There can be a race condition that the sem has alread been detached
after we did the cleanup. Besides, there is a RT_IPC_CMD_RESET command
in rt_sem_control which is more clear in setting the sem values.
1. rt_console_get_device should be call to set shell device only when it is null, or it will make finsh_set_device useless.
2. RT_USING_CONSOLE can be disabled in bsp/rtconfig.h
As the svc stack is the stack of threads, there is no need to allocate a
separate stack for the startup. Reuse the IRQ stack should be OK.
Tested on rm48 board.
1. fix heap management for stm32f0xx(SRAM=8k)
2. add USART1, USART2 driver for stm32f051R8
3. fix finsh support for stm32f0x
4. fix board components initial for stm32f0x and open debug msg
5. add led driver(pc9) and test thread for stm32f0discovery board
6. add init thread for stm32f0x do components initial
7. add rcc initial for stm32f0x in rt_hw_board_init()
8. add print rcc freq information function
the console output example is:
SYSCLK_Frequency is 48000000HZ
PCLK_Frequency is 48000000HZ
HCLK_Frequency is 48000000HZ
CECCLK_Frequency is 32786HZ
ADCCLK_Frequency is 14000000HZ
USART1CLK_Frequency is 48000000HZ
I2C1CLK_Frequency is 8000000HZ
SystemCoreClock is 48000000HZ
initialize rti_start:0 done
\ | /
- RT - Thread Operating System
/ | \ 1.2.0 build Nov 15 2013
2006 - 2013 Copyright by rt-thread team
do components intialization.
initialize rti_board_end:0 done
initialize rt_hw_led_init:32768 done
initialize finsh_system_init:0 done
finsh>>
for 2013-02-20 aozima commmit "port for gcc", but the commit is
not tested,and the kernel is breakdown in context_gcc.S, the file
is a copy from cortex-m3,but not port for cortex-m0, so i complete
this port for aozima, test it in stm32f0discovery board ,
and it works fine.
This reverts commit 07bd09fc0fc256e5c53ad3c6157802fd94c9910c.
The validation of the context is done with in `rt_set_errno`. So it's
safe to call it here.
