gapry
gapry
Can it work now?
The following references can help you. 1. [user_runtime.h](https://github.com/f9micro/f9-kernel/blob/3f733494082c329d00e6824b609c5b62de032694/user/include/user_runtime.h) 2. [F9-Kernel Note](https://hackpad.com/F9-Kernel-Note-UnUXDVd9Zv2) 3. [f9-kernel](http://wiki.csie.ncku.edu.tw/embedded/f9-kernel) 4. [lcd_test/main.c](https://github.com/f9micro/f9-kernel/blob/master/user/apps/lcd_test/main.c) 5. [gpioer/main.c](https://github.com/gapry/f9-kernel/blob/gpiocliser/user/apps/gpioer/main.c)
BTW, if you want to know more about microkernel, you can search the following links. 1. [cs9242(highly recommend)](https://www.cse.unsw.edu.au/~cs9242/16/lectures/) 2. [seL4 Home Page](https://sel4.systems/) 3. [microkernel List](http://www.microkernel.info/) 4. [Video List](https://www.google.com.tw/search?q=microkernel&client=firefox-b&biw=1920&bih=890&tbm=vid&ei=vBi_WI-UCcun8AWr3rrwDQ&start=0&sa=N&dpr=1)
UTCB is better. If your final goal is that F9 can provide GPIO and I2C driver, I think you need to implement the following user apps. 1. GPIO and I2C...
What is your current baud rate? 115200 or 9600 gnitnaw 於 2017年3月7日 週二，下午6:16寫道： > After I remove the ping-pong in user/apps/build.mk, it becomes: > ==================================================== > Copyright(C) 2013-2014 The F9...
I assume you use minicom to see the output of UART. So, do you have turned off (or turned on) software flow control and hardware flow control ? gnitnaw 於...
@gnitnaw For now, I know you have tried USART1, UART2 and UART4 but it doesn't work normally. Hence, I suggest you to read the document [STM32F420 Note](https://stm32f429.hackpad.com/NOTE-WbiooOfkaoR) at this moment,...
@jserv The profile result: 1. unalignment  2. alignment 
@jserv The implementation is the branch. https://github.com/gapry/f9-kernel/blob/benchmark_memcpy/benchmark/benchmark.c My approach is that measure the case, alignment and unalignment, five times and take the avg time. Assume my approach is correct, the...
@jserv What does plain byte-oriented mean ?