the use of char function in the 51822

Question

Hi,
I want to read the data by the radio.now I have read the temperate data from the tags by 51822. the data include the ID value and the temperate value. the ID is hex ,I must transfer them to char and output them by UART. Now，I have a confusion is that if the string function can't work in the keil. I use the function of strcat and sprintf and strcmy,but they can't work well. I want to know if the functions can be Compatible in the 51822 and keil.please give me an explanation,thank you!

ovrebekk · Accepted Answer

Hi Linda 
 The string functions should work fine, as long as you include string.h and stdio.h ( for sprintf() ) 
 What issues are you experiencing? 
 printf/scanf will not work out of the box, but it is fairly straight forward to construct strings using sprintf and send the resulting data to the UART. 
 Regards
Torbjørn