Void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) I am using HAL_TIM_IC_CaptureCallback() function to measure the pulse frequency as follows. Using pulse_frequency rather than pulse_width(time) to avoid float Tweaking with NVIC priority for timer (Not exactly know any standard method, was just giving less priority to Timer as Systick)Ĥ. I have even experimented to include some delay(few msecs) for the data transfer to start.ģ. I have made sure the data transfer will start with external interrupt(push_button on STM32F3-Discovery) which triggers input capture on STM32E407.Ģ. I have configured one external interrupt pin triggered by user_button on STM32F3Discovery for hardware flow control.ġ. I have configured TIMer4(CH3) of STM32E407, for a period of 0xFFFF and up-count mode.According to my clock configuration, timer peripheral clock frequency is 64MHz. The problem for me is with Manch_Rx(Decoding) part. Programming: Manch_Tx (Encoding) part was very easy and working quite as expected. I have configured both boards for the same clock configuration. As an initial step, I want to test for sending simple hex data(0xFE96) from STM32F3Discovery to STM32E407 using Manchester coding following this App_Note, with time-based decoding approach. I am using two boards for this project, one is STM32E407 and the other is STM32F3Discovery. To decode the identifier of an MCU, break up its name in the described parts and use the tables to decipher the values.I want to use Manchester Coding for my DALI Master-slave project. However, in some rare cases, there might be inconsistencies. Using STM32 Naming Conventions to Your AdvantageĪlmost all models of the STM32 family of MCUs will follow these naming conventions. If you do so, you'll see that this is a low-power Cortex M3 MCU with 64 KByte of flash memory that comes in a 64-pin LQFP package that'll operate in a temperature range between -40☌ and 85☌. With the tables presented to you in this article, you should quickly be able to decipher that name. The beginning of this article featured the STM32L151R8T6 as an example. For the line of the MCU, refer to the STM product page, as this is not universal among the devices.Īnd last, but not least, the temperature range: Note that some numbers might refer to the same core, for example, one and two. For example, the STM32 F2 series, which is a high-performance MCU. It’s interesting to note that the names largely follow a scheme, however, they evolve with the products, and some names fall out of the scheme. The following tables will help you understand what each value within every field mentioned above means. The last number informs you about the device’s operating temperature range: This is followed by the package descriptor. After that comes either a number or a letter that denotes the MCU’s flash-memory size. The following letter denotes the number of pins. The line describes the features of this particular device, for example, the peripherals, and the speed. The next two numbers describe the line of the MCU. The number that follows tells you which ARM Core was used. That is then followed by a single uppercase letter, which describes the type. The name of every STM32 MCU starts with STM32, which denotes the MCU family. This article will use the STM32L151R8T6 to explain what each part of its name means. They follow a clever naming convention, and in this blog, we’ll discuss what each part of that identifier means so that you can quickly decipher the cryptic model numbers in the future! Dissecting the Model Identifier for STM32 However, these descriptors aren’t chosen at random. Many of these MCUs come with numerous features, and it’s often quite hard to make sense of the name that’s printed on the IC’s case. The STM32 is a 32-bit family of microcontrollers produced by STM based on popular 32-bit ARM RISC processing cores.
0 kommentar(er)
