Texas Instruments | CC2530 Software Examples (Rev. A) | User Guides | Texas Instruments CC2530 Software Examples (Rev. A) User guides

Texas Instruments CC2530 Software Examples (Rev. A) User guides
CC2530 Software Examples
User’s Guide
SWRU214A
1
Table of contents
1
Introduction................................................................................................................................................... 3
2
Abbreviations ................................................................................................................................................ 3
3
Using the software ......................................................................................................................................... 4
3.1
Prerequisites ........................................................................................................................................... 4
3.2
Getting started......................................................................................................................................... 5
3.2.1
Set up Hardware and Software........................................................................................................ 5
3.2.2
Program the board with IAR ........................................................................................................... 5
3.2.3
Alternative: Download hex files with the Flash Programmer ......................................................... 6
4
5
Application Examples ................................................................................................................................... 8
4.1
Light/Switch application ......................................................................................................................... 8
4.2
Packet Error Rate tester application..................................................................................................... 10
4.3
Spectrum Analyzer application ............................................................................................................. 12
Software Library Reference....................................................................................................................... 13
5.1
Software architecture ............................................................................................................................ 13
5.1.1
Software folder structure............................................................................................................... 13
5.2
Basic RF................................................................................................................................................ 14
5.2.1
Basic RF frame format .................................................................................................................. 14
5.2.2
Basic RF usage instructions .......................................................................................................... 15
5.2.3
Basic RF API reference................................................................................................................. 16
5.2.4
Basic RF operation........................................................................................................................ 18
5.2.5
Limitations of Basic RF ................................................................................................................ 21
5.3
Hardware Abstraction Layer ................................................................................................................ 21
5.3.1
HAL RF API reference ................................................................................................................. 21
References............................................................................................................................................................ 24
Document History ............................................................................................................................................... 24
SWRU214A
2
1 Introduction
This document describes software examples for the CC2530 System-on-Chip solution for IEEE
802.15.4/ZigBee. It also describes the necessary hardware and software to run the examples, and
how to get started. The software examples are designed to run on the CC2530EM mounted on
SmartRF05EB.
Section 3 of this document describes necessary prerequisites and how to get started with the code
examples. Section 4 describes how to run each of the application examples. The software library that
the code examples are built upon is described in section 5. The latter section also gives an API
reference and describes the functionality of the software library. Hex files for each of the example
applications are provided. IAR EW8051 Full version is needed for building the source code.
2 Abbreviations
API
CBC-MAC
CCM
CCM*
FCS
HAL
IO
MIC
MPDU
PAN
PER
RF
RSSI
SFD
-
Application Programming Interface
Cipher Block Chaining Message Authentication Code
Counter with CBC-MAC (mode of operation)
Extension of CCM
Frame Check Sequence
Hardware Abstraction Layer
Input/Output
Message Integrity Code
MAC Protocol Data Unit
Personal Area Network
Packet Error Rate
Radio Frequency
Received Signal Strength Indicator
Start of Frame Delimiter
SWRU214A
3
3 Using the software
This section describes the necessary hardware and software, and how to get started with the
application examples for CC2530.
3.1 Prerequisites
To successfully download and run the software described in this document, the following material is
needed:
•
•
•
•
2 x SmartRF05 EB rev. 1.7
2 x CC2530EM or CC2530-CC2591EM boards with appropriate antennas
IAR Embedded Workbench for 8051 versions 7.51¹ (Full version)
4 AA batteries
1) The software is tested with version 7.51, but later versions might also work.
Figure 1 SmartRF05EB with CC2530EM
SWRU214A
4
3.2 Getting started
The following sections describe hardware and software setup, how to program the board and how to
run example code from the IAR debugger. A description of how to operate each software example is
found in section 4 of this guide.
3.2.1 Set up Hardware and Software
Follow these steps to configure the hardware and software needed:
1.
2.
3.
4.
5.
Install IAR Embedded Workbench for 8051 and the patch to enable support for CC2530.
Save the CC2530 Software Examples zip file and unzip this file.
Attach the CC2530EM board to the SmartRF05EB.
Connect the SmartRF05EB to the PC with a USB cable.
Make sure the EM selection switch (P19 on SmartRF05EB) is placed in position SoC/TRX.
3.2.2 Program the board with IAR
6. Open IAR Embedded Workbench
7. Open the workspace file CC2530_SW_examples.eww with IAR. This file is found in the folder
ide under the folder where the CC2530 Software Examples was unzipped. Figure 2 shows the
IAR EW with the workspace opened.
8. Each application has its own project tab in the IAR workspace viewer. Select the project to be
compiled in the workspace viewer of IAR. See section 4 for a description of each application
example. The PER test and Light Switch applications both have two projects, one for the
CC2530EM and one for the CC2530-CC2591EM.
9. Select Project->Rebuild All. This will perform a full rebuild on the selected project.
10. Select Project->Debug. IAR will now establish a connection with the CC2530 and program
the application. The debugger will be started, halting the target at main().
11. Start the application by selecting Debug -> Go.
12. The board can be reset by selecting Debug -> Reset.
13. The debugger can be stopped by selecting Debug -> Stop Debugging.
14. The unit can now be operated independently from the debugger by disconnecting the USB
cable and using the AA batteries as power source. Cycle power with the power switch on the
SmartRF05EB.
15. Repeat the steps 9 to 12 to program additional boards.
SWRU214A
5
Figure 2 IAR EW
3.2.3 Alternative: Download hex files with the Flash Programmer
It is also possible to program the boards with the Texas Instruments Flash Programmer as an
alternative to IAR. Follow these steps after connecting the USB cable in section 3.2.1.
5. Install the Texas Instruments Flash Programmer. The TI Flash programmer tool is found under
the ‘Tools and software’ section on the CC2530 web site.
6. Open the Texas Instruments Flash Programmer, and choose the System-on-Chip tab. The
connected device is shown in the list as in Figure 3.
7. In the Flash image field browse to the correct hex file.
8. Make sure the ‘Erase, program and verify’ action is checked.
9. Push the ‘Perform actions’ button to program the device.
SWRU214A
6
Figure 3 Flash programmer
SWRU214A
7
4 Application Examples
The following application examples are included in this software package:
“light_switch”
Wireless light/switch application. One node is configured as a light controller,
and the other node as a wireless light switch.
“PER_test”
Packet Error Rate test application.
“spectrum_analyzer”
This application use the LCD on the SmartRF05EB to display the RSSI
values of all IEEE 802.15.4 defined channels.
Details about how to run the different application examples can be found in the following sections.
Section 3.2 describes how to program the applications on the target.
4.1 Light/Switch application
This application example requires 2 nodes programmed with the ‘light_switch’ project.
The example implements a wireless light switch application. One of the nodes is configured as a light
controller, while the other node is configured as a light switch.
The following steps must be done to use the light/switch application:
1. Reset both boards by cycling power.
2. Press Button 1 to enter the application menu
3. Choose device mode. The menu is navigated by moving the joystick right or left. Choose
device mode ‘Switch’ on one of the nodes, and ‘Light’ on the other node. Confirm the choices
by pressing Button 1.
4. The light switch application example is now ready. LED1 on the ‘Light’ node can now be
toggled by pushing joystick down on the ‘Switch’.
The data sent out from the switch device can be observed with a Texas Instruments packet sniffer*
configured on channel 25 – 2475 Mhz.
*The Texas Instruments packet sniffer application can be downloaded from:
http://focus.ti.com/docs/toolsw/folders/print/packet-sniffer.html. The following hardware can be used for
the packet sniffer: SmartRF05EB/CC2530EM, CC2531 USB dongle, CC2430DB,
SmartRF04EB/CC2430EM or SmartRF05EB/CC2520EM.
It is also possible to build the Light/Switch application with the CCM security feature included. This will
enable CCM authentication and encryption on each packet. In order to use the CCM security feature
the compile option SECURITY_CCM must be set in the project file. This can be done in IAR EW by
selecting Project and Options. Navigate to the C/C++ Compiler and Preprocessor tab and set
SECURITY_CCM as one of the defined symbols (i.e. change xSECURITY_CCM to
SECURITY_CCM). See also Figure 4. The CCM security feature is also described in section 5.2 in this
guide.
SWRU214A
8
Figure 4 Compile option for CCM security
SWRU214A
9
4.2 Packet Error Rate tester application
This application example requires 2 nodes for operation. Select the project ‘per_test’* in the IAR
workspace viewer and program both nodes.
*The PER test application is also preprogrammed on both of the CC2530EM boards found in the
CC2530DK. The CC2530DK Quick Start Guide describes how to run the preprogrammed PER test out
of the box.
The packet error rate test application sets up a one-way RF link between two nodes. One board will
operate as a transmitter and the other board will operate as a receiver. The transmitter node must be
configured with the output power to use and the number of packets to transmit as part of the PER test
(burst size). During a PER test the receiver node will display the number of received packets, the RSSI
level (signal strength) and PER.
The user configurable parameters for the test can be seen in Table 1 and Table 2. These parameters
are set using a menu on the LCD during initialization. The menu is navigated with the joystick (see
arrows in the display) and the settings are confirmed by pressing Button 1.
The user configurable parameters for the test can be seen in Table 1 and Table 2. The tables are for
the CC2530EM and CC2530-CC2591EM. When CC2530-CC2591EM is used it is possible to choose
the receiver gain, either high gain or low gain mode. The output power settings are also different
between CC2520 and CC2530-CC2591. These parameters are set using a menu on the LCD during
initialization. The menu is navigated with the joystick (see arrows in the display) and the settings are
confirmed by pressing Button S1.
Parameter
Settings
Channel
11 – 26 (2405 – 2480 MHz)
Operating Mode
Receiver, Transmitter
TX Output Power
-3 dBm, 0 dBm, 4 dBm
Burst Size
1K, 10K, 100K, 1M
Packet rate
100, 50, 20 or 10 packets per second
Table 1 User configurable parameters for CC2530EM
Parameter
Settings
Channel
11 – 26 (2405 – 2480 MHz)
Operating Mode
Receiver, Transmitter
Receiver gain
High Gain, Low Gain
TX Output Power
0 dBm, 13 dBm, 16 dBm, 18dBm or 20 dBm
Burst Size
1K, 10K, 100K, 1M
Packet rate
100, 50, 20 or 10 packets per second
Table 2 User configurable parameters for CC2530-CC2591EM
Configure one node as receiver and the other node as transmitter by following the steps below:
PER Test Receiver configuration:
Perform the following steps to configure the receiver node:
1. Reset the board by cycling power.
2. Press Button 1 to enter the application menu.
3. Select a channel between 11 and 26. Navigate the menu by pressing joystick left or right, and
confirm the selection by pressing Button 1. Note the channel, since it will also be used for the
Transmitter node.
4. Select operating mode ‘Receiver’ and confirm with Button 1.
5. The Receiver node is now ready for operation, displaying ‘Receiver Ready’.
SWRU214A
10
PER Test Transmitter configuration
Perform the following steps to configure the transmitter node:
1. Reset the board by cycling power.
2. Press Button 1 to enter the application menu.
3. Select the same channel as for the Receiver node. Navigate the menu by pressing joystick left
or right, and confirm the selection by pressing Button 1.
4. Select operating mode ‘Transmitter’ and confirm with Button 1.
5. Select TX output power by navigating the joystick. Confirm with Button 1.
6. Select the number of packets, either 1000, 10K, 100K or 1M. Press Button 1 to confirm.
7. Select packet rate; 100, 50, 20 or 10 packet per second. Press Button 1 to confirm.
8. Push the joystick down to start a PER test. The number of packets specified by burst size will
be sent to the Receiver node. Packet Error Rate, RSSI, and number of packets received are
displayed on the Receiver’s LCD panel.
9. The PER test can be stopped by pressing joystick down again.
Calculation of PER and RSSI
In order to obtain the statistics during the PER test, the receiver maintains the following variables. The
variable rxStats is of type perRxStats_t as defined in per_test.h.
rxStats.expectedSeqNum
The expected sequence number for the next packet that should
arrive. This is equivalent to the number of received packets+lost
packets +1.
rxStats.rssiSum
This is the sum of the RSSI level of the last 32 packets.
rxStats.rcvdPkts
The number of correctly received packets as part of the PER test.
rxStats.lostPkts
The number of packets that have been lost.
Lost packets are detected through a jump in the sequence number. If the received packet has a higher
sequence number than rxStats.expectedSeqNum the packets in between are calculated as lost. This
implies that a series of lost packets will not be detected until a subsequent packet has been received
correctly. Packets with errors are considered as lost.
The PER value per thousand packets is calculated by the formula:
PER = 1000* rxStats.lostPkts/ (rxStats. lostPkts+ rxStats. rcvdPkts)
(for rxStats. rcvdPkts>=1)
The RSSI value is fetched from the first byte following the payload in the received packet. This value is
in signed 2’s complement and must be corrected with an RSSI offset to get the absolute RSSI value
(in dBm). This offset is specified in the CC2530 datasheet. The converted RSSI values of the last 32
(defined by RSSI_AVG_WINDOW_SIZE in per_test.h) received packets are stored in a ring buffer,
implementing a moving average filter.
The average RSSI of the 32 last received packets is presented on the LCD of the receiver node during
a PER test.
Reset statistics in display
The values of PER, RSSI and number of received packets in the receiver’s display can be reset during
a PER test by pressing button 1.
SWRU214A
11
4.3 Spectrum Analyzer application
This application example requires one SmartRF05EB/CC2530EM as it merely measures and presents
the RSSI values of all IEEE 802.15.4 defined channels in the 2.4 GHz frequency band. The application
displays the RSSI values of all channels from 11 (2405 MHz) to 26 (2480 MHz).
The application starts up in bar graph mode. In this mode only the bar graphs of the 16 channels are
shown. The application displays values in the range -120 dBm to -10 dBm. Text mode adds a textual
display of the channel number and the measured value for one specific channel whilst still displaying
the bar graphs of all channels, albeit with reduced resolution. The user may toggle between the
display modes by moving the joystick up. In text mode the channel is selected by moving the joystick
left or right.
SWRU214A
12
5 Software Library Reference
This section describes the software libraries the application examples are built upon.
5.1 Software architecture
The design of the software in this package is based on the layered architecture as depicted in Figure 5
below.
Application
Basic RF
Hardware Abstraction Layer
Hardware
Figure 5 SW architecture
The software implementation consists of the following modules:
• Application layer. This software package contains several applications examples with access
to Basic RF and HAL.
• Basic RF. This layer offers a simple protocol for transmission and reception using a two-way
RF link.
• Hardware Abstraction Layer. Contains functionality for access to the radio and onboard
peripherals modules like LCD, UART, joystick, buttons, timers etc.
A detailed description of the Basic RF protocol is found in section 5.2. The Hardware Abstraction
Layer is described in section 5.3.
5.1.1 Software folder structure
The software and documentation in this package is organized in the folder structure shown in Figure 6.
The documentation is found in the docs folder. The workspace file is found in the ide folder. Source
code for the different applications can be found in the folder source/Apps. The components folder
includes source code for the different components used by the applications. The HAL and Basic RF
source code components are found under the components folder.
SWRU214A
13
Figure 6 Software folder structure
5.2 Basic RF
The Basic RF layer offers a simple protocol for transmission and reception using a two-way RF link.
The Basic RF protocol offers service for packet transmission and reception. It also offers secure
communication by use of CCM-64 authentication and encryption/decryption of packets. The security
features of Basic RF can be compiled in by defining the compile switch SECURITY_CCM in the
project file. The compile time inclusion of security features is done to save code space for the
applications where security features are not needed.
The protocol uses IEEE 802.15.4 MAC compliant data and acknowledgment packets. However it does
not offer a full MAC layer, only a simple data link layer for communication between two nodes. See
also section 5.2.5 for limitations of Basic RF.
Basic RF contains only a small subset of the 802.15.4 standard:
•
•
•
Association, scanning or beacons are not implemented
No defined coordinator/device roles (peer-to-peer, all nodes are equal)
No packet retransmission. This must be taken care of by the layer above Basic RF.
5.2.1 Basic RF frame format
Octets:
1
Length
Byte
2
1
Frame
Control
Sequence
number
2
2
2
Dest.
Dest.
Source
PAN ID
Address
Address
Figure 7 Basic RF frame format
SWRU214A
5
Variable
2
Aux.Sec.
Header
Frame
payload
FCS
14
The frame format of the Basic RF protocol is shown in Figure 7. The first byte is a length byte. The
length byte itself is not counted in the length. The frame control field is set according to the IEEE Std.
802.15.4-2006. Please refer to section 7.2 in the IEEE Std. 802.15.4-2006 [1].
The sequence number is an 8 bit value starting on 0 for the first packet transmitted after initialization.
The values of the destination PAN ID, destination address and source address fields are configured by
the application as part of the basic RF initialization. Please refer to the Basic RF API reference section
5.2.3 for further information.
The auxiliary security header is only included in the frames when the security features of Basic RF is
used i.e when the compile option SECURITY_CCM is set in the project file. This field is 5 bytes long
and consists of a security control byte that defines the level of protection applied to this frame, and
frame counter. The Basic RF protocol supports only one security mode: ENC-MIC-64 i.e. encryption
and authentication with 64 bits Message Integrity Code. For this mode the Security Control field is set
to 0x06 according to IEEE Std. 802.15.4-2006 [1]. The frame counter field of the auxiliary security
header is 4 bytes long and is used for replay protection of the frame. The value of the frame counter
field is set to 0 on initialization and incremented for each transmitted packet.
The frame payload is variable in length and consists of data sent from the layer above Basic RF. The
maximum length of this field is 103 Bytes.
The Frame Check Sequence field (FCS) is 2 bytes long. This field is automatically appended by the
radio chip, and is not taken care of by the Basic RF layer. When a frame is received the first byte of
FCS is replaced with the RSSI value in the RX FIFO on the radio.
5.2.2 Basic RF usage instructions
Startup
1. Make sure that the board peripherals and radio interface is initialized i.e. halBoardInit() must
have been called first.
2. Create a basicRfCfg_t structure, and initialize its members. If the security features of Basic RF
are used, the higher layer is responsible for allocating and assigning the 16 bytes key.
3. Call basicRfInit() to initialize the packet protocol.
Transmission:
1. Create a buffer with the payload to send. Maximum payload size for Basic RF is 103 Bytes.
2. Call basicRfSendPacket(). Check the return value.
Reception:
1. Perform polling by calling basicRfPacketIsReady() to check if a new packet is ready to be
received by the higher layer.
2. Call basicRfReceive() to receive the packet by higher layer. The caller is responsible for
allocating a buffer large enough for the packet and 2 Bytes buffer space for the RSSI value.
By calling basicRfReceiveOn() the radio receiver is kept on all the time. This is done for nodes that
need to be able to receive packets at any time. The drawback is a higher current consumption.
By calling basicRfReceiveOff() the radio receiver is turned off.
SWRU214A
15
5.2.3 Basic RF API reference
Include files
basic_rf.h
basic_rf_security.h
Compile time configuration
In order to use the security features of basic RF the following compile option must be set in the project
files:
SECURITY_CCM
Defining this compile switch enables the security features of Basic RF. All outgoing packets will be
authenticated and encrypted with ENC-MIC-64 CCM*. Likewise it will be assumed that all incoming
packets are authenticated and encrypted the same way.
When this compile flag is set the higher layer is responsible for allocation of a 16 bytes key for security
operations.
Data structures
The following data structure is used for Basic RF configuration:
typedef struct {
uint16 myAddr;
uint16 panId;
uint8 channel;
uint8 ackRequest;
#ifdef SECURITY_CCM
uint8* securityKey;
uint8* securityNonce;
#endif
} basicRfCfg_t;
uint16 myAddr – 16-bit short address (This node’s address)
uint16 panId – PAN ID (ID of the Personal Area Network this node is operating on)
uint8 channel – RF Channel (must be set between 11 and 26)
uint8 ackRequest – Set true to request acknowledgement from destination
uint8* securityKey – Pointer to the security key buffer allocated by the caller
uint8* securityNonce – Pointer to the security nonce buffer. This is not used by the caller.
The securityKey and securityNonce members of the structured are only compiled in if the compile
switch SECURITY_CCM is enabled.
Functions
void basicRfInit(basicRfCfg_t* pRfConfig)
Initialise basic RF datastructures. Sets channel, short address and PAN ID in the chip and
configures interrupt on packet reception. The board peripherals and radio interface must be
called before this function with the function halBoardInit().
uint8 basicRfSendPacket(uint16 destAddr, uint8* pPayload, uint8 length)
SWRU214A
16
Send packet to the given destination short address. Returns TRUE if packet was sent
successfully, and FAILED otherwise. If ackRequest is TRUE the return value of this function
will only be TRUE if an acknowledgment is received from the destination.
uint8 basicRfPacketIsReady(void)
Returns TRUE if a received packet is ready to be retrieved by higher layer.
int8 basicRfGetRssi(void)
Returns the RSSI value of the last received packet
uint8 basicRfReceive(uint8* pRxData, uint8 len, int16* pRssi)
Retrieve packet from basic RF layer. The caller is responsible for allocating buffer space for
data and the RSSI value.
void basicRfReceiveOn(void)
Turn on receiver on radio. After calling this function the radio is kept on until
basicRfReceiveOff is called.
void basicRfReceiveOff(void)
Turn off receiver on radio, and keep it off unless for transmitting a packet with Clear Channel
Assessment.
Security Interface
void basicRfSecurityInit(basicRfCfg_t* pConfig)
Initialises security key and nonces
SWRU214A
17
5.2.4 Basic RF operation
This section will describe how the Basic RF and the HAL operate during initialization, packet
transmission and reception. This section assumes that the radio transceiver is a CC2530.
Initialization
Figure 8 Initialization
Figure 8 illustrates the sequence of calls during initialization of Basic RF and the HAL. The application
is responsible for calling halBoardInit() to initialize the hardware peripherals and configure IO ports.
The application must then initialize an instance of the basicRfCfg_t struct (see section 5.2.3).The
application will then call basicRfInit() with the address to the instance of this struct as parameter. The
basicRfInit() function calls the function halRFInit() which configures the radio with recommended
register settings and enabled the receive interrupt. In addition the basicRfInit() function sets up the
channel, short address and PAN ID to the CC2530, and register the interrupt service routine to handle
the received packet interrupt from the radio.
SWRU214A
18
Packet transmission
Figure 9 illustrates the sequence of function calls for a packet transmission scenario with Basic RF. In
this scenario the security features of Basic RF are disabled.
Figure 9 Packet transmission
With reference to Figure 9 these are the steps that are performed during a Basic RF packet
transmission with acknowledgement request.
1. The application prepares the payload to be sent and calls the function basicRfSend() with the
16 bit destination address, a reference to the payload buffer and the length of the payload
buffer as arguments.
2. Basic RF waits for the radio to be idle by calling halRfWaitTransceiverReady(). This function
checks that the SFD is not active.
3. Basic RF calls the function basicRfBuildMpdu(). Basic RF keeps an internal buffer for the
outgoing MPDU. It will first build the header with the correct address and header information,
SWRU214A
19
4.
5.
6.
7.
8.
and then it will copy the payload from the application over to the remaining part of the internal
buffer.
Basic RF will then call halRfWriteTxBuf() to write the MPDU to the CC2530 TX FIFO buffer.
The function halRfTransmit() is called to transmit a packet with on the air. This function will
issue the command strobe ISTXON() to send the packet in the TX FIFO.
The function halRfTransmit() will wait until the packet transmission is finished (IRQ_TXDONE
flag is set).
Basic RF will then wait for receiving the acknowledgement packet in the function
basicRfSend().
If the ACK is successfully received within a predefined waiting time, basicRfSend() returns
with status SUCCESS to the application.
Packet reception
The sequence of function calls for a packet reception scenario with security features disabled is
illustrated with Figure 10.
Figure 10 Packet reception
With reference to Figure 10 these are the steps that are performed during a packet reception with
acknowledgement request.
SWRU214A
20
1. When a new packet is completely received the RX packet done (RXPKTDONE) interrupt is
issued and the rfIsr interrupt service routine function in the HAL_RF module is called. This
leads to the basicRfRxFrmDoneIsr() interrupt service routine being invoked. See Figure 10.
2. The length of the received frame is read out from the first byte in the RX buffer on CC2530.
This is done with the call halRfReadRxBuf(length, 1) in Figure 10.
3. The complete packet is read out from the RX buffer with the call halRfRecvFrame(rxMpdu,
length). The incoming packet is stored in the internal data buffer rxMpdu.
4. The CC2530 automatically sends the ACK when AUTOACK is enabled and the incoming
frame is accepted by the address recognition with the acknowledgement flag set and the
CRC is correct. See the CC2530 datasheet for how AUTOACK is enabled [2].
5. The FCS field and the sequence number of the packet are checked. If they are as expected
the rxi.isReady flag is set TRUE to indicate that a new packet is received.
6. The application will poll this flag in a loop by calling the function basicRfPacketIsReady().
7. When basicRfPacketIsReady() return TRUE the application calls the function
basicRfReceive() to retrieve the payload and RSSI from the new incoming packet.
8. The function basicRfReceive() copies the payload over to the memory location pRxData in
the argument list. The number of bytes actually copied is returned. The RSSI value in dBm is
also copied over to the memory location pRssi in the argument list.
Note that this implementation uses RF interrupt for packet reception handling. DMA can also be used
for packet reception handling which might be more efficient in some cases. In this case the DMA will
be set up to trigger a memory transfer when a packet is received.
5.2.5 Limitations of Basic RF
Basic RF is only meant to serve as a simple example of how to use the chip. It is not a complete
protocol layer ready to be used in a commercial product.
•
•
Basic RF is not a complete data link or MAC layer protocol.
Basic RF does not have full error handling support. As an example RX FIFO overflow handling
is not implemented, and such an error will cause the software to stall.
It is recommended to use either TIMAC or SimplicTI instead of Basic RF for commercial
product development.
SimpliciTI is a simple protocol aimed at small RF networks.
TIMAC is an IEEE 802.15.4 compliant MAC layer software implementation aimed for standardized
solutions.
More info is found on the following web pages:
www.ti.com/simpliciti
www.ti.com/timac
5.3 Hardware Abstraction Layer
5.3.1 HAL RF API reference
Include files
hal_rf.h
hal_rf_security.h
SWRU214A
21
Functions
uint8 halRfInit(void)
Powers up the radio, configures the radio with recommended register settings, enables
autoack and configures the IO on the radio. This function must be called after halBoardInit().
uint8 halRfSetPower(uint8 power)
Set TX output power
uint8 halRfTransmit(void)
Transmit frame
void halRfSetGain(uint8 gainMode)
Set gain mode. This is only used if external LNA/PA is used.
uint8 halRfGetChipId(void)
return radio chip id register
uint8 halRfGetChipVer(void)
Return radio chip version register
uint8 halRfGetRandomByte(void)
Return random byte.
uint8 halRfGetRssiOffset(void)
Return RSSI offset for radio.
void halRfWriteTxBuf(uint8* data, uint8 length)
Write the number of bytes given by length from the memory location pointed to by the pointer
data to the radio TX buffer.
void halRfReadRxBuf(uint8* data, uint8 length)
Read the number of bytes given by length from radio RX buffer to the memory location pointed
to by the pointer data. The radio status byte is returned.
void halRfWaitTransceiverReady(void)
SWRU214A
22
Wait until the transceiver is ready
void halRfReceiveOn(void)
Turn on receiver on radio.
void halRfReceiveOff(void)
Turn off receiver on radio.
void halRfDisableRxInterrupt(void)
Clear and disable RX interrupt.
void halRfEnableRxInterrupt(void)
Enable RX interrupt.
void halRfRxInterruptConfig(ISR_FUNC_PTR pf)
Configure RX interrupt, and setting the function to be called on interrupt.
void halRfSetChannel(uint8 channel)
Set RF channel. Channel must be in the range 11-26.
void halRfSetShortAddr(uint16 shortAddr)
Write 16 bit short address to the radio.
void halRfSetPanId(uint16 PanId)
Write 16 bit PAN ID to the radio.
Security Interface
void halRfSecurityInit(uint8* key, uint8* nonceRx, uint8* nonceTx)
Write 16 bit nonces and key to to the radio from the memory locations pointed to by key,
nonceRx and nonceTx.
uint8 halRfReadRxBufSecure(uint8* pData, uint8 length, uint8 encrLength, uint8 authLength, uint8 m)
Read out RX buffer from radio with CCM authentication and decryption
void halRfWriteTxBufSecure(uint8* pData, uint8 length, uint8 encrLength, uint8 authLength, uint8 m)
SWRU214A
23
Write to TX buffer in radio with CCM authentication and encryption.
void halRfIncNonceTx(void)
Increment the frame counter field of the nonce used for outgoing packets. Refer to IEEE Std.
802.15.4-2006 [1] for a description of this field.
References
[1] IEEE Std. 802.15.4-2006, Wireless Medium Access Control (MAC) and Physical Layer (PHY)
Specifications for Low-Rate Wireless Personal Area Networks (WPANs)
[2] CC2530 datasheet
Document History
Revision
A
-
Date
2009.10.15
2009.03.18
Description/Changes
Updated with support for CC2530_CC2591EM.
Initial version
SWRU214A
24
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Amplifiers
Data Converters
DLP® Products
DSP
Clocks and Timers
Interface
Logic
Power Mgmt
Microcontrollers
RFID
RF/IF and ZigBee® Solutions
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
dsp.ti.com
www.ti.com/clocks
interface.ti.com
logic.ti.com
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
www.ti.com/lprf
Applications
Audio
Automotive
Broadband
Digital Control
Medical
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless
www.ti.com/audio
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/medical
www.ti.com/military
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2009, Texas Instruments Incorporated
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising