12/20/2023 0 Comments Ftp simpleftp net![]() It's the default FTP server in NimbleX, Slackware, and many other Linux distributions. Vsftpd also claims it's the "most secure and fastest FTP server for UNIX-like systems". In contrast, vsftpd is more secure and doesn't require many updates. However, it's not widely used due to common hosting panels not handling it's configuration management. In Alpine Linux the default FTP server is vsftpd. Plenty of other clients also exist, but the ones mentioned above are the only ones covered. ![]() FTPS is plain FTP with TLS/SSL encryption.Īlpine Linux has various FTP clients and servers that you can install and use, including the following: SFTP, as the name implies, is done over SSH. Variants of FTP also exist, including SFTP (SSH FTP, not to be confused with Simple FTP) and FTPS (FTP with SSL). FTP is among the oldest protocols as its origins can be traced as far back as 1971 according to Wikipedia. HAL has a very nice function named HAL_Delay(n) that can generate a delay of n milliseconds.FTP (or File Transfer Protocol) is a protocol that allows you to transfer files from a server to a client and vice versa (as FTP uses a client-server architecture). But what if that was not enough and you need to go smaller? Certain things do go on while the delay() function is controlling the STM32 chip, however, because the delay function does not disable interrupts. We’ll have to use one of our timer peripherals to achieve this aim. For example I decide to use TIM1 (timer 1). ![]() First of all, you should find out whether your timer of choice is connected to the APB1 or APB2 bus. You can open the reference manual of your microcontroller, check the “memory map” and try to see which bus it is. When you use a HALDELAY you have to keep in mind that the counting is done in the interrupt routine SysTick. Then set the clock of your microcontroller and be attentive to the APB1/2 Timer Clocks in the clock tree. If you call the HALDELAY in the interrupt that has greater priority, then systick counting is stopped. So the HALDELAY gets stucked in the endless loop do.while, because the systick isn't counting. In STM32Cube, set the “Prescaler” value to one less than your bus clock in MHz. For example if you’re clocking TIM1 with a 72MHz clock, set the prescaler to 71, so that timer would count up every microsecond. This is due to the fact that the counting period of a timer comes from the formula: counting_freq = bus_freq / (Prescaler+1). For example, in UCOS, time-sharing reuse requires a minimum time stamp. If you’re confused about this procedure, check out our timer tutorial. Generally in STM32+UCOS systems, Systick is used to make the UCOS heartbeat clock. ![]() Systick timer is the system tick timer, a 24-bit. In the first part of this post, we will take a look at STM32 microcontrollers, their history and the families of microprocessors and boards. stm32: Add delay after enabling peripheral clock chromiumos/platform/ec : master. Delay is a function thats block the cpu for certain of time and can’t move beyond this point until the delay time is. ![]() The second part includes a step-by-step tutorial on how to set up Keil uVision, create a project and write code to blink the on-board LED on the NUCLEO STM32F103RB. Simple busy waiting for use before clocks/timers are initialized. Then after generating the code, add this function to your program void Delay_us (uint16_t n)Įasy, right? But what does this function do? In the first line the counter register is set to 0, then in the next line there’s a while loop that doesn’t end until the count register reaches the “n”. The reason the while loop is terminated with a semicolon instead of brackets like while loops always do, is because there’s nothing to do in it. It’s just there to count and waste time, and create our delay effect. The HAL library is very simple to implement the delay function. We basically configured the timer to count once every microsecond, so we’ll keep counting from zero until we reach that number in one microsecond intervals. A 32-bit global variable uwTick is defined. ![]()
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