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HAL_MatrixScan
Hardware Abstraction Layer
HAL entry points from RISC OS
ยป HAL_MatrixScan
HAL_MatrixScan
(HAL entry #54)
unsigned int HAL_MatrixScan(int column)
| Entry | |
|---|---|
| column | Column number to scan |
| Exit | |
|---|---|
| - | Returns bitfield describing active rows |
Use
This is an internal call for OS use only and should not be used by user software.
Returns a bitfield describing which rows are active on the specified column. Any timing issues, or the driving of the matrix between calls are left to the HAL.