spi interface chip

Configure the Usart module as the most basic SPI mode. No interruption, dead loop sent. Example: #include #include #include "Efm32.h"#include "Efm32_chip.h"#include "Efm32_cmu.h"#include "efm32_gpio.h"#include "Efm32_usart.h" void spi_initial (void) { cmu_clockenable (Cmuclock_hfper, true); Cmu_clockenable (Cmuclock_gpio, true); cmu_clockenable (Cmuclock_usart1, true); usart_initsync_typedef spi_init = usart_initsync_default; nbsp; spi_in

1. Simulation circuit diagram2, explain the analysis circuit diagramDid you find it? The above SCM only used the P0 port is not very good, eliminating the need for the key 8 portsLet's talk about the expansion of the 8255 chip and the peripheral circuitry.82C55 Chip ——— programmable Universal Parallel Interface Circuit (3 x 8-bit I/O ports)D0-D7: Tri-State bidire

　　With the development of computer network technology, as the world's largest computer network, i n T e r ac T has become an important basic information infrastructure in today's information society. In the field of industrial measurement and control, intelligent instrument, intelligent home and so on, a large number of applications embedded equipment i n T e R n e t requirements make embedded i n T E R-AC t technology is becoming a hot topic in research. The key of the embedded device i n T e R

The LCD and CPU cables are divided into control lines and data lines. The control lines are generally based on the SPI protocol. We initialize the LCD registers through this. Under the premise that the output format of the main chip is fixed, LCD adjustment is the rest of the initial registers. Generally, we need to care about this part of LCD transplantation. The data line is used to transmit pixel data to

Introduction to SPI The SPI is all called (Service Provider Interface), a service discovery mechanism built into the JDK. A service usually refers to a known interface or abstract class, the service provider is the implementation of the interface or abstract class, and then

SPI is all called (Service Provider Interface) and is a service delivery discovery mechanism built into the JDK. There are many frameworks that use it to do service expansion discovery, simply put, it is a dynamic substitution discovery mechanism, for example, there is an interface, want to run the dynamic to add to it implementation, you just need to add an impl

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.

status code, encountered this kind of error to check the instruction itself to have the question. When the chip returns 6A80 it belongs to the application layer algorithm exception. When the code execution completes return 1, the encryption chip will output 9000 of the correct status code, if return 0, the output 6A80 error message.4, abnormal first want size endLKT Series

Microcontroller-based USB Interface Design The Design of USB interface based on the single chipLiu jingquan, Wang xiandai (School of Communication and control engineering, Jiangnan University, Wuxi 214122, China) SummaryA usb interface extension method based on single chip microcomputer is proposed. The structure and p

Introduction Flash Memory, also known as flash memory, is a new kind of non-volatile semiconductor storage developed in the late 1980s S. It has the features of Ram and Rom, which can be erased and rewritten online, and keep data intact after power loss. Nor flash is the first kind of flash memory. Compared with other types of flash memory, nor flash has the following advantages: high reliability, fast random reading speed, and single-byte or single-word programming, allows the CPU to directly r

the problem"Before the communication was normal, and now it's not, what's going on?" ”"I sent instructions, the encryption chip is not to reply, is not the chip problem?" ”"I received a data error, is not the cryptographic chip running algorithm error?" ”The content in the above quotation marks is the real information of the user feedback. These problems are des

The RS232 standard was born before RS485, but there are several deficiencies in RS232: The signal level of the interface is higher, to more than 10 V, the use of improper easy to damage the interface chip, level standard is also incompatible with the TTL level. Transmission rate is limited, can not be too high, generally to zero or zero bits per second (kb/s) to

nf5240m3/nf5140m3/nf5280m3/sa5212h2/np5540m3nf5270m3/nf5170m3/nf8420m3 IPMI Board Integrated management chip BMC IP SettingsPress the DEL key to enter BIOS setupSelect "Server Mgmt"---"BMC network Configuration"---"LAN Channel 1/2"---"Static IP Address"LAN Channel 1: Refers to the Multiplexing Management Network port, network card 1 interfaceLAN Channel 2: Refers to the IPMI management private interface, w

Recently, p178g is used, and internal registers need to be controlled to implement the switch and VLAN configuration of each Phy. In order to replace the "pseudo" Switch implemented by the original analog switch, you can use the SMI interface to read and write registers through ds to control the IC operation status. Time Series and format The prefix code of this chip is different from the 32-bit high leve