fast maths ROUTINES for delphi/BCB
標(biāo)簽： ROUTINES delphi maths fast
上傳時(shí)間： 2014-07-29
上傳用戶：xg262122
VC與西門子PLC自由口通訊例程源碼-VC and Siemens PLC source free port communication ROUTINES
標(biāo)簽： SCommtest
上傳時(shí)間： 2013-06-14
上傳用戶：youth25
第五章 Keil C51庫(kù)函數(shù)參考 C51強(qiáng)大功能及其高效率的重要體現(xiàn)之一在于其豐富的可直接調(diào)用的庫(kù)函數(shù)，多使用庫(kù)函數(shù)使程序代碼簡(jiǎn)單，結(jié)構(gòu)清晰，易于調(diào)試和維護(hù)，下面介紹C51的庫(kù)函數(shù)系統(tǒng)。 1. 第一節(jié) 本征庫(kù)函數(shù)(intrinsic ROUTINES)和非本征證庫(kù)函數(shù) C51提供的本征函數(shù)是指編譯時(shí)直接將固定的代碼插入當(dāng)前行，而不是用ACALL和LCALL語(yǔ)句來(lái)實(shí)現(xiàn)，這樣就大大提供了函數(shù)訪問(wèn)的效率，而非本征函數(shù)則必須由ACALL及LCALL調(diào)用。 C51的本征庫(kù)函數(shù)只有9個(gè)，數(shù)目雖少，但都非常有用，列如下： _crol_,_cror_：將char型變量循環(huán)向左(右)移動(dòng)指定位數(shù)后返回 _iror_,_irol_：將int型變量循環(huán)向左(右)移動(dòng)指定位數(shù)后返回 _lrol_,_lror_：將long型變量循環(huán)向左(右)移動(dòng)指定位數(shù)后返回 _nop_： 相當(dāng)于插入NOP _testbit_： 相當(dāng)于JBC bitvar測(cè)試該位變量并跳轉(zhuǎn)同時(shí)清除。 _chkfloat_： 測(cè)試并返回源點(diǎn)數(shù)狀態(tài)。 使用時(shí)，必須包含#inclucle 一行。 如不說(shuō)明，下面談到的庫(kù)函數(shù)均指非本征庫(kù)函數(shù)
標(biāo)簽： Keil C51 庫(kù)函數(shù)
上傳時(shí)間： 2013-10-19
上傳用戶：1184599859
FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-ROUTINES (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples
上傳時(shí)間： 2013-10-13
上傳用戶：13162218709
The C500 microcontroller family usually provides only one on-chip synchronous serialchannel (SSC). If a second SSC is required, an emulation of the missing interface mayhelp to avoid an external hardware solution with additional electronic components.The solution presented in this paper and in the attached source files emulates the mostimportant SSC functions by using optimized SW ROUTINES with a performance up to 25KBaud in Slave Mode with half duplex transmission and an overhead less than 60% atSAB C513 with 12 MHz. Due to the implementation in C this performance is not the limitof the chip. A pure implementation in assembler will result in a strong reduction of theCPU load and therefore increase the maximum speed of the interface. In addition,microcontrollers like the SAB C505 will speed up the interface by a factor of two becauseof an optimized architecture compared with the SAB C513.Moreover, this solution lays stress on using as few on-chip hardware resources aspossible. A more excessive consumption of those resources will result in a highermaximum speed of the emulated interface.Due to the restricted performance of an 8 bit microcontroller a pin compatible solution isprovided only; the internal register based programming interface is replaced by a set ofsubroutine calls.The attached source files also contain a test shell, which demonstrates how to exchangeinformation between an on-chip HW-SSC and the emulated SW-SSC via 5 external wiresin different operation modes. It is based on the SAB C513 (Siemens 8 bit microcontroller).A table with load measurements is presented to give an indication for the fraction of CPUperformance required by software for emulating the SSC.
標(biāo)簽： synchronous Emulating serial
上傳時(shí)間： 2014-01-31
上傳用戶：z1191176801
The solution presented in this paper and in the attached source files emulates the mostimportant SSC functions by using SW ROUTINES implemented in C. The code is focused onthe SAB C513, but will fit to all C500 derivatives.Beyond the low level software drivers a test shell is delivered. This shell allows a quicktest of the software drivers by an emulator or a starter kit demo board.
上傳時(shí)間： 2013-11-24
上傳用戶：363186
The P90CL301 is a highly integrated 16/32 bit micro-controller especially suitable for applications requiring lowvoltage and low power consumption. It is fully software compatible with the 68000. Furthermore, it provides bothstandard as well as advanced peripheral functions on-chip.One of these peripheral functions is the I2C bus. This report describes worked-out driver software (written in C) toprogram the P90CL301 I2C interface. It also contains interface software ROUTINES offering the user a quick start inwriting a complete I2C system application.
上傳時(shí)間： 2014-01-06
上傳用戶：氣溫達(dá)上千萬(wàn)的
This application note demonstrates how to write an Inter Integrated Circuit bus driver (I2C) for the XA-S3 16-bitMicrocontroller from Philips Semiconductors.Not only the driver software is given. This note also contains a set of (example) interface ROUTINES and a smalldemo application program. All together it offers the user a quick start in writing a complete I2C system applicationwith the PXAS3x.The driver ROUTINES support interrupt driven single master transfers. Furthermore, the ROUTINES are suitable foruse in conjunction with real time operating systems.
標(biāo)簽： software driver XA-S I2C
上傳時(shí)間： 2013-11-02
上傳用戶：zw380105939
The XA-S3 is a member of Philips Semiconductors’ XA (eXtended Architecture) family of high performance 16-bit single-chip Microcontrollers. The XA-S3 combines many powerful peripherals on one chip. Therefore, it is suited for general multipurpose high performance embedded control functions.One of the on-chip peripherals is the I2C bus interface. This report describes worked-out driver software (written in C) to program / use the I2C interface of the XA-S3. The driver software, together with a demo program and interface software ROUTINES offer the user a quick start in writing a complete I2C - XAS3 system application.
上傳時(shí)間： 2013-11-10
上傳用戶：liaofamous
Presents short and simple I2C software ROUTINES that support onlyslave (rather than master or master & slave) operation and an ASMdemonstration program. The slave-only software in this app notecomplements the master mode software presented in AN464, Usingthe 87LPC76X microcontroller as an I2C bus master.
上傳時(shí)間： 2013-11-22
上傳用戶：1039312764
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