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/* Table datastructure for storing calibrations in the EEPROM.
*
* A table has a fixed number of rows that define a key/value mapping.
* Keys and values are each U32.
* T: U32->U32
* Numbers are stored little-endian.
*
* Keys must be monotonically increasing.
*
* Device: PIC16F1459
* Compiler: XC8 v3.00
*
* Usage:
*
* #include <stdbool.h>
* #include <stdint.h>
* #include "types.h"
* #include "can.h"
* #include "eeprom.h"
* #include "table.h"
*/
enum {
TAB_KEY_SIZE = sizeof(U32),
TAB_VAL_SIZE = sizeof(U16),
TAB_ROWS = 32,
TAB_ROW_SIZE = TAB_KEY_SIZE + TAB_VAL_SIZE,
TAB_SIZE = TAB_ROWS * TAB_ROW_SIZE,
};
typedef struct {
EepromAddr offset; // starting address
} Table;
// Set the key and value of row k.
Status tabWrite(const Table *tab, U8 k, U32 key, U16 val);
// Read row k.
Status tabRead(const Table *tab, U8 k, U32 *key, U16 *val);
// Lookup the value associated with given key.
// If key falls between two rows, the value is interpolated
// from the two adjacent.
Status tabLookup(const Table *tab, Number key, U16 *val);
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