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HiI want to test the execution speed of SIMD instruction. My demo as below.16-bit addition, for example.I find the instruction __SADD16() in cmsis_gcc.h. The execution time using __SADD16 is 27us and the time without __SADD16 is 23us. It seems like ...
Hi, i'm working with RTC and having issue about getting time. I'm calling HAL_RTC_GetTime function with HAL_RTC_GetDate, it's return old value of time. For example time is 00:10:00 and i called gettime function, it's return 00:09:38. I'm getting time...
I am new in st's mcu.I am going to switch my project to STM32L010 (Nucleo-L010RB).In my project, i need to let mcu going to stop mode and wake up it self every 100ms.How do i do it?Is there any code for me to study?
Hello Guys, I want to read multiple channels from my adc using DMA.However I want to implement it the following way:while(1){1. Start ADC DMA (scan, discontinous conv.)2. Wait for the completion (the CPU should just wait until the conversion of the m...
Hello I am very new to c programming and embedded design. I know there is a right way to do what I am trying to accomplish. I seem to be doing it the wrong way even though my code still "works" I am getting warnings on a couple lines of code. Line ...
Hi all,I got a strange issue. I'd like to use USART3 or UART5 on my STM32F446 chip. We have the chip on a pcb, so I am not talking about the nucleo board. The issue is when I do the system_clock_config(), the listed uarts does not work. void init() ...
I have the strangest problem ever seen and I would not believe it has it not been this repeatable: I have a single DMA controller running 3x streams. Two are for ADC and one for DAC. All three can run simultaneously, the DAC at 1 Msps and the ADCs bo...
I'm running a STM32L073 to generate a sine wave tone via I2S in normal DMA mode. The amplifier is a MAX98357A. The MODE pin is connected to VDD so only left channel is considered. I2S runs at 48kHz and the uC clock source is internal. The output tone...
Hi all, I am using register mode SPI for communication purposes, clock is 210Mhzinterrupt is for every 4khzinitialized SPI with HAL formatSPI data rate: 35MBpswhen I send data through SPI I can find some jitter inside it. But when I drive the same si...
I am trying to transmit through SPI to a MAX7219 chip on my STM32F412G-Discovery board. The system clock is running at 100 MHz. I am using a level shifter to handle the 3.3V -> 5V voltage changing. I have used this IC on an arduino so I do know it wo...
