extern "C" uint32_t set_arm_clock(uint32_t frequency);
void setup() {
set_arm_clock( 912000000 );
}
...you will notice, it shuts down due to "Temperature panic" after a some time.
The question is, how to fix that.
Fix the documentation only?
+fix the names in the sourcecode, but with the current behaviour?
Or fix the bug - that would mean to break old things.
I'm not sure where this GPIO comes from.. its noted as a feature of the PIO statemachine. No mention of GPIO.
I don't know if that counts as software, and it says nothing about jitter. But I know it's not cool ;)
...
..with "TeensyPie" ;)
Here is the bootrom: https://github.com/raspberrypi/pico-bootrom
They have an impressive list of examples already: https://github.com/raspberrypi/pico-examples
I see no encyption, too, but that does not mean that they can't add it in a future revision.
And maybe there are MCUs with encryption in the pipeline (or already available?), for industrial use.
RP2040, where the 0...
If their marketing will be as good as for Respber Pi #1,
it will not just be a SAMD killer, it probably will be a Arduino killer.. the pushiment for standstill.
The API looks very good and easy to use, and then,...
Yup, was about to write the same :)
The PIO is quite interesting.
But at the end of the day it's just a replacement for real devices - and there are only two PIOs.
From their examples, an I2C Scanner:
// These are any addresses of the form 000 0xxx or 111 1xxx
bool reserved_addr(uint8_t addr) {
return (addr & 0x78) == 0 || (addr & 0x78) == 0x78;
}
int main() {
...
@Paul: Maybe we should create an API for the 1176, that is compatible to this thingy.
.."Run your Pico programs with 1GHZ" :)
Or just now for T4.x?
Its early. The documented API is not that big. That will...
Marketing. Economy.
We will see better models someday.
Users will buy the better model. So they buy two, then.
Then the next model. etc etc etc.
You have to get customers hooked. With a simple to use thingy.
Of...
..any you may alos want to look at pulseClock with just uses a "nop"
#define pulseClock cbi(P_SCK, B_SCK); asm ("nop"); sbi(P_SCK, B_SCK)
That's way too fast, I think.
Maybe just edit the cbi and sbi macros and...
Thanks! Typo fixed, and outputs added.
I won't add links to products or breakouts.
Or what do you think?
Some PDM(/TDM??) microphones are missing.. haven't used them
I have started to make a list of supported chips / boards.
I do not think that it is complete.
Maybe we can expand it together?
If you don't feel comfortable editing in the wiki, you can also post here, I'll expand...
Can you measure the voltage there? (Without your wire connected)
Take a look at the Teensy schematic. Vin (on the board it's called "5V") is directly connected to USB. So you connect the PSU with your Dell, if you use...
Thank you Pauls
The AD is 1MSPS.
That was known back in january.
I've seen to late that you'd need 10MSPS.That is too much, I don't believe that you can overclock it that much.
@Pauls: Thank you - fixed, I hope?
@Deane: If you want the whole procedure exactly as shown in your picture, it gets a little more complicated.. I don't see that you can program that.. This is not meant in a derogatory...
Ok, the 2nd puls (code from Post #8) might be little too fast-.. maybe try it.
If it does not work, we'll see how to make it a little bit longer.
Edit: There is a gap between both pulses. Seeing Post#12, that gap...
The for (;;) is a loop (inside the loop())
It is there to prevent that additional things are calld (not visible in your program - teensyduino adds them, invisible)
SO...no...it runs !faster! with for(;;)
Edit:...
That's right. You should disconnect it. If the voltage comes from external.
Are the wires OK? I had more than once problems with faulty, cheap china wires..
If you have a DVM you can test if the pins on the 74 have...
1) It does not work to just plug the pins into the teensy.
They give no - or very bad - contact.
You need to solder them.
I see no solder on 3 (or is it 5?) Volt +
If hope not both, USB AND external 5V are...
Valid argument!
Nothing of this would be impossible by just an other blink that gets executed by Python or whatever.
It would be *preloaded* only. Removing it would be exactly the same as overwriting the...
Form the pure technical standpoint maybe yes.
Try to find a youtube influencer that promotes it :) Doesn't it use the reverse polish notation (Or do I remember wrong)? "(A+ B) * C " is "A B + C *" ?
I'm afraid,...
Yes, I remember there were articles in some magazines, including ELEKTOR about using CMOS memories as camera.
It is, however, interesting how good a simple LED works as sensor.
Not sure.. if this is what you want?
const int ledPin = 13;
const int fastPin = 14;
const int fasterPin = 15; //added
const int ns = 78;
void setup() {
pinMode(ledPin, OUTPUT);
RE: Oversampling: I see no reason why it should not work with other Chips, too.
But it would need even more switches or output-objects... so ... maybe it's better to just keep it simple?!?
If we want to clean these...
So, real question : Is there a way to use the builtin LED on pin13? I suspect, not, because we can't charge the capacitance? Or is there maybe any other effect that can be measured?
No you can use any pin.
Important is just the direction of the LED. You need to swap "+" and "-" measure the capacitance this way. The "capacitor" discharges slower or faster depending on the amount of light.
The...
... ok.. I guess it was too easy.. again... my last question of this kind (turn speakers on) was answered in record time, too :-(
const unsigned p1 = 17; // LED-Anode
const unsigned p2 = 16; // LED-Kathode
...
I'm afraid currently there is no good solution for more than 16MB RAM.
One could come up with the idea of simply using multiple (more than 2) PSRAMs on QSPI. But that's difficult because they would need multiple...
You can add this functionality to your program.
Thats even better than to have it in the PJRC-bootloader (and other people may not want it)
You just have to make sure, that this part is íncluded to the program on SD,...
Oh, I think it's not too difficult to write some code that loads a program from SD to RAM and executes it there. Might involve reserving some space in ITCM (via .ld file), some stack tricks, fiddling with the...
Did not "crush it down". Just said that I think that it is not really needed. There are TODOs with much higher priority.
Can Raspi do what Teensy can? :) Work without SD? :) Boot in a few milliseconds?
That's a...
Please use code-tags when posting code.
How do you measure this?
I had problems getting my cheap scope to trigger with your code.
I think you just did'nt see the pulses.
The code below works better:
Don't...
Sorry too late here - almost midnight - have to work tomorrow.
Again - this is a shot into the blue. I don't know if it is the problem - but for me, it seems not too unlikely.
I can be totally wrong, of course.
...
Don't know...
And I can't find the old thread :-(
I remember the SD Spec says, the pullups are required. I guess the controller thinks they are there...
The patch was a workaround. And it took me a long time to...
The reason for this is patch is a bit complicated.. If the connections have no pullup, they can toggle when the interface pauses. Maybe beacuse lines in the near toggle.
The chance that this happens may increase when...
Yes the same thing happens.
Maybe it's the same problem as here: https://github.com/PaulStoffregen/SD/commit/cea34a24d81072ba91e47331cea9176826a6cfae
SOmbody has to take a look... don't know if the SD Controller...
Yes and there are more examples.
I think it can be useful for bit-banging, too, sometimes.
Just in cases where you need to control the exact timing.
However, that's not often the case.
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