SD CARD DONT DISPLAY DATA WHEN POWER IS ON

[imran mahmood]

dear all i am using atmega16 with sd card problem is when power is ON ,data from sd card dont display on the GLCD ,if atmega16 is manually reset by  push button then data is displayed.I’ve checked with BOD & BODLV fuses but nothing.sometimes it get data from sd card when power is ON but it becomes rare.

[Amrith]

Hi Imran,

Share your schematics, there could be some problem in your design. you need proprer power for SD card interface. How did you interface SD card to mega16???

If you interfaced SD card using SPI, you need ta add pull up on data lines.

[AJISH ALFRED]

Hi,

Please post your circuit schematic. Also make sure that your GLCD and related code is working properly, and the issue is only related to the communication with SDcard.

[imran mahmood]

thank u amirth problem is rectified u r right only pull up resistor were required

[Amrith]

You are most welcome imran.

Suggest you to post your project on engineers garage web site once you complete it.

[Author]

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