One-wire Demo on the stm32f4 Discovery BoardSome of the devs at work were struggling to get their software talking to a Dallas 1-wire device. I remember doing 1-wire comms back on the 1990s, but I hadn ' t do any 1-wire lately and all of my old code is for Proces Sors I no longer had running. But I had a weekend free, so I figured I ' d pulling some old 1-wire devices out of the junk bin and write a bit o '
VGA Output from STM32F4 Discovery BoardI Love the web!There is so many cool projects off there, and some, with a tweak or both,Get me where I want to go quickly, saving a ton of time and effort.Case in Point:the artektit page on VGA output using a 36-pin STM32.The Artekit gang developed a minimalist VGA implementation using one of the boards they sell,With a-a-MHz stm32f103 device on-board.I say "minimalist
A long time ago, He transplanted the dot doctor program from stm32f103 to STM32F4-Discovery (stm32f407), battery, gyroscope and PWM motor control programs have been tested, running for a period of time, normal. The following pictures are all connected by dubang, gyroscope, serial port, and other peripherals. In addition, there is also the nrf24l01, but the program of the nrf24l01 can read and write register
My STM32F4 discovery has an accelerometer lis302dl on top. In the demonstration project, ST's engineers used the sensor to do a very admirable thing: to solve the development Board posture. When the development Board is tilted, the top led is lit and the other LEDs are not lit. At the same time, the Development Board will be virtual into a mouse when the board is connected to the computer with a microUSB ca
, meaning read/write operations to the preload event require an update event.Value |=0x8; //[2] Set the OC1FE bit to 0, the output compare fast enable is disabled//[1:0] Set the cc1s bits to 0, the channel is configured as an output. //* Set the TIMX_CCMR1 Register: * TIM1->CCMR1 = value; //* * * TIM1 capture/compare enable Register:ccerValue =0; //[15:4]-Don ' t care://[3] Set CC1NP bit to zero for active high. //[2] Set cc1ne bit to 0, to de-activate the OC1N signal//value |= 0x4; //[1] Set
STM32F4 Serial transceiver Using DMA is still very convenient. However, configuring the DMA requires the configuration of the data length, which can be used to pre-estimate the length of the Send to configure the DMA send data length, but for the reception is not a good solution, because if the use of DMA receive interrupt is to configure the length of the data to be configured to 0 to start the outage. However, it is not possible to determine the len
in order to better coordinate the work between io , it is necessary to give the IO Port A different function at the appropriate time, an io The mouth can take on different tasks at different times, which is the multiplexing function of IO .Second, the principle of re-use:Each IO port is followed by a selector that, after the configuration of the corresponding registers (gpiox_afrh and gpiox_afrl), can be used to perform different functions, and this register is gpiox_afrh and gpiox_afrl.Three,
/** Trigger Select mapping for slave timer from master timer. This was * unfortunately not very straightforward; There ' s no tidy-on-the-algorithmically. To avoid burning memory for a lookup table, use macros to * compute the offset. This also have the benefit that compilation would fail if * An unsupported master/slave pairing is used. * * Slave Master * 1 2 3 4 (stm32f100 only) * 2 9 10 3 4 * 3 9 2 11 4 * 4 2 3 9 * 9 2 3 (stm32l15x only) *--------------------* ts = 0 1 2 3*/#defineStm32_
symbol table. Then connect to the 3333 Port. (GDB) Target remote localhost:3333Remote Debugging using localhost:3333Warning:loadable segment "Rw_iram1" Outside of ELF segmentsAt.. \.. \.. \libraries\cmsis\st\stm32f4xx\source\templates\arm\/startup_stm32f4xx.s:175175 LDR R0, =systeminit(GDB) Monitor Reset haltTarget state:haltedTarget halted due to debug-request, current Mode:threadxpsr:0x01000000 pc:0x0800019c msp:0x20000c78(GDB)then you can use various gdb the command was debugged. (GDB) B mai
, this pulse is too narrow to meet the width of my application requirements, only the use of Gpio.The receive event has not been tested, but the pin mode in the code can be set to:#define Gpio_mode_evt_rising ((uint32_t) 0x10120000)/*!#define Gpio_mode_evt_falling ((uint32_t) 0x10220000)/*!#define Gpio_mode_evt_rising_falling ((uint32_t) 0x10320000)/*!The receiver does not treat the event as an interrupt, but rather as a wake-up signal. Reference pm0214:stm32f3 and
I use the Serial wizard to send the data no problem, but the receiving data did not respond.Serial port to accept the time must be interrupted, you send only by a single flag bit can be judged, but the acceptance of time, you are always stay in while inside, we judge whether to accept the completion, by detecting whether to receive 0x0d, 0x0a continuous to detect whether the end. When this end sequence is detected, the highest bit of the usart_rx_sta is placed to mark the data that has been sear
Stm32f4:generating parallel signals with the FSMCThe goal: the memory controller can be used to generate a "generic" 16-bit parallel data stream with clock. Address generation is disregarded, as well as the other control signals dedicated to memory chips.It must is noted that the stm32f40x and stm32f41x has the FSMC (static memories), while thestm32f42 x and stm32f43x have the FMC (static and dynamic Memories). The differences between the concern the
Bug in STM32F4 Series MCU, window watchdog WWDG.
1. If it is possible to pre-feed the dog interrupt, then the following two points must be met
(1) Before turning on the WWDG interrupt, the EWI flag bit in the SR register must be zeroed out, otherwise the watchdog will constantly reset
(2) Add a small delay to the WWDG_IRQ, otherwise the watchdog will be constantly reset
2. If there are other interrupts in the system, such as keystrokes, set a vari
Overview
Hardware on the use of stm32f4+mpu9150 implementation of the neural network recognition gesture, but not with the IMU geomagnetic data, only with the three-axis accelerometer and three-axis gyroscope data, the board is the main reference to the Italian official Development Board schematic diagram (Life painting the first board has not been wrong ha, Let's have a little bit more fun ... )。 MPU9150 drive is used by the InvenSense to provide EM
Zabbix Automatic Discovery (Discovery) Feature usage
With the monitoring host increasing, sometimes need to add a number of machines, especially the children's shoes just with Zabbix need to add all the company's servers to Zabbix, if using traditional methods to add devices, groups, projects, images ... the result should be the result of vomiting.
In view of this problem we can make good use of a
In-depth analysis of the Package in Laravel5.5, automatic Discovery of Package Auto Discovery, laravel5.5package
Preface
In earlier Laravel versions, the installation package usually requires several steps, such as adding a service provider to the app configuration file and registering related facades. Now, from Laravel 5.5, Laravel can automatically detect and register the service providers and facades.
Th
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.