IPC@CHIP Documentation - SC12 @CHIP-RTOS V1.10

AH
ES:DI
Must be 0x90.
Pointer to a HwApiFunctionStruct data structure which will be filled with vectors to @CHIP-RTOS
Hardware API Functions.
Return Value
Comments
AX= -1 if size parameter was too large. The size field of the structure will be set in this case to the
number of supported vectors.
AX= 0 on success
Note that the size member of the HwApiFunctionStruct serves as both an input and output
parameter. The caller must set this value to the number of vectors to be filled into the data structure by
this API call. In the event that this value exceeds the number of vectors available, the AX value returned
will be -1 and this API will set the size to 2, which is the number of vectors available by this API's current
implementation.
In any case, the resulting count in size indicates the number of vectors output to the caller's
HwApiFunctionStruct data structure at [ES:DI] by this API call.
typedef struct
{
int size; // number of function entries
unsigned (huge *readPios)(void);
void (huge *writePios)(unsigned);
} HwApiFunctionStruct;
// Example for usage:
int main()
{
HwApiFunctionStruct hwApi;
unsigned pios;
}
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[...]
hwApi.size = 2; // space for two functions in the struct
pfe_get_hwapi_func_ptr(&hwApi);
hwApi.writePios(0x55); // write something to the pios
pios = hwApi.readPios(); // read something from the pios
[...]
Interrupt 0xA1 service 0x10: HAL: Set int0 Vector
Parameters
Define the interrupt handler for the hardware interrupt 0
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