samsung galaxy device driver

When I tested my app on Samsung Galaxy S4 yesterday, the ondestory () of the first activity was always called during the jump between activity pages, resulting in the returned results from the second activity, the first activity is always oncreate (), and the page is refreshed. In particular, the page is a list and requires network requests. Therefore, frequent network requests are a waste of traffic. Today

://blog.csdn.net/droidphone Original, reproduced please indicate the source, thank you./*****************************************************************************************************/defining a controller device The SPI controller follows the Linux device model framework, so an SPI controller corresponds to a device structure in the code, and for embedded

multiple devices, it is possible that a port or address is reused, and unprotected direct access is an error. The operating system provides such a set of protection mechanisms that the requested IO port/address is not allowed to be applied again (Request_region is used to request IO port number, request_mem_region for IO address).1.I/O Mapping Method (case:/DRIVER/CHAR/PC8736X_GPIO.C)void Request_region (unsigned long from, unsigned long num, const c

(structled_classdev*led_cdev,enumled_brightness value) {NBSP;NBSP;NBSP;NBSP;PRINTK (kern_info "whYx210_led_set\n "); structs5pv210_gpio_led*p =to_gpio (led_cdev) //s5pv210_gpio_led pointer back from Led_classdev pointer if (value==led_off) {//user input 0 o'clock kill the user input is echo0>brightness //writel (Readl (Gpj0dat) | (1After the implementation of the general driver code, make compile, load into the system, the

The following example describes how to add a device driver. Block devices and network devices can be processed accordingly. 1. Put the original file in the linux-2.4.x/driver/Char/; in this example, the file name is xyz. c 2. the device driver's original file must include such a function:Void xyz_init (void) {registe

Linux Device Driver clock management (3) ---- my cake What is missing in the 21st century? There is no shortage of programmers, no shortage of diaosi programmers, programmers everywhere, various training institutions, more than n programmers are born every month, they replace those who are far away from this industry from generation to generation. It is said that programmers have a lot of realm, such as me,