Revision 16
fixed stuff
| lab2/i8254.h | ||
|---|---|---|
| 44 | 44 |
#define TIMER_RATE_GEN BIT(2) /**< @brief Mode 2: rate generator */ |
| 45 | 45 |
#define TIMER_MODE_MASK 0x0E /**< @brief Mask for mode */ |
| 46 | 46 |
#define TIMER_MODE_POS 1 /**< @brief Position of smallest bit from mode */ |
| 47 |
#define TIMER_MODE_RED2 0x03 /**< @brief Reduce 3-bit mode to 2-bit mode */ |
|
| 47 | 48 |
|
| 48 | 49 |
/* Counting mode: bit 0 */ |
| 49 | 50 |
|
| lab2/timer.c | ||
|---|---|---|
| 84 | 84 |
int (timer_display_conf)(uint8_t timer, uint8_t st, enum timer_status_field field) {
|
| 85 | 85 |
union timer_status_field_val conf; |
| 86 | 86 |
uint8_t in_mode; |
| 87 |
if(field == tsf_initial){
|
|
| 88 |
in_mode = (st & TIMER_INMODE_MASK) >> TIMER_INMODE_POS; |
|
| 89 |
switch(in_mode){
|
|
| 90 |
case 0: conf.in_mode = INVAL_val ; break; //000 |
|
| 91 |
case 1: conf.in_mode = LSB_only ; break; //001 |
|
| 92 |
case 2: conf.in_mode = MSB_only ; break; //010 |
|
| 93 |
case 3: conf.in_mode = MSB_after_LSB; break; //011 |
|
| 94 |
default: return 1; break; |
|
| 95 |
} |
|
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if(timer_print_config(timer, field, conf)) return 1; |
|
| 87 |
switch(field){
|
|
| 88 |
case tsf_all: |
|
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conf.byte = st; |
|
| 90 |
break; |
|
| 91 |
case tsf_initial: |
|
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in_mode = (st & TIMER_INMODE_MASK) >> TIMER_INMODE_POS; |
|
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switch(in_mode){
|
|
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case 0: conf.in_mode = INVAL_val ; break; //000 |
|
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case 1: conf.in_mode = LSB_only ; break; //001 |
|
| 96 |
case 2: conf.in_mode = MSB_only ; break; //010 |
|
| 97 |
case 3: conf.in_mode = MSB_after_LSB; break; //011 |
|
| 98 |
default: return 1; break; |
|
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} |
|
| 100 |
break; |
|
| 101 |
case tsf_mode: |
|
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conf.count_mode = (st & TIMER_MODE_MASK)>>TIMER_MODE_POS; |
|
| 103 |
if(conf.count_mode == 0x6 || conf.count_mode == 0x7) |
|
| 104 |
conf.count_mode &= TIMER_MODE_RED2; |
|
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break; |
|
| 106 |
case tsf_base: |
|
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conf.bcd = st & TIMER_BCD; |
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break; |
|
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default: return 1; break; |
|
| 97 | 110 |
} |
| 98 |
if(field == tsf_mode){
|
|
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conf.count_mode = (st & TIMER_MODE_MASK)>>TIMER_MODE_POS; |
|
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if(timer_print_config(timer, field, conf)) return 1; |
|
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} |
|
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if(field == tsf_base){
|
|
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conf.bcd = st & TIMER_BCD; |
|
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if(timer_print_config(timer, field, conf)) return 1; |
|
| 105 |
} |
|
| 111 |
if(timer_print_config(timer, field, conf)) return 1; |
|
| 106 | 112 |
return 0; |
| 107 | 113 |
} |
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