Nuts and Volts - September 2015

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USART Firmware

Let’s begin by setting up the USARTs. We only have to write this code once as the USART setup procedure is identical for both PICs. Our USART drivers will transmit on demand and receive via interrupt. The receive interrupt mechanism is assisted by a ring buffer. Each USART we activate will be attached to its own ring buffer. A ring buffer identical to their PIC32MX575F512H counterparts. This design also includes a 32.768 kHz crystal to drive the

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