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

I2C Bus and SPI Interface - SC12 @CHIP-RTOS V1.10
IPC@CHIP Documentation Index I2C Bus / SPI API News
I2C Bus / SPI API
Here are the interface definitions for access to the IPC@CHIP's I2C bus and Software SPI.
Philips was the inventor of the Inter-IC or I²C-bus, and it is now firmly established as the worldwide de-facto
solution for embedded applications. It is used extensively in a variety of microcontroller-based professional,
consumer and telecommunications applications as a control, diagnostic and power management bus. As a twowire
serial bus, its inherently simple operation was crucial to its emergence as the worldwide de-facto standard.
SPI is a serial bus standard established by Motorola. The Serial Peripheral Interface (SPI) is a synchronous
serial interface useful for communicating with other peripheral or microcontroller devices. These peripheral
devices may be Serial EEPROMs, shift registers, display drivers, A/D converters, etc.
● I2C Bus / SPI API News
API Functions
The I2C Bus / SPI API provides interrupt 0xAA with a service number in the high order byte of the AX register
(AH). This interface provides access to the I2C Bus and Software SPI of the IPC@CHIP for application
programs.
● Interrupt_0xAA_function_0x80:_Initialize the I2C Bus
● Interrupt_0xAA_function_0x81:_Scan I2C Devices
● Interrupt_0xAA_function_0x82:_Transmit / Receive Character
● Interrupt_0xAA_function_0x83:_Transmit/ Receive Block
● Interrupt_0xAA_function_0x84:_Release I2C Bus
● Interrupt_0xAA_function_0x8b:_Restart the I2C Bus
● Interrupt_0xAA_function_0x8E:_Select I2C Clock Pin
● Interrupt_0xAA_function_0x8F:_Select I2C Data Pin
● Interrupt_0xAA_function_0x90:_SPI Init
● Interrupt_0xAA_function_0x95:_SPI Write Block
● Interrupt_0xAA_function_0x96:_SPI Read Block
● Interrupt_0xAA_function_0x97:_SPI Read and Write Block
Interrupt 0xAA service 0x80: Initialize the I2C Bus
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