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HAL_IICReadLines
Hardware Abstraction Layer
HAL entry points from RISC OS
» HAL_IICReadLines
HAL_IICReadLines
(HAL entry #34)
__value_in_regs IICLines HAL_IICReadLines(int bus)
| Entry | |
|---|---|
| bus | Bus number to query |
| Exit | |
|---|---|
| a1-a2 | IICLines structure containing the current values read from the bus |
Use
This is an internal call for OS use only and should not be used by user software.
Reads the state of the IIC lines on the specified bus, without changing their state.
Note the “__value_in_regs” keyword, which signifies that the binary ABI expects SDA and SCL to be returned in registers a1 and a2.