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Diffstat (limited to 'cortex-m-rt/examples/state.rs')
-rw-r--r-- | cortex-m-rt/examples/state.rs | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/cortex-m-rt/examples/state.rs b/cortex-m-rt/examples/state.rs new file mode 100644 index 0000000..0b5eeeb --- /dev/null +++ b/cortex-m-rt/examples/state.rs @@ -0,0 +1,38 @@ +//! Preserving state across executions of an exception handler + +#![deny(unsafe_code)] +#![deny(warnings)] +#![no_main] +#![no_std] + +#[macro_use(entry, exception)] +extern crate cortex_m_rt as rt; +extern crate panic_semihosting; + +use rt::ExceptionFrame; + +// the program entry point +entry!(main); + +fn main() -> ! { + loop {} +} + +// exception handler with state +exception!(SysTick, sys_tick, state: u32 = 0); + +fn sys_tick(state: &mut u32) { + *state += 1; +} + +// the hard fault handler +exception!(HardFault, hard_fault); + +fn hard_fault(_ef: &ExceptionFrame) -> ! { + loop {} +} + +// the default exception handler +exception!(*, default_handler); + +fn default_handler(_irqn: i16) {} |