Thingmagic Mercury xPRESS Platform v1.7 Manual de usuario Pagina 69
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Status Indication Through GPI Lines
A DIVISION OF TRIMBLE
Using the Optional Modules 69
Status Indication Through GPI Lines
Most XBee modules provide GPO status outputs, which we can monitor through xPRESS
GPI inputs..
Common functionality in the GPI manager includes:
Configuring GPI pins; i.e., calling gpio_configure_pin with the appropriate
arguments
Monitoring the state of a GPI, either by regular polling or by registering interrupt
handlers
Detecting state changes
You can print debug messages every time a GPI state changes
You can also call callbacks if some other code wants to be triggered when a GPI
state changes
Measuring frequency of state changes
For example, the RN-42 Bluetooth module blinks its GPIO5 at different rates,
depending on its internal state. This rate measurement could be useful in
other places, too, so we don’t limit its association to the Bluetooth driver.
Consumers of the GPI manager API can use the following subroutines to obtain the
status of a GPI input.
To monitor a pin: GPIMGR_registerPin(GPIO_IDX)
To stop monitoring a pin: GPIMGR_unregisterPin(GPIO_IDX)
The current state of a pin: GPIMGR_getValue(GPIO_IDX)
The current frequency of a pin’s blinking: GPIMGR_getTogglePeriodMs(GPIO_IDX)
To call back on state changes: GPIMGR_addStateListener(GPIO_IDX,
my_handler)
The GPI Manager runs in interrupt mode and the functions listed below are added as part
of the GPI Manager implementation.
bool GPIMGR_registerPin(uint32_t gpio_idx)
Used to register the GPI line that is being monitored
For the Bluetooth module, it is used to monitor connection status and the toggle
period
- Mer cury 1
- SDK Version 1.7.1 1
- Revision Table 3
- Contents 5
- 6 Contents 6
- 8 Contents 8
- Introduction 9
- Ordering Information 10
- M6e: QV5MERCURY6E 12
- Bluetooth Module: T9J-RN42 12
- WiFi Module: T9JRN171-1 12
- Quick Start Guide 17
- Hardware 18
- Software 19
- Hardware Setup 21
- 22 Quick Start Guide 22
- Quick Start Guide 23 23
- 24 Quick Start Guide 24
- Using the Sample Application 25
- RFID Sensor Application 26
- Demo App Program Flow 27
- RTC: Real Time Clock 28
- Connecting to the Console 30
- Console Commands 30
- Log and Debug Levels 33
- Using the Optional Modules 35
- Bluetooth Module 36
- Using the Optional Modules 37 37
- 38 Using the Optional Modules 38
- 7. Select Pair 39
- Using the Optional Modules 41 41
- RFID Sensor Demo Instructions 43
- RN-42 Initialization 44
- RN-42 Flow Control 45
- RN-42 Connection Status 45
- WiFi Module 46
- Using the Optional Modules 47 47
- #define ENABLE_OUTPUT_BT” 47
- Features Implemented 48
- Using the Optional Modules 49 49
- Initialization Process 50
- Using the Optional Modules 51 51
- Connection Status 52
- Power Management 52
- Console Command Control 53
- Configuration Settings 54
- Joining Networks 57
- 58 Using the Optional Modules 58
- Known Limitations 59
- Power-Over-Ethernet Module 60
- Using the Optional Modules 61 61
- Power over Ethernet 62
- Configuration 62
- GPS Module 66
- GPS Metadata 67
- 68 Using the Optional Modules 68
- is 2 output fields, not 1 68
- Using the Optional Modules 69 69
- Windows OS 71
- Install Java 72
- Click Extract 75
- Install USB Driver 76
- Next Steps 76
- Installing Java Runtime 79
- • Open a terminal shell 80
- Project Building 87
- Common Build Errors 88
- Common Error 2 89
- Obtaining a JTAG ICE 89
- JTAG Hardware Installation 90
- Accept config defaults 95
- Running the Debugger 97
- Using the Developer Toolkit 100
- A DIVISION OF TRIMBLE 101
- Disconnecting the Console 103
- Hardware Reference Guide 105
- Processor (MCU) 106
- RFID Module 107
- Battery Charging Controller 108
- AC Adapter Input 109
- Hardware Reference Guide 111 111
- OTG USB Interface 112
- Hardware Reference Guide 113 113
- Debug USB Port 114
- Module USB Interface 114
- Programmable LEDs and Switch 115
- “Coin” battery 115
- 116 Hardware Reference Guide 116
- Hardware Reference Guide 117 117
- Test Interface 118
- Power Source Precedence 119
- AC Input Adapter 120
- USB Connection 121
- Li-ion Battery 122
- Comm Bus (“POE”) Power 122
- Known HW Limitations 123
- Known Issues 123
- 124 Hardware Reference Guide 124
- Software Reference Guide 125
- Toolchain 126
- Toolchain Downloads 126
- Toolchain Build Instructions 127
- JLink GDB 127
- 128 Software Reference Guide 128
- Installing SAM-BA Software 132
- Using SAM-BA 140
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