st&0xE)>>1); |
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| 134 | |||
| 135 | /* printf("%x\n",val.count_mode);
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| 136 | val.count_mode=(val.count_mode>>1);
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| 137 | printf("%x\n",val.count_mode); */
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| 138 | //val.count_mode=(st&0x1C)/4;
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| 139 | |||
| 140 | if (val.count_mode==6) |
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| 141 | val.count_mode=2;
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| 142 | |||
| 143 | if (val.count_mode==7) |
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| 144 | val.count_mode=3;
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| 145 | |||
| 146 | |||
| 147 | } |
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| 148 | |||
| 149 | if(field==tsf_base ) //BCD |
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| 150 | {
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| 151 | //printf("%d\n",tsf_base);
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| 152 | if((st&0x1)==1) |
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| 153 | val.bcd=true;
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| 154 | |||
| 155 | else val.bcd=false; |
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| 156 | } |
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| 157 | |||
| 158 | |||
| 159 | return( timer_print_config(timer, field, val));
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| 160 | //printf("%s is not yet implemented!\n", __func__);
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| 161 | |||
| 162 | //return 0;
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| 163 | } |