HAL_VideoIICOp (changes)
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Hardware Abstraction Layer
HAL entry points from RISC OS
ยป HAL_VideoIICOp
HAL_VideoIICOp
(HAL entry #112) #120)
int HAL_VideoIICOp(uint32_t location, const uint8_t *block, uint32_t *size)
| Entry | |
|---|---|
| location | Location to read from: |
| b0-15 offset/address within addressed device | |
| b16-23 I2C device address (7 bits + RnW bit) | |
| block | Memory block to transfer data to/from |
| size | Pointer to number of bytes to transfer |
| Exit | |
|---|---|
| - | Return code |
| size | is updated to reflect the number of bytes actually transferred |
Use
This is an internal call for OS use only and should not be used by user software. User software should use GraphicsV instead of interacting with the HAL directly.
This call allows the HAL to implement the functionality of GraphicsV 14.
See also
Information sources: Kernel.s.vdu.vdugrafv, Video.HWSupport.NVidia.s.Driver in CVS
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