HC595Helper.h File Reference

Utility for mapping matrix nodes to 74HC595 shift-register output bits. More...

#include <stdint.h>

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Namespaces
namespace	HC595Helper
	Utilities for 74HC595 daisy-chain index computation.

Functions
uint16_t	HC595Helper::rowMajorIndex (uint8_t row, uint8_t col, uint8_t cols)
	Compute the row-major bit index for node (row, col).

Detailed Description

Utility for mapping matrix nodes to 74HC595 shift-register output bits.

Because the driver MapFn signature is a plain function pointer (no closure), column count must be captured as a compile-time constant in the mapper:

static const uint8_t COLS = 4;
static uint16_t myMapper(uint8_t r, uint8_t c) {
    return HC595Helper::rowMajorIndex(r, c, COLS);
}