Revision 17
replaced hardcoded value by MACRO
| 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_2ALT 0x6 /**< @brief Alternative notation for mode 2 */ |
|
| 48 |
#define TIMER_MODE_3ALT 0x7 /**< @brief Alternative notation for mode 3 */ |
|
| 47 | 49 |
#define TIMER_MODE_RED2 0x03 /**< @brief Reduce 3-bit mode to 2-bit mode */ |
| 48 | 50 |
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| 51 |
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|
| 49 | 52 |
/* Counting mode: bit 0 */ |
| 50 | 53 |
|
| 51 | 54 |
#define TIMER_BCD 0x01 /**< @brief Count in BCD */ |
| lab2/timer.c | ||
|---|---|---|
| 100 | 100 |
break; |
| 101 | 101 |
case tsf_mode: |
| 102 | 102 |
conf.count_mode = (st & TIMER_MODE_MASK)>>TIMER_MODE_POS; |
| 103 |
if(conf.count_mode == 0x6 || conf.count_mode == 0x7)
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|
| 103 |
if(conf.count_mode == TIMER_MODE_2ALT || conf.count_mode == TIMER_MODE_3ALT)
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|
| 104 | 104 |
conf.count_mode &= TIMER_MODE_RED2; |
| 105 | 105 |
break; |
| 106 | 106 |
case tsf_base: |
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