MSP430 transmit "hello world" with the timer interrupt

Karthikeyan Dhandapani

I'm using MSP430 launchpad and programming in embedded C. I'm in need to transmit "hello world" in UART. First i have to transmit. But in example programs the transmission interrupt is triggered by receiver interrupt.

If i have to transmit"hello world" at the start of the program how to trigger the TX interrupt?

over 12 years ago

0 Ilmars over 12 years ago

Guru 46710 points

Karthikeyan Dhandapani said:
TX interrupt

Most UART's does not have such thing as "TX interrupt". They have either "TX shift register empty" or "TX buffer empty" or both. You have to "push" UART by writing first byte into it's transmit register. After that it will signal when empty (previous byte sent) so you can write next byte into it.

To be honest, TI wrote example especially for you: msp430g2xx3_uscia0_uart_06_9600.c

You can find this example in "MSP430G2xx3 Code Examples"

0 Karthikeyan Dhandapani over 12 years ago in reply to Ilmars

Prodigy 220 points

In that example when character "u" is received, "hello world" is transmitted. How to transmit "hello world" without receiving anything?

0 eltury over 12 years ago in reply to Karthikeyan Dhandapani

Genius 3330 points

Use a pushbutton.

0 Ilmars over 12 years ago in reply to eltury

Guru 46710 points

eltury said:
Use a pushbutton.

Or timer.

0 Erkan Cankurt over 8 years ago

Prodigy 10 points

I tried to start in a timer interrupt. But it didn't work. is there any body can tell why i couldn't start in a timer interrupt?

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MSP430 transmit "hello world" with the timer interrupt