Document PurposeShared memory is the sharing of memories, and the sharing of information between different processes through a small segment of memory, enabling interprocess communication. This article mainly introduces the transmission of information between Qualcomm Aboot (LK) and the kernel (kernel). In the traditional lk-"kernel information is used cmdline, but this method is only suitable for passing short information, for a large segment of info
@ Crap in the front
A VR game that wanted to do the Storm mirror before, finally came to Hong Kong to learn equipment did not bring over to do, and now began to learn to do the development of AR game, after all, the requirements of the equipment is
First, make sure that you have 12 RMB and a built-in cup
When I came to the order, I was determined not to hesitate to say in your most magnetic VOICE: MissPlease give me a cup of espresso ~~
At this time, the person who ordered the ticket will
I received a recommendation email from infoq today. I was very interested in reading the title. It took some time to read it. It was a good case analysis and I learned a lot. Let's take a rough look at someArticleKey content. Case:
Mr Ren says the strategy for American companies is to go down from a very high point (Top-down). Chinese companies are playing from a very low point (bottom up).
A bit from top to bottom is to ensure that the architecture and performance of the
TP Touch screen, should be the driver in the development of relatively simple and suitable for beginners to start the module. However, although simple, but related to the content is more, among them the main mechanism of Linux:
1. Input mechanism
2.
The Problem Analysis steps are as follows:
I,
GPT probability of the msm8916 platform: after the software is downloaded using the qpst emmc Software Download tool, it cannot be started. For example:
Log analysis indicates that the userdata partition
1. Add the following content to the onboard information:
A. first enter the kernel/ARCH/ARM/Mach-MSM/board-msm7x30.c In the struct platform_device * devices [] _ initdata {}; Add the variable & msm_devices_uart3,
Configure the variable struct msm_
Nubia Z5S enters the QHSUSB_BULK mode in case of an exception or combination of buttons. This mode means that if the data line is connected to windows (such as win7, there will be n multi-partition mounting on the computer, and even a prompt will be
12.1680-v6107-20.rev_a_debug_troubleshoot.pdf
When the function is called, The R0-R3 passes four parameters, the rest are saved through the stack, and the parameters are imported from the right to the left order into the stack.
R13 is the stack
Several Problems in the Display Section have been clarified through actual tests over the past few days, mainly including the usage of each module and the calling process of several modules in the Hal layer. The problem is described as follows:
0.
Qualcomm's new camera driver architecture design has undergone some changes, borrowing a structure commonly used on the Internet, with the general principle of dividing all of the camera's functions into different modules, allowing the module to
Sensor module1. OverviewSensor module is one of many modules, mainly by the module's various hardware modules, including sensor, Flash, Af, EEprom, OIS, CSI and so on. This module mainly describes some working principles of the module hardware and
Nubia Z5s in the case of an exception or a combination of keys will enter the Qhsusb_bulk mode, the phenomenon is that if the windows (such as Win7) connected to the data cable, it will appear on the computer n multi-partition mount, and even
Modifications to the hardware MBN might is necessary to match the specific hardware design.The hardware MBN contains NV 4398 (UIM Select Default USIM application) and NV 70210 (UIM HW Config), which configure many GPIO mappings. Verify that they is
1. Set the camera direction
2. Open the thread and preview thread
3. Set Parameters
4. Camera peripheral buttons
5. Auto Focus and touch focus
6. Take a photo
7. Face Detection
8. Location Management
9. rotation Management
10. Zoom
11. Video
The
Welcome to follow the pan-Thai non-profit third-party development team VegaDevTeam (this team is composed of syhost suky zhaochengw (z) xuefy (big star) tenfar (R master) loogeo crazyi (snow-free world) windxixi) wangsai008)
Brief history of
Welcome to follow the pan-Thai non-profit third-party development team VegaDevTeam (this team is composed of syhost suky zhaochengw (z) xuefy (big star) tenfar (R master) loogeo crazyi (snow-free world) windxixi) wangsai008)
Brief history of
1. When the SIM card status changes, the modem side sends the qcril_evt_uim_qmi_indication event to the AP side.
2. the ap-side qcril UIM module (qcril_uim.c and other files) is used to process SIM card-related services. When a qcril_evt_uim_qmi_
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