- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16231 > 101-0452 (Rabbit Semiconductor)KIT DEV RABBIT RCM2100 INTL PDF資料下載
參數(shù)資料
| 型號： | 101-0452 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 20/100頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT DEV RABBIT RCM2100 INTL |
| 標準包裝： | 1 |
| 系列： | RabbitCore 2000 |
| 主要目的： | * |
| 嵌入式： | * |
| 已用 IC / 零件： | HYDRA |
| 主要屬性： | * |
| 次要屬性： | * |
| 已供物品： | HYDRA 裝置，存儲卡，空白試驗卡，鼠標，鍵盤，游戲鍵盤，視頻和 USB 線纜，電源和 CD 等 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁
20
RabbitCore RCM2100
3.1.4.2 FLASHLEDS.C
In addition to Dynamic C’s implementation of C-language programming for embedded
systems, it supports assembly-language programming for very efficient processor-level
control of the module hardware and program flow. This application is similar to
FLASHLED.C
and TOGGLELEDS.C, but uses assembly language for the low-level port
control within cofunctions, another powerful multitasking tool.
Dynamic C permits the use of assembly language statements within C code. This program
creates three functions using assembly language statements, then creates a C cofunction to
call two of them. That cofunction is then called within main().
Within each of the C-like functions, the #asm and #endasm directives are used to indicate
the beginning and end of the assembly language statements.
In the function initialize_ports( ), port A is initialized to be all outputs while bit 0
of port E is initialized to be an output.
In the function ledon(), a 0 is written to the port A bit corresponding to the desired LED
(0, which equals DS3, or 1 which equals DS4), turning that LED on. The ledoff( )
function works exactly the same way except that a 1 is written to the bit, turning the
selected LED off.
Finally, in the cofunction flashled(), the LED to be flashed, the on time in millisec-
onds, and the off time in milliseconds are passed as arguments. This function uses an end-
less for(;;) loop to call the ledon() and ledoff() functions, separated by calls to
the wait function DelayMs(). This sequence will make the indicated LED flash on and
off.
As is proper in C program design, the contents of main() are almost trivial. The program
first calls initialize_ports(), then begins an endless for(;;) loop. Within this
loop, the program:
1. Calls the library function hitwd(), which resets the microprocessor’s watchdog timer.
(If the watchdog timer is not reset every so often, it will force a hard reset of the sys-
tem. The purpose is to keep an intermittent program or hardware fault from locking up
the system. Normally, this function is taken care of by the virtual driver, but it is called
explicitly here).
2. Sets up a costatement which calls two instances of the flashled() function, one for
each LED. Note that one LED is flashed one second on, one-half second (500 ms) off,
while the other is flashed in the reverse pattern.
Note also the wfd keyword in the costatement. This keyword (an abbreviation for wait-
fordone
, which can also be used) must be used when calling cofunctions. For a complete
explanation, see Section 5 and 6 in the Dynamic C User’s Manual.
More Information
See the entries for the hitwd() and DelayMs() functions in the Dynamic C User’s
Manual, as well as those for the directives #asm and #endasm. For a complete explana-
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-J7X-EZ-F1 | CONVERTER MOD DC/DC 5.2V 25W |
| EVAL-ADF4360-8EBZ1 | BOARD EVALUATION FOR ADF4360-8 |
| VE-J7X-EY-S | CONVERTER MOD DC/DC 5.2V 50W |
| MCP73213-B6SI/MF | IC LI-ION/LI-POLY CTRLR 10-DFN |
| VE-J7W-EZ-F4 | CONVERTER MOD DC/DC 5.5V 25W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 10-104520-08P | 制造商:Amphenol Aerospace 功能描述:PLUG |
| 10-104520-08S | 制造商:Amphenol Aerospace 功能描述:PLUG |
| 10-104520-16P | 制造商:Amphenol Aerospace 功能描述:PLUG |
| 10-104520-16S | 制造商:Amphenol Aerospace 功能描述:PLUG |
| 10-104520-25S | 制造商:Amphenol Aerospace 功能描述:PLUG |
發(fā)布緊急采購，3分鐘左右您將得到回復。