Firmware for 2 band DDS

Write a code as follows.

1. 2 bands 40mt and 20mt bands, frequency 7 MHZ to 7.3 MHZ. frequency 14 MHZ to 14.350 MHZ 40mt on LSB 20MT on USB
2. Use IF frequency of 10 MHZ.
3. Use si5351 as signal generator for generating the VFO frequency and BFO freq of 10MHZ
4. Use atmega 328 as processor
5. Use oled 0.9 Inch as display