I'm not building anything, I'm just curious. I worked on a machine in the 80's called an attached array processor capable of 100 MFLOPS, the...

I'm not building anything, I'm just curious. I worked on a machine in the 80's called an attached array processor capable of 100 MFLOPS, the ST-100. It could do a 1K complex FFT in 0.86 msec. What sort of device would be required to do this today? A desktop would far exceed this performance. Low end single chip processors like an ARM CM3 would probably not reach this performanc

I need to connect the GPIO pins in the ARM machine emulated in QEMU to the GUI objects in application working on the host machine. For example,...

I need to connect the GPIO pins in the ARM machine emulated in QEMU to the GUI objects in application working on the host machine. For example, the level on the output GPIO should be reflected by a color of a rectangle. The input GPIO should be connected to a button. When the button in GUI is pressed, the input GPIO should be read as zero (otherwise as one) etc. Of course the input

I'm working on a Cortex-M4 MCU and using FreeRTOS. One task: uint32_t wait_period; while(1) { // make some things ...

I'm working on a Cortex-M4 MCU and using FreeRTOS. One task: uint32_t wait_period; while(1) { // make some things vTaskDelay(pdMS_TO_TICKS(wait_period)); } The following function can be called from another task: void set_waiting_period(uint32_t new_period) { wait_period = new_period; } In this case, is it needed to protect the access of the shared variable wait_pe...

I try to get PCIe working in congatec SMX8 connected to the conga-SKIT/ARM i.MX8 motherboard. I use it with XTRX software radio module from...

I try to get PCIe working in congatec SMX8 connected to the conga-SKIT/ARM i.MX8 motherboard. I use it with XTRX software radio module from Fairwaves. Unfortunately, the PCIe controller does not start both with XTRX connected directly to MiniPCIe slot and with XTRX connected via original adapter to the M2 slot. I get the following in the dmesg: 0.000000] Booting Linux on physical CPU ...

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----------------------------------------------------------------------- Notice of CANCELLATION 25th...

----------------------------------------------------------------------- Notice of CANCELLATION 25th Ada-Europe International Conference on Reliable Software Technologies (AEiC 2020) www.ada-europe.org/conference2020 (was planned to be held 8-12 June 2020, Santander, Spain) #AdaEurope #AEiC2020 #A...

Maybe someone remember the thread[1] that I created some months ago. I was searching a simple way to save on the external SPI Flash some...

Maybe someone remember the thread[1] that I created some months ago. I was searching a simple way to save on the external SPI Flash some constant data (mainly bitmaps) and copying them to SDRAM at startup. I finally put my hands on that project again and I think I've found a good solution. The MCU (LPC1785 from NXP) has an internal Flash memory starting from 0x0000 0000 and an extern...

I have a board that mounts STM32L4R9 MCU. I'm interested in the native USB bootloader, the one that resides in system memory. The BOOT0 pin...

I have a board that mounts STM32L4R9 MCU. I'm interested in the native USB bootloader, the one that resides in system memory. The BOOT0 pin can be pulled-down or pulled-up by resistors, but those resistors can't be moved (soldered/unsoldered) at every upgrade. What I'd like to do is: - at startup, if a USB cable is connected, system memory should be selected as boot memory area - a...

Hello list readers, SinelaboreRT generates clean and robust C/C++/Lua code from UML state machine diagrams. Features: - Support for...

Hello list readers, SinelaboreRT generates clean and robust C/C++/Lua code from UML state machine diagrams. Features: - Support for various UML modelling tools or built-in editor (EA, UModel, Modelio ...) - Generates clear production quality code - No run-time environment needed - Special features for high availability systems - Supports hierarchical designs - No gap between...

I need a timestamp in millisecond in linux epoch. It is a number that doesn't fit in a 32-bits number. I'm using a 32-bit MCU (STM32L4R9...)...

I need a timestamp in millisecond in linux epoch. It is a number that doesn't fit in a 32-bits number. I'm using a 32-bit MCU (STM32L4R9...) so I don't have a 64-bits hw counter. I need to create a mixed sw/hw 64-bits counter. It's very simple, I configure a 32-bits hw timer to run at 1kHz and increment an uint32_t variable in timer overflow ISR. Now I need to implement a GetTick() f...