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AN633

Si446X PROGRAMMING GUIDE AND SAMPLE CODES

1. Introduction

This document provides an overview of configuring the Si446x for transmitter, receiver, and transceiver operation

using simple software example codes.

The following examples are covered in this programming guide:

How to transmit a packet in simple Packet Handler mode (Sample Code 1)

How to receive a packet in simple Packet Handler mode (Sample Code 1)

How to transmit a packet in Packet Handler mode using a FIELD (Sample Code 2)

How to receive a packet in Packet Handler mode using a FIELD (Sample Code 2)

How to implement bidirectional packet-based communication (Sample Code 3)

How to use variable packet length (Sample Code 3)

How to use 4(G)FSK modulation (Sample Code 4)

Please contact the Wireless Support Team for the latest example source codes.

2. Hardware Options

The source code is provided for the Si4460-B0, Si4461-B0, Si4463-B0, and Si4464-B0 devices.

A separate Silicon Labs IDE* workspace is provided for each example on the UDP platform.

*Note: Use IDE 4.40 or higher.

2.1. Test Card Options

The power amplifier and the LNA are not connected together inside the Si446x devices. Several different test cards

are introduced to provide examples for main connection schemes.

On test cards using direct-tie connection, the TX and RX pins are directly connected externally, eliminating the

need for an RF switch.

On test cards using an RF switch, separate transmit and receive pins on the RFIC are connected to an antenna via

an SPDT RF switch for single antenna operation. The radio device assists with control of the RF switch. By routing

the RX State and TX State signals to any two GPIOs, the radio can automatically control the RF switch. The GPIOs

will disable the RF switch if the radio is not in active mode.

On test cards using split connection, the TX and RX pins are routed to different antenna connectors.

Test cards with external PA (FEM or FET type) are also provided by Silabs.

AN633

2 Rev. 0.1

Figure 1. Direct Tie Si4461 Test Card Schematic

The example source code can be compiled for various test cards and radios. The following compiling option

(located at the beginning of the ezrp_next_api.h file) selects the proper configuration (#define

EZRP_NEXT_TestCard TestCard_4463_TCE20C915). The selection has to be made based on the marketing

number of the test card.

TestCard_4463_TSQ20D169

TestCard_4463_TSQ27F169

TestCard_4461_TCE14D434

TestCard_4460_TCE10D434

TestCard_4463_TCE20B460

TestCard_4463_TCE20C460

TestCard_4460_TSC10D868

TestCard_4460_TCE10D868

TestCard_4461_TSC14D868

TestCard_4461_TCE16D868

TestCard_4463_TCE20B868

TestCard_4463_TCE20C868

TestCard_4463_TCE27F868

TestCard_4463_TCE20B915

TestCard_4463_TCE20C915

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Rev. 0.1 5

2.3. Using the Resources of the Development Board

The example programs are written in “C”. General headers and code files are provided to ease the programming of

the development board.

The file called compiler_defs.h contains macro definitions to accommodate 8051 compiler differences and

declaring special function registers and other 8051-specific features. Using these macros allows the example code

to be compiled with several common C compilers, such as Keil, SDCC, Raisonance, etc.

2.3.1. Initialization

The file called C8051F960_defs.h contains the register/bit definitions for the C8051F96x MCU family.

The file called hardware_defs.h contains the UDP platform-specific definitions.

The following macros in the hardware_defs.h file assign a label to the given IO port, so they can be more easily

referenced in the source code. For example, the SBIT(EZRP_PWRDN, SFR_P1, 7); line assigns the

EZRP_PWRDN label to P1.7 (refer to Table 1), which the SDN pin of the radio is connected to:

The void MCU_Init(void) function in the main.c file initializes all the peripherals necessary for the example

programs.

UDP platform provides an own SPI interface for the test card connected to J3 connector, other SPI devices should

not conflict with the test card. SPI interface connected to the radio test card are referred as SPI “0” in the sample

codes.

2.3.2. LED and Push Buttons

The LED control and push button reading functions can be found in the control_IO.c file:

void SetLed(U8 number)

void ClearLed(U8 number)

bit GetPB(U8 number)

Reading the push buttons is not trivial, as a button and an LED share the same pin of the MCU. During the short

period of reading a push button, the pin is set high and its direction is changed to input. This change may cause a

brief but unnoticeable LED state change. After the push button is checked, the original LED status is restored.

SBIT(MCU_SDA, SFR_P0, 6);

SBIT(MCU_SCL, SFR_P0, 7);

SBIT(MCU_SCK, SFR_P2, 0);

SBIT(MCU_MISO,SFR_P2, 1);

SBIT(MCU_MOSI,SFR_P2, 2);

SBIT(MCU_NSEL, SFR_P2, 3);

SBIT(EZRP_NIRQ, SFR_P1, 6);

SBIT(EZRP_PWRDN, SFR_P1, 7);

SBIT(PB1, SFR_P3, 0);

SBIT(PB2, SFR_P3, 1);

SBIT(PB3, SFR_P3, 2);

SBIT(PB4, SFR_P3, 3);

SBIT(LED1, SFR_P3, 0);

SBIT(LED2, SFR_P3, 1);

SBIT(LED3, SFR_P3, 2);

SBIT(LED4, SFR_P3, 3);

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zxxcome

2015-07-20

看了下，感觉还不错，对于我这种刚学的人来说，帮助挺大的
zshchance

2016-03-12

官方英文的，需要有耐心认真看
我是MR汪

2014-12-02

可能有用但是对我没用
yejiying86831051

2014-06-20

急他人所急，真心好
XRW555

2015-09-17

这就是官方的AN633啊！！

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