bluetooth spi

As the accessory of mobile communication, choose Traditional Bluetooth (Classic BT) and low power consumption Bluetooth (BLE) to compare and discuss the process; First clear our function is to use mobile phone with the attachment of communication, to achieve mobile viewing status (data Flow direction: Accessories-> mobile phone), and control accessories (data flow direction: Mobile phone-> accessories). The

The Bluetooth mouse we purchased last week has been back. fortunately, it was the first time I used a wireless mouse. It was good to feel that there was no tail restriction and it was very convenient. There are two aspects to my worries. On the one hand, there are still limitations in buying such a thing online, I have never touched it myself, but I am very enthusiastic about the seller. I also took a picture on the spot to show it to me, but the mous

method One: 1. We directly in the computer desktop State in accordance with the "WIN" + "C" on the keyboard to open the windows8.1 system's Super button. 2. Then we go to the Super button and find "settings" as shown in the figure. 3. Then in the go to the Super button we find "Change computer settings" Click to enter, as shown in the following figure. 4. Then we find "Computer settings" below the "computer and equipment" shown in the following image. 5. Now we will see a "

;}NSLog(@"服务：%@",service.UUID);for(CBCharacteristic *characteristic in service.characteristics){//发现特征if([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"xxxxxxx"]]) {NSLog(@"监听：%@",characteristic);//监听特征[self.peripheral setNotifyValue:YESforCharacteristic:characteristic];}}} 5 Data interaction with peripherals (read and write)　　Read 12345678910111213 - (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic err

First, from the Start menu, go to Control Panel, and click "Add Device" in the "category" view. Second, adjust the Bluetooth device (for example, the phone here) to be searchable. Third, after the computer search the Bluetooth device, click "Next". The fourth step, appears the authentication code prompt, chooses "is", then clicks "Next", clicks on the handset to agree to match, then waits for

The ISA board connects ltc1448 using a port register, and uses software to simulate SPI timing writing data # Include

http://blog.csdn.net/pengwangguo/article/details/52292664http://blog.csdn.net/pengwangguo/article/details/51991750Http://www.cnblogs.com/surpassal/category/412020.htmlhttp://blog.csdn.net/a746742897/article/details/52803865http://blog.csdn.net/emsoften/article/details/46817543 nandpl353 DriveHttp://www.wiki.xilinx.com/Zynq+Pl353+SMC+and+NAND+driversHttp://infocenter.arm.com/help/topic/com.arm.doc.ddi0380g/DDI0380G_smc_pl350_series_r2p1_trm.pdfhttp://download.csdn.net/detail/sydxie/7225335 NANDEm

Because there is not enough flash space inside the master to store the code. Therefore, it is necessary to use the SPI bus to plug Flash as a code storage area. This requires a bank mechanism. Bank processing of the code, stored separately. The closely related function code is placed in the same bank area. The code for the entire bank is copied to the master internal RAM when the program is run, and the cache runs. Because such a complex mechanism

This section provides sample code for the msp430f5438a SPI Read and write SD card, using the official library msp430_driverlib_2_60_00_02, using IAR for msp430 6.3 by compiling. This section of the code does not differentiate the SD card, so only the SDHC card is operated, and the program is verified to work properly on the Kingston 8GB SDHC microSD card. sdhc.h #ifndef _sdhc_h_ #define _SDHC_H_ #define SDHC_INIT_CLK 125000 #define SDHC_HIGH_CLK 312

I use the ADC081SD chip, Cpol:cs is pulled to low power sclk is high, Cpol for 1,cs was pulled to low power sclk for 0 o'clock, Cpol for 0;The Cpha:cs is pulled to the low level after the first clock edge is 0, and the second clock along the acquisition data is 1.When the corresponding acquisition data bits of the clock rise are stable, the rising edge is collected, and the clock falling along the corresponding acquisition data bits are collected along the falling edge.As shown in the SCLK, the

more than one transfer on the bus, the DMA unit generates the next memory address and the initial transfer.3. Once the DMA transfer is complete, the DMA controller has a interrupt to the CPU. Compare Polling Interrupt-driven I/O Dma Advantages Easy to perform, can use software to change the CPU polling sequence Without a lot of time on polling. Suitable for high speed devicesWithout a lot of time on polling.

Flash has the characteristics of power-down data storage. If Ram power-down occurs, data is lost, but Ram speed is higher. Theoretically, there is no limit on the number of writes, But Flash does not.Compared with other types of flash, NAND Flash has the advantage of high erasability and high write speed. However, Bad blocks may occur during use and use.Can be used only after processing. It is mainly used for data storage, and most USB flash drives are NAND Flash.Nor flash read/write timing is s