CCS/TMS570LS1224: MODBUS-TCP communication by Hercules

Hello,

Since TMS570LS1224 doesn't have ethernet EMAC module, you can use other module (for example SPI, EMIF) for ethernet through an external standalone ethernet controller which supports SPI interface and EMIF interface.

The Venus-GX doesn't have SPI port, but it has a CAN port. I don't know if Venus-GX can convert CAN message to ethernet packet.

Hello,

SPI is a synchronous, full duplex master-slave-based interface. The data from the master or the slave is synchronized on the rising or falling clock edge. Both master and slave can transmit data at the same time, but only master generates the clock. The SPI interface can be:

1. 3-wire: SPICLK, SPISIMO (Master out, slave in), SPISOMI (Master in, slave out)

2. 4-wire: SPICLK, SPISIMO, SPISOMI, SPICS or SPIENA

3. 5-wire: SPICLK, SPISIMO, SPISOMI, SPICS AND SPIENA

TMS570 devices support Multi-buffered mode. Up to 128 buffers enable the transmission to be completed without CPU intervention. The buffers are combined in different transfer groups that can be triggered by external events (timers, I/O activity, etc) or by the internal tick counter. Each buffer of the MibSPI can be associated with different DMA channels in different TGs, allowing the user to move data between internal memory and an external slave with minimal CPU interaction.

Multi=pin parallel modes are also supported. The parallel mode enables the SPI module to send data over more than data line (2, 4, or 8) which increases the throughput. 

The maximum SPI clock speed is 25MHz.