I´m going through some stange troubles while trying to drive the module with an AT32UC3C 32 bits MCU from ATMEL.
During the initialization I drive the reset line low, and then back up and finally after waiting for a second, I send the autobaud command. Unfortunately, I´m never able to properly read the first ACK.
After spending quite sometime with a digital scope I´ve noticed that after the hardware reset, the OLED TX line is just floating (high impedance). The line is not pulled up until the autobaud command has been read by the module This is means that the Micro is not able to read properly the ACK and a second autobaud has to be sent.
Is this behaviour correct, or do I have another problem somewhere else (and driving me nuts!)?
I´m using PmmC Rev 17. And I get the same behaviour no matter if the SD card is inserted or not.
Thanks in advance for your suggestions!
Eric
During the initialization I drive the reset line low, and then back up and finally after waiting for a second, I send the autobaud command. Unfortunately, I´m never able to properly read the first ACK.
After spending quite sometime with a digital scope I´ve noticed that after the hardware reset, the OLED TX line is just floating (high impedance). The line is not pulled up until the autobaud command has been read by the module This is means that the Micro is not able to read properly the ACK and a second autobaud has to be sent.
Is this behaviour correct, or do I have another problem somewhere else (and driving me nuts!)?
I´m using PmmC Rev 17. And I get the same behaviour no matter if the SD card is inserted or not.
Thanks in advance for your suggestions!
Eric
Comment