The LEON 3 ELF Bareboard Example ********************************** This tutorial shows how to build an interactive example and run it with **GNATemulator**. Compiling the example ===================== The example comprises 3 small ada units: * hello.adb, the main subprogram. * uart.ads and uart.adb which perform I/O using the UART. To build, simply invoke gprbuild in the example directory:: gprbuild --target=leon3-elf --RTS=ravenscar-sfp-leon3 the option '--RTS=ravenscar-sfp-leon3' selects the small foot print ravenscar profile. Running the example =================== To launch the example just run:: leon3-elf-gnatemu hello **GNATemulator** will automatically load the ELF file (:file:`hello`) and start execution at the entry point. Here is a quick run scenario:: Menu: 1) Hello 2) Bye 3) Quit You choice: 1 hello Menu: 1) Hello 2) Bye 3) Quit You choice: 2 bye Menu: 1) Hello 2) Bye 3) Quit You choice: 3 qemu: fatal: Trap 0x80 while interrupts disabled, Error state (The double trap which is an error is used to stop the simulator). Redirecting the uart ==================== It is possible to redirect the UART to a TCP port:: leon3-elf-gnatemu --serial=tcp::1234,server hello This will redirect UART1 to the TCP port 1234 of localhost. With the 'server' option, **GNATemulator** will wait for the TCP connection.