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File indexing completed on 2025-05-11 08:23:43
0001 /* SPDX-License-Identifier: BSD-2-Clause */ 0002 0003 /* 0004 * Display driver for HCMS29xx 0005 * 0006 * This file declares the SPI based driver for a HCMS29xx 4 digit 0007 * alphanumeric LED display 0008 */ 0009 0010 /* 0011 * Copyright (c) 2008 embedded brains GmbH & Co. KG 0012 * 0013 * Redistribution and use in source and binary forms, with or without 0014 * modification, are permitted provided that the following conditions 0015 * are met: 0016 * 1. Redistributions of source code must retain the above copyright 0017 * notice, this list of conditions and the following disclaimer. 0018 * 2. Redistributions in binary form must reproduce the above copyright 0019 * notice, this list of conditions and the following disclaimer in the 0020 * documentation and/or other materials provided with the distribution. 0021 * 0022 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 0023 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 0024 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 0025 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 0026 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 0027 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 0028 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 0029 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 0030 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 0031 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 0032 * POSSIBILITY OF SUCH DAMAGE. 0033 */ 0034 0035 #ifndef _DISP_HCMS29XX_H 0036 #define _DISP_HCMS29XX_H 0037 #include <rtems.h> 0038 #include <time.h> 0039 0040 #ifdef __cplusplus 0041 extern "C" { 0042 #endif 0043 #define DISP_HCMS29XX_TEXT_CNT (128) 0044 0045 typedef struct { 0046 rtems_device_minor_number minor; /* minor device number */ 0047 /* 0048 * in the disp_buffer, the string to be displayed is placed 0049 */ 0050 char disp_buffer[DISP_HCMS29XX_TEXT_CNT]; 0051 int disp_buf_cnt; /* number of valid chars in disp_buffer */ 0052 /* 0053 * in the trns buffer the string is transfered to display task 0054 */ 0055 char trns_buffer[DISP_HCMS29XX_TEXT_CNT]; 0056 /* 0057 * in the dev_buffer, characters will be accumulated before display... 0058 */ 0059 char dev_buffer[DISP_HCMS29XX_TEXT_CNT]; 0060 int dev_buf_cnt; /* number of valid chars in dev_buffer */ 0061 0062 rtems_id trns_sema_id; /* ID of disp trns buffer sema */ 0063 rtems_id task_id; /* ID of disp task */ 0064 bool rotate; /* FLAG: display is upside down */ 0065 } spi_disp_hcms29xx_param_t; 0066 0067 typedef struct { 0068 rtems_libi2c_drv_t libi2c_drv_entry; 0069 spi_disp_hcms29xx_param_t disp_param; 0070 } disp_hcms29xx_drv_t; 0071 /* 0072 * pass this descriptor pointer to rtems_libi2c_register_drv 0073 */ 0074 extern rtems_libi2c_drv_t *disp_hcms29xx_driver_descriptor; 0075 0076 /*=========================================================================*\ 0077 | Function: | 0078 \*-------------------------------------------------------------------------*/ 0079 rtems_device_driver disp_hcms29xx_dev_initialize 0080 ( 0081 /*-------------------------------------------------------------------------*\ 0082 | Purpose: | 0083 | prepare the display device driver to accept write calls | 0084 | register device with its name | 0085 +---------------------------------------------------------------------------+ 0086 | Input Parameters: | 0087 \*-------------------------------------------------------------------------*/ 0088 rtems_device_major_number major, 0089 rtems_device_minor_number minor, 0090 void *arg 0091 ); 0092 /*-------------------------------------------------------------------------*\ 0093 | Return Value: | 0094 | rtems_status_code | 0095 \*=========================================================================*/ 0096 0097 /*=========================================================================*\ 0098 | Function: | 0099 \*-------------------------------------------------------------------------*/ 0100 rtems_device_driver disp_hcms29xx_dev_open 0101 ( 0102 /*-------------------------------------------------------------------------*\ 0103 | Purpose: | 0104 | open the display device | 0105 +---------------------------------------------------------------------------+ 0106 | Input Parameters: | 0107 \*-------------------------------------------------------------------------*/ 0108 rtems_device_major_number major, 0109 rtems_device_minor_number minor, 0110 void *arg 0111 ); 0112 /*-------------------------------------------------------------------------*\ 0113 | Return Value: | 0114 | rtems_status_code | 0115 \*=========================================================================*/ 0116 0117 /*=========================================================================*\ 0118 | Function: | 0119 \*-------------------------------------------------------------------------*/ 0120 rtems_device_driver disp_hcms29xx_dev_write 0121 ( 0122 /*-------------------------------------------------------------------------*\ 0123 | Purpose: | 0124 | write to display device | 0125 +---------------------------------------------------------------------------+ 0126 | Input Parameters: | 0127 \*-------------------------------------------------------------------------*/ 0128 rtems_device_major_number major, 0129 rtems_device_minor_number minor, 0130 void *arg 0131 ); 0132 /*-------------------------------------------------------------------------*\ 0133 | Return Value: | 0134 | rtems_status_code | 0135 \*=========================================================================*/ 0136 0137 /*=========================================================================*\ 0138 | Function: | 0139 \*-------------------------------------------------------------------------*/ 0140 rtems_device_driver disp_hcms29xx_dev_close 0141 ( 0142 /*-------------------------------------------------------------------------*\ 0143 | Purpose: | 0144 | close the display device | 0145 +---------------------------------------------------------------------------+ 0146 | Input Parameters: | 0147 \*-------------------------------------------------------------------------*/ 0148 rtems_device_major_number major, 0149 rtems_device_minor_number minor, 0150 void *arg 0151 ); 0152 /*-------------------------------------------------------------------------*\ 0153 | Return Value: | 0154 | rtems_status_code | 0155 \*=========================================================================*/ 0156 0157 #define DISP_HCMS29XX_DRIVER { \ 0158 disp_hcms29xx_dev_initialize, \ 0159 disp_hcms29xx_dev_open, \ 0160 NULL, \ 0161 disp_hcms29xx_dev_write, \ 0162 NULL, \ 0163 disp_hcms29xx_dev_close} 0164 0165 0166 #ifdef __cplusplus 0167 } 0168 #endif 0169 0170 #endif /* _DISP_HCMS29XX_H */
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