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How big is ~uint8_t?
SERIAL_RESPONSE tx_bosch (int fd, uint8_t tx_byte, RESPONSE_TYPE response) { uint8_t rx_byte; < stuff that sends tx_byte and receives rx_byte > retval = ((...
Tuesday, 23 February 2021 - 22:20
Efficient storage of and access to variable length collections of strings
I have a lot of strings in multiple languages (as a basic i18n attempt for an embedded project) and I've been playing with ways to access and store them. They are of two types;...
Thursday, 7 January 2021 - 09:03
I know nothing about bluetooth, so... <SOLVED>
This seems like a good place to ask.   What I want to do is drop an inexpensive module onto a design such that when connected to linux, windows, or mobile phone (the last is...
Wednesday, 2 December 2020 - 22:00
strcmp()
Bounced of another odd one, about which I should have known better: strcmp() where one of the two inputs is null gives, on this 64-bit Linux/GCC C system, a segfault.   It...
Thursday, 5 November 2020 - 10:29
Apropos casting...
Just as an example, and only because it slowed me down for a moment or two...   while ((uint16_t)regs.pc != next_instruction_address) { interpret_and_disassemble(); }...
Saturday, 31 October 2020 - 19:53
[Linux] what's going on here then?
Linux does not have an equivalent to the conio.h getch() and kbhit() which respectively return a single character from the keyboard and return true if a key is waiting; to get...
Friday, 18 September 2020 - 22:09
OLED display and driver package - 128 * 64
I'm out of touch with current display technology - can anyone recommend a 128 * 64 display module, about a couple of inches across? And ideally not costing twenty quid...  ...
Friday, 11 September 2020 - 20:10
Compilation with warning
Here's an odd one. I'm trying to decide whether this is a bug or not, before I take it to the IDE/compiler maker, so no names, no pack drill.   This bloody thing took me all...
Tuesday, 7 April 2020 - 19:02
I have no {} and I must scream...
I am currently trying to persuade a twenty-year-old assembler source to compile without warnings under GCC for 64-bit linux, and while I thank the original writer (it's available...
Saturday, 5 October 2019 - 08:32
Arduino Uno - interrupt on serial rx
Am I going bananas and/or missing something obvious? The limited amount of googling I have done leads me to believe that the only interrupts which can wake the processor from deep...
Saturday, 13 July 2019 - 11:31
Touch sensor weirdness...
I'm pulling my hair out over this one. I'm using a nucleo for testing, rather than an AVR, hence it's here in general electronics though it is generisable to any controller (but...
Saturday, 13 July 2019 - 09:20
Large CMOS or CCD image sensors
I'm considering replacing the eyepiece in a 6-inch newtonian reflector with an image sensor of some flavour... I've hacked up a web cam but the sensor at 1/4" is too small; the...
Sunday, 17 November 2013 - 08:09

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