Outline ![]()
Files ![]()
loading...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/**
******************************************************************************
* @file stm32f4xx_hal_ltdc_ex.c
* @author MCD Application Team
* @brief LTDC Extension HAL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/** @addtogroup STM32F4xx_HAL_Driver
* @{
*/
#if defined(HAL_LTDC_MODULE_ENABLED) && defined(HAL_DSI_MODULE_ENABLED)
#if defined (LTDC) && defined (DSI)
/** @defgroup LTDCEx LTDCEx
* @brief LTDC HAL module driver
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup LTDCEx_Exported_Functions LTDC Extended Exported Functions
* @{
*/
/** @defgroup LTDCEx_Exported_Functions_Group1 Initialization and Configuration functions
* @brief Initialization and Configuration functions
*
@verbatim
===============================================================================
##### Initialization and Configuration functions #####
===============================================================================
[..] This section provides functions allowing to:
(+) Initialize and configure the LTDC
@endverbatim
* @{
*/
/**
* @brief Retrieve common parameters from DSI Video mode configuration structure
* @param hltdc pointer to a LTDC_HandleTypeDef structure that contains
* the configuration information for the LTDC.
* @param VidCfg pointer to a DSI_VidCfgTypeDef structure that contains
* the DSI video mode configuration parameters
* @note The implementation of this function is taking into account the LTDC
* polarities inversion as described in the current LTDC specification
* @retval HAL status
*/
HAL_StatusTypeDef HAL_LTDCEx_StructInitFromVideoConfig(LTDC_HandleTypeDef *hltdc, DSI_VidCfgTypeDef *VidCfg)
{
/* Retrieve signal polarities from DSI */
/* The following polarity is inverted:
LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH */
#if !defined(POLARITIES_INVERSION_UPDATED)
/* Note 1 : Code in line w/ Current LTDC specification */
hltdc->Init.DEPolarity = (VidCfg->DEPolarity == \
DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
hltdc->Init.VSPolarity = (VidCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AH : LTDC_VSPOLARITY_AL;
hltdc->Init.HSPolarity = (VidCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AH : LTDC_HSPOLARITY_AL;
#else
/* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
hltdc->Init.DEPolarity = VidCfg->DEPolarity << 29;
hltdc->Init.VSPolarity = VidCfg->VSPolarity << 29;
hltdc->Init.HSPolarity = VidCfg->HSPolarity << 29;
#endif /* POLARITIES_INVERSION_UPDATED */
/* Retrieve vertical timing parameters from DSI */
hltdc->Init.VerticalSync = VidCfg->VerticalSyncActive - 1U;
hltdc->Init.AccumulatedVBP = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch - 1U;
hltdc->Init.AccumulatedActiveH = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + \
VidCfg->VerticalActive - 1U;
hltdc->Init.TotalHeigh = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + \
VidCfg->VerticalActive + VidCfg->VerticalFrontPorch - 1U;
return HAL_OK;
}
/**
* @brief Retrieve common parameters from DSI Adapted command mode configuration structure
* @param hltdc pointer to a LTDC_HandleTypeDef structure that contains
* the configuration information for the LTDC.
* @param CmdCfg pointer to a DSI_CmdCfgTypeDef structure that contains
* the DSI command mode configuration parameters
* @note The implementation of this function is taking into account the LTDC
* polarities inversion as described in the current LTDC specification
* @retval HAL status
*/
HAL_StatusTypeDef HAL_LTDCEx_StructInitFromAdaptedCommandConfig(LTDC_HandleTypeDef *hltdc, DSI_CmdCfgTypeDef *CmdCfg)
{
/* Retrieve signal polarities from DSI */
/* The following polarities are inverted:
LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH
LTDC_VSPOLARITY_AL <-> LTDC_VSPOLARITY_AH
LTDC_HSPOLARITY_AL <-> LTDC_HSPOLARITY_AH)*/
#if !defined(POLARITIES_INVERSION_UPDATED)
/* Note 1 : Code in line w/ Current LTDC specification */
hltdc->Init.DEPolarity = (CmdCfg->DEPolarity == \
DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
hltdc->Init.VSPolarity = (CmdCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AL : LTDC_VSPOLARITY_AH;
hltdc->Init.HSPolarity = (CmdCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AL : LTDC_HSPOLARITY_AH;
#else
/* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
hltdc->Init.DEPolarity = CmdCfg->DEPolarity << 29;
hltdc->Init.VSPolarity = CmdCfg->VSPolarity << 29;
hltdc->Init.HSPolarity = CmdCfg->HSPolarity << 29;
#endif /* POLARITIES_INVERSION_UPDATED */
return HAL_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* LTDC && DSI */
#endif /* HAL_LTCD_MODULE_ENABLED && HAL_DSI_MODULE_ENABLED */
/**
* @}
*/