Serial Buses

Modules
	I2C Bus
	Serial Port1
	Serial Port2
	UDP Buses
Files
file	buses.h
	Serial Buses.
file	buses.h
	Serial Buses.
file	busi2c.h
	Part of the Modtronix Configurable Buses. This modules uses buffers from the buses module for it's transmit and receive buffers.
file	busser1.h
	Interrupt driven Serial receive and transmit handler for USART1. Part of the Modtronix Configurable Buses. This modules uses buffers from the buses module for it's transmit and receive buffers.
file	busser2.h
	Interrupt driven Serial receive and transmit handler for USART2. Part of the Modtronix Configurable Buses. This modules uses buffers from the buses module for it's transmit and receive buffers.
file	busudp.h
	Part of the Modtronix Configurable Buses. This modules uses buffers from the buses module for it's transmit and receive buffers.

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Detailed Description

The Modtronix SBC65EC Web Server implements many different serial buses that can be linked together via the web based interface. For example, USART 1 (RS232 port) can be linked to a UDP port to implement a USART to UDP interface converters. The following buses are currently implemented:

• Serial 1 bus, is available via the 3 pin serial connector on the board. This bus is connected to USART1 of the PIC chip, and can be configured for RS-232 or 5V TTL voltage levels.
• Serial 2 bus, is available via the daughter board connector. This bus is connected to the USART of the PIC chip, and has 5V TTL voltage levels.
• UDP Port 1, has a default port address of 54124
• UDP Port 2, has a default port address of 54125
• One master I2C buses. This bus is configured for 400kbit/sec. It available via the red MicroMatch connector on the SBC65EC. It can only be used in Master Mode.
• One master SPI port. This is a software SPI port. It consists of 4 signals, SDO (Data Out), SDI (Data In), CLK (clock) and CS (chip Select). These 4 pins have 5V TTL levels, and can be configured via the web page.

Serial Buses have not been implemented yet! Will be implemented in a future version!

The Modtronix SBC65EC Web Server implements many different serial buses that can be linked together via the web based interface. For example, USART 1 (RS232 port) can be linked to a UDP port to implement a USART to UDP interface converters. The following buses are currently implemented:

• Two software SPI buses, SWSPI1 and SWSPI2
• One master I2C buses.
• Two USARTS, USART1 and USART2. They use the actual USART1 and 2 hardware peripherals of the CPU
• Two UDP ports
• One TCP port

By default, there are 8 buffers that can be used for the buses. Each bus can be configured to have a receive and/or transmit buffer. When configured to have a receive buffer, all received data will be stored to it. When configured to have a transmit buffer, all data contained in this buffer will be transmitted. The following buffers are defined:

• Buffer 0: 128 bytes
• Buffer 1: 128 bytes
• Buffer 2: 64 bytes
• Buffer 3: 64 bytes
• Buffer 4: 32 bytes
• Buffer 5: 32 bytes
• Buffer 6: 32 bytes
• Buffer 7: 32 bytes