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I am using keil IDE for arm7 (LPC2138 by NXP) programming. Here is my code. >> #include <LPC213X.H> #include "Stdlib.h" #include "Serial.h" void initialize(void); int main () { float number; int i;
initialize(); UART0_sendstring("Here 1\r\n");
number = atof("643.783");
UART0_sendstring("Here 2\r\n");
while(1){} }
Program compiles successfully.Only 2 warnings: main_testProj2.c(51): warning: #550-D: variable "number" was set but never used main_testProj2.c(52): warning: #177-D: variable "i" was declared but never referenced
Now when i simulate the code on Hardware. Only "Here 1\r\n" string is displayed on HyperTerm. "Here2\r\n" is not Displayed at All. If i replace the argument string of atof() with something like this >> number = atof("6.3e+2"); then the program works fine. Both the strings are displayed in respective order.
What i concluded: In first case, The program enters into the atof function but it never comes back, looks like it hangs somewhere inside the atof() function. Why? Also i have found that similar problem occurs when i use sprintf function to convert float to string.
"any ideas??"
So, your summary of "atof() function problem" appear to be incorrect. It looks like the compiler, libraries and tools are good.
You need to check for (and take account of) whatever could be different between reasonably accurate simulation of uVision and your 'real world' hardware platform.