STM32F746G-DISCO Data Transfer Speed (DTS) Benchmark

✅ QSPI Performance Test (BSP QSPI N25Q128A)

• Flash Size: 16,777,216 bytes (16MB)
• Erase Sector Size: 4,096 bytes (4KB)
• Erase Sectors Number: 4,096
• Program Page Size: 256 bytes
• Program Pages Number: 65,536

Erase Test

• Total Erase Time: 123,251 ms (~123.25 sec)

64KB Block Test

• Erase Time: 0.27 sec
• Write Time: 0.193 sec
  • Speed: 331.61 KB/s
• Read Time: 0.027 sec
  • Speed: 2370.37 KB/s
• ✅ Test Completed Successfully: Data written and verified correctly!

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✅ SDRAM Speed Test

6MB Write Test

Data Type	Time (ms)	Speed (MB/s)
uint8_t	314 ms	19.11 MB/s
uint16_t	158 ms	37.97 MB/s
uint32_t	86 ms	69.77 MB/s
uint64_t	52 ms	115.38 MB/s

6MB Read Test

Data Type	Time (ms)	Speed (MB/s)
uint8_t	460 ms	13.04 MB/s
uint16_t	240 ms	25.00 MB/s
uint32_t	117 ms	51.28 MB/s
uint64_t	74 ms	81.08 MB/s

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✅ SD Card Speed Test (BSP FatFs SDMMC WideBus DMA)

4-bit WideBus, Fat32, DMA, 50MHz

Buffer Size	Write Speed (KB/s)
512B	77.00 KB/s
1KB	951.26 KB/s
2KB	1882.82 KB/s
4KB	3494.82 KB/s
8KB	5688.95 KB/s
16KB	6243.90 KB/s
32KB	6249.35 KB/s
64KB	❌ Error: Failed to open/create file!
56KB	9524.16 KB/s

4-bit WideBus (50MHz), 20MB File Test

• Format Time: 1284 ms
• Write Time: 2995 ms
  • Speed: 6838.06 KB/s
• Read Time: 2079 ms
  • Speed: 9850.89 KB/s

1-bit WideBus (50MHz), 20MB File Test

• Format Time: 2029 ms
• Write Time: 8009 ms
  • Speed: 2557.12 KB/s
• Read Time: 7178 ms
  • Speed: 2853.16 KB/s

4-bit WideBus, Fat32, DMA, 100MHz

• Format Time: 1249 ms
• Write Time: 2292 ms
  • Speed: 8935.43 KB/s
• Read Time: 1283 ms
  • Speed: 15962.59 KB/s

4-bit WideBus, Fat32, DMA, 150MHz

• Format Time: 1248 ms
• Write Time: 2044 ms
  • Speed: 10019.57 KB/s
• Read Time: 1168 ms
  • Speed: 17534.25 KB/s

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✅ USB HS & Additional Notes

• QSPI sectors require erasing before writing, causing slow performance.
• USB media buffer is crucial for speed optimization.
• SDRAM operates at near drag-and-drop speed.
• Encountered issues with SDMMC in 4-bit WideBus mode, but achieved stable operation in 1-bit mode.
• Further optimizations and testing are required. 🚀