![]() The value for the top of the counter is calculated as shown in the image above. So how do we implement sending a bit every 1/9600 seconds? For this, we use the 16-bit timer (Timer1) of the Attiny84 in CTC mode. (In the above, the 2 idle bits at the end are not strictly necessary.) Start(low)-stop(high)-idle(high)-idle(high) The data format for a packet for the 9600 baud 8-N-1 serial connection is as follows: The value is sent one bit at a time, starting with the least significant bit (LSB), every 1/9600 seconds, thus giving us a baud rate of 9600. The above image shows the transmission of a byte (with value 0x95). So, now that we have some idea about serial communications, let's talk about implementing a transmit only (TX) for the ATtiny84. ![]() But what about the tinyAVRs? As continuation of my last post on setting up the ATtiny84 for programming, this time, I will talk about sending data from an ATtiny84 to a computer using serial communications.įirst, I recommend that you watch this fun and informative video on serial communications by Pete from Sparkfun, USA: But that chip has USART - hardware support for serial communications. In a previous post, I talked about serial communications with an ATmega168.
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