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I'm using a STM32L0 MCU for my project. The MCU has a Low-power Timer (LPTIM) for waking the MCU up from Stop-Mode, and a Low-power UART (LPUART) for both waking up the MCU from stop mode and receive/transmit data. My problem is: - When I let the MCU staying in running mode, LPUART working fine at baudrate over 256000. - When I set MCU to go to Stop-mode, then when the MCU receives something from LPUART-Rx, it's woken up and keep reading the received sequence data. For this set up, when UART baudrate is lower than 56000 it works fine. However when the baudrate is higher than this (e.g at 115200), LPUART read the wrong data. I'm aware that in this set-up, the first transmitted byte will be lost but the others should be read correctly. there is a limit in Low-power UART but only when using LSI/LSE. In my case, when LPUART receives something, DSP will be woken up and using HSI clock. And also when staying in Run-mode, LPUART has no problem with high baudrate (at least up to 256000 as I tested). I tried with several different transmitted data with different lengths, however the received data is always wrong. (work fine when baudrate is 56000 though). Hope you can give me some advice! Best regards!
It seems Arduino Due ( 32-bit, 84 Mhz, ARM-Cortex-M3-based SAM3X8E ) was released today. In addition, clearly there is a myriad of processors in this category ( 32-bit / 48-96 Mhz / ARM ) as well as corresponding prototyping boards: NXP LPC1768 / mBed STM32 / Discovery PIC32 / ChipKit PIC32 / Parallax Propeller LM4F120 / TI Launchpad etc. I am trying to understand the appeal of these "in-between" microprocessors, which to me appear to lie in between the low-end AVR/MSP430/etc. (pros: inexpensive, low-power, small-footprint) and the high-end ARM7/etc (pro: capable of far greater instructions per second). In what situations or ways are 32-bit / 48-96 Mhz / ARM-based microprocessors a suitable choice? More specifically, I am wondering in what applications or in which parameters they would make for a superior choice during design, over both the low-end 8-bit microcontrollers or the the very high-end ARM7 processors.
Hello new to Digilent and PmodAD5, Looking for advice and help on picking right micro-controller or components to capture data coming out of PmodAD5. Background I want to capture data coming form Gyro (http://www.analog.com/en/products/mems/mems-gyroscopes/adxrs649.html#product-overview) with the the PmodAD5. Wanted to know what micro-controller you guys would recommend for this task. I am familiar with MSP430 launchpad and very familiar with Arduino. I just want to get something up and working to get familiar with PmodAD5. Any help wound be great Thanks