- 您现在的位置：买卖IC网 > PDF目录17008 > 20-151-0178 (Rabbit Semiconductor)CABLE CONVERTER RS-232 TO USB PDF资料下载
参数资料
| 型号： | 20-151-0178 |
| 厂商： | Rabbit Semiconductor |
| 文件页数： | 79/162页 |
| 文件大小： | 0K |
| 描述： | CABLE CONVERTER RS-232 TO USB |
| 标准包装： | 1 |
| 附件类型： | USB 至 RS232 适配器 |
| 适用于相关产品： | 基于 Rabbit 的板 |
| 产品目录页面： | 619 (CN2011-ZH PDF) |
| 其它名称： | 20-151-0178-ND 316-1181 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页当前第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页
6.4 Software Walk-Through
In this section, we will begin with the speaker_tone.c sample program and modify it to demonstrate
more RabbitFLEX functionality. Note that to make the modifications and run the sample program, you
will need the speaker option, appropriate digital inputs and outputs, and the demo board that is included
with the RabbitFLEX tool kit. However, even if you do not have these items, you should still be able to
read along to gain more understanding of how to use the RabbitFLEX software.
6.4.1 Studying speaker_tone.c
The speaker_tone.c sample program demonstrates how to use the tone driver. For the purposes of
RabbitFLEX, it is not necessary to understand all of the details of this sample program, but essentially it
builds waveforms at different frequencies to be used with the tone driver. The refwave_organ() and
refwave_saw() functions build the waveforms; the buildwave() function adapts the organ and
saw waveforms to different frequencies.
In the following walk-through, we will only be making changes to the main() function, so it is probably
worth studying main() to understand it.
void main(void)
{
char ch;
char repeat;
int request_exit;
// Holds the user command
// Indicates whether or not the tone should repeat
// Indicates if user has requested to exit the program
The above section of code simply declares some variables for later use in main() .
// This function must be called to initialize the RabbitFLEX board
brdInit();
The brdInit() function must be called at the beginning of every RabbitFLEX BL300F program. It sets
up internal data structures, initializes analog capabilities, sets up CPU registers appropriately, etc. If this
function is not called, then much of the RabbitFLEX I/O capability will be unavailable.
// This function sets the correct PWM channel to use for the speaker.
// Simply pass a pointer to the speaker structure.
flexSpeakerPWM(&MY_SPEAKER);
The above function is used to set the PWM (Pulse Width Modulation) channel that the speaker uses. This
introduces the idea of using data structures to pass information into the RabbitFLEX functions.
MY_SPEAKER is a macro that has been defined at the top of the program to flex_speaker . So, with-
out the macro definition, this line would be:
flexSpeakerPWM(&flex_speaker);
flex_speaker is a data structure of type Flex_IOPin . These data structures contain all of the infor-
mation that the RabbitFLEX functions need to know about the given pin. In this case, the structure con-
tains the correct PWM channel. Note that instead of passing the data structure itself, we pass a pointer to
the data structure. We will see this again and again in other RabbitFLEX functions.
RabbitFLEX User’s Manual
73
相关PDF资料 |
PDF描述 |
|---|---|
| MAX11200EVKIT+ | KIT EVALUATION FOR MAX11200 |
| HCC06DRTF-S13 | CONN EDGECARD 12POS .100 EXTEND |
| HK1608R47J-T | INDUCTOR HI FREQ 470NH 5% 0603 |
| PCM16XD0 | PROCESSOR MODULE FOR MPLAB-ICE |
| SDR1006-681KL | INDUCTOR POWER 680UH 0.28A SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 20-151-0183 | 功能描述:处理器配件 UNIVL PWRSUPLY 12VDC 1A/W MOLEX MICROFIT3 RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于: |
| 2015103-1 | 制造商:TE CONNECTIVITY 功能描述:RF C/A, RT ANG QMA/DIN 1.0/2.3 CONN |
| 2015-104 | 制造商:The Bergquist Company 功能描述:THERMAL PAD TO-3P PK5 制造商:The Bergquist Company 功能描述:THERMAL PAD, TO-3P, PK5 制造商:The Bergquist Company 功能描述:THERMAL PAD, TO-3P, PK5; Insulator Body Material:Silicone Elastomer; Thermal Conductivity:3.5W/m.K; Breakdown Voltage Vbr:4kV; Thickness:0.508mm; Volume Resistivity:100000Mohm-m; SVHC:No SVHC (19-Dec-2012); Electrical Property Ins / |
| 2015-104 | 制造商:The Bergquist Company 功能描述:THERMAL PAD TO-3P 制造商:The Bergquist Company 功能描述:THERMAL PAD, TO-3P |
| 201511 | 制造商:Phoenix Contact 功能描述:Misc Products |
发布紧急采购，3分钟左右您将得到回复。