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melman701 |
/*
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* usb_ft232h.h
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*
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* Created on: 06 february 2017.
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* Author: Dmitry Elmanov
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*/
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#ifndef USB_FT232H_H_
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#define USB_FT232H_H_
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#include <io.h>
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const alt_u8 USB_FT232H_WRDATA_ADDR = 0x0; //!< Address for write data
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const alt_u8 USB_FT232H_RDDATA_ADDR = 0x1; //!< Address for read data
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const alt_u8 USB_FT232H_TXSTATUSL_ADDR = 0x2; //!< Address for low byte of TX FIFO status register
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const alt_u8 USB_FT232H_TXSTATUSH_ADDR = 0x3; //!< Address for high byte of TX FIFO status register
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const alt_u8 USB_FT232H_RXSTATUSL_ADDR = 0x4; //!< Address for low byte of RX FIFO status register
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const alt_u8 USB_FT232H_RXSTATUSH_ADDR = 0x5; //!< Address for high byte of RX FIFO status register
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const alt_u16 USB_FT232H_STATUS_READY_MSK = 0x8000; //!< Ready bit mask of RX or TX FIFO status register
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const alt_u16 USB_FT232H_STATUS_DATA_SIZE_MSK = 0x7FFF; //!< Data size mask of RX or TX FIFO status register
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/*!
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* \brief Request data of rx FIFO status register
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* \param[in] base Module address
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* \return Rx FIFO status register data.
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*/
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inline alt_u16 usbFT232HGetRxFifoStatus(alt_u32 base)
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{
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return (IORD_8DIRECT(base, USB_FT232H_RXSTATUSL_ADDR) | (IORD_8DIRECT(base, USB_FT232H_RXSTATUSH_ADDR) << 8));
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}
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/*!
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* \brief Request data of tx FIFO status register
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* \param[in] base Module address
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* \return Tx FIFO status register data.
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*/
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inline alt_u16 usbFT232HGetTxFifoStatus(alt_u32 base)
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{
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return (IORD_8DIRECT(base, USB_FT232H_TXSTATUSL_ADDR) | (IORD_8DIRECT(base, USB_FT232H_TXSTATUSH_ADDR) << 8));
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}
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/*!
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* \brief Request number of bytes stored in rx FIFO
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* \param[in] base Module address
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* \return Number of bytes stored in rx FIFO
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*/
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inline alt_u16 usbFT232HGetNumberOfDataInRxFifo(alt_u32 base)
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{
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return (usbFT232HGetRxFifoStatus(base) & USB_FT232H_STATUS_DATA_SIZE_MSK);
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}
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/*!
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* \brief Request number of bytes stored in tx FIFO
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* \param[in] base Module address
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* \return Number of bytes stored in tx FIFO
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*/
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inline alt_u16 usbFT232HGetNumberOfDataInTxFifo(alt_u32 base)
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{
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return (usbFT232HGetTxFifoStatus(base) & USB_FT232H_STATUS_DATA_SIZE_MSK);
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}
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/*!
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* \brief Write byte to module
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* \param[in] base Module address
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* \param[in] byte Byte for write to the FIFO
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*/
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inline void usbFT232HWriteByte(alt_u32 base, alt_u8 byte)
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{
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IOWR_8DIRECT(base, USB_FT232H_WRDATA_ADDR, byte);
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}
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/*!
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* \brief Read byte from the FIFO
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* \param[in] base Module address
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* \return Byte read from the FIFO
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*/
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inline alt_u8 usbFT232HReadByte(alt_u32 base)
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{
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return IORD_8DIRECT(base, USB_FT232H_RDDATA_ADDR);
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}
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#endif /* USB_FT232H_H_ */
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