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rust-embedded / book

Documentation on how to use the Rust Programming Language to develop firmware for bare metal (microcontroller) devices
https://docs.rust-embedded.org/book/
Apache License 2.0
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No output following book STM32F303 #199

Closed leshow closed 5 years ago

leshow commented 5 years ago

I have been following the guide up to hardware.

When following through, I'm not able to get "Hello, world!" printed out using hprintln!. This is my output:

from openocd:

none separate
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : clock speed 950 kHz
Info : STLINK v2 JTAG v27 API v2 SWIM v15 VID 0x0483 PID 0x374B
Info : using stlink api v2
Info : Target voltage: 2.913064
Info : stm32f3x.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : accepting 'gdb' connection on tcp/3333
Info : device id = 0x10036422
Info : flash size = 256kbytes
undefined debug reason 7 - target needs reset
semihosting is enabled
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
adapter speed: 950 kHz
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x080015ca msp: 0x20010000, semihosting
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : Padding image section 0 with 10 bytes
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x2000003a msp: 0x20010000, semihosting
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
adapter speed: 950 kHz
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x080015ca msp: 0x20010000, semihosting
Info : halted: PC: 0x0800163a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a
Info : halted: PC: 0x0800184a

It just continues on that instruction over and over.

and from gdb:

Transfer rate: 12 KB/sec, 2403 bytes/write.
Note: automatically using hardware breakpoints for read-only addresses.
DefaultPreInit () at /home/leshow/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.9/src/lib.rs:564
564     pub unsafe extern "C" fn DefaultPreInit() {}
(gdb) break main
Note: breakpoint 4 also set at pc 0x8000480.
Breakpoint 5 at 0x8000480: file examples/hello.rs, line 13.
(gdb) continue
Continuing.

Breakpoint 2, HardFault_ (ef=0x0)
    at /home/leshow/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.9/src/lib.rs:548
548             atomic::compiler_fence(Ordering::SeqCst);
(gdb) next
^C
Program received signal SIGINT, Interrupt.
0x0800184a in HardFault_ (ef=0x0)
    at /home/leshow/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.9/src/lib.rs:548
548             atomic::compiler_fence(Ordering::SeqCst);

Also, my memory.x file had FLASH : ORIGIN = 0x00000000, LENGTH = 256K in it, but the book said 0x08000000 so I've changed it to that. I'm not sure if that's the correct value.

I have the stmf32f303 exactly the same board as described in the book. When I plugged it in before the board used to light up and I could press the 'user' button to cycle through the accelerometer and gyroscope. Now the board just has a red power indicator and the COM set to red all the time. I'm not sure if this is normal or because I actually ran something on the board the initial program it was loaded with is gone.

leshow commented 5 years ago

I started messing around with the f3 project trying to get the examples running, I was able to get the hello.rs in the examples and blinky.rs running with gdb on my board.

I noticed the memory.x files are different, so it's contents into my cortex-m-quickstart clone and voila. I was able to debug / run.

MEMORY
{
  CCRAM : ORIGIN = 0x10000000, LENGTH = 8K
  FLASH : ORIGIN = 0x08000000, LENGTH = 256K
  RAM : ORIGIN = 0x20000000, LENGTH = 40K
}

_stack_start = ORIGIN(CCRAM) + LENGTH(CCRAM)

These were the values that fixed it for me, I'll submit an issue to the quickstart

edit: I suppose quickstart is for cortex-m boards in general. Perhaps the book should be changed to have the right memory.x for the STM32F3DISCOVERY?

IamTheCarl commented 5 years ago

This just helped get me out of a rut. Thanks for this. Since the book states that its meant to be used with an STM32F3DISCOVERY, it really should assume you're using an STM32F3DISCOVERY.