ATXMEGA - XMEGA small program in C

Looking for a freelance that can write a small program for an ATXMEGA32A4U using the C language (Atmel Studio 7 + GCC Compiler [login to view URL]). Program tasks: a) configure pins: ======================== PB.3 = INPUT, internal pull-up ON PC.0 = INPUT, internal pull-up OFF PC.1 = OUTPUT, starts LOW PC.2 = SERIAL PORT IN: 1,5Mbps, 8N1 PC.3 = INPUT, internal pull-up ON PC.4 = OUTPUT, starts LOW PC.5 = INPUT, internal pull-up ON PC.6 = INPUT, internal pull-up ON PC.7 = OUTPUT, starts LOW Reference: * Ports, Pins, Pull-up: [login to view URL] * USART setup: [login to view URL] b) set the clock source: ======================== verify if pin PB.3 is HIGH then * configure the clock source as "Crystal" (8Mhz) and the PLL as 4x (resulting in 32Mhz to the CPU) * configure PC.4 as clock output (8Mhz) if PB.3 is LOW then * configure the clock source as "External clock, on XTAL 1 pin" (8Mhz) and the PLL as 4x (resulting in 32Mhz to the CPU) Reference: * AVR XMEGA Clock: [login to view URL] * Clock output: [login to view URL] Page 55, PORT C Alternate functions c) main task (in looping): ========================== c.1) Configure the DMA to store each byte received on a buffer, the buffer size must be 3072 bytes and start the DMA channel; c.2) Wait until PC.0 goes HIGH; (a simple WHILE here); c.3) Set PC.1 as LOW; c.4) Wait 20ms; c.5) Set PC.1 as HIGH; c.6) Goto "c.1". Reference: * XMEGA DMA: [login to view URL]