1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #![no_main] 16 #![no_std] 17 18 // Panic handler that halts the CPU on panic. 19 use panic_halt as _; 20 21 // Cortex M runtime entry macro. 22 use cortex_m_rt::entry; 23 24 // Semihosting support which is well supported for QEMU targets. 25 use cortex_m_semihosting::{debug, hprintln}; 26 27 #[entry] main() -> !28fn main() -> ! { 29 hprintln!("Hello, Pigweed!"); 30 debug::exit(debug::EXIT_SUCCESS); 31 loop {} 32 } 33