topic Re: USB CDC Question in LPCXpresso IDE

USB CDC Question

lpcware — Wed, 15 Jun 2016 21:27:46 GMT

Content originally posted in LPCWare by ub3r on Tue Sep 18 05:27:04 MST 2012
Hi Guys,

Im playing with the USB CDC code, and its working well.
Im currently sending strings like this:

serBuf2 = "Welcome to my CDC Program";
USB_WriteEP (CDC_DEP_IN, (unsigned char *)&serBuf2[0], 32);

Output:

Welcome to my CDC Program

Now i want to add a variables to my string.. like this:

int temperature = 25;
serBuf2 = ([I]I dont know what to put here[/I]);
USB_WriteEP (CDC_DEP_IN, (unsigned char *)&serBuf2[0], 32);

Wanted Output:

Temperature today is: 25 degrees.

But i don't know how to do it.

cheers

Re: USB CDC Question

lpcware — Wed, 15 Jun 2016 21:27:47 GMT

Content originally posted in LPCWare by ub3r on Tue Sep 18 06:48:10 MST 2012
Ok answered my own question
Just used sprintf.. :rolleyes:

char data[32];
int var = 0;

sprintf (data, "Temperature: %d", var);
USB_WriteEP (CDC_DEP_IN, (unsigned char *)data, 32);

Re: USB CDC Question

lpcware — Wed, 15 Jun 2016 21:27:47 GMT

Content originally posted in LPCWare by ub3r on Tue Sep 18 06:59:25 MST 2012
:confused:

Why does my 'flash used' go from 5421kb -> 16547kb after sprintf????

Re: USB CDC Question

lpcware — Wed, 15 Jun 2016 21:27:48 GMT

Content originally posted in LPCWare by ex-kayoda on Tue Sep 18 07:04:22 MST 2012

Quote: ub3r
:confused:

Why does my 'flash used' go from 5421kb -> 16547kb after sprintf????

Because you use sprintf :confused::eek::confused:

Read: 'Reducing codesize of printf' http://support.code-red-tech.com/CodeRedWiki/UsingPrintf