Touchpanel I/O

Started by Don Y in comp.arch.embedded3 days ago 3 replies

I am amazed at how commonplace this is becoming -- and how shortsighted the implementations! Have YOU considered how a user CLEANS the...

I am amazed at how commonplace this is becoming -- and how shortsighted the implementations! Have YOU considered how a user CLEANS the panel? If the device can be turned OFF, then they could resort to that avenue to ensure cleaning actions aren't interpreted as "commands". But, if it *can't* be (or, if the user decides they want to clean the panel NOW -- for whatever reason), then yo...


Boxed MCU with RS-232 Port

Started by Rick C in comp.arch.embedded4 days ago 54 replies

The unit only really needs one serial port, but it is more convenient to have two connectors, so I guess it needs to ports. One port will only...

The unit only really needs one serial port, but it is more convenient to have two connectors, so I guess it needs to ports. One port will only receive and the other only transmit, no handshaking. The function is pretty simple. A sensor sends a line of about 50 chars, at 9,600 bps, once per second. This box counts 20 lines and adds a header. So nothing fancy is required of the MCU. There ...


Another STM32F103 clone?

Started by Anonymous in comp.arch.embedded1 week ago 19 replies

I have bought few Blue Pills on Aliexpress. I expected to receive boards with some of known clones. But what I get does not look like any...

I have bought few Blue Pills on Aliexpress. I expected to receive boards with some of known clones. But what I get does not look like any clone that I have heard of: - Cortex M4 with no FPU - 32k RAM - 128k flash - set of devices like STM32F103C8T6 Chip seems to be resonable compatible, but I noticed notable difference in I2C peripherial: bit 14 in OAR1 (own address register 1) se...


Air32F103/MH32F103

Started by Anonymous in comp.arch.embedded1 week ago

There is another STM clone on the market. Namely, one can buy board with chip marked Air32F103. Internet says that this is rebranded MH32F103....

There is another STM clone on the market. Namely, one can buy board with chip marked Air32F103. Internet says that this is rebranded MH32F103. There is datasheet in Chinese which says that there are 5 variants of MH32F103, smallest one with 32kB RAM and 128kB flash (that is what is sold as Air32F103) but there are bigger with RAM going up to 96kB and flash up to 1MB. I got Blue Pills whi...


DSP like MCUs, or MCU like DSPs?

Started by Rick C in comp.arch.embedded1 week ago 17 replies

I don't recall the TI designator, but they make some DSP parts that have peripherals like MCUs. I know that some time back, ARM made a push into...

I don't recall the TI designator, but they make some DSP parts that have peripherals like MCUs. I know that some time back, ARM made a push into DSP territory by adding some DSPish instructions to I believe it was the CM3 devices, or maybe CM4. Anyone here use these crossover devices? What sort of apps? Why did you pick that device over others? -- Rick C. - Get 1,000 miles of fr...


Ada-Europe Conference - 13 Feb Journal-Track Extended Deadline

Started by Dirk Craeynest in comp.arch.embedded3 weeks ago

----------------------------------------------------------------------- UPDATED Call for Contributions ...

----------------------------------------------------------------------- UPDATED Call for Contributions 27th Ada-Europe International Conference on Reliable Software Technologies (AEiC 2023) 13-16 June 2023, Lisbon, Portugal www.ada-europe.org/conference2023 *** Journal-track deadline EXTEN...


newlib and time()

Started by pozz in comp.arch.embedded3 weeks ago 22 replies

I often use newlib standard C libraries with gcc toolchain for Cortex-M platforms. It sometimes happens I need to manage calendar time: seconds...

I often use newlib standard C libraries with gcc toolchain for Cortex-M platforms. It sometimes happens I need to manage calendar time: seconds from 1970 or broken down time. And it sometimes happens I need to manage timezone too, because the time reference comes from NTP (that is UTC). newlib as expected defines a time() function that calls a syscall function _gettimeofday(). It should...


Camera interfaces

Started by Don Y in comp.arch.embedded4 weeks ago 37 replies

ISTR playing with de-encapsulated DRAMs as image sensors back in school (DRAM being relatively new technology, then). But, most cameras seem...

ISTR playing with de-encapsulated DRAMs as image sensors back in school (DRAM being relatively new technology, then). But, most cameras seem to have (bit- or word-) serial interfaces nowadays. Are there any (mainstream/high volume) devices that "look" like a chunk of memory, in their native form?


(PDF) Biochemical, Immunological and Epidemiological Analysis by Bandyopadhyay

Started by Serena Pascal in comp.arch.embedded4 weeks ago

(PDF) Biochemical, Immunological and Epidemiological Analysis by...

(PDF) Biochemical, Immunological and Epidemiological Analysis by Bandyopadhyay https://booksca.ca/library/pdf-biochemical-immunological-and-epidemiological-analysis-by-bandyop adhyay/


Cortex-M buses

Started by Anonymous in comp.arch.embedded4 weeks ago

I want to understand impact of buses/wait states on Cortex-M preformance. It seems that documentation about this seem to be scatterd or...

I want to understand impact of buses/wait states on Cortex-M preformance. It seems that documentation about this seem to be scatterd or unavailable (I would appreciate pointers to appropriate documentation). I was unable to find answers in documentation so I did some testing. Below part of my results. I run tests on STM32F030, STM32F103, STM32F407, STM32411 and two chinese clones, namly ...


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