forked from Imagelibrary/rtems
152 lines
6.5 KiB
C
152 lines
6.5 KiB
C
/*
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* Display driver for HCMS29xx
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*
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* This file declares the SPI based driver for a HCMS29xx 4 digit
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* alphanumeric LED display
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*/
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/*
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* Copyright (c) 2008 embedded brains GmbH. All rights reserved.
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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.org/license/LICENSE.
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*/
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#ifndef _DISP_HCMS29XX_H
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#define _DISP_HCMS29XX_H
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#include <rtems.h>
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#include <time.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DISP_HCMS29XX_TEXT_CNT (128)
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typedef struct {
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rtems_device_minor_number minor; /* minor device number */
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/*
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* in the disp_buffer, the string to be displayed is placed
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*/
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char disp_buffer[DISP_HCMS29XX_TEXT_CNT];
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int disp_buf_cnt; /* number of valid chars in disp_buffer */
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/*
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* in the trns buffer the string is transfered to display task
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*/
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char trns_buffer[DISP_HCMS29XX_TEXT_CNT];
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/*
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* in the dev_buffer, characters will be accumulated before display...
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*/
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char dev_buffer[DISP_HCMS29XX_TEXT_CNT];
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int dev_buf_cnt; /* number of valid chars in dev_buffer */
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rtems_id trns_sema_id; /* ID of disp trns buffer sema */
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rtems_id task_id; /* ID of disp task */
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bool rotate; /* FLAG: display is upside down */
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} spi_disp_hcms29xx_param_t;
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typedef struct {
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rtems_libi2c_drv_t libi2c_drv_entry;
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spi_disp_hcms29xx_param_t disp_param;
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} disp_hcms29xx_drv_t;
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/*
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* pass this descriptor pointer to rtems_libi2c_register_drv
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*/
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extern rtems_libi2c_drv_t *disp_hcms29xx_driver_descriptor;
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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rtems_device_driver disp_hcms29xx_dev_initialize
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| prepare the display device driver to accept write calls |
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| register device with its name |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_device_major_number major,
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rtems_device_minor_number minor,
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void *arg
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);
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| rtems_status_code |
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\*=========================================================================*/
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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rtems_device_driver disp_hcms29xx_dev_open
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| open the display device |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_device_major_number major,
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rtems_device_minor_number minor,
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void *arg
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);
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| rtems_status_code |
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\*=========================================================================*/
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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rtems_device_driver disp_hcms29xx_dev_write
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| write to display device |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_device_major_number major,
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rtems_device_minor_number minor,
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void *arg
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);
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| rtems_status_code |
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\*=========================================================================*/
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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rtems_device_driver disp_hcms29xx_dev_close
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| close the display device |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_device_major_number major,
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rtems_device_minor_number minor,
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void *arg
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);
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| rtems_status_code |
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\*=========================================================================*/
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#define DISP_HCMS29XX_DRIVER { \
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disp_hcms29xx_dev_initialize, \
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disp_hcms29xx_dev_open, \
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NULL, \
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disp_hcms29xx_dev_write, \
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NULL, \
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disp_hcms29xx_dev_close}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _DISP_HCMS29XX_H */
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