diff options
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/2478')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/2478 | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/2478 b/gitlab/issues_text/target_missing/host_missing/accel_missing/2478 deleted file mode 100644 index 1b5690c2a..000000000 --- a/gitlab/issues_text/target_missing/host_missing/accel_missing/2478 +++ /dev/null @@ -1,18 +0,0 @@ -STM32F1 STM32VLDicovery board: incorrect clock register setting -Description of problem: -The execution of the program hangs when testing, from libopencm3 clock initialization, the status of the clock in ``rcc_wait_for_osc_ready()``. This function https://github.com/libopencm3/libopencm3/blob/master/lib/stm32/f1/rcc.c#L366 loops until the bit stating that the oscillator is stabilized is set. I am unable to find in qemu this bit being set upon clock initialization, which I believe is an hardware emulation shortcoming. Commenting this line in libopencm3 allows for the emulation to complete correctly, but I believe the error lies in the hardware emulation and not in the libopencm3 test. Reading the status of ``RCC_CR`` from ``gdb-multiarch`` probing the QEMU internal state returns 0, leading to the failure of the test at https://github.com/libopencm3/libopencm3/blob/master/lib/stm32/f1/rcc.c#L353 - -See https://www.st.com/resource/en/reference_manual/rm0008-stm32f101xx-stm32f102xx-stm32f103xx-stm32f105xx-and-stm32f107xx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf for the expected behavior of this register content on page 99/1136 -``` -7.3.1 Clock control register (RCC_CR) - -Bit 17 HSERDY: External high-speed clock ready flag -Set by hardware to indicate that the HSE oscillator is stable. This bit needs 6 cycles of the -HSE oscillator clock to fall down after HSEON reset. -0: HSE oscillator not ready -1: HSE oscillator ready -``` -Steps to reproduce: -1. git clone --recursive https://github.com/libopencm3/libopencm3-examples -2. make -3. qemu-system-arm -M stm32vldiscovery -nographic -serial mon:stdio -kernel examples/stm32/f1/stm32vl-discovery/usart/usart.elf |