286 lines
10 KiB
C
286 lines
10 KiB
C
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/*!
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*******************************************************************************
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**
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** \file gd_ir.h
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**
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** \brief Infrared driver.
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**
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** The infrared driver is designed for GOKE decoder and
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** supports two functions:
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** - IR Receiver
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** - IR Transmitter
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**
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** The first one is to receive the remote controller signal and
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** decode it. The other function is to generate the infrared signal
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** and transmit it to other devices. The transmitter can be used to
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** control external devices for example a VCR or TV set.
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** The driver supports only the access to the hardware layer and
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** does not handle any IR protocols like RC5, RC6 or Kaseikyou.
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** These protocols have to be implemented on the top of this driver.
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**
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** The IR receiver is a pulse-width counter and is clocked by the
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** output of a 54MHz clocked pre-scaler.
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** Every time the pre-scaler generates an enable signal the IR
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** receiver checks if an edge on the input signal has occurred.
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** The edge sensitivity of the IR receiver is programmable.
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** After the time value is received, the upper level application
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** should analyse the stored data and parse them.
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**
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** The IR transmitter is a pulse generator. It consists of two
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** 32bit registers to hold the data to be sent and
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** a send_clock, a shift_clock, a compare and a mode register.
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** Each time the sent clock counter counts to 0, the phase of the
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** shift clock is inverted. The shift clock counter defines how
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** many shift clocks are needed before shifting the data by one bit.
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** The total number of 54MHz cycles per bit is therefore:
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** 2 x (prescaler +1) x (shift_clock_count + 1).
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**
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** In IRDA mode the compare register defines how many of the
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** sent clocks are output. When starting
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** the module the data of the first register are sent (MSB first).
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** When a data word (32bit) is finished the module checks if data
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** is available in the second register. If yes, this register is
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** copied into the first register and sent afterwards.
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** At the same time, an IRQ is generated to tell the system that
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** new data are required.
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** All data have to be written to register1 except the first 32bit
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** to be sent.
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**
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** Following are the IR sending out signal:
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**
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** \image html gd_ir_timings.gif
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**
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** - T1 = 2 x 1/54MHz x ( prescaler + 1 )
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** - T2 = T1 x ( shift_clock_count + 1 )
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** - T3 = T1 x ( comp_val + 1 )
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**
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** Copyright: 2012 - 2013 (C) GoKe Microelectronics ShangHai Branch
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**
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** \attention THIS SAMPLE CODE IS PROVIDED AS IS. GOKE MICROELECTRONICS
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** ACCEPTS NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR
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** OMMISSIONS.
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**
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** \version
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**
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******************************************************************************/
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#ifndef _GD_IR_H_
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#define _GD_IR_H_
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#include <gtypes.h>
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#include <gmodids.h>
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/*---------------------------------------------------------------------------*/
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/* constants and macros */
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/*---------------------------------------------------------------------------*/
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#ifdef BOARD_FPGA
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#define IR_INPUT_CLK 24000000 // for 27MHZ Crystal
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#else
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#define IR_INPUT_CLK 24000000 // for 24MHZ Crystal
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#endif
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#define IR_FREQ 38 // for NEC unit:MHz
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/********************************/
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/* IRQ_EN_MASK Register */
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/********************************/
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#define IRQ_EN_RTC (1<<0)
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#define IRQ_EN_IRR (1<<1)
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#define IRQ_EN_GPIO (1<<3)
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#define IRQ_EN_IRT (1<<6)
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#define GD_IR_ERR_BASE (GD_IR_MODULE_ID<<16) //!< Error base value.
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#define GD_IR_EDGE_FLAG 0x0100
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#define GD_IR_VAL_BIT_MASK 0x00FF
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#define GD_IR_TRANSFER_MAX_DATA 32
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/*!
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*******************************************************************************
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**
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** \brief IR driver error codes.
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**
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******************************************************************************/
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enum
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{
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GD_ERR_IR_NO_SEQUENCE = GD_IR_ERR_BASE, //!< No sequence stored in IR buffer.
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GD_ERR_IR_TRANSMIT_INPROCESS, //!< IR transmission not finished yet.
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GD_ERR_IR_TRANSMIT_FAILURE, //!< IR transmission failed.
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};
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/*---------------------------------------------------------------------------*/
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/* types, enums and structures */
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/*---------------------------------------------------------------------------*/
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/*!
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*******************************************************************************
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**
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** \brief IR type definitions.
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**
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******************************************************************************/
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typedef enum
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{
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GD_IR_RECEIVER = 1, //!< Receiver function.
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GD_IR_TRANSMITTER, //!< Transmitter function.
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} GD_IR_TYPE_E;
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/*!
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*******************************************************************************
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**
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** \brief IR driver status.
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**
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******************************************************************************/
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typedef enum
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{
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GD_IR_RECEIVER_OPENED = 1, //!< IR receiver is open.
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GD_IR_TRANSMITTER_OPENED = 2, //!< IR transmitter is open.
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} GD_IR_STATUS_E;
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/*!
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*******************************************************************************
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**
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** \brief Transmitter configuration parameters.
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**
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******************************************************************************/
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typedef struct
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{
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U8 programming; //!< Programming register configuration.
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U16 prescaler; //!< IRDA clock register configuration.
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U8 shift_counter; //!< IRDA shift clock register configuration.
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U8 compare_value; //!< Compare value register configuration.
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S8 gpioIrtPin; //!< GPIO Pin to be assigned for IRT function.
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} GD_IR_TRANS_CONFIG_S;
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/*!
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*******************************************************************************
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**
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** \brief Receiver configuration parameters.
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**
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******************************************************************************/
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typedef struct
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{
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U16 prescaler; //!< Prescaler for IR receiver.
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S8 gpioIrrPin; //!< GPIO Pin to be assigned for IRR function.
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} GD_IR_RECEV_CONFIG_S;
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/*!
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*******************************************************************************
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**
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** \brief Driver init parameters.
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**
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** \sa GD_IR_Init()
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**
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******************************************************************************/
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typedef struct
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{
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void (*notifyFunction)(); //!< Pointer to notification function.
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} GD_IR_INIT_PARAMS_S;
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/*!
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*******************************************************************************
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**
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** \brief Open parameters.
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**
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** \sa GD_IR_Open()
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**
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******************************************************************************/
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typedef struct
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{
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GD_IR_TYPE_E type; //!< Receiver or transmitter.
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GD_IR_TRANS_CONFIG_S irt_config_s; //!< Configuration of transmitter.
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GD_IR_RECEV_CONFIG_S irr_config_s; //!< Configuration of receiver.
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} GD_IR_OPEN_PARAMS_S;
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/*!
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*******************************************************************************
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**
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** \brief Data property for IR transmitter.
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**
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** This structure defines the property of the transmitting
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** data, the width for logic 1 and logic 0
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** and the valid bits of the value of width.
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**
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** \sa GD_IR_SetParams()
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**
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******************************************************************************/
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typedef struct
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{
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U16 nValidbit0; //!< Valid bits of the value for logic 0.
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U16 bitvalue0; //!< Value for logic 0.
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U16 nValidbit1; //!< Valid bits of the value for logic 1.
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U16 bitvalue1; //!< Value for logic 1.
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} GD_IR_DATA_PROPERTY_S;
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/*!
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*******************************************************************************
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**
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** \brief Insert data structure for IR transmitter.
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**
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** This structure defines the header and footer or some other parts
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** for the transmitter to insert the logic 0 or logic 1 into the
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** output buffer.
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**
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** \sa GD_IR_SetParams()
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**
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******************************************************************************/
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typedef struct
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{
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U16 number; //!< Number of logic bit to be inserted.
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U8 bit; //!< Logic 0 or logic 1.
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} GD_IR_INSERT_S;
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/*!
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*******************************************************************************
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**
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** \brief Output data structure for IR transmitter.
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**
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** This structure defines the data value and the valid bits of this
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** data.
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**
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** \sa GD_IR_SetParams()
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**
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******************************************************************************/
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typedef struct
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{
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U8 value; //!< Data value in byte.
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U8 validbit; //!< Valid bit of this data.
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} GD_IR_DATA_S;
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/*---------------------------------------------------------------------------*/
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/* function prototypes */
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/*---------------------------------------------------------------------------*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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GERR GD_IR_Close(GD_HANDLE *pHandle);
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GERR GD_IR_Init(GD_IR_INIT_PARAMS_S *pInitParams);
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GERR GD_IR_IrtOpen(GD_IR_OPEN_PARAMS_S *pOpenParams, GD_HANDLE *pHandle);
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GERR GD_IR_IrrOpen(GD_IR_OPEN_PARAMS_S *pOpenParams, GD_HANDLE *pHandle);
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GERR GD_IR_Receive(GD_HANDLE handle, U16 *pData, U16 num);
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void GD_IR_SetNotifyFunction(void(*nfyFunc)());
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GERR GD_IR_SetParams(GD_HANDLE handle,
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GD_IR_INSERT_S *header,
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U8 nheader,
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GD_IR_DATA_S *data,
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U8 ndata,
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GD_IR_DATA_PROPERTY_S *dataproperty,
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GD_IR_INSERT_S* footer,
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U8 nfooter,
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U32 *pSendBuffer,
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U16 *pSendNumber);
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GERR GD_IR_Status(GD_HANDLE handle, U16* pNum);
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GERR GD_IR_Transmit(GD_HANDLE handle, U32 *pData, U16 num);
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typedef void (*GD_RTC_NOTIFY)(void);
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void GD_RTC_RegisterNotify(GD_RTC_NOTIFY rtcNotifyFunc,U32 preCount);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GD_IR_H_ */
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/* end of gd_ir.h */
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