From 776be79f7bb10b09e795e2ea93bb795a653c9b4c Mon Sep 17 00:00:00 2001 From: Ulf Lilleengen Date: Fri, 24 Jun 2022 19:56:15 +0200 Subject: Move bootloader main to examples This should remove some confusion around embassy-boot-* being a library vs. a binary. The binary is now an example bootloader instead. --- examples/boot/bootloader/stm32/src/main.rs | 46 ++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 examples/boot/bootloader/stm32/src/main.rs (limited to 'examples/boot/bootloader/stm32/src/main.rs') diff --git a/examples/boot/bootloader/stm32/src/main.rs b/examples/boot/bootloader/stm32/src/main.rs new file mode 100644 index 000000000..45c511ced --- /dev/null +++ b/examples/boot/bootloader/stm32/src/main.rs @@ -0,0 +1,46 @@ +#![no_std] +#![no_main] + +use cortex_m_rt::{entry, exception}; +#[cfg(feature = "defmt")] +use defmt_rtt as _; +use embassy_boot_stm32::*; +use embassy_stm32::flash::{Flash, ERASE_SIZE}; + +#[entry] +fn main() -> ! { + let p = embassy_stm32::init(Default::default()); + + // Uncomment this if you are debugging the bootloader with debugger/RTT attached, + // as it prevents a hard fault when accessing flash 'too early' after boot. + /* + for i in 0..10000000 { + cortex_m::asm::nop(); + } + */ + + let mut bl: BootLoader = BootLoader::default(); + let mut flash = Flash::unlock(p.FLASH); + let start = bl.prepare(&mut SingleFlashProvider::new(&mut flash)); + core::mem::drop(flash); + unsafe { bl.load(start) } +} + +#[no_mangle] +#[cfg_attr(target_os = "none", link_section = ".HardFault.user")] +unsafe extern "C" fn HardFault() { + cortex_m::peripheral::SCB::sys_reset(); +} + +#[exception] +unsafe fn DefaultHandler(_: i16) -> ! { + const SCB_ICSR: *const u32 = 0xE000_ED04 as *const u32; + let irqn = core::ptr::read_volatile(SCB_ICSR) as u8 as i16 - 16; + + panic!("DefaultHandler #{:?}", irqn); +} + +#[panic_handler] +fn panic(_info: &core::panic::PanicInfo) -> ! { + cortex_m::asm::udf(); +} -- cgit