4欧就快1A了,你的电源能带动吗?还有,3036反馈脚和输出之间不光要接电阻分压,还要接个小电容,你接了吗?最后,输出电容的容量够吗?陶瓷电容的实际容量在加了电压以后是肯定低于标称容量的,低多少看个体。如果你用的电容和参考设计型号不同,哪怕参数相同,实际容量有可能相去甚远。这就是为什么很多高端设备都要在陶瓷电容附近并一个钽电容,因为钽电容CV曲线是平的。容量稳定了转换芯片的控制回路才能稳定。
谢谢你的的提点!我晚点会回去再试下新买的200s贴上去看看。
原理图是这样的:
原理图上的元件都贴了的。 焊了好多块板子(每个板子上都焊了100s芯片)EA3036都烧了,应该不会是所有的100s芯片都有问题吧。
我就驱动100s,对电容应该要求没那么高吧。现在主要是想把cup跑起来。
问题描述:
PCB板子是直接打的论坛开源的菠萝派( https://whycan.cn/t_2788.html )。
只焊EA3036芯片三路电压都输出正常,但是焊完F1C100S芯片后【三路电压均被拉低到零点几伏 或 EA3036直接烧掉】。
(EA3036是淘宝一家店买的。。10片牺牲7,8片了 ,是不是芯片问题? )
qt.qpa.plugin: Could not find the Qt platform plugin "eglfs" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: linuxfb, minimal, offscreen, vnc.
Process killed by signal
--------------------------------------------------------------------
--------------------------------------------------------------------
查看/usr/lib/qt/plugins/platforms 目录如下,是没有eglfs
# cd /usr/lib/qt/plugins/platforms
# ls
libqlinuxfb.so libqminimal.so libqoffscreen.so libqvnc.so
#
--------------------------------------------------------------------
--------------------------------------------------------------------
加 -platform linuxfb是可以运行的。
但是怎么才能默认使用linuxfb来运行程序呢?
PC远程调试运行是不能加 -platform linuxfb的,所以想请教下大家。
好像是犯了低级错误------ 现在可以了
WiFi名字后多了个空格。
root@ubuntu:/# wpa_supplicant -B -c /etc/wpa_supplicant.conf -i wlan0
Successfully initialized wpa_supplicant
root@ubuntu:/# [ 54.751545] RTL8723BS: rtw_set_802_11_connect(wlan0) fw_state
= 0x00000008
[ 54.984523] RTL8723BS: start auth
[ 54.990049] RTL8723BS: auth success, start assoc
[ 55.000233] RTL8723BS: rtw_cfg80211_indicate_connect(wlan0) BSS not found !!
[ 55.007440] RTL8723BS: assoc success
[ 55.026198] RTL8723BS: send eapol packet
[ 55.037239] RTL8723BS: send eapol packet
[ 55.041820] RTL8723BS: set pairwise key camid:4, addr:cc:08:fb:76:c1:66, kid:
0, type:AES
[ 55.053800] RTL8723BS: set group key camid:5, addr:cc:08:fb:76:c1:66, kid:1,
type:AES
root@ubuntu:/# udhcpc -i wlan0
udhcpc (v1.22.1) started
Sending discover...
Sending select for 192.168.1.103...
Lease of 192.168.1.103 obtained, lease time 7200
也或者是板子有问题: https://whycan.cn/t_2738.html#p22040
不会这么衰把。。刚买的 荔枝派zero
估计是密码配置不对, 导致wifi无事可做,睡觉去了: https://whycan.cn/t_1920.html#p12703
谢谢提醒,是用户名后多了空格。。。
调试环境:荔枝派zero
linux:zero-linux4.14-y
rootfs:debian9.9 Debian9.9制作
调试r8723BS连接wifi时出现如下错误。执行wpa_supplicant -B -c /etc/wpa_supplicant.conf -i wlan0后出现
[ 90.708558] RTL8723BS: nolinked power save leave
[ 92.916663] RTL8723BS: nolinked power save enter
[ 97.928597] RTL8723BS: nolinked power save leave
[ 100.136882] RTL8723BS: nolinked power save enter
[ 105.148540] RTL8723BS: nolinked power save leave
[ 107.346782] RTL8723BS: nolinked power save enter
Sending discover...
[ 112.348513] RTL8723BS: nolinked power save leave
[ 114.546821] RTL8723BS: nolinked power save enter
Sending discover.
本人操作步骤如下:
1、安装驱动
root@ubuntu:/# cd / ;insmod r8723bs.ko
[ 29.104243] r8723bs: module is from the staging directory, the quality is unk
nown, you have been warned.
[ 29.122015] RTL8723BS: module init start
[ 29.126115] RTL8723BS: rtl8723bs v4.3.5.5_12290.20140916_BTCOEX20140507-4E40
[ 29.133158] RTL8723BS: rtl8723bs BT-Coex version = BTCOEX20140507-4E40
[ 29.148730] pnetdev = c3bde000
[ 29.346349] RTL8723BS: rtw_ndev_init(wlan0)
[ 29.363866] RTL8723BS: module init ret =0
2、启动wlan0
root@ubuntu:/# ifconfig wlan0 up
[ 28.250324] rtl8723bs: acquire FW from file:rtlwifi/rtl8723bs_nic.bin
[ 28.476287] random: crng init done
3、连接WIFI
root@ubuntu:/# wpa_supplicant -B -c /etc/wpa_supplicant.conf -i wlan0
Successfully initialized wpa_supplicant
root@ubuntu:/# [ 95.236643] RTL8723BS: nolinked power save enter
[ 100.248490] RTL8723BS: nolinked power save leave
[ 102.446737] RTL8723BS: nolinked power save enter
这里就一直循环出现下面这两条。。。
[ 100.248490] RTL8723BS: nolinked power save leave
[ 102.446737] RTL8723BS: nolinked power save enter
我的配置文件如下:
vi /etc/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
ap_scan=1
network={
ssid="TP-LINK_C166 "
scan_ssid=1
key_mgmt=WPA-EAP WPA-PSK IEEE8021X NONE
pairwise=TKIP CCMP
group=CCMP TKIP WEP104 WEP40
psk="kormee88"
priority=5
}
直接加不行噢,得把相关的依赖也开启才行,具体 grep Kconfig 文件
晕哥我查看了下,发现linux 4.10-y里的staging目录下没有 rtl8723bs的驱动。
···
root@ubuntu:/home/yang/zero_lichipi/linux-zero-4.10.y/drivers/staging# ls
android gdm724x media rtl8188eu vme
board goldfish modules.builtin rtl8192e vt6655
built-in.o greybus modules.order rtl8192u vt6656
clocking-wizard gs_fpgaboot most rtl8712 wilc1000
comedi i4l mt29f_spinand rts5208 wlan-ng
dgnc iio netlogic skein xgifb
emxx_udc Kconfig nvec sm750fb
fbtft ks7010 octeon speakup
fsl-mc lustre octeon-usb unisys
fwserial Makefile olpc_dcon vc04_services
```
下拉linux 4.14-y 源码里面有。
晕哥,我直接在.config配置文件中加CONFIG_RTL8723BS=m 不行。
一编译.config配置文件就被覆盖了。