MSP430FR59941: Can CCS CIO console return input from user?

Evgeny Habinsky

Part Number: MSP430FR59941

I'd like to implement JTAG terminal. I have printf() messages in CCS CIO console but calling getchar() always return -1.

Can CIO console return input from user back to MCU or it is for STD output only?

over 1 year ago

0 Evan Lew over 1 year ago

TI__Genius 9970 points

Hi Evgeny Habinsky,

I don't believe this is possible, because I don't think stdin is defined by default. If you want to create an interactive terminal with the PC I would suggest using the back channel UART. This example will get you started:

https://dev.ti.com/tirex/explore/node?devices=MSP430FR59941&devtools=MSP430FR59941&node=AFJPJm7W0aTDbIfOv7V6RQ__IOGqZri__LATEST

Regards,

Evan

0 Chester Gillon over 1 year ago

Guru 92251 points

Evgeny Habinsky said:
I have printf() messages in CCS CIO console but calling getchar() always return -1.

Is your project using the TI or GCC compiler?

In CCS/MSP430F5529: Using scanf for user input in an embedded program found that with the GCC compiler runtime library functions to read stdin were a stub which returned -1. The example in that project had code to allow stdin to be used with the GCC compiler.

stdin should work with the TI compiler, but if getchar() always returns -1 try increasing the heap size.

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MSP430FR59941: Can CCS CIO console return input from user?