CCS/TMS570LC4357: interrupt based transmit and receive UART

DEEPAK KUMAR MISHRA

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN, TMS570LS1224, LAUNCHXL2-570LC43

Tool/software: Code Composer Studio

Dear sir,

I want interrupt based transmit and receive a frame through UART. First i want to receive a frame(interrupt based) and the i have to sent a frame(also interrupt based). i know i have to use scisend() and scireceive() in HL_notification.H file. but i am confused that once i receive a frame of 10 bytes then interrupt will be generated and i have to read the data. after that i have to sent a frame of 10 bytes how to write the logic for it?

kindly help

over 6 years ago

0 DEEPAK KUMAR MISHRA over 6 years ago

Intellectual 510 points

Sir,
i found ISR is there in sci.c but i am wondering from where it will get length value. As far as i know this value has to be passed in scireceive() and scisend() function.

where do i call scireceive() and scisend()??

thank you

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,

attached is project (HALCoGen and CCS) where data is received using interrupt. It is for TMS570LS1224, but could be used for reference. 6378.UART_TMS570LS1224_TX_RX.ZIP

Best regards,

Miro

0 DEEPAK KUMAR MISHRA over 6 years ago in reply to Miro

Intellectual 510 points

Sir,
But i am getting error "Lin1HighLevelInterrupt not defined". What may be the problem?

Regards,
Deepak

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,
Could you attach the project?

Best regards,
Miro

0 DEEPAK KUMAR MISHRA over 6 years ago in reply to Miro

Intellectual 510 points

Dear Sir,

I am attaching the project here. In the project i am continuously toggling the two LEDS(LAUNCHXL2-570LC43). I want to implement interrupt based receive UART and then transmit the received frame.

Kindly help. sciSend() is called in HL_notification.c. What I understood is once interrupt raised then execution will be transfered to lin1HighLevelInterrupt(), then ISR in scinotification() in HL_notification.c.

3542.uart_int_exmpl.rar

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,

In attached code, when button is pressed SCI1 sends 5 bytes. SCI1 is wired to SCI3. When SCI3 receives data, interrupt is generated.

The first call of sciReceive is for receive setup. Every time interrupt is generated, one byte is transferred. After all bytes are transferred then sciNotification is called to setup for new receive. sciReceive must not be called again until the transfer is complete, when the sciNotification callback willbe called.

1184.UART_TMS570LS3137_SCI1_SCI3.ZIP

You can modify code to send received data.

Best regards,

Miro

0 DEEPAK KUMAR MISHRA over 6 years ago in reply to Miro

Intellectual 510 points

Sir,

i am using CCSv7.3. I am unable to open the project you have attached. what may be the problem?

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,

There is a problem with zip.

Try again with this:

1273.UART_TMS570LC4357_SCI1_SCI3.zip

Best regards,

Miro

0 DEEPAK KUMAR MISHRA over 6 years ago in reply to Miro

Intellectual 510 points

Thank you sir! I have modified the code slightly but i am unable to receive data from computer serial port. I am attaching the modified code here

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,
To use _enable_IRQ_interrupt_() put #include "HL_sys_core.h" in HL_sys_main.c or replace it with _enable_IRQ() .

Best regards,
Miro

0 DEEPAK KUMAR MISHRA over 6 years ago in reply to Miro

Intellectual 510 points

sir,

still I am unable to receive frame of 5 bytes. from the code what I understood is once complete frame is received,interrupt is generated and execution will be transfered to scinotification(). but it is not happening in my case .

thank u

0 Miro over 6 years ago in reply to DEEPAK KUMAR MISHRA

TI__Mastermind 21425 points

Hello,
You should enable both SCI_RX and MCU interrupts.

Best regards,
Miro

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CCS/TMS570LC4357: interrupt based transmit and receive UART