The most recent version of this page is a draft.
This version (10 May 2021 08:25) was approved by Prasad Kamath.The Previously approved version (21 Mar 2021 08:48) is available.
This version (10 May 2021 08:25) was approved by Prasad Kamath.The Previously approved version (21 Mar 2021 08:48) is available.This is an old revision of the document!
Table of Contents
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Push and Hold
Description
This block can be used for functions like a pushbutton, to condition a GPIO input to create pulses in response to the user pushing or holding the button.
Usage
A typical application would be a volume control comprising two buttons, one for up and the other for down.
- Drag the block into the workspace.
- Right-click it and select the algorithm:
- push_hold
- push/hold 2-in 2-out
- push/hold with two-button mute
- Set the parameters to fit your application:
Note: For the picture above right, push_hold was selected. Use push/hold 2-in 2-out to condition two GPIO inputs, for example one up and one down. Push/hold with mute works the similarly but with the extra feature that if both buttons are pressed, a mute pulse is generated (bottom output pin). To un-mute, any of the buttons can be pressed.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/ADSP-SC5xx | ADAU145x/1456x |
|---|---|---|---|
| —————————————- | —————————————— | ————————————————-- | ——————————————- |
| Push and Hold | Not supported | Not supported | Sample |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ————— | ——————- | ———————————————————— |
| Input0 | Control | Control Signal input that is detected by the push and hold |
Output
| Name | Type | Description |
|---|---|---|
| ————— | ——————- | —————————————————————————-- |
| Output0 | Control | Push and hold output |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | ————————————- | —————————————- |
| Hold | 500 | 0 to 10000 | Determines how long the signal is held before the repeat pulses are generated. |
| Repeat | 250 | 0 to 10000 | Sets the interval between repeated pulses. Enter the time in milliseconds in the field. |
DSP Parameters
| Parameter Name | Description | ADAU145x/ADAU146x |
|---|---|---|
| ————— | —————————————————-- | ——————————— |
| holdtime | hold time in samples | Fixed Point 32.0 |
| repeattime | repeat time in samples | Fixed Point 32.0 |
DSP Parameter Computation
holdtime= Hold*0.001*FS
repeattime= Repeat*0.001*FS
FS - sampling rate
/srv/wiki.analog.com/data/pages/resources/tools-software/sigmastudiov2/modules/gpioconditioning/pushandhold.txt · Last modified: 12 May 2021 14:26 by Prasad Kamath