RTOS/LAUNCHXL-F280049C: printf function issue when output uint16_t , int32_t, uint32_t variables.

Jae Yong Koh

Part Number: LAUNCHXL-F280049C
Other Parts Discussed in Thread: CONTROLSUITE, C2000WARE, SYSBIOS, TMS320F280049C

Tool/software: TI-RTOS

I'm evaluating F280049C with LAUNCHXL-F280049C for migrating customer board from F28075 to F280049C.

I need the management console with SCI so that I'm now testing printf function.

on F28075, I used UARTprintf function which is provided with utility library with controlSUITE.

But F280049C on C2000ware, no similar utility so I redirected STDOUT to SCI as below.

~~~

    status = add_device("scia", _SSA, SCI_open, SCI_close, SCI_read, SCI_write,
                        SCI_lseek, SCI_unlink, SCI_rename);
    fid = fopen("scia","w");
    freopen("scia:", "w", stdout);
    setvbuf(stdout, NULL, _IONBF, 0);

~~~

However, I found that printf not working properly when printing uint16_t , int32_t, uint32_t variables as below .

I'm using CCSv8.3 / C2000ware 1.0.6.00 & SYSBIOS 6.73.0.12 and attaching projects file which I'm testing.

Could you guide me how I can do that printf function works properly.

Best Regards,

JYtypical_TMS320F280049C.zip

over 6 years ago

0 MEGHANA MANAVAZHI over 6 years ago

TI__Genius 10215 points

hi ,

Some examples of using UART printf can be found below . This maybe for another device but the SCI on both devices is the same.

c2000ware\device_support\f2837xd\common\deprecated\utils

An example of usage can be found in the USB example below

c2000ware\device_support\f2837xd\examples\cpu1\usb_dev_serial

Some other links that might be useful:

http://e2e.ti.com/support/microcontrollers/c2000/f/171/t/723852
e2e.ti.com/.../601591

Regards.

0 Jae Yong Koh over 6 years ago in reply to MEGHANA MANAVAZHI

Intellectual 430 points

thanks a lot,
I'll try.

Regards,

0 MEGHANA MANAVAZHI over 6 years ago in reply to Jae Yong Koh

TI__Genius 10215 points

Hi,

Were you able to make any progress on this ?

Regards.

0 Jae Yong Koh over 6 years ago in reply to MEGHANA MANAVAZHI

Intellectual 430 points

Not yet.

I've been trying but not found the solution.

I don't understand why printf/sprintf not work properly for 32bit variable ?

I'm using rts2800_fpu32.lib.

Are there compiler or link options for printf/sprint ?

Best regards,

JY Koh

0 MEGHANA MANAVAZHI over 6 years ago in reply to Jae Yong Koh

TI__Genius 10215 points

I am not too familiar with this . Please check the compiler userguide
www.ti.com/.../spru514r.pdf

Regards.

0 EK over 6 years ago in reply to Jae Yong Koh

Expert 2520 points

Regarding 32bit printf. On your picture you have missing long format modifier. On 16bitters like C2000 int is 16bits wide and you need %ld instead of %d to print 32bits integer, %08lx instead of %08x.

Regards,
Edward

0 MEGHANA MANAVAZHI over 6 years ago in reply to EK

TI__Genius 10215 points

Hi Edward ,

Which picture are you referring to ? Does the above update of %ld instead of %d work for you ?

Regards.

0 EK over 6 years ago in reply to MEGHANA MANAVAZHI

Expert 2520 points

Hi,

I meant topic starter's attached screenshot. Please look at code in that picture. Missing 'l' in format string when printing long integers. Of course it can't work properly without 'l', no wonder topic starter gets 0000FFFF instead of FFFFFFFF and so on.

Edward

0 Jae Yong Koh over 6 years ago in reply to EK

Intellectual 430 points

Thanks Edward,

It's resolved.

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RTOS/LAUNCHXL-F280049C: printf function issue when output uint16_t , int32_t, uint32_t variables.