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Tool/software: Code Composer Studio
A customer has complained about the following trouble of CCSv7.
The used example is C2000Ware_1_00_01_00\device_support\f2833x\examples\fpu_hardware. I attached the project zip. Example_2833xFPU_hardware.zip
1) He remade its main() as bellow;
#include <math.h>
double z1;
z1 = sqrt(2.0);
z1 = pow(2.0, 1.5);
2) Get error messages while building in the console;
'Example_2833xFPU_hardware.out' failed
error: symbol "_sqrt" redefined: first defined in
"C:/ti/tirex-content/C2000Ware_1_00_01_00/libraries/math/FPUfastRTS/c28/lib/
He says no trouble with CCSv5.5 and wants to use rts2800_ fpu32_fast_supplement.lib to speed up his processing. Please, let us know aboutworkarounds of this trouble.
Best regards,
Kazuo Yamauchi
Hello Ki-Soo Lee,
Thanks for your support.
Regret to say, I couldn’t resolve this trouble by the way you suggested.
1. I wonder the two libraries, 1) and 2), can’t be used in combination.
z1= sqrt(2.0); …1) rts2800_ fpu32_fast_supplement.lib
z1=pow(2.0,1.5); ... 2) rst2800_fpu32.lib
2. error: symbol "_sqrt" redefined:
first defined in
"C:/ti/tirex-content/C2000Ware_1_00_01_00/libraries/math/FPUfastRTS/c28/lib/
rts2800_fpu32_fast_supplement.lib<sqrt_f32.obj>"; …1)
redefined in
"C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.5.LTS/lib/rts2800_fpu32.lib<e_sqrtf.obj>" …2)
3. Link Order;
4. The processing time of sqrt function in fpu32_fast_supplement.lib is faster than fpu32.lib as bellow. So the client wants to use fpu32_fast_supplement.lib. This optimize level is register.
Test code;
// Toggle GPIO34
GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1;
z1 = sqrt(2.0);
GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1;
{
volatile unsigned int cnt;
for ( cnt =5; cnt>0; cnt-- ) {}
}
Best regards,
Kazuo Yamauchi
