forked from Imagelibrary/rtems
129 lines
2.3 KiB
C
129 lines
2.3 KiB
C
/**
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* @file
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*
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* @ingroup mpc55xx_dspi
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*
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* @brief Header file for the LibI2C bus driver for the Deserial Serial Peripheral Interface (DSPI).
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*/
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/*
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* Copyright (c) 2008
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* Embedded Brains GmbH
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* Obere Lagerstr. 30
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* D-82178 Puchheim
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* Germany
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* rtems@embedded-brains.de
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*/
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/**
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* @defgroup mpc55xx_dspi Deserial Serial Peripheral Interface (DSPI)
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*
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* @ingroup mpc55xx
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*/
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#ifndef LIBCPU_POWERPC_MPC55XX_DSPI_H
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#define LIBCPU_POWERPC_MPC55XX_DSPI_H
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#include <rtems/libi2c.h>
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#include <mpc55xx/edma.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct DSPI_tag;
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typedef struct {
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edma_channel_context edma;
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rtems_id id;
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} mpc55xx_dspi_edma_entry;
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/**
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* @brief LibI2C bus driver entry.
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*/
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typedef struct {
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/**
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* @brief Standard bus driver fields.
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*/
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rtems_libi2c_bus_t bus;
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/**
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* @brief Index in the bus table: @ref mpc55xx_dspi_bus_table.
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*/
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unsigned table_index;
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/**
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* @brief Bus number (available after rtems_libi2c_register_bus()).
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*
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* @note You must set it in the initialization code after the bus registration.
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*/
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unsigned bus_number;
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/**
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* @brief Hardware registers.
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*/
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volatile struct DSPI_tag *regs;
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/**
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* @brief Selects SPI master or slave mode.
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*/
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bool master;
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/**
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* @brief Data for the Push Register.
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*/
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union DSPI_PUSHR_tag push_data;
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/**
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* @brief eDMA entry for transmission.
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*
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* The channel is fixed to a particular DSPI.
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*/
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mpc55xx_dspi_edma_entry edma_transmit;
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/**
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* @brief eDMA entry for push data generation.
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*
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* You can choose every available channel.
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*/
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mpc55xx_dspi_edma_entry edma_push;
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/**
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* @brief eDMA entry for receiving.
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*
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* The channel is fixed to a particular DSPI.
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*/
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mpc55xx_dspi_edma_entry edma_receive;
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/**
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* @brief Idle character transmitted in read only mode.
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*/
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uint32_t idle_char;
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/**
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* @brief Current baud.
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*/
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uint32_t baud;
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} mpc55xx_dspi_bus_entry;
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/**
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* @brief Number of DSPIs.
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*/
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#define MPC55XX_DSPI_NUMBER 4
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/**
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* @brief Table with bus driver entries.
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*/
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extern mpc55xx_dspi_bus_entry mpc55xx_dspi_bus_table [ /* MPC55XX_DSPI_NUMBER */ ];
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* LIBCPU_POWERPC_MPC55XX_DSPI_H */
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