ble i2c

Tags: blog HTTP use strong SP data on log BS The I2C (Inter-Integrated Circuit) bus is a two-line serial bus developed by Philips to connect the microcontroller and its peripheral devices. The I2C bus was originally developed for audio and video devices in 1980s and is now mainly used in server management, including communication in the status of a single component. For example, the administrator can quer

1. IntroductionBLE (Bluetooth low-energy, Bluetooth) is a complement to traditional Bluetooth BR/EDR technology. Although BLE and traditional Bluetooth are known as Bluetooth standards and share RF, ble is a completely different technology. ble does not have compatibility with traditional Bluetooth Br/edr . It is designed for small data rate, discrete transmissio

call the device_add () function,After registering OK, the directory/sys/devices/platform/power will also appear. It will also be added to dpm_list.The I2C controller peripheral represents a device registered on the platform bus, that is, its parent device is platform.Finally, in platform_device_add (), the device_add () function is called to add the device/A power directory appears in the mt6516-i2c.1/mt65

Learning points: 1. Driver entry point, at which stage is loaded, and how to adjust the sequence of driver loading; 2. How are devices and drivers associated; 3. I2C bus operation, I2C protocol; 4. Power Management, including power application, power on, and standby processing; 5. input device registration and event reporting; 6. multi-touch device events and parameters; 7. Adjust the direction; 1. First,

I2c4_sda/gpio7_c1 Gpio7c1 I2c4tp_sda I2c4_scl/gpio7_c2 Gpio7c2 I2c4tp_scl In the/kernel/arch/arm/boot/dts/rk3288.dtsi there are:I2C4: [email protected] {compatible = "ROCKCHIP,RK30-I2C"; reg = Here, the property associated with the multiplexing control is pinctrl-: Pinctrl-names defines a list of state names: Default (I²c function) and Gpio two states. Pinctrl-0 defines the PIN

Debugging touchpanel has been around for a while. Today, the platform is msm7x27, android2.2, and TP is mainly I2C. I2C is not introduced here, but self-search is unclear, this article mainly introduces the content of TP porting on this platform. Note that the platform uses hardware I2C instead of gpio simulation. 1. File nodes of devices and drivers The device i

Introduction to Ti low-power Bluetooth (BLE) This document is translated and modified from reference materials: cc2540bluetooth low energy software developer's Guide (rev. B). Some images are directly referenced in this document. First draft to be modified. I. Overview 1. Ble Bluetooth protocol stack structure Figure 6 ble Bluetooth protocol stack structure T

with a I2C device driver. We analyze (at24_driver), the members of the inside, the more important members have 2, one is the probe function, the other is At24_ids, which holds the ID list of support AT24 devices, such as AT24C02,AT24C08, etc. Interested can look at this table. We then analyze the probe function. This function is very long, if you want to read every line of code is certainly very difficult, we should be the most basic grasp of the

System: Fedora Core4 Kernel: 2.6.11.1 Error occurred: 1, CC DRIVERS/I2C/I2C-CORE.OIn the file included from drivers/i2c/i2c-core.c:29:Include/linux/i2c.h:58:error:array type has incomplete element typeInclude/linux/i2c.h:197:error:array type has incomplete element typedrivers/i2c