https://wiki.st.com/stm32mpu-ecosystem-v1/index.php?title=DCMI_internal_peripheral&feed=atom&action=history
DCMI internal peripheral - Revision history
2024-03-28T15:35:05Z
Revision history for this page on the wiki
MediaWiki 1.31.16
https://wiki.st.com/stm32mpu-ecosystem-v1/index.php?title=DCMI_internal_peripheral&diff=68224&oldid=prev
Jean Christophe Trotin at 16:41, 12 February 2020
2020-02-12T16:41:13Z
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Jean Christophe Trotin
https://wiki.st.com/stm32mpu-ecosystem-v1/index.php?title=DCMI_internal_peripheral&diff=66540&oldid=prev
Gerald Baeza: /* Software frameworks */
2020-01-21T15:28:30Z
<p><span dir="auto"><span class="autocomment">Software frameworks</span></span></p>
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Gerald Baeza
https://wiki.st.com/stm32mpu-ecosystem-v1/index.php?title=DCMI_internal_peripheral&diff=62403&oldid=prev
Philippe Cornu at 08:39, 7 October 2019
2019-10-07T08:39:26Z
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Article purpose==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Article purpose==</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Visual peripherals]]</ins></div></td></tr>
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Philippe Cornu
https://wiki.st.com/stm32mpu-ecosystem-v1/index.php?title=DCMI_internal_peripheral&diff=49507&oldid=prev
Frq08988 at 16:14, 18 January 2019
2019-01-18T16:14:54Z
<p></p>
<p><b>New page</b></p><div><noinclude><br />
{{ArticleBasedOnModel | [[Internal peripheral article model]]}}<br />
{{ArticleMainWriter | HuguesF}}<br />
{{ArticleApprovedVersion | HuguesF | NathalieS, GeraldB, YannickF (Passed, TechnicalApprovalDate (29May'18 Passed) | No previous approved version | AnneJ - 12Jun'18 - 7657 | 12Jun'18}}<br />
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[[Category:Visual peripherals]]<br />
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<br />
==Article purpose==<br />
The purpose of this article is to<br />
* briefly introduce '''DCMI''' peripheral and its main features<br />
* indicate the level of security supported by this hardware block<br />
* explain how each instance can be allocated to the three runtime contexts and linked to the corresponding software components<br />
* explain, when needed, how to configure DCMI peripheral.<br />
<br />
==Peripheral overview==<br />
The '''DCMI''' (digital camera memory interface) is an STM32 internal peripheral allowing to receive some video data from an external parallel camera sensor device or any other digital video equipment supporting parallel interface.<br />
<br />
The DCMI hardware block can receive raw data frames in RGB565 and YUV422 formats as well as JPEG compressed data.<br />
<br />
===Features===<br />
Refer to [[STM32MP15 resources#Reference manuals|STM32MP15 reference manuals]] for the complete list of features, and to the software components, introduced below, to know which features are really implemented.<br />
<br />
Refer to STM32 DCMI presentation <ref>[http://www.st.com/content/ccc/resource/training/technical/product_training/group0/90/5a/91/24/1a/14/4b/40/STM32F7_Peripheral_DCMI/files/STM32F7_Peripheral_DCMI.pdf/jcr:content/translations/en.STM32F7_Peripheral_DCMI.pdf STM32 DCMI presentation]</ref> for an overview of DCMI hardware block and its capabilities.<br />
<br />
===Security support===<br />
The DCMI is a '''non-secure peripheral'''.<br />
<br />
==Peripheral usage and associated software==<br />
===Boot time===<br />
The DCMI is '''not used at boot time'''.<br />
<br />
===Runtime===<br />
====Overview====<br />
The DCMI internal peripheral can be allocated to:<br />
:* the Arm<sup>&reg;</sup> Cortex<sup>&reg;</sup>-A7 non-secure core to be used under Linux<sup>&reg;</sup> with the [[V4L2_camera_overview|V4L2 framework]]<br />
:* or to the Arm<sup>&reg;</sup> Cortex<sup>&reg;</sup> -M4 core to be used with STM32Cube MPU Package with [[STM32CubeMP1 architecture|DCMI HAL driver]]<br />
<br />
Chapter [[#Peripheral assignment]] describes which peripheral instance can be assigned to which context.<br />
<br />
====Software frameworks====<br />
{{:Internal_peripherals_software_table_template}}<br />
| rowspan="9" | High-speed interface<br />
| rowspan="9" | [[DCMI_internal_peripheral|DCMI]]<br />
|-<br />
|<br />
| [[V4L2_camera_overview|V4L2 framework]]<br />
| [[STM32CubeMP1 architecture|DCMI HAL driver]]<br />
|<br />
|-<br />
|}<br />
<br />
====Peripheral configuration====<br />
The configuration is applied by the firmware running in the context to which the peripheral is assigned. The configuration can be done alone via the [[STM32CubeMX]] tool for all internal peripherals, and then manually completed (particularly for external peripherals), according to the information given in the corresponding software framework article or in the [[DCMI device tree configuration]] article for Linux<sup>&reg;</sup>.<br />
<br />
====Peripheral assignment====<br />
{{:Internal_peripherals_assignment_table_template}}<br />
<onlyinclude><br />
| rowspan="1" | Visual<br />
| rowspan="1" | [[DCMI_internal_peripheral|DCMI]]<br />
| DCMI<br />
| <br />
|<span style="font-size:21px">☐</span> <br />
|<span style="font-size:21px">☐</span> <br />
| Assignment (single choice)<br />
|-<br />
</onlyinclude><br />
|}<br />
<br />
==How to go further==<br />
Refer to STM32 DCMI Application Note (AN5020)<ref>[http://www.st.com/content/ccc/resource/technical/document/application_note/group0/c0/ef/15/38/d1/d6/49/88/DM00373474/files/DM00373474.pdf/jcr:content/translations/en.DM00373474.pdf STM32 DCMI Application Note (AN5020)]</ref> for a detailed description of the DCMI peripheral and applicable use-cases.<br />
<br />
This application note is related to STM32 microcontrollers but it is also applicable to STM32 MPUs. This document can help to better understand stm32-dcmi V4L2 kernel driver and debug camera sensor and DCMI interactions.<br />
<br />
==References==<br />
<references/></div>
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