qr-scanner-test
===============
Proof-of-concept QR code scanner for STM32F4 discovery kit.
This code is based on the ZXing library. See https://code.google.com/p/zxing/ for
more information.
Hardware requirements
===============
The main board is the STM32F4 discovery kit.
See http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF252419 for more information.
The main board needs to be attached to 3 of element14's extension boards.
See http://www.element14.com/community/docs/DOC-51084?ICID=knode-STM32F4-cameramore for more information.
The following three boards are required:
- "Base Board": a breakout board
- "Digital Camera Module": contains a OV9655 camera
- "LCD module": contains a 3.5" colour LCD
Software requirments
===============
The firmware was compiled with IAR Embedded Workbench for ARM 6.70.
The resulting binary is large (> 100 kB), so the lite version is not sufficient.
With some work, it's probably possible to get it to compile using other toolchains.
Known problems
===============
- Memory use is inefficient
- Sometimes the firmware hangs due to out-of-memory issues
- Finder pattern search could be optimised by using ARM Cortex bit-banding
- OV9655 camera is somewhat unsuitable due to its inability to focus on
objects closer than about 1 foot
- Automatic exposure control gets confused by dark backgrounds and can end up
overexposing a bright QR code over a dark background
- Viewfinder shows output of binarizer, which looks terrible
- Viewfinder frame rate is slower than what is probably possible
STM32 实现二维码解码,用STM32F417，使用Zxing实现的二维码解码
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STM32 实现二维码解码,用STM32F417，使用Zxing实现的二维码解码 （241个子文件） 
system_stm32f4xx.c.bak 22KB Project.cspy.bat 2KB
logo.bmp 7KB cc936.c 697KB cc949.c 546KB cc950.c 433KB cc932.c 240KB stm32f4xx_tim.c 119KB ff.c 110KB stm32f4xx_rtc.c 99KB stm32f4_discovery_sdio_sd.c 85KB stm32f4xx_rcc.c 71KB stm32f4xx_adc.c 65KB stm32f4_discovery_audio_codec.c 58KB stm32f4xx_can.c 57KB stm32f4xx_usart.c 54KB stm32f4xx_i2c.c 50KB stm32f4xx_dma.c 50KB dcmi_ov9655.c 50KB stm32f4xx_spi.c 49KB fonts.c 45KB stm32f4xx_fsmc.c 40KB stm32f4_discovery_lcd.c 38KB stm32f4xx_sdio.c 38KB stm32f4xx_flash.c 36KB stm32f4xx_cryp.c 31KB ccsbcs.c 29KB stm32f4xx_dac.c 26KB stm32f4xx_hash.c 25KB stm32f4xx_pwr.c 24KB main.c 22KB system_stm32f4xx.c 21KB stm32f4xx_cryp_aes.c 21KB system_stm32f4xx.c 20KB stm32f4xx_gpio.c 20KB stm32f4xx_dcmi.c 18KB stm32f4_discovery.c 17KB stm32f4_discovery_lis302dl.c 15KB stm32f4xx_rng.c 13KB lcd_log.c 11KB misc.c 11KB stm32f4xx_wwdg.c 10KB stm32f4xx_exti.c 10KB stm32f4xx_cryp_tdes.c 10KB stm32f4xx_hash_sha1.c 9KB stm32f4xx_iwdg.c 9KB stm32f4xx_hash_md5.c 9KB stm32f4xx_cryp_des.c 9KB stm32f4xx_syscfg.c 7KB stm32f4xx_it.c 6KB stm32f4xx_dbgmcu.c 6KB bmp.c 6KB diskio.c 5KB syscall.c 5KB stm32f4_discovery_debug.c 4KB stm32f4xx_crc.c 3KB Version.cpp 29KB FinderPatternFinder.cpp 18KB DecodedBitStreamParser.cpp 14KB Detector.cpp 12KB HybridBinarizer.cpp 7KB FastHybridBinarizer.cpp 7KB GenericGFPoly.cpp 7KB AlignmentPatternFinder.cpp 7KB GlobalHistogramBinarizer.cpp 7KB StringUtils.cpp 6KB ReedSolomonDecoder.cpp 6KB BitMatrixParser.cpp 6KB PerspectiveTransform.cpp 5KB DecodeHints.cpp 5KB FormatInformation.cpp 5KB MultiFormatReader.cpp 4KB GridSampler.cpp 4KB BitArray.cpp 4KB DataBlock.cpp 4KB GenericGF.cpp 4KB DataMask.cpp 4KB ResultPoint.cpp 4KB CharacterSetECI.cpp 4KB BitMatrix.cpp 4KB Decoder.cpp 3KB main_bridge.cpp 3KB Mode.cpp 3KB FinderPattern.cpp 3KB BitSource.cpp 2KB BinaryBitmap.cpp 2KB LuminanceSource.cpp 2KB ErrorCorrectionLevel.cpp 2KB AlignmentPattern.cpp 2KB QRCodeReader.cpp 2KB Result.cpp 2KB Str.cpp 2KB DecoderResult.cpp 1KB FinderPatternInfo.cpp 1KB Binarizer.cpp 1KB Exception.cpp 1KB DetectorResult.cpp 1KB FormatException.cpp 1KB BarcodeFormat.cpp 1KB ResultIO.cpp 1KB共 241 条
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