Search found 1260 matches

by zmemw16
Sat Jul 22, 2017 6:12 pm
Forum: Projects
Topic: Need advice: Metal detector with stm32f103
Replies: 48
Views: 2171

Re: Need advice: Metal detector with stm32f103

@asen0v Pin 3 goes to ground. This LCD requires negative voltage to control the contrast. It looks OK when connected to the ground. On the picture it looks terrible, but it is because of the camera. Top can you post a link to that lcd ? i have only encountered a negative voltage requirement for a 20...
by zmemw16
Sat Jul 22, 2017 12:12 pm
Forum: Libraries & Hardware
Topic: Use STM32F103C8 with TFT 320QVT 9341
Replies: 19
Views: 368

Re: Use STM32F103C8 with TFT 320QVT 9341

why am i seeing echos around here ? yesterday or day before it was software serial and hardware serial questions... ... ... please just open a new topic in a relevant forum and not post to any threads mentioning something or other about your issue. have you tried a search, maybe for 'qvt' gives this...
by zmemw16
Sat Jul 22, 2017 12:04 pm
Forum: Projects
Topic: Need advice: Metal detector with stm32f103
Replies: 48
Views: 2171

Re: Need advice: Metal detector with stm32f103

you've beaten me to it, so looks like standard 4bit setup you've disturbed pin 3 in some way. what is it wired to, normally its a pot, i suspect you've got it going to a pin for maybe pwm ?? 5 black blocks and the rest blanks has to be incorrect contrast voltage change your test for the display to w...
by zmemw16
Sat Jul 22, 2017 9:59 am
Forum: Builds and Announcements
Topic: Combined bootloader and sketch
Replies: 5
Views: 49

Re: Combined bootloader and sketch

is this an example for cat ? if foo.hex and bar.hex are generated from sketches surely the addresses involved will clash and then as i don't know the result of flashing it, is indeterminate (for me)
stephen
by zmemw16
Sat Jul 22, 2017 9:44 am
Forum: Projects
Topic: Need advice: Metal detector with stm32f103
Replies: 48
Views: 2171

Re: Need advice: Metal detector with stm32f103

how did you program it originally ?
have you a link to it as a project ?

testing the display, literally just the lcd transplanted to a nano already wired for the display?

black blocks and blanks to me suggests the contrast control, did you use a pot ?

stephen
by zmemw16
Sat Jul 22, 2017 8:18 am
Forum: Projects
Topic: Need advice: Metal detector with stm32f103
Replies: 48
Views: 2171

Re: Need advice: Metal detector with stm32f103

any signs of leakage? battery flat ? what doesn't work, the whole thing, the stm32 or the display(not clear if its that you tested with the nano) ? does blink work ? maybe you left a blink the led function in the code ? ok you can't see it, but its only a few mA's. to the tone generator for the next...
by zmemw16
Fri Jul 21, 2017 4:57 pm
Forum: General discussion
Topic: Getting started with the STM32 microcontroller - STM32F103C8T6 via Arduino
Replies: 3
Views: 72

Re: Getting started with the STM32 microcontroller - STM32F103C8T6 via Arduino

agreed, nice looking video, it does illustrate brilliantly why i like stlink, even ignoring its potential for debug, 'move top link' sequence as a dance step, quick, quick, slow :( look at his 'why am i switching to atmel studio' video. form your own opinion. how long did people here take to rapidly...
by zmemw16
Fri Jul 21, 2017 6:59 am
Forum: Projects
Topic: STEP GPS LOGGER, GPS CLOCK, Bicycle computer and more
Replies: 8
Views: 194

Re: STEP GPS LOGGER, GPS CLOCK, Bicycle computer and more

using multiple satellite 'systems' in a gps is definitely going push the price up, determining the best guess solution would also add another markup :)
by zmemw16
Thu Jul 20, 2017 3:55 pm
Forum: Projects
Topic: STEP GPS LOGGER, GPS CLOCK, Bicycle computer and more
Replies: 8
Views: 194

Re: STEP GPS LOGGER and more

i put 'military gps resolution' into google, first is The United States government currently claims 4 meter RMS (7.8 meter 95% Confidence Interval) horizontal accuracy for civilian (SPS) GPS. Vertical accuracy is worse. Mind you, that's the minimum. Some devices/locations reliably (95% of the time o...
by zmemw16
Thu Jul 20, 2017 4:53 am
Forum: General discussion
Topic: Using USART1 PA11 and PA12
Replies: 2
Views: 56

Re: Using USART1 PA11 and PA12

PA9 TX
PA10 RX
datasheet has the pinouts, also most schematics
try searching forum for USART1 or Serial1
i use PA9/PA10, also PA2/PA3 with almost "by default" regularity
with a #define mySerial Serialx line, you can just use mySerial consistently and change with one edit and moving 2 wires.
stephen