I have tried to find examples for the specific microprocessor, but there seems to be very little. But this seems geared specifically to XPlained boards and not D09 specifically. I'm not sure how D09 differs from, e. It is a steady 9. I do not see that the peripheral mask register is set to enable the clock to the timer.
This may be done behind the scenes in ASF. They are provided here to keep everything in one file. Lars, Thank you so much. This was my problem indeed. Wonderful area.
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Level: Posting Freak. Posts: View posts. Sep 9, - PM. I do not use ASF, so the following may be no help. Edit: Datasheet page 75 : A clock from the Generic Clock Generator must be configured to use one of the running clock sources, and the generator must be enabled. The generic clock, through the Generic Clock Multiplexer, that connects to the peripheral needs to be configured with a running clock from the Generic Clock Generator, and the generic clock must be enabled.
The user interface of the peripheral needs to be unmasked in the PM.Atmel Start docs totally useless for me.
Pulse-Width Modulation with the SAM4S Xplained Pro
Thanks indeed. I've managed to understand the parameters and i've also managed to solve the issue of moving in the two directions inverting the output channels. Unfortunately access to registers is needed as the PWM implementation is really really basic. Not even apparently in my understanding allowing the usage different channels or 8 bit register option. Can you explain me the meaning of each configuration please?
If you want to write your own driver, then the data sheet holds the information. That link might be quite volatile. It is documented here. The ASF4 documentation might not make you jump with joy, but it exists. It's hard to understand what you're actually asking about here. For each of those you can set how it's respective WO and WO channels are routed to output pins. Not entirely certain of this working, since I have not played with the TCCs yet.
I am assuming we're talking about SAM D21, since that is what this thread started out being about. You probably should have started a new thread rather than hijacking an old thread. As of January 15,Site fix-up work has begun! Now do your part and report any bugs or deficiencies here. Use the wrong words, communicate the wrong concept. Hi can anyone help me to fix the bug. But how do you think:. You haven't said which chip this is so it's difficult to be more specific but here's an example plucked completely at random:.
On the whole you don't get to pick and you have no control over this - if you planned to use timer1 channel B for example you would have to connect your LED to pin BTW I've noticed you tend to tag your posts onto the end of other people's thread. That's fine if it's a direct continuation of the previous discussion but otherwise it is "hijacking" - probably better to start a new thread.
Also don't assume everyone already knows the details of your setup so remember to include key details like which model of micro it is and how fast it is being clocked, etc. Note that the number at the top right of each post - eg, 6 - is a link to that particular post. So you can use that to reference a particular post within a thread.
Skip to main content.I am using Atmel Studio 7 Version 7. I am trying to set up my peripherals in my project uisng the Atmel Start tab accessed by right clicking on the project and clicking on Re-Configure Atmel start project. However setting up a PWM output is failing. After this there is a new project called PWM Example.
I am not good enough at programming to track down the and fix the problems caused by this naming convention mis-match, but maybe someone can tell me how to fix up this example project to get the PWM pin to toggle? After working on this myself on and off for 3 weeks, there are a few answers to my own question.
Now TC0 will have a clock. What this auto generated code does however is mostly configure the PWM port except for the mismatch in clock source described above. After that unlock the control registers, write PWM values to registers A and C, then kick the port with a sync command. Skip to main content. Log in or register to post comments.
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Quartz or resonator oscillators: 3 to 20 MHz main and optional low power Debug access to all memories and registers in the system, including Cortex-M4 register bank when the core is running, halted, or held in reset.
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Package Type. Temp Range. Packing Media. Only show products with samples.Good evening, finally things are starting to make some sense, I still find the ASF documentation very, very lacking, there are no examples that don't involve loading an example project or going after the files.
I can't really find much in the datasheet, nor in the ASF, and there is no example in the ASF that doesn't use callbacks and whatnot, there is no clean simple PWM exampe, that I have found that is.
Have you tried reading the ASF manual on Atmel website under application notes. It is amazingly simple to understand. By far the best documentation I've found. If only there was the same documentation for non ASF projects. They certainly list all the functions, and describe each function in isolation - but what they are very bad at is explaining how to use them. But in the pdf manual it gives code to literally "paste this in to your main". And that is what is also available in the AtmelStudio, no more documentation that reading.
Doxygen crap that lists functions, I might be missing the elephant in the room, and if so I'm sorry for wasting your time, but the R21 micro seems very badly documented. Skip to main content. Log in or register to post comments. Go To Last Post. Level: Hangaround. Posts: View posts. Posted by keepcool : Thu. Jul 30, - PM. Fivestar widget 1 2 3 4 5.
Best regards. Last Edited: Thu.This article is intended to build upon a recent two-article series that explored the technique whereby digital-to-analog conversion is achieved by low-pass filtering a pulse-width-modulated signal.
Click here for Part 1and here for Part 2. Actually, though, for this project the extension boards are a convenience, not a necessity; if all you have is the SAM4S board, you can rig up low-pass circuitry with a breadboard or something.
Before we can turn a PWM signal into a digitally controlled analog voltage, we need to generate a PWM signal, and in my opinion, this is not as straightforward as one might expect. It seems to me that the PWM portion of the Atmel Software Framework ASF is somewhat poorly documented, and there are various little details you need to get right before you actually see the expected PWM waveform on the expected pin.
Thus, we will devote the rest of this article to mastering the PWM interface, and in the next article, we will incorporate the DAC functionality. The SAM4S Xplained Pro user guide tells us that two of these signals are included in the standard extension header pinout:.
If we look at the pinout for EXT1, we see that pin 7 gives us the positive i. At this point we have enough information for the first of these:. Each pin can be connected to up to four peripheral signals; these are referred to as peripheral A, B, C, and D. Table page of the SAM4S series datasheet tells us which of the four we need:.
The next thing we need to do is configure the clock that will drive the PWM hardware. The PWM module supports two clocks derived from programmable dividers referred to as A and Bbut we only need one, so we will disable clock B.
The first step in the clock configuration process is to enable the peripheral clock for the PWM hardware:. Note that the relevant timing characteristics are displayed on the right side of the scope captures. Give this project a try for yourself! Get the BOM. Thanks for the description. I know I would have been hung up on that for a while. Don't have an AAC account? Create one now. Forgot your password?Blinking LED on Atmel SAM D21 Xplained Pro - Tutorial
Click here. Latest Projects Education.Copying the code and replacing the pin name does not work, even if I replace everything with a new PWM channel and the registers and everything. This is the config setup by your code here:. If you use the ASF ver 3 examples then that kind of setup is done for the xplained pro board inside init. I am having the same problem. In the code, all I see is:. Where can I find the darn pin assignment, and change it?
You can't really assume everyone knows what example this is. How did you create the example? If your example, e. I wish there were example programs that just listed the register usage in a very plain. Set the pin direction, set the pin level, set the multiplexing Skip to main content. Log in or register to post comments. Go To Last Post. Level: Rookie. Posts: 25 View posts.
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