How to use the two compare registers at same time?

Started by zhgmouser in Freescale DSPs15 years ago

hello, everybody. I have a question about compare registers of DSP56F805. There are four Quad Timers with four channels. Each...

hello, everybody. I have a question about compare registers of DSP56F805. There are four Quad Timers with four channels. Each Timer has two compare registers. The method that The dual Compare registers (CMP1 & CMP2) provide a bi-directional modulo count capability was intr


56F827 ADC SYNC

Started by Papa__J in Freescale DSPs17 years ago 2 replies

I have been unable to find much information regarding the connection of the quad timer modual to the ADC sync input in the 826/827...

I have been unable to find much information regarding the connection of the quad timer modual to the ADC sync input in the 826/827 users manual. Specificaly, I was trying to discover if an exernal source could be used to trigger the ADC SYNC (I don't think so). Also, is this SYNC alw


Ynt: Can PWM output be used as Output?

Started by Han Cicimen in Freescale DSPs17 years ago

Thanks for the help. I have SDK version 2.4. I think I have to order 2.4.1. 1. Can we use fault and current sense inputs as...

Thanks for the help. I have SDK version 2.4. I think I have to order 2.4.1. 1. Can we use fault and current sense inputs as normal input? 2. As far as I know we can use quadrature decoder inputs as normal inputs. 3. Can we use quad timer inputs as normal inputs?


dsp56000 assembler guide

Started by Andrew Shelkovenko in Freescale DSPs16 years ago 3 replies

Hello, All! I just got DSP56F807EVM.. I have some questions.. 1. From where I can download full dsp56000 assembler guide? ...

Hello, All! I just got DSP56F807EVM.. I have some questions.. 1. From where I can download full dsp56000 assembler guide? 2. How can I read (view in debug watch) quad decoder (or any) register contents? QDec -some decoder register address .


ADC sync with PWM

Started by Bruno Tremblay in Freescale DSPs16 years ago 1 reply

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...

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 understand, the PWM outputs a synchronization pulse connected as an input to the quad timer module C, input of TC2 at each r


Quad Timer Input Question

Started by Pete Becher in Freescale DSPs17 years ago

Hi, Has it always been the case where in order to see the input bit for a given timer channel that the Secondary Count Source...

Hi, Has it always been the case where in order to see the input bit for a given timer channel that the Secondary Count Source has to be set to the counter channel number that is being used? I am just polling the input bit on timer D channel 3 to synchronize to an


Capture signal period w/ 5680x timer

Started by Steve Glow in Freescale DSPs16 years ago 1 reply

I'm trying to use a quad timer block to capture the period of an encoder input for velocity calculation. The problem I'm having is...

I'm trying to use a quad timer block to capture the period of an encoder input for velocity calculation. The problem I'm having is that the input period is quite small and frequent, so I really don't want to service an interrupt as part of the capture. One problem I'm having i


Measuring PW using Quad Timer Captures

Started by dflieb20 in Freescale DSPs17 years ago 2 replies

Hello- I am using the 56807 with the Motorola SDK. I am tryng to measure the pulse-width of a ~50Hz squarewave using the...

Hello- I am using the 56807 with the Motorola SDK. I am tryng to measure the pulse-width of a ~50Hz squarewave using the capture registers on two timers (one to save the rise time, one to save the fall time). The rise and fall interrupts fire correctly, but the values returned


Quad timers and Auxilary timers provided by SDK timer driver

Started by Nitin Madhukar Yewale in Freescale DSPs17 years ago 2 replies

Hi , I am using 56F827 in my project. I have gone through the documentation of SDK Programmer's Guide and found that SDK...

Hi , I am using 56F827 in my project. I have gone through the documentation of SDK Programmer's Guide and found that SDK provides API for Timer Services. [Section 5.1.15]. It says SDK driver can provide 7 auxilary timers and TOD. I am using 3 Quadtimers and


Frequency meter to meas square wave signal

Started by Anonymous in Freescale DSPs17 years ago 1 reply

Hi, everyone does anyone already developed a frequency meter to meas square wave signal with range from 1Hz to 100Hz using "Quad...

Hi, everyone does anyone already developed a frequency meter to meas square wave signal with range from 1Hz to 100Hz using "Quad Timer Module" in DSP56805? Thanks in advance Marco


Quad timer in Cascaded count Mode

Started by shridharjoshi2000 in Freescale DSPs15 years ago

hi all, i am trying to implement a 32 bit syncronous counter using timer D module of dsp56f801a60, timer 2 and timer3...

hi all, i am trying to implement a 32 bit syncronous counter using timer D module of dsp56f801a60, timer 2 and timer3 configured as follows timer2 **************** count mode= gated count mode , primary input source=timer2 input pin (13MHz) Secon


Quad timer initialization to generate interrupt on/off time (CMP1/CMP2)

Started by Nitin Madhukar Yewale in Freescale DSPs17 years ago 1 reply

Hi, I am using 56F827 for my project. I want to generate pulse of 160Hz and width i.e. on time is 0.0015 seconds. To generate the...

Hi, I am using 56F827 for my project. I want to generate pulse of 160Hz and width i.e. on time is 0.0015 seconds. To generate the required pulse I have initialized "qt_sState" structure In the following manner. 827 Freq is 80Mhz so peripheral freq is 40Mhz. // 160 Hz


Prescaler vs. Counter output pin as the primary source

Started by Hardeep in Freescale DSPs14 years ago 1 reply

Hi, I am using the DSP56858. This question relates to the Quad Timers. What is the difference between a prescaler as a primary...

Hi, I am using the DSP56858. This question relates to the Quad Timers. What is the difference between a prescaler as a primary source and using a counter ouput pin as a primary source? On Timer3, I am generating a clock pulse which uses a prescaler as the primary source and then toggles the OFLAG output on successful compare.