Problem
1. Write a C function to set up the acceptance filters and maslzs to receive messages with extended identifiers starting with "TO", "PO", or "HO" in mode 0.
2. Write a C function to prepare data to be sent via the first available transmit buffer in mode 0. The identifier to be used is the string "H2", and the value to be send is 0x1001030121320003. One should prepare the identifier and data in a buffer, look for an available transmit buffer, copy data from the buffer to the transmit buffer, and enable the transmission.