PWM in Scope

Started by Ron McDonald in Freescale DSPs17 years ago 1 reply

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...

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 have to make a call from pwmdrv.h. Thanks in advance - Chris Austin


Help with DSP56F805 PWM etc.

Started by Anonymous in Freescale DSPs17 years ago 1 reply

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...

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 currently involved on a project where I am supposed to program a DSP56F805 dev board for PWM independent con


PWM module initialization

Started by Matteo_Cardin in Freescale DSPs18 years ago 1 reply

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

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 sequence). I don't use the Motorola SDK and my initialization function is the following: void Init_PWM(


Measuring PWM with DSP56F80x

Started by Bende Georg in Freescale DSPs16 years ago 2 replies

Hello all, I'm trying to measure the duty percentage of a PWM signal in the range of 200Hz-2KHz. I configured 2 timer...

Hello all, I'm trying to measure the duty percentage of a PWM signal in the range of 200Hz-2KHz. I configured 2 timer channels in the following way: /*. Quad Timer A0 configuration ---------------------------- Count mode: Edge of 2nd source triggers pr


Code for Sine PWM?

Started by usmansari in Freescale DSPs13 years ago

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

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


ADC sync to PWM

Started by jongsooatyh in Freescale DSPs16 years ago 2 replies

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

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 do this. Motorola's embedded SDK is current working environment. Thanks. JS


8013 PWM clock rate

Started by haoyeshen in Freescale DSPs14 years ago 2 replies

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...

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 output bandwidth/resolution. I know that this has to be done by setting the PCR bit in SIM_GPS register. However, I can't find a place anywhere in the bean inspector to make such


Usage of COMPARE_AND_LOAG_REGISTER in 827 Quadtimer for PWM configuration

Started by Nitin Madhukar Yewale in Freescale DSPs17 years ago

Hi, I have configured one quad timer in variable frequency PWM mode and would like to swap it's on/off time after some time. ...

Hi, I have configured one quad timer in variable frequency PWM mode and would like to swap it's on/off time after some time. Please find attached application 56F827 in which I am using two quad timers to simulate required functionality. i.e Change the on/off time by


PWM generation using Quad timer of 827

Started by Nitin Madhukar Yewale in Freescale DSPs17 years ago 3 replies

Hi, I am using 56F827 for my project. I want to know about Quad timer. I have configured the Quad timer for PWM generation....

Hi, I am using 56F827 for my project. I want to know about Quad timer. I have configured the Quad timer for PWM generation. Please find the declaration for the same. I am using Quad Timer1 for testing but not able to see waveform using CRO probe. //10 Hz pw =


PWM Fault inputs on Motorola DSP56807

Started by William Schintler in Freescale DSPs17 years ago 1 reply

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

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? Thank you - Bill Schintler


problem with pwm..help me

Started by Mahesh Badari Narayana Gupta in Freescale DSPs14 years ago

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...

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 sendme..........   thanking you mahesh


Using PWM fault inputs as General Digital Inputs?

Started by Yochum, William in Freescale DSPs17 years ago 1 reply

Hi, This is a 56F80x issue, and it's a rather speculative question for the group. Does anyone have any comments on the...

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 inputs as extra General Purpose Digital Inputs? Has anyone ever tried this? It seems like it might p


Can PWM output be used as Output?

Started by hancicimen in Freescale DSPs18 years ago 2 replies

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...

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 more I/O. (For LCD, keypad, input and outputs etc.) As far as I understand Fault pins, current sense pins and Quadratur


PWM ADC SYNC with Assembly language

Started by christian_11_3_1977 in Freescale DSPs15 years ago

Hi everybody, I'm Italian student and I'm a new user of Motorola DSP 56805EVB. I have to synchronize PWM with ADC, and I've...

Hi everybody, I'm Italian student and I'm a new user of Motorola DSP 56805EVB. I have to synchronize PWM with ADC, and I've seen, on the Motorola manual, that TIMER C #2 must be set with "One Shot Mode" Counting Mode. It's all OK, except for the ADC Conversion


PSPWM

Started by gebrsa in Freescale DSPs11 years ago 2 replies

Hi guys, I am designing a phase shifted PWM DC/DC converter for a fuel cell. I would like to use an average current mode controller to...

Hi guys, I am designing a phase shifted PWM DC/DC converter for a fuel cell. I would like to use an average current mode controller to control the voltage out put by controlling the current using a double loop controller. I am thinking of using an analog Phase shited PWM controler IC for the current controller whose set point is generated with an external current programmer with con...


PWM to ADC sync pulse

Started by Roelof Oelofsen in Freescale DSPs17 years ago 1 reply

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...

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 samples/sec. I only want to read it at 8k samples/sec though. Is there any way that I can divide the sync pulse that come


Motor control application using DSP56F807

Started by kvnvarmain in Freescale DSPs13 years ago 2 replies

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...

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 algorithm of the BLDC motor. Actually we have developped a commutaion algorithm and it is working(not upto the mark). we have configured our PWM module for edge aligned, independent mode of operation,16Khz of PWM frequen...


RE: DSP56F80x Pwm port directly drive Leds or optoc oupler?

Started by Johnson, Jerry in Freescale DSPs17 years ago 1 reply

We are directly driving both leds and optocouplers from the PWM outputs without dificulties.

We are directly driving both leds and optocouplers from the PWM outputs without dificulties.


Which outputs can I Use?

Started by wpethe in Freescale DSPs18 years ago 1 reply

Hi, we are using a DSP56F803. Now I have a problem: We just use GPIO as I/O and PWM as simple output. Now I need more ...

Hi, we are using a DSP56F803. Now I have a problem: We just use GPIO as I/O and PWM as simple output. Now I need more output pins, setting up by software. Thanks W. pethe


interface between 3.3v and 5v

Started by in Freescale DSPs14 years ago 4 replies

hi.... i'm designing a circuit including 5v and 3.3v for the first time and need support to interact them with each other. except...

hi.... i'm designing a circuit including 5v and 3.3v for the first time and need support to interact them with each other. except dsp all circuit elements feeds from 5v. i'll drive a 2x16 lcd .. i'll read from 4 ADC input and i'll use 4 PWM signal... which buffers (easy to find) should i use? bye...