Fives. About fault tolerance involves concept interpretation
1. Stacking: Stack two VSX boards together through the PC104 interface.
2. BoR: BoR (bridge of redundancy), which is a set of buses designed by our company for fault tolerance. The two ends of the bus are connected to the fault-tolerant interface (Redundancy) of two motherboards (A, B).
A SYS
B SYS
1 (GND)
1 (GND)
2 (SYSTEM-A Fail out)
3 (Ext-SYSTEM Fail in)
3 (Ext-SYSTEM Fail in)
2 (SYSTEM-A Fail out)
4 (GPCS0)
5 SYS-GPCS-in
5 SYS-GPCS-in
4 (GPCS0)
6 (TxD9)
7 (RxD9)
7 (RxD9)
6 (TxD9)
3. COM9: There is also a com9 on my company's board. In the BIOS: Chipset → Southbridge Configuration → Redundancy Control Configuration, set the port address and interrupt number. COM9 can be used as the comparison between the two system information and keep the master and slave board. Card information synchronization, of course, you can also use com9 as a high-speed serial port for the transfer of any information between the two cards.
as the picture shows:
4. Controllable and Uncontrollable
The so-called controllable I/O means that the same I/O is used by both devices. The host computer has control I/O rights for the working machine, and it only follows the host to run and does not participate in control.
The commonly used controllable I/Os are: serial port, parallel port, GPIO, keyboard mouse.
Uncontrolled I/O: USB, Ethernet, LCD ...
six. Fault Tolerance Test
1. For the test of register address 6DH, judge whether the system is Master or Slave by reading the data of register address 6DH. You can use software to read the value of 6DH (00000010 master master, 00000001 slave slave) to determine the master slave master board.
as the picture shows:
2. Determine the master/slave drive by reading/writing the SRAM address value in debug mode. The Master system can access the SRAM space of the Slave system. The access (read/write) mode can be set in the BIOS. SLAVE The system cannot access the master system's SRAM. Because Master has mastership and Slave does not.
Seven. Typical case analysis
The above picture shows a ground division of the aviation division. When the host is powered on, two VSX-6154 motherboards are started at the same time. One random master and one slave are determined in chronological order. Master has mastership and suppresses Slave's various functions, so the display shows Master's content. Slave just follows the Master. The mastert receives the information and transmits the information to the display. At the same time, the information matching with the slave is completed through the BoR bus to achieve the synchronization of the information. If the Master restarts because of an accident, then the Master pushes control to the Slave at the moment of crash, Slave becomes the Master after receiving the Master's signal, and will continue to run. After the original Master lost control power by restarting or repairing, it became the new Slave until the machine took over the work of the Master again.
After the control room monitors the aircraft condition, the commander instructs the aircraft to make an orderly flight, takeoff and landing. Suddenly the Master restarts accidentally. Slave immediately takes over the work of the master, collects the radar information and displays it on the display. After the restart, the Master , Become Slave, the original Master becomes Slave, read the main information through COM9, synchronize with the main information, always ready to take over the Lord's work, and all this happened before the console commander did not know . If there is only one main board, everything that happens can be imagined.
Eight. In summary, Vortex86SX fault tolerance is very simple and powerful. It mainly has the following major features:
Master/Slave motherboard harmonic operation
Can diagnose six unpredictable system crashes
Master/Slave motherboard converts within 1 us (10 negative 6th power second)
Can suppress the ISA bus under the Slave motherboard
Programmable Slave Slave Motherboard I/O Port (Set in BIOS)
Design high-speed serial port for data transmission between Master/Slave motherboards
Master/Slave Motherboard Provides 4KB SRAM for Data Exchange and Backup
Support system crash count
Wireless Charging and Storage Sensor Light combines three needed functions all in one product. The original intention is to satisfy users` demands at utmost.
Functions and Features:
- Gesture Sensor Light: warm light, no flickering, without physical switch, you can turn on/off and adjust lightness just by moving hand above induction area. As a bedside lighting, it will be convenient while wake up at midnight, for baby nursing or to toilet etc.
- Bedside Storage: anti-skid sunken design, a safe and temporary storage station for watch, jewellery, finger ring etc., before sleeping
- Wireless Charging Area: as long as your mobile phone meets the QI Standard, it can be efficiently charged by settling it on the wireless charging Area.
Recommendation for use: supply power to product by 5V/2A power adapter
Introduction on QI Standard:
The Wireless Power Consortium (WPC) is a multinational technology consortium formed in December 17, 2008 and based in Piscataway, New Jersey. Its mission is to create and promote wide market adoption of its interface standard Qi, used for wireless charging across a number of products. It is an open membership of Asian, European, and American companies, working toward the global standardization of wireless charging technology. (from Wikipedia)
Specification:
Wireless Charging Sensor Light
Wireless Charging Sensor Light,Reading Lamp,Bedside Lamps,Led Cabinet Light
Ningbo Sinco Industrial & Trading Co., Ltd. , http://www.newsinco.com