ST STM32CubeH7, Руководство пользователя

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Footprint UM2222
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7 Footprint
The purpose of the following sections is to provide the memory requirements for all the
demonstration modules, including JPEG decoder and STemWin main GUI components. The
aim is to have an estimation of memory requirement in case of suppression or addition of a
module or a feature.
The footprint data is provided for the following environment:
•
Toolchain: IAR 7.80
• Optimization: high size
•
Board: STM32H743I-EVAL.
Table 6 shows the code memory, data memory and constant memory used for each module.
7.1 STemWin features resources
7.1.1 JPEG decoder
The JPEG decompression uses approximately 33 Kbytes of RAM for decompression
independently of the image size and an amount of bytes depends on the image size. The
RAM requirement can be calculated as follows:
Approximate RAM requirement = X-Size of image * 80 bytes + 33 Kbytes.
Table 6. Modules footprint
(1)
1. All the resources used in the demonstration are stored in the Quad-SPI Flash memory.
Module
Code memory
(bytes)
Data memory
(bytes)
Constant memory
(bytes)
Audio 5688 26876 1318945
Video 5424 100228 231664
Graphic effect 2260 112 10041307
Clock & weather 6032 844 3061328
Rocket games 2052 484 1715108
System info 1152 0 120164
Table 7. RAM requirements for some JPEG resolutions
Resolution RAM usage (Kbytes)
RAM usage, size dependent
(Kbytes)
160x120 45.5 12.5
320x340 58.0 25.0
480x272 70.5 37.5
640x480 83.0 50.0