This version (22 Jun 2012 19:33) was approved by William Jahn.The Previously approved version (22 Jun 2012 17:49) is available.
Pulse Counter
Click here to return to the Counters page
| The Pulse Counter block, counts the number of non-zero inputs it receives. There is a start/stop pin to initiate and pause the count, and also a reset pin to set the count back to zero. Any non-zero input on the pulse input pin, is considered a pulse and will be counted when the count is enabled. |  |
Input Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Start/Stop | int - control | When this pin is high, the algorithm is counting the Pulse input. When it is low, the algorithm holds the last count value |
| Pin 1: Reset | int - control | When this pin is high, it clears the count value back to zero. |
| Pin 2: Pulse Input | int - control | Input signal to monitor and count pulses |
Output Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Count Output | int - control | Count Value indicating number of pulses |
Algorithm Description
The purpose of the Pulse counter, is to count the number of pulses during a specified amount of time. The time is dictated by the signal on the start/stop pin. When the start/stop pin is high, the algorithm is counting pulses, otherwise the last count value is output. The reset pin clears the count value and counting can resume from 0 whenever the start pin is high.
The graph below shows the interaction between the start/stop and reset pins when a pulse train signal is present on the Pulse Input pin. The reset signal is in red. The start/stop signal is in blue, and the counter output is the second graph in yellow.
Example
The Pulse Counter is very useful to use with the Value Cross Detection algorithm. For an application in which you need to monitor the number of value-crossings (zero-cross counter) during a specified time the two blocks together can help achieve this. The following image uses a sine tone input, on/off switches, Pulse Counter, Readback cell, and GPIO output.
Algorithm Details
| Toolbox Path | Counters - Counters - Pulse Counter |
| Cores Supported | AD1940 ADAU170x ADAU144x ADAU176x ADAU178x |
| “Grow Algorithm” Supported | no |
| “Add Algorithm” Supported | no |
| Subroutine/Loop Based | no |
| Program RAM | 12 |
| Data RAM | 3 |
| Parameter RAM | 0 |
resources/tools-software/sigmastudio/toolbox/counters/pulsecounter.txt · Last modified: 22 Jun 2012 19:33 by William Jahn