📄 dm7520_library.h
字号:
EINVAL counter is not valid. Please see the descriptions of the internal functions dm7520_readreg() and dm7520_writereg() for information on other possible values errno may have in this case. ******************************************************************************/int Get8254Status7520(int board, int counter, uint8_t *status_p);/******************************************************************************GetAcntCount7520() Purpose: Read a board's About Counter value. Parameters: board ===> File descriptor of board. value_p => Address where About Counter value should be stored. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. NOTE: Because of the way the About Counter works in the hardware, the value it contains is actually one less than the number of samples. This function internally adjusts for this so that the value returned is correct. ******************************************************************************/int GetAcntCount7520(int board, uint16_t *value_p);/******************************************************************************GetAdcntCount7520() Purpose: Read a board's A/D Sample Counter value. Parameters: board ===> File descriptor of board. value_p => Address where A/D Sample Counter value should be stored. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetAdcntCount7520(int board, uint16_t *value_p);/******************************************************************************get_control_buf7520() Purpose: Map the driver's DMA control buffer into the calling process' address space. Parameters: board =========> File descriptor of board. controlBuffer => Address where address at which DMA control buffer was mapped will be stored. Return Value: 0 Success. -1 Failure with errno set as follows: EBUSY The device file referred to by board was not opened. ENXIO The minor number of the device file referred to by board is greater than the number of DM7520 devices supported. ENXIO The device referred to by board was not configured, failed its configuration, or is not present. Please see the mmap(2) man page for information on other possible values errno may have in this case. NOTE: The address mapping created by this function has the following properties: 1) it is the same size as the kernel's idea of how big a page of memory is, 2) it is readable and writable, 3) the mapping is private, i.e. it exists in the calling process only and is not shared with other processes, and 4) paging is disabled for the mapping, i.e. the addresses are locked into memory. ******************************************************************************/int get_control_buf7520(int board, char **controlBuffer);/******************************************************************************GetDcntCount7520() Purpose: Read a board's Delay Counter value. Parameters: board ===> File descriptor of board. value_p => Address where Delay Counter value should be stored. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetDcntCount7520(int board, uint16_t *value_p);/******************************************************************************GetDIO0Clock7520() Purpose: Read the clock source selected for a board's digital I/O port 0. Parameters: board ====> File descriptor of board. source_p => Address where clock source should be stored. Zero will be stored here if the clock source is the 8 MHz system clock. One will be stored here if the clock source is the User Timer/Counter 1. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO0Clock7520(int board, uint8_t *source_p);/******************************************************************************GetDIO0CompareMode7520() Purpose: Read the digital interrupt mode selected for a board's digital I/O port 0. Parameters: board ==> File descriptor of board. mode_p => Address where interrupt mode should be stored. Zero will be stored here if the interrupt mode is event mode. One will be stored here if the interrupt mode is match mode. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO0CompareMode7520(int board, uint8_t *mode_p);/******************************************************************************GetDIO0CompareValue7520() Purpose: Read the Compare Register value for a board's digital I/O port 0. Parameters: board ===> File descriptor of board. value_p => Address where Compare Register value will be stored. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() and the description of SelectDIO0Register7520() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO0CompareValue7520(int board, uint8_t *value_p);/******************************************************************************GetDIO0Direction7520() Purpose: Read the Direction Register value for a board's digital I/O port 0. Parameters: board ==> File descriptor of board. mask_p => Address where Direction Register value will be stored. The value is a bit mask where a zero in a bit position means that bit is set to input and a one in a bit position means that bit is set to output. For example, if the bit mask has the value 0x81 then bits 7 and 0 are set to output while all other bits are set to input. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() and the description of SelectDIO0Register7520() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO0Direction7520(int board, uint8_t *mask_p);/******************************************************************************GetDIO0Mask7520() Purpose: Read the Mask Register value for a board's digital I/O port 0. Parameters: board ==> File descriptor of board. mask_p => Address where Mask Register value will be stored. The value is a bit mask where a zero in a bit position means that bit can generate a digital interrupt and a one in a bit position means that bit cannot cause an interrupt. For example, if the bit mask has the value 0xFE then bit zero can cause a digital interrupt while all other bits cannot. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() and the description of SelectDIO0Register7520() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO0Mask7520(int board, uint8_t *mask_p);/******************************************************************************GetDIO1Direction7520() Purpose: Read the digital I/O port 1 bit direction for a board. Parameters: board =======> File descriptor of board. direction_p => Address where port 1 direction will be stored. Zero will be stored here if port 1 bits are set to input. One will be stored here if port 1 bits are set to output. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetDIO1Direction7520(int board, uint8_t *direction_p);/******************************************************************************GetDIOStatus7520() Purpose: Read the Digital IRQ/Strobe Status Register for a board. Parameters: board ====> File descriptor of board. status_p => Address where Status Register value will be stored. The bits returned are interpreted as follows: 0, 1 - Port 0 register selected for programming at address LAS0 + 0x78. 00 = Clear Register 01 = Direction Register 10 = Mask Register 11 = Compare Register 2 ---- Port 1 bit direction. 0 = input 1 = output 3 ---- Digital interrupt mode. 0 = event mode 1 = match mode 4 ---- Digital interrupt enable. 0 = disabled 1 = enabled. 5 ---- Digital sample clock select. 0 = 8 MHz system clock 1 = User Timer/Counter 1 6 ---- Digital interrupt status. 0 = no interrupt occurred 1 = interrupt occurred 7 ---- Strobe status. 0 = no strobe occurred 1 = strobe occurred Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure. Please see the description of the internal function dm7520_readreg() for information on possible values errno may have in this case. ******************************************************************************/int GetDIOStatus7520(int board, uint8_t *status_p);/******************************************************************************GetErrorCode7520() Purpose: Read driver's error code for a board. Parameters: board => File descriptor of board. code ==> Address where error code will be stored. -999 will be stored here if the hardware detected an interrupt overrun. -ENOBUFS will be stored here if either the A/D FIFO or the high speed digital input FIFO filled up before enough data was read. Nothing is written to this memory location if the function fails. Return Value: 0 Success. -1 Failure with errno set as follows: EBUSY The device file referred to by board was not opened. ENXIO The minor number of the device file referred to by board is greater than the number of DM7520 devices supported. ENXIO The device referred to by board was not configured, failed its configuration, or is not present. NOTE: This function can be used to obtain more information about why a call to ReadData7520() did not return the requested number of samples. ******************************************************************************/⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -