Search found 1690 matches
- Sat Dec 21, 2019 5:47 am
- Forum: Ideas & suggestions
- Topic: usb-uart example sketch and some thoughts about uart
- Replies: 6
- Views: 16669
Re: usb-uart example sketch and some thoughts about uart
thanks ray, in the case of my sketch, it is just a convenience feature i used while i'm testing out the features of esp8266 AT rom. my serial terminal is kind of 'handicapped' no macros etc, so i exploit the convenience of the sketch and did a 'command processor' ;) btw i still think the usb macroce...
- Fri Dec 20, 2019 6:06 pm
- Forum: General discussion
- Topic: [Help] stm32f103 TFBGA bootloader flashing
- Replies: 2
- Views: 7373
Re: [Help] stm32f103 TFBGA bootloader flashing
check if you are accidentally installing something in ram? flash address normally is 0x8000000
- Fri Dec 20, 2019 4:04 pm
- Forum: General discussion
- Topic: dhrystone and whetstone benchmarks
- Replies: 93
- Views: 67313
Re: dhrystone and whetstone benchmarks
+1 Thanks !
- Fri Dec 20, 2019 3:43 pm
- Forum: General discussion
- Topic: dhrystone and whetstone benchmarks
- Replies: 93
- Views: 67313
dhrystone and whetstone benchmarks
this is an old favorite topic in the old forum
uploaded again, seasons greetings
uploaded again, seasons greetings
- Fri Dec 20, 2019 3:20 pm
- Forum: Custom design boards
- Topic: Bluepill F4 board, anyone still working on it?
- Replies: 83
- Views: 69229
Re: Bluepill F4 board, anyone still working on it?
ok finally i ordered a couple f401, cos it seem like 'everyone else has it' :lol: the f411 seem to have SD hardware support, f401 nil f4* and even f303cc doesn't feel the same as the stm32f103, they are faster even for the same clock speed according to the flyer, and specs it has that ART accelerato...
- Fri Dec 20, 2019 12:42 pm
- Forum: Forum rules, FAQs and HowTo's
- Topic: Limit on attachment image sizes?
- Replies: 7
- Views: 15495
Re: Limit on attachment image sizes?
i've occasionally used imgur https://imgur.com/ but i'm not sure how long the images would be retained there. so those images may 'disappear' after a while. slighly larger sizes say < 200k would probably help, my guess is compression can mostly fit many in but there would still be many that exceed t...
- Fri Dec 20, 2019 12:03 pm
- Forum: General discussion
- Topic: Weird HardwareTimer behavior
- Replies: 8
- Views: 7120
Re: Weird HardwareTimer behavior
one way though is to explore dma https://www.st.com/content/ccc/resource/technical/document/application_note/group0/91/01/84/3f/7c/67/41/3f/DM00236305/files/DM00236305.pdf/jcr:content/translations/en.DM00236305.pdf chapter 5 Arbitrary waveform generation using timer DMA-burst feature and this is pro...
- Fri Dec 20, 2019 10:17 am
- Forum: General discussion
- Topic: Weird HardwareTimer behavior
- Replies: 8
- Views: 7120
Re: Weird HardwareTimer behavior
well, it means your timer is generating the interrupts as you expect, so if you expect your timer to say run at 100khz that would be 100k interrupts per sec + 1000 interrupts from systick. so say if you increase the loop count to say 101000 / 2 and split the intervals between led on - led off it wou...
- Fri Dec 20, 2019 9:21 am
- Forum: General discussion
- Topic: Weird HardwareTimer behavior
- Replies: 8
- Views: 7120
Re: Weird HardwareTimer behavior
my guess is one could check if other interrupts (e.g. usb sof every 1ms and systick every 1ms used for delay(n) ) could be occuring. one of those tricks i do is place asm("wfi"); in loop(), that is nearly the same as delay(1) and have an variable, counter checking the number of "wfi&q...
- Fri Dec 20, 2019 7:45 am
- Forum: General discussion
- Topic: DDRX function on STM32
- Replies: 7
- Views: 18701
Re: DDRX function on STM32
not too familiar with avr's too but DDRx registers basically gives the direction of a pin being input or output? http://maxembedded.com/2011/06/port-operations-in-avr/ i'd guess the arduino api pinMode(pin,mode) gives similar functionality, e.g. pinMode(pin, INPUT) and pinMode(pin, OUTPUT) , probabl...