registereds3c2410-lcd: no platform data for LCD, cannot s3c2410-lcd: probe of s3c2410-lcd failed with error-22lp: driver loaded but no devices foundppdev: User-space parallel port driverserial: 8250/1 6550 driver $ revision: 1.90 $4 ports, IRQ sharing enableds3c2440-uart.0: s3c2410_serial0 at mmio 0x50000000 (IRQ = 70) is a S3C2440s3c2440-uart.1: s3c2410_serial1 at mmio 0x50004000 (IRQ = 73) is a S3C2440s3
The mt7688an System Single chip can be used in the home automation bridge center. It integrates 1t1r 802.11n wi-fi radio, 580 MHz MIPS? 24kec? The CPU, 1-port Fast Ethernet phy, USB2.0 host, PCIe, SD-XC, and I2S/PCM support a variety of low-speed output interfaces in a single Single System Single Chip.
In Iot gateway mode, you can connect to the 802.11ac chipset through the PCIe interface and use it as the dual-band 802.11ac synchronization gate. The high-speed USB 2.0 interface can connect mt
The mt7697 is a highly integrated monolithic chip with application processor, low power 1x111n single-frequency Wi-Fi subsystem, Bluetooth subsystem, and power management unit. I do not know. The application processor subsystem contains an arm cortical-m4 with a floating-point MCU. It also includes many peripheral devices, including Uart,i2c,spi,i2s,pwm,irda and auxiliary ADCs. It also includes embedded Sram/rom. The Wi-Fi subsystem contains 802.11b/g
new functions are automatically used by the connector during connection. This process is called the function of redirecting the C language library, as shown in figure 6.
For example, a user has an I/O device (such as UART ). The original library function fputc () Outputs characters to the debugger control window, but the user changes the output device to the UART port, so that all () the printf () Series F
userdebug
The same as user, doesn t:
* Also installmodules tagged with debug.
* Ro. debuggable = 1
* ADB is enabled by default. MTK supplement differences:
(1) In terms of DEBUG/log, in principle, the user version can only capture limited information, while Eng can capture more information. The debug version is more powerful, and The ENG version is recommended for development and testing.
* Due to the different Ro. Secure Settings of user/eng versions, the user version ADB only has shell permis
I2S transmission. The audio data can be 8/16/32bit and the sampling rate ranges from 8 kHz to 192 kHz.
I2C: Two I2C controllers are supported.
UART: Supports four UART ports, DMA and interrupt modes. uart0/1/2 also supports the irda1.0 function. UART speed up to 3 Mbps.
Gpio: Universal gpio port, function reuse.
IRDA: Independent IrDA controller, compatible with
If you want to access some of the CPU's I/O ports before the kernel runs, use the pointer to define the register for operations. For example, you can run the IO command to feed the dog when extracting the kernel:In the ARCH/ARM/boot/compressed/Misc. c file: 307 arch_decomp_setup (); 308 309 makecrc (); 310 * (volatile unsigned long *) 0x40e00054) = (~ (3 12#define FFUART ((volatile unsigned long *)0x40100000) 13#define BTUART ((volatile unsigned long *)0x40200000) 14#defin
, and their respective interrupt service routines are mounted on this interrupt number. When the CPU responds to this IRQ, it will check the routines attached to this interrupt vector one by one and execute those truly interrupted routines. But the serial port obviously does not belong to PCI, and it is impossible to use the PCI disconnection and interrupt pin registers. What causes the kernel panic?
With the above problems, I discussed various possibilities with hardware engineers and chip desi
washing dishes, flushing, etc. His advantage is fast, but the degree of freedom is small. Using heap is like making your favorite dishes. It is troublesome, but it suits your taste and has a high degree of freedom. This person is really talented. Next I will write a heap of code. This part of the code is excerpted, not completely. The function is to receive data through the XMODEM protocol and put its content in the heap. As shown below
/** = function ==========================================
By default, the operating frequency of the S3C2410 CPU is 12 MHz. The PLL circuit can generate a higher clock speed for the CPU and peripheral devices. The S3C2410 has two PLL: mpll and upll, which are dedicated to upll and USB devices. Mpll is used for CPU and other peripheral devices.
Mpll generates three clock frequencies: fclk, hclk, and Plck. Fclk is used for CPU cores, hclk is used for AHB Bus devices (such as SDRAM), and pclk is used for APB bus devices (such as
(information can be transmitted through the clipboard device in Linux between users and virtual machines)
This is a virtual machine that uses JavaScript to simulate the x86 instruction set using qemu and runs on a browser (my Firefox runs normally. This machine runs a Linux kernel of 2.6.20, the related information of this virtual machine can be seen on the tech page published by the author. You can also log on to the VM and check it.
It is found that the file system is made of busybox. Most Li
data to my mobile phone?
The following explains these questions one by one:
How does the protocol stack work?
To understand how the protocol stack works, we must first understand that 51822 of the protocol stack is event-driven based on 100%. That is to say, any data sent from the protocol stack to the app is event-based.
For example, a device receives a connection request from a mobile phone or data sent from a mobile phone. The protocol stack first receives the data and then processes it.
BLE-NRF51822 tutorial 8-dynamic Broadcast
This topic describes how to implement dynamic broadcast.
The tutorial is based on the Uart example in the 9.0 sdk.
To implement dynamic broadcast, choose broadcast> stop broadcast> modify parameters> restart broadcast.
Therefore, we use a timer to Periodically disable broadcast and then modify broadcast data before enabling broadcast.
In Sdk 9.0, I implemented several broadcast modes, which was a little tro
adapted to AAL5, therefore, hardware is required to provide sufficient program storage space and data storage space, and the CPU processing capability is high enough. To this end, we chose the MPC860SAR chip produced by Motorola.The MPC860SAR chip is a powerful communication processing chip that can not only process Ethernet, HDLC, UART, and other protocols, but also implement SAR functions. The ATM cells produced by the MPC860SAR arrive at the routi
checks:1, the Logo.binsize limit within 4M2, LK logo and kernel logo image isRGB888 Format3, bootanimation picture isPNG formatIf all of the above check OK, you can see the following ways to locate[Solution]First, if it is (Stage 1) black screen, that is, the LK logo is not displayed, then may be the logo resource anomalies, or the bottom of no brush out, need to catch the UART log view, you canLog trace platform.c file inside the Platform_init () fu
Interface Driver DevelopmentThis paper introduces the Java programming Interface driver in the Android development environment . Includes LED interface and driver, backlight adjustment control program, keyboard interface and driver,UART serial port and communication program,Wi-Fi Interface and communication program,3G interface and driver,MediaPlayer player program, etc. led Lights by gpio " Span style= "font-family: the song Body;" > interface gpj
flag.IT0: External interrupt 0 trigger mode. When the it0=0 is low-level trigger mode, it0=1 is the negative jump trigger mode (Edge trigger).7. P1 (90H)
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
8. SCON Serial Control Register (98H)
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
SM0,SM1: Serial mode control.
SM1
SM0
Working style
Function description
Baud r
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.