Hello,
I have FRDM-K64F, KDS 3.2 and SDK 2.0 for K64F CPU family.
When I startet to use SDK 2.0 I found two problem with PRINTF. One less serious is definition of its first parameters "char *", which should be nowadays "const char *". It generates enormous number of warnings.
The second more serious problem is bug of float numbers output. Below is my main():
int main(void) {
/* Init board hardware. */
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();
float x = 0.9;
printf( "%f %f %f\n", x, x - 1.0, -3.14 );
PRINTF( "%f %f %f\n", x, x - 1.0, -3.14 );
/* Add your code here */
for(;;) { /* Infinite loop to avoid leaving the main function */
__asm("NOP"); /* something to use as a breakpoint stop while looping */
}
}
The output is:
0.900000 -0.100000 -3.140000
0.900000 -1.100000 -4.140000
The problem is in function DbgConsole_ConvertFloatRadixNumToString where some programmer badly implements condition:
if (fa <= pow(-10, precision_width))
{
intpart--;
}
The sign minus must be in front of pow.
reg.
