CCS: TMS570LC43x: SCI RX interrupt doesn't work

Hello,

1. The SCI module has two interrupt lines, level 0 and level 1. Level 0 has higher priority, and is called High Level interrupt in HALCOGen driver.

2. Receive interrupts are enabled by the SET RX INT bit of SCISETINT register

3. If the SET RX INT is set, a receive interrupt is generated when the SCI transfers newly received data from SCIRXSHF to SCIRD.

If you use the driver generated through HALCOGen, you need to call sciReceive() first to set the length:

g_sciTransfer_t.rx_length = length;

Thanks for the reply. I have already tried calling sciReceive() with the following code:

But it doesn't work.

Putting a breakpoint inside sci4HighLevelInterrupt, the running never stops.

Also "command" is always empty even if I'm sending periodic serial data with Com Port Data Emulator. 

What I am missing?

Hello,

Two thing to check:

1. Pinmux settings for SCI4 signals which are multiplexed with N2HET and EMIFsignals

2. which interrupt line is used for SCI4 RX interrupt: high level or low level:  sciREG4->SETINTLVL 

Thanks for the reply. I solved the problem using sciREG1 but now there is another problem. 

I can use the function "sciSend" to communicate with the terminal:

- I used the function  "sciSend(sciREG1,1,(unsigned char *)"1"); to send the character "1"

- but every time I send the character I observe a weird character in the terminal like "à" or "£"

I set the baud rate to 9600 with HalcoGen and I made sure the terminal was also set to 9600.

Any suggestions?

Thanks in advance

It is most likely caused by the different baudrate or different stop bit.

I checked both but they match. 

Could it be a problem with HalcoGen? Because the graphics are very confusing

Or could it a be a vclk problem? I am attaching the function generated by Halcogen SciSetBaudRate

The code generated by HALCOGen should be fine.