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E_Blue
Joined: 13 Apr 2011
Posts: 417
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| Printf not working as expected [Solved] |
 Posted: Wed Sep 23, 2020 9:06 am |
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I'm trying to print in a string but I see no changes after printf
What I'm doing wrong?
| Code: |
char IndexBufferCmdMain;
#define BufferCmdMainSize 15
char BufferCmdMain[BufferCmdMainSize][12];
#define AlarmRxBufferSize 16
char AlarmRxBuffer[AlarmRxBufferSize];//128bits
unsigned int16 EventoCid;
#define Part 0x09
#define User 0x0A
printf(BufferCmdMain[IndexBufferCmdMain][0],"%4LX A%1X A%2X\r\n",EventoCid,AlarmRxBuffer[Part],AlarmRxBuffer[User]);
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Electric Blue
Last edited by E_Blue on Wed Sep 23, 2020 1:28 pm; edited 1 time in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Sep 23, 2020 9:15 am |
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| If you want to print to a buffer, you should use sprintf, not printf. |
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temtronic
Joined: 01 Jul 2010
Posts: 9221
Location: Greensville,Ontario
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| Posted: Wed Sep 23, 2020 9:24 am |
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You need to post a real small program that comments what is expected and shows us what IS printed.
If you're trying to fill 'BufferCmdMain[IndexBufferCmdMain][0]' with 'EventoCid,AlarmRxBuffer[Part],AlarmRxBuffer[User])' data then you need to use the SPRINTF() function.
I'm thinking that's what you want to do. Look for Sprintf() in the manual, there is a small example listed.
Jay |
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E_Blue
Joined: 13 Apr 2011
Posts: 417
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| Posted: Wed Sep 23, 2020 9:25 am |
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Changed
| Code: | | printf(BufferCmdMain[IndexBufferCmdMain][0],"%4LX A%1X A%2X\r\n",EventoCid,AlarmRxBuffer[Part],AlarmRxBuffer[User]); |
to
| Code: | | sprintf(BufferCmdMain[IndexBufferCmdMain][0],"%4LX A%1X A%2X\r\n",EventoCid,AlarmRxBuffer[Part],AlarmRxBuffer[User]); |
doesn't work
Changed to
| Code: | sprintf(BufferCmdMain[IndexBufferCmdMain],"%4LX A%1X A%2X\r\n",EventoCid,AlarmRxBuffer[Part],AlarmRxBuffer[User]);
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and worked ok.
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Electric Blue |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19499
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| Posted: Wed Sep 23, 2020 11:34 am |
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sprintf, needs to be given the address where it is to put the data.
BufferCmdMain[IndexBufferCmdMain][0]
Is not an address.
to put the data into BufferCmdMain, you would just use
BufferCmdMain. If you want to put it to an offset location in this
buffer, then you need to use &, and the index, so:
&BufferCmdMain[IndexBufferCmdMain][0] |
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