Initial data
And once there was a question ... How do I create an image for the board STM32F429I-Disco in "C" format for use with the BSP?
#ifndef __STLOGO_H
#define __STLOGO_H
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
__ALIGN_BEGIN const unsigned char stlogo[9174] __ALIGN_END =
{
0x42,0x4d,0xd6,0x23,0x00,0x00,0x00,0x00,0x00,0x00,0x36,0x00,0x00,0x00,0x28,0x00,
0x00,0x00,0x50,0x00,0x00,0x00,0x39,0x00,0x00,0x00,0x01,0x00,0x10,0x00,0x03,0x00,
0x00,0x00,0xa0,0x23,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
...
Data format
After examining the code section of the above, it became clear that this header structure BMP format. I think it was made for ease of use the image files from the SD memory card.
Also, based on the code of function void BSP_LCD_DrawBitmap(uint32_t X, uint32_t Y, uint8_t *pBmp) from file stm32f429i_discovery_lcd.c it can be assumed that code supports only the following data formats: A8R8G8B8, R5G6B5 and R8G8B8.
How can I display an image in this format?
There is a ready tool Bitmap Converter for emWin (BmpCvt.exe), which comes in STemwin package. You can certainly try it, but it's a simple way.
How to make the conversion using LCD Image Converter?
The simplest - is to decide that the conversion is not possible, as there is no ready-made presets for this. However, the problem is only in the reconstruction of the structure header BMP and filling them with the right data.
From Wiki article mentioned above, we can obtain the following structure:
typedef struct tagBITMAPFILEHEADER {
uint16_t bfType; // File type, 'BM', little-endian.
uint32_t bfSize; // Size of file, in bytes.
uint16_t bfReserved1;
uint16_t bfReserved2;
uint32_t bfOffBits; // Offset of pixel's data from file's start.
} BITMAPFILEHEADER; // 14 bytes
// Версия 3, BITMAPINFOHEADER.
typedef struct tagBITMAPINFOHEADER {
uint32_t biSize; // Size of this structure and its version.
int32_t biWidth; // Width of image, must be freater than 0.
int32_t biHeight; // Height of image, must be freater than 0.
uint16_t biPlanes; // Number of planes, must be equals to 1.
uint16_t biBitCount; // Count of bits per pixel.
uint32_t biCompression; // Compression type. At ST's file it equals to 3, but not used because biClrUsed == 0.
uint32_t biSizeImage; // Size of image's data, in bytes.
int32_t biXPelsPerMeter; // Equals to 0.
int32_t biYPelsPerMeter; // Equals to 0.
uint32_t biClrUsed; // Equals to 0.
uint32_t biClrImportant; // Equals to 0.
} BITMAPINFOHEADER; // 40 bytes
Template
Colors will be stored in R5G6B5 format, ie 16 bits.
For this purpose, it is more convenient to take as a storage unit uin16_t, instead uint8_t, which will affect the data in the header.
Template for filling such a structure, for the GCC compiler, will be as follows:
#ifndef $(doc_name_ws)_H_
#define $(doc_name_ws)_H_
#include <stdint.h>
// struct packing, pragma for GCC !!!
#pragma pack(push, 1)
$(start_block_images_table)
typedef struct $(doc_name_ws)_tagBITMAPFILEHEADER {
uint16_t bfType;
uint32_t bfSize;
uint16_t bfReserved1;
uint16_t bfReserved2;
uint32_t bfOffBits;
} $(doc_name_ws)_BITMAPFILEHEADER; // size is 14 bytes
typedef struct $(doc_name_ws)_tagBITMAPINFOHEADER {
uint32_t biSize;
uint32_t biWidth;
uint32_t biHeight;
uint16_t biPlanes;
uint16_t biBitCount;
uint32_t biCompression;
uint32_t biSizeImage;
uint32_t biXPelsPerMeter;
uint32_t biYPelsPerMeter;
uint32_t biClrUsed;
uint32_t biClrImportant;
} $(doc_name_ws)_BITMAPINFOHEADER; // size is 40 bytes
typedef struct $(doc_name_ws)_tag_Struct {
// offset 0, size 14
$(doc_name_ws)_BITMAPFILEHEADER fileHeader;
// offset 14, size 40
$(doc_name_ws)_BITMAPINFOHEADER infoHeader;
// offset 54, size $(out_blocks_count) words
uint16_t data[$(out_blocks_count)];
} $(doc_name_ws)_Struct;
$(doc_name_ws)_Struct $(doc_name_ws) = {
{
0x4d42u,
sizeof($(doc_name_ws)_BITMAPINFOHEADER) + sizeof($(doc_name_ws)_BITMAPFILEHEADER) + ($(out_blocks_count) * 2),
0x0000u,
0x0000u,
sizeof($(doc_name_ws)_BITMAPINFOHEADER) + sizeof($(doc_name_ws)_BITMAPFILEHEADER)
},
{
sizeof($(doc_name_ws)_BITMAPINFOHEADER),
$(out_image_width),
$(out_image_height),
1u,
$(out_bpp),
0x00000003u,
($(out_blocks_count) * 2),
0x00000000ul,
0x00000000ul,
0x00000000ul,
0x00000000ul
},
{
$(out_image_data)
}
};
$(end_block_images_table)
// struct packing, pragma for GCC !!!
#pragma pack (pop)
#endif /* $(doc_name_ws)_H_ */
Settings
Main window of application
Prepare.
Color's matrix for R5G6B5.
Image.
Template file.
Results
#ifndef butterfly_H_
#define butterfly_H_
#include <stdint.h>
// struct packing, pragma for GCC !!!
#pragma pack(push, 1)
typedef struct butterfly_tagBITMAPFILEHEADER {
uint16_t bfType;
uint32_t bfSize;
uint16_t bfReserved1;
uint16_t bfReserved2;
uint32_t bfOffBits;
} butterfly_BITMAPFILEHEADER; // size is 14 bytes
typedef struct butterfly_tagBITMAPINFOHEADER {
uint32_t biSize;
uint32_t biWidth;
uint32_t biHeight;
uint16_t biPlanes;
uint16_t biBitCount;
uint32_t biCompression;
uint32_t biSizeImage;
uint32_t biXPelsPerMeter;
uint32_t biYPelsPerMeter;
uint32_t biClrUsed;
uint32_t biClrImportant;
} butterfly_BITMAPINFOHEADER; // size is 40 bytes
typedef struct butterfly_tag_Struct {
// offset 0, size 14
butterfly_BITMAPFILEHEADER fileHeader;
// offset 14, size 40
butterfly_BITMAPINFOHEADER infoHeader;
// offset 54, size 76800 words
uint16_t data[76800];
} butterfly_Struct;
butterfly_Struct butterfly = {
{
0x4d42u,
sizeof(butterfly_BITMAPINFOHEADER) + sizeof(butterfly_BITMAPFILEHEADER) + (76800 * 2),
0x0000u,
0x0000u,
sizeof(butterfly_BITMAPINFOHEADER) + sizeof(butterfly_BITMAPFILEHEADER)
},
{
sizeof(butterfly_BITMAPINFOHEADER),
240,
320,
1u,
16,
0x00000003u,
(76800 * 2),
0x00000000ul,
0x00000000ul,
0x00000000ul,
0x00000000ul
},
{
0x19e2, 0x2202, 0x2202, 0x2242, 0x2262, 0x2262, 0x2ac3, 0x3b64, 0x3ba4, 0x3b84, 0x4ba5, 0x4bc5, 0x3b85, 0x3304, 0x2ac3, 0x2aa3, 0x2aa3, 0x2aa3, 0x2283, 0x2a83, 0x2aa3, 0x2aa3, 0x2ac3, 0x2ae3, 0x3324, 0x3b84, 0x43c5, 0x43e5, 0x4405, 0x4405, 0x4405, 0x4405, 0x4405, 0x4405, 0x4405, 0x43e4, 0x3363, 0x2262, 0x1942, 0x1102, 0x1102, 0x1102, 0x1102, 0x1922, 0x1942, 0x1962, 0x1962, 0x1942, 0x1942, 0x1922, 0x1902, 0x1902, 0x1922, 0x1943, 0x1963, 0x1983, 0x1963, 0x1943, 0x1943, 0x1922, 0x1922, 0x1943, 0x1963, 0x1983, 0x2163, 0x1963, 0x1922, 0x1102, 0x1982, 0x2222, 0x2b22, 0x43a4, 0x5445, 0x5466, 0x5c86, 0x5c86, 0x43a3, 0x2202, 0x08a1, 0x1081, 0x1081, 0x1081, 0x10a2, 0x18e3, 0x2103, 0x2123, 0x29a3, 0x2a23, 0x2263, 0x2283, 0x2aa3, 0x22a3, 0x2aa3, 0x22a3, 0x2ac3, 0x22c3, 0x2ac3, 0x2ac3, 0x2ac3, 0x2243, 0x1983, 0x18e2, 0x18c2, 0x18e3, 0x18e2, 0x1903, 0x18e2, 0x10e2, 0x10e2, 0x10e2, 0x10c2, 0x10a1, 0x10a1, 0x10c2, 0x10e2, 0x1102, 0x1902, 0x1902, 0x18e2, 0x18e2, 0x18e2, 0x1102, 0x1922, 0x1942, 0x1942, 0x1942, 0x1943, 0x1922, 0x1102, 0x10c2, 0x10a2, 0x10c2, 0x10c2, 0x10c2, 0x10e2, 0x1902, 0x1922, 0x1962, 0x19a3, 0x19c3, 0x19a3, 0x19a3, 0x21a3, 0x19c3, 0x19c3, 0x19c3, 0x19e3, 0x22a3, 0x43c6, 0x5c88, 0x64c9, 0x64c9, 0x64ca, 0x64ca, 0x64aa, 0x5caa, 0x5caa, 0x5caa, 0x5cc9, 0x5cca, 0x5caa, 0x5ca9, 0x64a9, 0x5c87, 0x43a4, 0x2ac2, 0x19c2, 0x21c2, 0x19a2, 0x1982, 0x1982, 0x1962, 0x1982, 0x22c1, 0x43c4, 0x6486, 0x64c8, 0x64c9, 0x5cc9, 0x5ca8, 0x54a8, 0x5488, 0x54a8, 0x54c8, 0x5cc8, 0x5c87, 0x43e4, 0x2ae2, 0x1a42, 0x2282, 0x22a2, 0x2b23, 0x43e4, 0x5445, 0x4c04, 0x3323, 0x1a02, 0x1102, 0x1902, 0x1963, 0x2223, 0x3304, 0x4385, 0x4c06, 0x5426, 0x5466, 0x64a6, 0x6ce6, 0x6d07, 0x7526, 0x6d26, 0x6d26, 0x6d26, 0x6d26, 0x6d06, 0x6d07, 0x5cc8, 0x5488, 0x5469, 0x5468, 0x4c68, 0x5448, 0x4c68, 0x5468, 0x5468, 0x5468, 0x4c68, 0x4c47, 0x4c68, 0x5448, 0x4c48, 0x4c27, 0x4c27, 0x4c27, 0x4c27, 0x4c27, 0x4406, 0x4407, 0x43e6, 0x3ba6,
...
0x64c0, 0x5c81, 0x43c1, 0x2b22, 0x2222, 0x1a22, 0x2242, 0x2243, 0x21e2, 0x1982, 0x1922, 0x10e2, 0x10e2, 0x10e2, 0x10e2, 0x10e2, 0x1942, 0x2223, 0x2ae3, 0x3b44, 0x4bc5, 0x6487, 0x6d29, 0x758a, 0x7d8a, 0x7daa, 0x7daa, 0x85ca, 0x85eb, 0x8deb, 0x8e0c, 0x85ec, 0x7dec, 0x85ec, 0x8e0c, 0x962c, 0x962c, 0x962c, 0x8e2c, 0x8e0c, 0x85ec, 0x85cc, 0x85ed, 0x960d, 0x962d, 0x960d, 0x8dcc, 0x858b, 0x7d4b, 0x752a, 0x752a, 0x6d29, 0x7509, 0x6d09, 0x6d09, 0x7509, 0x6ce8, 0x6487, 0x5446, 0x43e5, 0x3b84, 0x3364, 0x3344, 0x3344, 0x2b44, 0x3344, 0x3344, 0x3b85, 0x43e6, 0x4c27, 0x5c68, 0x5c88, 0x5c88, 0x5c67, 0x5427, 0x4bc5, 0x4364, 0x32a3, 0x2a03, 0x2983, 0x2963, 0x2963, 0x2122, 0x18e2, 0x1902, 0x1922, 0x3204, 0x4245, 0x4a65, 0x4244, 0x29c3, 0x1922, 0x10e2, 0x10a2, 0x2182, 0x4322, 0x6443, 0x7504, 0x7d84, 0x7da5, 0x7dc5, 0x7dc6, 0x7de6, 0x7dc6, 0x7de6, 0x7dc6, 0x7dc6, 0x7de7, 0x8608, 0x8e49, 0x9689, 0x9688, 0x9688, 0x8e68, 0x8e68, 0x85c7, 0x6d05, 0x4c03, 0x2b02, 0x3323, 0x4bc5, 0x6486, 0x7507, 0x8588, 0x8da8, 0x9609, 0x9628, 0x9628, 0x9648, 0x9648, 0x9668, 0x9688, 0x9668, 0x9648, 0x9648, 0x9629, 0x8587, 0x6cc6, 0x53e4, 0x4304, 0x4303, 0x3b23, 0x3b23, 0x3ac3, 0x3a43, 0x3a23, 0x31e3, 0x21c2, 0x21e2, 0x21e2, 0x2182, 0x1922, 0x10c2, 0x1081, 0x0861, 0x0861, 0x0861, 0x0861, 0x0841, 0x1081, 0x10c2, 0x1922, 0x1982, 0x21c2, 0x21e2, 0x2202, 0x2222, 0x2242, 0x2242, 0x2262, 0x2262, 0x2262, 0x2262, 0x2262, 0x2262, 0x2262, 0x2242, 0x2222, 0x21a3, 0x1922, 0x10c2, 0x1061, 0x0861, 0x0841, 0x0841, 0x0841, 0x0020, 0x0020, 0x0000, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0841, 0x1081, 0x1942, 0x5424, 0x8dc8, 0x85c9, 0x7d8a, 0x756a, 0x754b, 0x6d4a, 0x756b, 0x756b, 0x756b, 0x756b, 0x756a, 0x756a, 0x756a, 0x754b, 0x756a, 0x758a, 0x756a, 0x758a, 0x7d6b, 0x7d6c, 0x856d, 0x7d6d, 0x756c, 0x756c, 0x756c, 0x754b, 0x754a, 0x756b, 0x756b, 0x758b, 0x758b, 0x7d8b, 0x758b, 0x758b, 0x7d8b, 0x7d6c, 0x8dcd, 0xa60f, 0x8d8f, 0x752c, 0x6d2b
}
};
// struct packing, pragma for GCC !!!
#pragma pack (pop)
#endif /* butterfly_H_ */
