root / lab2 / utils.c @ 23
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#include <lcom/lcf.h> |
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#include <stdint.h> |
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/* Byte Masks */
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#define LSB 0xFF /**< @brief mask to filter least significant byte */ |
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int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
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if (lsb == NULL) return 1; |
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*lsb = val & LSB; |
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return 0; |
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} |
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int(util_get_MSB)(uint16_t val, uint8_t *msb) {
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if (msb == NULL) return 1; |
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*msb = val >> 8;
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return 0; |
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} |
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int (util_sys_inb)(int port, uint8_t *value) { |
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if(value == NULL) return 1; |
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uint32_t n = 0;
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if(sys_inb(port, &n)) return 1; |
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*value = n & LSB; |
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return 0; |
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} |