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by Rick Kimball
Wed Mar 29, 2017 11:27 pm
Forum: Libraries & Hardware
Topic: Hints about the MMC/SD card library by Roland Riegel
Replies: 1
Views: 29

Re: Hints about the MMC/SD card library by Roland Riegel

why bother? I mean why not just buy an arduino atmega clone and just use it.
by Rick Kimball
Fri Mar 24, 2017 9:15 pm
Forum: Projects
Topic: STM32F103 minimal synth
Replies: 20
Views: 299

Re: STM32F103 minimal synth

Did you see, I used your code for the fast pin access: https://github.com/ChrisMicro/BluePillSound/blob/master/_073_SigmaDeltaTalkie/GPIOPort.h Do you want to have any special copyright text? I did see that. Once you use it you own it ; ) I just threw that code into the public domain as an example....
by Rick Kimball
Fri Mar 24, 2017 8:46 pm
Forum: Projects
Topic: STM32F103 minimal synth
Replies: 20
Views: 299

Re: STM32F103 minimal synth

ChrisMicro wrote:For sure. But that is exactly what I wanted to avoid: digging deep into the MCU.


https://github.com/ChrisMicro/AttinySou ... ndPittix.c

It seems like you did a deep dive on the attiny. Why do you want to snub the stm32f103? : )
by Rick Kimball
Fri Mar 24, 2017 8:29 pm
Forum: Projects
Topic: STM32F103 minimal synth
Replies: 20
Views: 299

Re: STM32F103 minimal synth

ChrisMicro wrote:Is it possible that not all pins can be used for PWM?


Did you notice the pins with the little squiggly line and the legend that says "PWM pin" ?
by Rick Kimball
Fri Mar 24, 2017 8:27 pm
Forum: Projects
Topic: STM32F103 minimal synth
Replies: 20
Views: 299

Re: STM32F103 minimal synth

stevestrong wrote:Isn't actually Tone lib better suited?

Isn't the tone library built using the HardwareTimer stuff? I would think using the low lever code would provide faster/more control.
by Rick Kimball
Fri Mar 24, 2017 5:19 pm
Forum: Projects
Topic: STM32F103 minimal synth
Replies: 20
Views: 299

Re: STM32F103 minimal synth

HardwareTimer is the thing you want

google search
"site:stm32duino.com HardwareTimer"
by Rick Kimball
Fri Mar 24, 2017 3:16 pm
Forum: General discussion
Topic: Analog Pin Numbering
Replies: 11
Views: 150

Re: Analog Pin Numbering

One last comment, I have seen a few posts where you suggest Roger doesn't have time and shouldn't be wasting himself on a particular topic. Shouldn't HE be the one to decide that? Roger is too much of a nice guy he rarely says "No". I think the rest of us should shield him from things bet...
by Rick Kimball
Mon Mar 20, 2017 3:16 pm
Forum: General discussion
Topic: Abnormal flash space consumption for trivial code
Replies: 4
Views: 149

Re: Abnormal flash space consumption for trivial code

I too like the singleton pattern. It seems useful to deal with order of initialization issues. I had also previously encountered this problem. However at that time, I didn't search around to find the right answer. I took the lazy way out and just moved to a different approach. That other solution th...
by Rick Kimball
Sun Mar 19, 2017 11:48 pm
Forum: General discussion
Topic: Abnormal flash space consumption for trivial code
Replies: 4
Views: 149

Re: Abnormal flash space consumption for trivial code

I noticed this, but I've not tried it: http://stackoverflow.com/questions/22985570/g-using-singleton-in-an-embedded-application <edit I tried it, it reduces the size to 13184 bytes and 2816 bytes of dynamic You need to modify the platform.txt and add the -fno-threadsafe-statics on the cpp.flags: $ g...
by Rick Kimball
Sun Mar 19, 2017 5:00 pm
Forum: General discussion
Topic: trying to understand how the compiler works...
Replies: 3
Views: 79

Re: trying to understand how the compiler works...

If I'm using a macro i tend to avoid things like post increment or addition or anything other than passing a value to it.

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