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

AH
AL
0x8F
PIO pin number, [0..13]
Return Value
none
Comments
The default I2C data pin is PIO 1
To change the I2CDAT pin this function must be called before the I2C initialize function (0x80) is called.
Related Topics
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Index page
Initialize I2C Bus Function
Select I2C Clock Pin
Interrupt 0xAA service 0x90: SPI Init
Init the SPI Interface.
SPI specifies four signals: clock (SCLK); master data output, slave data input (MOSI); master data input,
slave data output (MISO); and slave select (CSS). The slave select signal pin is not specified with the SPI
init function and not activated with the SPI read and write functions. The user has to enable any other
PIO pin for that purpose and should serve this pin manually.
Parameters
AH
BX
CL
CH
DL
Must be 0x90
Mode, must be 0
Pio number for SPI Clock Pin (SCLK)
Pio number for SPI Input Pin (MISO)
Pio number for SPI Output Pin (MOSI)
Return Value
none
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