Echelon I/O Model Reference for Smart Transceivers and Neu Manual de usuario Pagina 184
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174 Timer/Counter Output Models
Usage
unsigned int
output-value
; // for 8-bit output
unsigned long
output-value
; // for 16-bit output
io_out(
io-object-name
,
output-value
);
Example
IO_1 output pulsewidth clock(7) ioDimmer;
mtimer repeating tick;
unsigned short brightness;
when (...) {
tick = 10; // start clock for fading
brightness = 255; // start brightness for fading
}
when (timer_expires(tick_timer)) {
io_out(ioDimmer, --brightness);
if (brightness == 0) {
tick = 0;
// turn off the timer
}
}
Stretched Triac Output
The stretchedtriac I/O model is used to control the delay of an output pulse signal
with respect to an input trigger signal. For control of AC circuits using a
stretchedtriac I/O object, the sync input is typically a zero-crossing signal, and
the pulse output is the triac trigger signal. The output pulse width is
programmatically controlled, normally active low, but it can be inverted. The
pulse width is independent of the Neuron input clock.
You can use this I/O model to control AC circuits that use a triac device, such as
lamp dimmers.
This model applies to Series 5000 Neuron Processors and Smart Transceivers.
For Series 3100 devices, see
Triac Output
on page 179.
Comparing Stretched Triac Output to Triac Output
Figure 65 on page 175 shows basic triac operation for a Series 3100 device using
the triac I/O object. For a Series 3100 device, the turn-on pulse has a fixed
duration of 25.6 μs, which is sufficient to control many triac devices.
- I/O Model Reference for Smart 1
- Transceivers and Neuron Chips 1
- Welcome 3
- Audience 3
- Related Documentation 3
- Mini FX User’s Guide 4
- Series 5000 Chip Data Book 4
- Table of Contents 5
- Introduction 11
- Overview 12
- Direct I/O Models 14
- Parallel I/O Models 14
- Serial I/O Models 15
- Overlaying I/O Objects 18
- I/O Timing Issues 22
- Information 24
- Multiplexing I/O Models 28
- General I/O Functions 28
- Neuron C Reference Guide 29
- I/O Events 31
- Neuron C Programmer’s Guide 31
- Using Functions or Events 35
- Timer/Counter I/O Models 38
- Output Models 39
- Bit Input/Output 42
- Bit Input Example 45
- Bit Output Example 45
- Byte Input/Output 45
- Byte Input Example 47
- Byte Output Example 48
- Leveldetect Input 48
- Nibble Input/Output 50
- Nibble Input Example 53
- Nibble Output Example 53
- Touch Input/Output 53
- Muxbus Input/Output 62
- Parallel Input/Output 65
- Master Program 71
- Slave Program 72
- Slave B Mode 73
- Token Passing 76
- Handshaking 76
- Transferring Data 76
- Resynchronization Procedure 77
- Using the IRQ Signal 80
- Bitshift Input/Output 86
- Bitshift Input Example 90
- Bitshift Output Example 90
- I2C Input/Output 90
- Magcard Bitstream Input 94
- Magcard Input 96
- Magtrack1 Input 99
- Programming Considerations 100
- Syntax 101
- Example 102
- Neurowire Input/Output 102
- Hardware Considerations 102
- Neurowire Master Mode 103
- Neurowire Slave Mode 104
- SCI (UART) Input/Output 108
- Serial Input/Output 113
- Serial Input Example 117
- Serial Output Example 117
- SPI Input/Output 117
- SPI Master 122
- SPI Master (Neurowire 122
- SPI Slave 123
- Wiegand Input 128
- Timer/Counter Input Models 133
- Dualslope Input 135
- Neuron C Resources 138
- Edgelog Input 139
- Infrared Input 144
- Ontime Input 148
- Period Input 151
- Pulsecount Input 155
- Quadrature Input 158
- Totalcount Input 161
- Timer/Counter Output Models 165
- Edgedivide Output 166
- Frequency Output 169
- Infrared Pattern Output 172
- Oneshot Output 175
- Pulsecount Output 178
- Pulsewidth Output 181
- Stretched Triac Output 184
- Triac Output 189
- Example 1 192
- Example 2 193
- Triggered Count Output 193
- Timer/Counter Periods and 197
- Resolution 197
- InputClock 199
- And so on 200
- Period = 201
- Frequency = 1 / 201
- 196 Index 206
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