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56803 PWM duty cycle sweep speed   [4 Articles]

Hi We are presently trying to use the DSP56F803 PWM (channel 4) as a simple independent PWM output. We are sweeping the output duty cycle from 0% to 100% and t...

Application brief BR1544/D   [3 Articles]

Hi all, In the motorola app. brief to design a class D amplifier, the author states that to work out the PWM value register, the following formula applies: ...

PWM vs PWMMC   [2 Articles]

I'm using 56F805 to control a number of DC controllers. The DSP is hooked up to a separate H-bridge, which receives two digital signals for direction, and one PWM for curren...

fastest PWM clock source in 56F805   [2 Articles]

It appears that the only clock source for the PWM unit is the IPBUS, which is always 1/2 the chip operating frequency (section 11.5.2). My chip is running at 80 MHz, so I ge...

How to reset PWM Counter Register on a 56F805?

Hi, I want to know when PWMEN is put to 0 does that reset the PWM Counter Register? If not, can someone have an idea on how I can reset or put a value in the P...

phase-shift pwm control with DSP   [7 Articles]

Hello I would like to inquire if anyone has attempted to implement a phase-shift PWM control for a full-bridge DC-DC converter with the built-in PWM module of ...

Use PWM D/A convertor   [4 Articles]

I am trying to develop a small application for speech signal by using dsp56f801. One of the problem i am having is how to use PWM as a D/A convertor. My understa...

PWM module initialization   [2 Articles]

Hello at all, maybe someone can help me: I have some problems with the PWM initialization (I'm not sure at 100%: sometime my IGBT is exploded during the power-on ...

DSP56F80x Pwm port directly drive Leds or optocoupler?

Hi everybody, May I use the pwm port with resistors drive the leds and/or optocouplers directly? I mean without any buffers as 74ls06 or 74ls07. The max curren...

Increase resolution for a high frequency PWM on DSP56803   [2 Articles]

Hi, Is it possible to increase the resolution for the PWM output when using it at a frequency of about 100kHz? I looked at the chapter 11 of the user's manual ...

Help with DSP56F805 PWM etc.   [2 Articles]

Please Help, I am in way over my head. All of a sudden I find myself declared the Expert on my project, this happened when I was not looking :(. I am curr...

PWM Signals

I'm looking for C code to control the PWM signal of a 56800 using a sine wave. Fredj ...

PWM   [2 Articles]

Hello, Any body got any sample code for setting up the pwm registers and controlling the duty cycle. Have been working on this for three nights and havent ha...

56F800DEMO problem with FIR Filter

Hi, I'm Mateo We are Trying to implement a FIR Filter with a 56F800DEMO Board, outputing the signal via PWM, in audio band. The timer C2 is set for 8Khz, so the ADC is sampl...

PWM signal from DSP EVM   [2 Articles]

Hi, I am using a DSP56805EVM to generate the PWM signals for a three- phase inverter. I have created a C program for open-loop V/Hz control of PWM inverter (on...

PWM in Scope   [2 Articles]

I'm using the 56f805 to generate a PWM and i'd like to know how i can get the waveform in the scope. I'm a newbie, and i don't know which variable to use, or if i h...

DSP56F807 PWM Automatic Fault Clearing

Dear All, In contradiction to the behaviour described in the User´s Manual (DSP56F801-7UM/D - Rev. 3.0, Chapter 11.5.8.2), we observe PWM outputs being re-enab...

PWM to ADC sync pulse   [2 Articles]

Good morning, I am using the PWM on the 56f807 to send out voice band signals and the ADC to sample these signals. At the moment I am sending it out at 32k sam...

Code for Sine PWM?

Hi all, I am new to DSP. Can any body help me to get Sine PWM code in 56F8013 DCS ...

audio speaker system code, need help   [2 Articles]

I am using trying to write code for an audio stereo system that samples using the onboard 12 bit a/d and then ouputs three different signals to three different pwm'...

56F8300DSK (Demo board) PWM problem.

Hello, I'm new to this forum, I recently obtained a 56F8300DSK Demo board (with a 56F8323 on board) and I have been struggling to get it up and running. I have...

ADC sync with PWM   [2 Articles]

Hi, I'm trying to use the synchronization feature of the ADC with PWM on a DSP56F805 and I don't find user manual clear on this subject. Form what I can unders...

PWM problem   [3 Articles]

hi! i am trying to learn pwm module of 56f8323 in my 56f8300 demo board. i have used pwm init. bean. here the code which generated by PE: setReg( PWMA_PMFCTL, ...

ADC sync to PWM   [3 Articles]

Hi! I am using DSP56F805. Does anybody know how to synchronize ADC to PWM sync pulse and how to generate sync pulse? I also need to know appconfig.h setup to...

PWM Fault inputs on Motorola DSP56807   [2 Articles]

Regarding the PWM fault inputs on the DSP56807, what is the minimum time duration of a positive-going pulse that will latch the fault input circuit on the chip? T...

problem with pwm..help me

hi,   i am unable to generate the pwm with motorols 50f807...can anybody tell me what are all the registers that i have to set....if you have any example code then sendm...

did i do a huge mistake????   [4 Articles]

Hi!my thesis “phase shifted dc/dc converter”. i was planning to use dsp for control circuit(instead of uc3875. working frequency 80khz and there isn’t pfc). So i ...

8013 PWM clock rate   [3 Articles]

Hi: I am developing a software using 8013 by using the CodeWarrior 7.2. I need to set the PWM clock rate to 3 times of the system clock in order to increase the ou...

Mysterious ADC problem ! (DSP56f807)   [2 Articles]

Hi Everybody :) I am new to the motoroladsp yahoogroup.   I have an annoying problem with the ADC of the DSP56f807.   ...

Re: Use PWMA pin as Output???

Hi, You can use the PWM Output Control Register (PMOUT). It's the simplest way I found. It's also called softway control. first : You must enable (set) the out...

DSP56F807: Synchronization of on chip ADC to PWM

I'm trying to synchronize the ADC's (both A and B) to the PWM, as described in Mot. app. note AN1933/D, section 5.2. I am using center-aligned PWM technique (Fig. 5...

Can PWM output be used as Output?   [3 Articles]

We plan use 56F803 and 807 in our applications. I just wonder if we can use PWM outputs as standart Output? Since the I/O is very limited with 56F803 we need mor...

Complimentary PWM channel state in 56F8013 during JTAG download   [2 Articles]

Hi, Iam developing a motor control application using 56F8013.Iam using the complimentary PWM chanels of this processor driving a buffer. Whenever iam using the JTAG to p...

Using PWM fault inputs as General Digital Inputs?   [2 Articles]

Hi, This is a 56F80x issue, and it's a rather speculative question for the group. Does anyone have any comments on the feasibility of re-using the PWM fault...

Motor control application using DSP56F807   [3 Articles]

Hi i am working on a motor control application using DSP56F807.We are developping an algorithm for position control of BLDC motor.I am facing a problem in the commutaion algori...

Errors-DSP56F807EVM   [2 Articles]

Hi, While building any example project (adc, pwm etc in DSP56F807EVM) I m getting following errors. ========================================= Can't write ...

Re: Interrupt undefined in flash memory.

Good morning, Motorola had a presentation here a month ago and this is the link that I have received from them: The helpline address is I have not tried thi...

Calculation for PWM using 827   [2 Articles]

Hi, I am using 827 processor for my application. Core freq is 80Mhz so peripheral freq is 40Mhz. I want to generate PWM (under variable freq PWM mode) of 10 Hz fr...

Re: CW Bugs

>From: "Jacob" <> >Reply-To: <> >To: <> >CC: <> >Subject: [motoroladsp] CW Bugs >Date: Fri, 6 Dec 2002 08:38:08 -0800 > > It also seem...

56f807 + SDK + ucos

Hi, I'm developing an application on the 56f807 with SDK and ucos II. The application is running very well. But when it runs during a long time, all the interr...