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the number of bits to shift: negativeindicates shift left, positive is shift right. Source File: iirtrans.asm DSP Library 2004 Microchip Technology Inc. DS51456B-page 55 Function Profile: System resources usage: W0..W7 used, not restored W8..W11 saved, used, restored ACCA used, not restored ACCB used, not restored CORCON saved, used, restored PSVPAG saved, used, restored DOand REPEATinstruction usage: 2 level DOinstructions 1 level REPEATinstructions Program words (24-bit instructions): 48 Cycles (including C-function call and return overheads): 35 + N(11 + 11S), or 38 + N( 9 + 17S) if coefficients in P memory. S is number of second order sections. IIRTransposedInit Description: IIRTransposedInitinitializes to zero the delay values in an IIRTransposedStructfilter structure. Include: dsp.h Prototype: extern void IIRTransposedInit ( IIRTransposedStruct* filter ); Arguments: Filter structure: (See description of IIRTransposedfunction). Initialization Description: filter pointer to IIRTransposedStructfilter structure. Remarks: The delay is made up of two independent buffers, each buffer containing one word of filter state per section {d2[s], d1[s]}, 0 ≤s
no REPEATinstructions Program words (24-bit instructions): 8 Cycles (including C-function call and return overheads): 11 + 2S, S is number of second order sections. IIRTransposed (Continued) dsPIC ® Language Tools Libraries DS51456B-page 56 2004 Microchip Technology Inc. 2.6.6 OCTAVE model for analysis of IIRLatticefilter The following OCTAVE model may be used to examine the performance of an IIR Lattice Filter prior to using the fractionalimplementation provided by the function IIRLattice. function [out, del, forward, backward] = iirlatt (in, kappas, gammas, delay) ## FUNCTION.-## IIRLATT: IIR Fileter Lattice implementation. ## ## [out, del, forward, backward] = iirlatt (in,kappas, gammas, delay) ## ## forward: records intermediate forward values. ## backward: records intermediate backward values. #.............................................................................. ## Get implicit parameters. numSamps = length(in); numKapps = length(kappas); if (gammas != 0) numGamms = length(gammas); else numGamms = 0; endif numDels = length(delay); filtOrder = numDels-1; ## Error check. if (numGamms != 0) if (numGamms != numKapps) fprintf ("ERROR! %d should be equal to%d.\n", numGamms, numKapps); return; endif endif hiện tại = sau; cuối del (M + 1) = sau; ## Cấu trúc thang (tính đầu ra). if (gam mầu == 0) ra (n) = del (M + 1); khác cho m = 1: M + 1 ra (n) = ra (n) + gam mầu (M + 2-m) * del (m); endfor endif endfor ## Quay trở lại. trở lại; # ................................................. ............................. endfunction dsPIC ® Thư viện Công cụ Ngôn ngữ DS51456B trang 58 2.7 BIẾN ĐỔI CHỨC NĂNG 2004 Microchip Technology Inc Phần này trình bày các khái niệm về một phân đoạn chuyển đổi, như xem xét bởi DSP Thư viện, và mô tả các chức năng cá nhân đó thực hiện chuyển đổi hoạt động. 2.7.1 Fractional Chuyển đổi hoạt động Một phân đoạn chuyển đổi là một tuyến tính, thời gian bất biến, hoạt động rời rạc mà khi áp dụng cho một chuỗi mẫu miền thời gian phân đoạn, kết quả trong một tần số phân đoạn trong miền tần số. Ngược lại, ngược lại phân đoạn chuyển đổi hoạt động, khi áp dụng cho dữ liệu miền tần số, kết quả là đại diện miền thời gian của mình. Một tập hợp các biến đổi (và một tập hợp các biến đổi nghịch đảo) được cung cấp bởi DSP Thư viện. Tập đầu tiên áp dụng một biến đổi Fourier rời rạc (hoặc nghịch đảo của nó) vào một phức tạp tập hợp dữ liệu (xem dưới đây để mô tả các giá trị phân số phức tạp). Tập thứ hai áp dụng một loại II Discrete Cosine Transform (DCT) cho một chuỗi giá trị thực. Những biến đổi đã được thiết kế toeither hoạt động out-of-địa điểm, hoặc tại chỗ. Các cựu loại populates một chuỗi đầu ra với kết quả của việc chuyển đổi. Năm thứ hai, trình tự đầu vào (vật lý) được thay thế bằng các trình tự chuyển đổi. Đối với ngoài ra hoạt động, đủ bộ nhớ để chấp nhận các kết quả của việc tính toán phải
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2004 Microchip Technology Inc. DS51
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dsPIC ®LANGUAGE TOOLS LIBRARIES 20
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215 4.11 variable argument lists .
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and macros for standard C operation
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This documentation is provided on t
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• Development Systems Information
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data section. The alternate startup
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specific libraries.) When compiling
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esults will occur when the function
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A batch file named makedsplib.batis
Page 21 and 22: -15 or smaller than -1.0. Analogous
Page 23 and 24: CORCON saved, used, restored DOand
Page 25 and 26: fractional* srcV ); Arguments: numE
Page 27 and 28: VectorCorrelateis 4 less than whate
Page 29 and 30: less than or equal to any previous
Page 31 and 32: Remarks: The negated value of 0x800
Page 33 and 34: Cycles (including C-function call a
Page 35 and 36: plus program words from VectorCopy
Page 37 and 38: Prototype: extern fractional* Black
Page 39 and 40: ); Arguments: numElems number of el
Page 41 and 42: the base address of the matrix. Bec
Page 43 and 44: in default RAM memory space (X-Data
Page 45 and 46: 0 ≤i < numRows1 0 ≤j < numCols2
Page 47 and 48: 20 + 3(numRows*numCols) MatrixSubtr
Page 49 and 50: (of the same dimension) whose eleme
Page 51 and 52: history of the filter. After perfor
Page 53 and 54: Oppenheim and Ronald Schafer’s Di
Page 55 and 56: modulo buffer. Source samples, x[n]
Page 57 and 58: FIRDelayInit Description: FIRDelayI
Page 59 and 60: filter. Include: dsp.h Prototype: e
Page 61 and 62: FIRStruct* filter, fractional* refS
Page 63 and 64: energyEstimate estimated energy val
Page 65 and 66: fractional* delayBase ); Arguments:
Page 67 and 68: Source File: iircan.asm DSP Library
Page 69 and 70: srcSamps pointer to source samples
Page 71: } IIRTransposedStruct; extern fract
Page 75 and 76: Language Tools Libraries DS51456B-p
Page 77 and 78: for instance if: a = Op1 (b, c), wi
Page 79 and 80: and stores the results in the desti
Page 81 and 82: Description: DCTIPcomputes the Disc
Page 83 and 84: int log2N, fractcomplex* dstCV, fra
Page 85 and 86: fractcomplex* srcCV, fractcomplex*
Page 89 and 90: value can be calculated using the i
Page 91 and 92: A complex vector of size N/2 must h
Page 93 and 94: specific libraries. When compiling
Page 95 and 96: Control I/O pin definitions RW_PIN
Page 97 and 98: y calling the BusyXLCD()function. T
Page 99 and 100: COM1_COM16 COM16_COM1 Display On/Of
Page 101 and 102: Source File: CAN1AbortAll.c CAN2Abo
Page 103 and 104: char CAN2IsRXPassive(void); Argumen
Page 105 and 106: CAN2SendMessage Description: This f
Page 107 and 108: CAN2SetMask Description: This funct
Page 109 and 110: CAN_IDLE_CON_NO_WAITCAN On in Idle
Page 113 and 114: CAN_INDI_INVMESS_DIS CAN_INDI_WAK_D
Page 115 and 116: { /* Length of data tobe transmitte
Page 117 and 118: Return Value: If the value of DONE
Page 119 and 120: dsPIC Peripheral Libraries 2004 Mic
Page 121 and 122: ..... SKIP_SCAN_AN15 Return Value:
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DS51456B-page 100 3.5.2 Individual
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3.6 ADC10 FUNCTIONS This section co
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Module On/Off ADC_MODULE_ON ADC_MOD
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ADPCFG register as defined below: E
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ADC_CHX_NEG_SAMPLEB_AN6AN7AN8 ADC_C
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Scanselect = SKIP_SCAN_AN2 & SKIP_S
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dsPIC ® Language Tools Libraries D
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void OpenTimer4(unsigned int config
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Tx_SOURCE_EXT Tx_SOURCE_INT period
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3.7.2 Individual Macros WriteTimer2
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SetPriorityIntT4 SetPriorityIntT5 D
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Code Example: char reset_state; res
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Arguments: None Remarks: This macro
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stored into CNPU2 register. The upp
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SetPriorityInt2 SetPriorityInt3 Set
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IC_INT_PRIOR_3 IC_INT_PRIOR_4 IC_IN
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ReadCapture3 ReadCapture4 ReadCaptu
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void CloseOC4(void); void CloseOC5(
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Include: outcompare.h Prototype: vo
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Include: outcompare.h Prototype: un
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SetDCOC3PWM SetDCOC4PWM SetDCOC5PWM
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Code Example: pulse_start = 0x40 ;
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T3CON = 0x8000; T1CON = 0X8000; /*
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Transmit Interrupt Priority UART_TX
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UART_1STOPBIT config2 This contains
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Source File: WriteUART1.c WriteUART
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Code Example: EnableIntU2TX; Disabl
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ConfigIntUART1(UART_RX_INT_EN & UAR
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DCI_INT_PRI_4 DCI_INT_PRI_5 DCI_INT
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DCI_FRAME_LEN_15 DCI_FRAME_LEN_14 .
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Prototype: unsigned int ReadDCI(uns
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contents are sent duringthe timeslo
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SPI_INT_PRI_4 SPI_INT_PRI_5 SPI_INT
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Prototype: void WriteSPI1(unsigned
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Remarks: This functions initializes
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2004 Microchip Technology Inc. DS51
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SEC_PRESCAL_7_1 & PRI_PRESCAL_64_1;
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enables/disables the interrupt. Sou
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QEI_QE_CLK_DIVIDE_1_32 QEI_QE_CLK_D
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} int main(void) { unsigned int max
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PWM_PEN2H PWM_PDIS2H PWM_PEN1H PWM_
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PWM_POUT_1L Bit defines related to
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PWM_DTS3I_UA PWM_DTS3I_UB Dead Time
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PWM_OVA3H_INACTIVE PWM_OVA2H_INACTI
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Language Tools Libraries DS51456B-p
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#include #include void __attribute
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Prototype: void ConfigIntI2C(unsign
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Arguments: None Return Value None R
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a #definestatement in the i2c.h Sou
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I2C_IDLE_CON SCL Release Control bi
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i2c_data_wait This is the timeout c
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3.17.2 Individual Macros StartI2C D
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Arguments: None Remarks: This macro
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• src\libm- source code for math
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Remarks: The expression evaluates t
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if (isalpha(ch)) printf("# is alpha
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Remarks: A character is considered
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ch = '&'; if (isprint(ch)) printf("
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int ch; ch = 'B'; printf("B changes
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DBL_MIN_10_EXP Description: Minimum
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Include: Value: 1 Remarks: Rounds
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Description: Maximum value of a lon
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abort - terminating See the example
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} Output: Illegal instruction execu
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must be at least one named argument
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Include: Prototype: #define va_end
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to perform input and output operati
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_IOLBF Description: Indicates line
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Include: Prototype: void clearerr(
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Include: Prototype: int feof(FILE
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Error indicator reset Standard C Li
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fpos_t pos; char buf[25]; if ((myfi
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Description: Opens a file. Include:
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Explanation: afile1must exist befor
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Arguments: s string to be written s
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10.0/2 = 5.000000 10.0/3 = 3.333333
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Explanation: This program uses myfi
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SEEK_CUR- seeks from the current po
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*pos if successful; otherwise, fset
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if ((myfile = fopen("afile.out", "r
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10.0/2 = 5.000000 10.0/3 = 3.333333
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Return Value: Returns the character
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Standard C Libraries with Math Func
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e, E doublein scientific notation f
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putchar Description: Put a characte
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Output: File renamed dsPIC ® Langu
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® Language Tools Libraries DS51456
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setbuf(myfile1, NULL); printf("myfi
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int main(void) { char sbuf[100], s[
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Include: Prototype: char *tmpnam(c
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ungetc (Continued) Standard C Libra
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va_list ap; va_start(ap, fmt); prin
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with operands of type long. Include
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i = -2; printf("The absolute value
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(int) strtol(s,0,10)except it does
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eturn 0; else return 1; } Output: S
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printf("For div(%d, %d)\n", x, y);
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free Description: Frees memory. Inc
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printf("The absolute value of %7ld
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is undefined. malloc Description: A
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with the key Remarks: qsortoverwrit
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object. If reallocsucceeds in alloc
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optional whitespace, followed by an
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® Language Tools Libraries DS51456
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Prototype: size_t wcstombs(char *s,
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characters in s2and returns a value
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printf("\n"); memcpy(buf1, buf3, 5)
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printf("\n"); printf("memset(\"%s\"
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printf("buf1 : %s\n\n", buf1); ptr
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uf3 : Why? buf2 comes before buf1 b
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str1, str2, res); res = strcspn(str
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(string length = 11 characters) str
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s2 second string n number of charac
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printf("buf1 : %s\n", buf1); printf
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contained in s2. Example: #include
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else printf("%c not found\n", ch2);
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printf("\"%s\" found at position %d
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Output: str1 : Here, on top of the
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MMMis month of the year ddis day of
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printf("Local time = %s\n", asctime
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Example: #include /* for strftime,
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(in magnitude) to be represented in
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Argument: x value between -1 and 1
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y = atan (x); printf("The arctangen
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if (errno) perror("Error"); printf(
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for (i=0; i
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} Output: The cosine of -1.000000 i
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Error: range error The hyperbolic c
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errno = 0; x = -1E3; y = exp (x); i
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y = fabs (x); printf("The absolute
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-2.0F, -1.75F, -1.5F, -1.25F}; floa
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x, y, z); errno = 0; x = 7.0; y = 0
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perror("Error"); printf("For fmodf
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Return Value: Returns the fraction,
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printf("For a number = %fand an exp
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ldexpf(-0.625000, 2) = -2.500000 Fo
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x, y); errno = 0; x = 0.0; y = log1
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NaN is returned if xis a negative n
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Arguments: x single precision float
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The sine of -1.000000 is -0.841471
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The hyperbolic sine of 0.000000 is
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Error: domain error The square root
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Return Value: Returns the tangent o
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x, y); } Output: The hyperbolic tan
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the calling process's data segment.
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eginning of the file. A return valu
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through the simulator. The return v
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uffer points to the storage locatio
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div.sd __builtin_divud Description:
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mul.uu dsPIC ® Language Tools Libr
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Return Value: Returns the psv page
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__builtin_mulus ...................
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arcsine Double Floating Point......
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Set Priority Macro.................
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isxdigit...........................
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String to Unsigned LongInteger ....
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DCT................................
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EnableIntlCx.......................
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Single Floating Point .............
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DBL_MAX_10_EXP ....................
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Single Floating Point..............
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tanhf .............................
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Set Capture Interrupt Priority ....
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ldiv_t ............................
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long long unsigned int Maximum Valu
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MatrixInvert ......................
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Single Floating Point..............
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system.............................
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Quick Sort ........................
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SEEK_SET...........................
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Minimum Value .....................
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va_arg ............................
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atoi ..............................
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strncpy ...........................
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Write..............................
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unsigned short int Maximum Value ..
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Zero, divide by....................
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