userApp
gnitnaw opened this issue · comments
- If I use UART4 to connect, then the screen will print lots of " � ", is it correct?
Thanks.
I think the answer is NO.
Could you give me the info about your board and the setting in the user/apps/build.mk?
Because if you are using STM32F429, and building with LCD apps, you may hang by this process, and got the junk info like you got.
I didn't change the code (with stm32f429 discovery). All are the same (git pull yesterday).
I connect to USART4: PC11 (TX), PC10 (RX)
Here is the message after I push reset button:
====================================================
Copyright(C) 2013-2014 The F9 Microkernel Project
Git head: d466fe1
Host: x86_64
Build:������������������������������������������������������������������������������������������������������������������������������������������������....(the same)
About LCD apps, I can see the rectangle on the LCD.
You still need to check user/apps/build.mk, my setting is like this
# Copyright (c) 2013 The F9 Microkernel Project. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
user-apps-dirs = \
l4test \
If you use default setting, it may contain other apps.
And if I remember correctly, UART output will use async output, so your kernel may occure some problem after __l4_printf(banner) when init with INIT_LEVEL_KERNEL_EARLY hook at start.c.
Maybe you can use gdb to trace it.
After I remove the ping-pong in user/apps/build.mk, it becomes:
====================================================
Copyright(C) 2013-2014 The F9 Microkernel Project
Git head: d466fe1�������������������������������������������������������������������������������������������������������������������������������
So how to solve this problem?
I have tried 115200, 76800, 38400, 19200, and 9600.
Only 115200 can let me see the banner...
I did "make config" and select STM32F429 in the platform and save, that's all.
CONFIG_BOARD_STM32F429DISCOVERY=y
CONFIG_BOARD_STM32P103 is not set
CONFIG_BITMAP_BITBAND is not set
CONFIG_FPU is not set
CONFIG_STDIO_NODEV is not set
CONFIG_STDIO_USE_DBGPORT=y
CONFIG_DBGPORT_USE_USART1 is not set
CONFIG_DBGPORT_USE_USART2 is not set
CONFIG_DBGPORT_USE_USART4=y
Limitations
CONFIG_MAX_THREADS=32
CONFIG_MAX_KT_EVENTS=64
CONFIG_MAX_ASYNC_EVENTS=32
CONFIG_MAX_ADRESS_SPACES=16
CONFIG_MAX_FPAGES=256
Kernel Timer
CONFIG_KTIMER_TICKLESS=y
CONFIG_KTIMER_TICKLESS_VERIFY is not set
CONFIG_KTIMER_TICKLESS_COMPENSATION=0
CONFIG_KTIMER_TICKLESS_INT_COMPENSATION=0
CONFIG_KTIMER_HEARTBEAT=65536
CONFIG_KTIMER_MINTICKS=128
Flexible page tweaks
CONFIG_LARGEST_FPAGE_SHIFT=16
CONFIG_SMALLEST_FPAGE_SHIFT=8
Thread tweaks
CONFIG_INTR_THREAD_MAX=256
KIP tweaks
CONFIG_KIP_EXTRA_SIZE=128
Kernel hacking
CONFIG_DEBUG=y
CONFIG_DEBUG_DEV_UART=y
CONFIG_KDB=y
CONFIG_KPROBES=y
CONFIG_SYMMAP=y
CONFIG_PANIC_DUMP_STACK=y
CONFIG_LOADER is not set
Test Case
No, I simply follow your instruction:
sudo screen /dev/ttyUSB0 115200 8n1
That's weird. Using your setting with master (d466fe1) branch, I can get the output:
====================================================
Copyright(C) 2013-2014 The F9 icrokernel Project
====================================================
Git head: d466fe1dcf8c0b230a6e7397ba4402bf5812bd37
Host: x86_64
Build: 2017-03-07T18:32:35+0800
Press '?' to print KDB menu
L4/Pistachio test suite starts
Simple IPC test (inter-as, only untyped words)
Send Message transfer: OK
ReplyWait Message transfer: OK
Returned Id 0 != 0 (local) [0 (global)]
From parameter (local): FAILED
Kernel panic: Hard fault. Restarting
-------KTABLES------If I use UART2 (change setting in .config , and connect to PD5/PD6) instead of UART4, I get:
====================================================
Copyright(C) 2013-2014 The F9 Microkernel Project
Git head: d466fe1
Host: x86_64
tt y sma2d o)0
KDB
Here is the message with USART1:
====================================================
Copyright(C) 2013-2014 The F9 Microkernel Project
Git head: d466fe1
Host: x86_64
Build: 2017-03-07T12:08:07+0100
Press '?' to print KDB menu
L4/Pistachio test suite starts
Simple IPC test (inter-as, only untyped words)
Send Message transfer: OK
ReplyWait Message transfer: OK
Returned Id 0 != 0 (local) [0 (global)]
From parameter (local): FAILED
lcd main
@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 at this moment, please pay attention 「示範專案：USART 測試程式」, which is a part of the document.
If it doesn't work, I suggest you change your USB TTL Cable.
For me USART1 works... USART2/4 doesn't work.
Are you also using the LEDs? The LEDs and the USART4 (PA0 and PA1) are using the same GPIO pins. Take a look at my ping-pong and other apps on my fork to see working variations of user/apps.