这个一阶,二阶就是指打激光孔的次数,PCB芯板压合几次,打几次激光孔!就是几阶。
这是一阶 ,如下图所示:
这是二阶。主要就是看你镭射的次数是几次,就是几阶了。
二阶就分叠孔与分叉孔两种。
如下图是八层二阶叠孔,是3-6层先压合好,外面2,7两层压上去,打一次镭射孔。再把1,8层压上去再打一次镭射孔。就是打两次镭射孔。这种孔因为是叠加起来的,工艺难度会高一点,成本就高一点。
如下图是八层二阶交叉盲孔,这种加工方法与上面八层二阶叠孔一样,也需要打两次镭射孔。但镭射孔不是叠在一起的,加工难度就少很多。
三阶,四阶就依次类推了。
这个小架构又美又秀 我们通常认为,在中断中,不能执行耗时的操作,否则会影响系统的稳定性,尤其对于嵌入式编程。对于带操作系统的程序而言,可以通过操作系统的调度,将中断处理分成两个部分,耗时的操作可以放到线程中去执行,但是对于没有操作系统的情况,又应该如何处理呢
比较常见的,我们可能会定义一些全局变量,作为flag,然后在mainloop中不停的判断这些flag,再在中断中修改这些flag,最后在mainloop中执行具体的逻辑,但是这样,无疑会增加耦合,增加程序维护成本。
cpost正是应用在这种情况下的一个简单但又十分方便的工具,它可以特别方便的进行上下文的切换,减少模块耦合。 cpost链接: https://github.com/NevermindZZT/cpost
cpost借鉴的Android的handler机制,通过在mainloop中跑一个任务,然后在其他地方,可以是中断,也可以是模块逻辑中,直接抛出需要执行的函数,使其脱离调用处的上下文,运行在mainloop中。cpost还支持延迟处理,可以指定函数在抛出后多久执行。
摘要:LCD是嵌入式常见设备,如何在LCD上显示汉字和英文?矢量字体和点阵字体有何不同?同一个字符为何有多种编码?GB2312、GB18030指什么?他们之间有关系吗?嵌入式设备如何支持多国语言?从哪里获取字库?需要付费吗?以上问题,本文一一道来! 嵌入式屏幕上的汉字原来是这样显示的
This sample is based on R-Car S4 SDK v3.16.0.
SCP sample application consists of Linux on CA55, SCP sample application on CR52 and SCP sample application on G4MH and they can communicate with SCMI.
You need to rebuild Linux Image, dtb, ICUMX firmware and Security BSP for SCP.
SCP sample application on CR52 and G4MH is built on MCAL build tree. You need to install SCP code on MCAL build tree and to edit MCAL build systems to build SCP module.
SCP module needs MCAL MCU library. You must build MCAL MCU module before building SCP sample application.
Index | Software Name | Software Type |
---|---|---|
1 | R-Car S4 G4MH MCAL ASIL | mcal_sdk-gateway_v3.16.0_release.exe |
2 | R-Car S4 CA55 SCP for Linux | rcar-xos_sdk1-gateway_v3.16.0_release.exe |
3 | Poky Linux toolchain | rcar_tool_ubuntu_v3.16.0.zip |
Index | Terminal Name | Link |
---|---|---|
1 | git bash | https://gitforwindows.org/ |
2 | VS Code terminal | https://code.visualstudio.com/ |
3 | Cygwin terminal | http://www.cygwin.com/ |
Index | Compiler | Target | License |
---|---|---|---|
1 | GHS | for (G4MH) MCU library, G4MH SCP sample application; for (ICUMX) IPL, Dummy FW and Dummy MCU | license is necessary |
2 | ARM Compiler | for (CR52) MCU library, | license is necessary |
3 | Cygwin terminal | http://www.cygwin.com/ | |
4 | GNUWin32 | C:\d_disk\RenesasMCUHWM\RCar\Gen4\R-Car_S4\s4_dev\tools\GnuWin32\GetGnuWin32\gnuwin32\bin |
(here, git bash is used.)
# Step 1. Install SCP code
# Unzip SCP source tree on MCAL source tree.
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal/rel/modules/scp
$ unzip g4mh_scp.zip
# Step 2. Apply the patches to build MCU libraries with reset function
# Apply the patches to enable reset function on MCAL MCU module.
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal
$ patch -p 1 <rel/modules/scp/patches/0001-edit-mcu-config-for-scp.patch
patching file rel/modules/mcu/sample_application/S4/19_11/config/App_MCU_S4_RTM8RC79FG_Sample.arxml
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal
$ patch -p 1 <rel/modules/scp/patches/0002-add-rte-for-scp.patch
patching file rel/common/generic/stubs/19_11/Rte/include/SchM_Scp.h
patching file rel/common/generic/stubs/19_11/Rte/make/rte_rules.mak
patching file rel/common/generic/stubs/19_11/Rte/src/SchM_Scp.c
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal
$ patch -p 1 <rel/modules/scp/patches/0003-edit-common.mak.patch
patching file rel/S4/common_family/make/ghs/Common.mak
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal
$ patch -p 1 <rel/modules/scp/patches/0004-enable-mfis-interrupt.patch
patching file rel/S4/common_family/src/ghs/Interrupt_VectorTable_PE0.c
a5059726@CHN-5CG1064GKY MINGW64 /c/Renesas/mcal/v3.16.0/sw_src/g4mh_mcal
$ patch -p 1 <rel/modules/scp/patches/0005-SampleApp.bat-enable-build.patch
patching file rel/S4/common_family/make/ghs/SampleApp.bat
C:\Renesas\mcal\v3.16.0\sw_src\g4mh_mcal\rel\S4\common_family\make\ghs>SampleApp.bat mcu R19-11 S4 No
...
common.mak:125: \cygdrive\c\Renesas\mcal\v3.16.0\sw_src\g4mh_mcal\rel\common\generic\compiler\19_11\ghs\make\ghs_rh850_r19_11_defs.mak: No such file or directory
...
note:
# 查看环境变量"GNUMAKE"
PS C:\Renesas\mcal\v3.16.0\sw_src\g4mh_mcal\rel\S4\common_family\make\ghs> $env:GNUMAKE
3.3V->2.5V / 2.5V->3.3V / 1.8V->3.3V : LSFT0101DRYR/HD74LV1GT08A
3.3V<->2.5V : TXS0102DCUT