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64 point 64 485 128 point 128 945 256 point 256 1905 DSP Library 2004 Microchip Technology Inc. DS51456B-page 61 CosFactorInit Description: CosFactorInitgenerates the first half of the set of cosine factors required by a Type II Discrete Cosine Transform, and places the result in the complex destination vector. Effectively, the set contains the values: , where 0 ≤k
and stores the results in the destination vector. Include: dsp.h Prototype: extern fractional* DCT ( int log2N, fractional* dstV, fractional* srcV, fractcomplex* cosFactors, fractcomplex* twidFactors, int factPage ); CN k () e j πk 2N -------= dsPIC ® Language Tools Libraries cộng thêm từ chương trình từ VectorZeroPad, và DCTIP. Chu kỳ (bao gồm cả cuộc gọi C-chức năng và trả các chi phí): 22 cộng với chu kỳ từ VectorZeroPad, và DCTIP. Lưu ý: Trong các mô tả về số VectorZeroPadthe của chu kỳ báo cáo bao gồm 4 chu kỳ của C-chức năng gọi điện trên không. Như vậy, số chu kỳ thực tế từ VectorZeroPadto thêm vào DCTis 4 ít hơn bất cứ số được báo cáo cho một đứng một mình VectorZeroPad. Trong cùng một cách, số chu kỳ thực tế từ DCTIPto thêm vào DCT 3 ít hơn bất cứ điều gì numberis báo cáo cho một đứng một mình DCTIP. DCT (Tiếp theo) 12N () / DSP Thư viện 2004 Microchip Technology Inc DS51456B trang 63 DCTIP Mô tả: DCTIPcomputes rời rạc Cosine Transform của một vector nguồn trong nơi. Bao gồm: dsp.h Nguyên mẫu: ở ngoài phân đoạn * DCTIP ( DS51456B-page 62 2004 Microchip Technology Inc. int log2N, Arguments: log2N based 2 logarithm of N (number of complex elements in source vector) dstCV pointer to destination vector srcCV pointer to source vector cosFactors pointer to cosine factors twidFactors pointer to twiddle factors factPage memory page for transform factors Return Value: Pointer to base address of destination vector. Remarks: N mustbe an integer power of 2. This function operates out of place. A vector of size 2N elements, must already have been allocated and assigned to dstV. The dstVvector must be allocated at a modulo alignment of N. The results of computation are stored in the first N elements of the destination vector. To avoid saturation (overflow) during computation, the values of the source vector shouldbe in the range [-0.5, 0.5]. Only the first N/2 cosine factors are needed. Only the first N/2 twiddle factors are needed. If the transform factors are stored in X-Data space, cosFactorsand phân đoạn * srcV, fractcomplex * cosFactors, fractcomplex * twidFactors, int factPage ); Đối số: log2N dựa 2 logarit của N (số yếu tố phức tạp trong vector nguồn) srcCV con trỏ tới vector nguồn cosFactors con trỏ đến các yếu tố cosin twidFactors con trỏ đến các yếu tố quay vòng trang bộ nhớ factPage cho chuyển đổi các yếu tố Quay trở lại giá trị: Con trỏ trỏ tới địa chỉ cơ sở của vector đích. Bình luận: N mustbe một sức mạnh nguyên 2. Chức năng này hy vọng rằng sourcevector đã không đệm để chiều dài 2N. Các srcVvector phải được phân bổ tại một liên kết modulo N. Các kết quả tính toán được lưu trữ trong các yếu tố đầu tiên của nguồn N vector. Để tránh bão hòa (overflow) trong tính toán, giá trị của các
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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
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-15 or smaller than -1.0. Analogous
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CORCON saved, used, restored DOand
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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 and 72: } IIRTransposedStruct; extern fract
Page 73 and 74: no REPEATinstructions Program words
Page 75 and 76: Language Tools Libraries DS51456B-p
Page 77: for instance if: a = Op1 (b, c), wi
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:
Page 123 and 124: DS51456B-page 100 3.5.2 Individual
Page 125 and 126: 3.6 ADC10 FUNCTIONS This section co
Page 127 and 128: 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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