STM32F4串口DMA双缓冲模式DEMO_DMA双缓冲资源-CSDN文库

共1137个文件

c：594个

h：286个

s：78个

STM32

DMA

串口

ARM

需积分: 48 113 浏览量 2022-09-01 17:00:56 上传评论 5 收藏 19.32MB RAR 举报

STM32F4系列是意法半导体（STMicroelectronics）推出的高性能ARM Cortex-M4微控制器，广泛应用在嵌入式系统设计中。在这个串口DMA双缓冲模式DEMO中，我们主要探讨的是如何利用STM32F4的串行通信接口（UART）与DMA（Direct Memory Access）功能来实现高效的数据传输。 1. **STM32F4串口通信**：STM32F4的UART接口支持多种波特率，最高可达几Mbps，可以实现串行数据的发送和接收。在这个DEMO中，提到的2M波特率表示每秒钟可以传输2M位数据，这对于快速数据交换是至关重要的。 2. **DMA技术**：DMA允许外设直接访问内存，无需CPU干预，从而减少了CPU的负担，提高了系统的整体效率。在串口通信中，使用DMA可以实现连续、无阻塞的数据传输，尤其是在处理大数据量或者需要实时性的应用中。 3. **双缓冲机制**：双缓冲是一种优化数据传输的方法，它使用两个独立的缓冲区交替进行读写操作。当一个缓冲区正在被串口传输时，另一个缓冲区可以被CPU准备新的数据。这样可以避免因数据准备不足导致的传输中断，提高传输连续性。 4. **空闲中断**：空闲中断是UART的一种中断类型，当串口检测到数据线处于空闲状态（即没有数据传输）时触发。在这里，空闲中断可能用于检测传输完成或者为新的数据传输做准备。 5. **FIFO循环**：FIFO（First In First Out）是串口通信中的数据缓冲区管理方式，确保数据按顺序处理。循环FIFO意味着一旦一个缓冲区满，就会自动切换到另一个缓冲区，保持数据的连续传输。 6. **不定长数据**：在实际应用中，数据长度可能会变化。这个DEMO实现了处理不定长度数据的能力，适应各种不同大小的数据包，增加了系统的灵活性。通过以上这些特性，这个STM32F4串口DMA双缓冲模式DEMO可以有效地应用于需要高速、稳定串行通信的项目，如远程传感器数据采集、无线模块通信等。开发者可以根据项目需求调整代码，以满足特定的波特率、缓冲区大小和中断处理策略。在实际应用中，理解并掌握这些技术有助于优化系统的性能和可靠性。

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收起资源包目录

STM32F4串口DMA双缓冲模式DEMO （1137个子文件）

libarm_cortexM4l_math.a 2.99MB

libarm_cortexM4lf_math.a 2.95MB

iar_cortexM4b_math.a 2.83MB

iar_cortexM4l_math.a 2.82MB

iar_cortexM4bf_math.a 2.8MB

iar_cortexM4lf_math.a 2.8MB

BGV8000.uvguix.Administrator 174KB

BGV8000.axf 771KB

arm_linear_interp_data.c 4.12MB

arm_common_tables.c 987KB

arm_dct4_init_f32.c 809KB

arm_dct4_init_q31.c 637KB

arm_dct4_init_q15.c 494KB

arm_rfft_init_f32.c 341KB

arm_rfft_init_q31.c 326KB

transform_tests_common_data.c 273KB

arm_rfft_init_q15.c 252KB

stm32f4xx_hal_tim.c 245KB

stm32f4xx_hal_i2c.c 241KB

stm32f4xx_hal_fmpi2c.c 238KB

stm32f4xx_hal_cryp.c 235KB

stm32f4xx_hal_rcc_ex.c 155KB

stm32f4xx_hal_dfsdm.c 154KB

stm32f4xx_hal_uart.c 133KB

stm32f4xx_hal_hash.c 132KB

stm32f4xx_hal_spi.c 125KB

stm32f4xx_hal_eth.c 110KB

stm32f4xx_hal_sd.c 102KB

stm32f4xx_hal_mmc.c 102KB

stm32f4xx_hal_usart.c 102KB

stm32f4xx_hal_fmpsmbus.c 102KB

stm32f4xx_hal_qspi.c 96KB

stm32f4xx_hal_smbus.c 96KB

stm32f4xx_hal_irda.c 96KB

stm32f4xx_hal_dsi.c 89KB

stm32f4xx_hal_smartcard.c 85KB

stm32f4xx_hal_tim_ex.c 83KB

stm32f4xx_hal_sai.c 82KB

stm32f4xx_hal_can.c 81KB

stm32f4xx_hal_adc.c 78KB

stm32f4xx_hal_nand.c 77KB

stm32f4xx_hal_lptim.c 76KB

stm32f4xx_hal_dma2d.c 73KB

stm32f4xx_hal_ltdc.c 73KB

stm32f4xx_hal_i2s.c 70KB

stm32f4xx_hal_rtc.c 67KB

stm32f4xx_hal_pcd.c 64KB

filtering_test_common_data.c 64KB

stm32f4xx_ll_usb.c 63KB

stm32f4xx_hal_rtc_ex.c 61KB

stm32f4xx_ll_fmc.c 56KB

arm_cfft_radix4_q15.c 55KB

stm32f4xx_hal_spdifrx.c 54KB

stm32f4xx_ll_rcc.c 51KB

stm32f4xx_ll_sdmmc.c 51KB

stm32f4xx_hal_flash_ex.c 50KB

stm32f4xx_hal_hcd.c 49KB

stm32f4xx_hal_hash_ex.c 48KB

stm32f4xx_hal_nor.c 47KB

stm32f4xx_hal_dac.c 46KB

stm32f4xx_ll_tim.c 45KB

arm_fft_bin_data.c 43KB

arm_conv_partial_fast_q15.c 43KB

stm32f4xx_ll_adc.c 43KB

stm32f4xx_hal_rcc.c 42KB

stm32f4xx_hal_adc_ex.c 42KB

stm32f4xx_ll_fsmc.c 40KB

stm32f4xx_hal_sdram.c 40KB

stm32f4xx_hal_dma.c 40KB

arm_cfft_radix4_q31.c 39KB

stm32f4xx_hal_i2s_ex.c 39KB

arm_conv_fast_q15.c 38KB

stm32f4xx_hal_dcmi.c 38KB

arm_correlate_fast_q15.c 36KB

arm_cfft_radix4_f32.c 34KB

stm32f4xx_hal_sram.c 34KB

controller_test_common_data.c 33KB

stm32f4xx_hal_cec.c 32KB

stm32f4xx_ll_utils.c 32KB

stm32f4xx_hal_pccard.c 30KB

stm32f4xx_ll_rtc.c 30KB

arm_fir_f32.c 28KB

system_stm32f4xx.c 27KB

fir_tests.c 26KB

fast_math_tests_common_data.c 26KB

stm32f4xx_hal_rng.c 26KB

conv_tests.c 25KB

arm_conv_partial_q15.c 25KB

stm32f4xx_hal_flash.c 24KB

arm_correlate_q7.c 24KB

arm_conv_partial_q7.c 24KB

stm32f4xx_ll_spi.c 23KB

stm32f4xx_ll_dma2d.c 23KB

stm32f4xx_hal_pwr_ex.c 23KB

arm_graphic_equalizer_example_q31.c 23KB

biquad.c 23KB

arm_correlate_f32.c 22KB

arm_mat_inverse_f64.c 22KB

arm_mat_inverse_f32.c 22KB

共 1137 条

T0D54 010:681.974 SEGGER J-Link V7.60h Log File T0D54 010:682.168 DLL Compiled: Feb 9 2022 14:10:33 T0D54 010:682.196 Logging started @ 2022-09-01 00:25 T0D54 010:682.221 - 10682.233ms T0D54 010:682.254 JLINK_SetWarnOutHandler(...) T0D54 010:682.280 - 0.039ms T0D54 010:682.308 JLINK_OpenEx(...) T0D54 010:687.213 Firmware: J-Link OB-STM32F072-CortexM compiled Jan 7 2019 14:09:37 T0D54 010:689.211 Firmware: J-Link OB-STM32F072-CortexM compiled Jan 7 2019 14:09:37 T0D54 010:689.629 Decompressing FW timestamp took 344 us T0D54 010:701.222 Hardware: V1.00 T0D54 010:701.291 S/N: 4294967295 T0D54 010:701.331 OEM: SEGGER T0D54 010:701.368 Feature(s): GDB, RDI, FlashBP, FlashDL, JFlash, RDDI T0D54 010:706.404 TELNET listener socket opened on port 19021 T0D54 010:706.640 WEBSRV WEBSRV_Init(): Starting webserver thread(s) T0D54 010:707.014 WEBSRV Webserver running on local port 19080 T0D54 010:710.070 - 27.800ms returns "O.K." T0D54 010:710.142 JLINK_SetErrorOutHandler(...) T0D54 010:710.169 - 0.039ms T0D54 010:710.210 JLINK_ExecCommand("ProjectFile = "C:\Users\Administrator\Documents\BGV8000\MDK-ARM\JLinkSettings.ini"", ...). T0D54 010:730.950 Ref file found at: D:\Program Files\KEIL\ARM\Segger\JLinkDevices.ref T0D54 010:731.036 XML referenced by ref file: C:\Program Files\SEGGER\JLink\JLinkDevices.xml T0D54 010:731.847 C:\Program Files\SEGGER\JLink\JLinkDevices.xml evaluated successfully. T0D54 010:754.364 - 44.164ms returns 0x00 T0D54 010:754.408 JLINK_ExecCommand("Device = STM32F412RETx", ...). T0D54 010:756.169 Device "STM32F412RE" selected. T0D54 010:756.447 - 2.033ms returns 0x00 T0D54 010:756.464 JLINK_ExecCommand("DisableConnectionTimeout", ...). T0D54 010:756.478 - 0.006ms returns 0x01 T0D54 010:756.489 JLINK_GetHardwareVersion() T0D54 010:756.499 - 0.014ms returns 10000 T0D54 010:756.510 JLINK_GetDLLVersion() T0D54 010:756.520 - 0.014ms returns 76008 T0D54 010:756.531 JLINK_GetOEMString(...) T0D54 010:756.541 JLINK_GetFirmwareString(...) T0D54 010:756.551 - 0.014ms T0D54 010:756.574 JLINK_GetDLLVersion() T0D54 010:756.584 - 0.015ms returns 76008 T0D54 010:756.596 JLINK_GetCompileDateTime() T0D54 010:756.606 - 0.014ms T0D54 010:756.620 JLINK_GetFirmwareString(...) T0D54 010:756.630 - 0.014ms T0D54 010:756.643 JLINK_GetHardwareVersion() T0D54 010:756.652 - 0.014ms returns 10000 T0D54 010:756.666 JLINK_GetSN() T0D54 010:756.676 - 0.015ms returns -1 T0D54 010:756.687 JLINK_GetOEMString(...) T0D54 010:756.703 JLINK_TIF_Select(JLINKARM_TIF_SWD) T0D54 010:760.920 - 4.254ms returns 0x00 T0D54 010:760.972 JLINK_HasError() T0D54 010:760.993 JLINK_SetSpeed(2000) T0D54 010:761.903 - 0.937ms T0D54 010:761.946 JLINK_GetId() T0D54 010:763.014 InitTarget() start T0D54 010:763.050 J-Link Script File: Executing InitTarget() T0D54 010:787.920 InitTarget() end T0D54 010:790.006 Found SW-DP with ID 0x2BA01477 T0D54 010:794.932 Old FW that does not support reading DPIDR via DAP jobs T0D54 010:796.948 DPv0 detected T0D54 010:797.051 CoreSight SoC-400 or earlier T0D54 010:797.139 Scanning AP map to find all available APs T0D54 010:798.974 AP[1]: Stopped AP scan as end of AP map has been reached T0D54 010:799.107 AP[0]: AHB-AP (IDR: 0x24770011) T0D54 010:799.186 Iterating through AP map to find AHB-AP to use T0D54 010:800.973 AP[0]: Core found T0D54 010:801.096 AP[0]: AHB-AP ROM base: 0xE00FF000 T0D54 010:801.987 CPUID register: 0x410FC241. Implementer code: 0x41 (ARM) T0D54 010:802.121 Found Cortex-M4 r0p1, Little endian. T0D54 010:905.399 -- Max. mem block: 0x00002340 T0D54 010:906.416 CPU_ReadMem(4 bytes @ 0xE000EDF0) T0D54 010:907.421 CPU_ReadMem(4 bytes @ 0xE0002000) T0D54 010:908.463 FPUnit: 6 code (BP) slots and 2 literal slots T0D54 010:908.625 CPU_ReadMem(4 bytes @ 0xE000EDFC) T0D54 010:909.416 CPU_WriteMem(4 bytes @ 0xE000EDFC) T0D54 010:910.419 CPU_ReadMem(4 bytes @ 0xE0001000) T0D54 010:911.294 CPU_WriteMem(4 bytes @ 0xE0001000) T0D54 010:912.312 CPU_ReadMem(4 bytes @ 0xE000ED88) T0D54 010:913.279 CPU_WriteMem(4 bytes @ 0xE000ED88) T0D54 010:914.302 CPU_ReadMem(4 bytes @ 0xE000ED88) T0D54 010:915.301 CPU_WriteMem(4 bytes @ 0xE000ED88) T0D54 010:916.331 CoreSight components: T0D54 010:916.471 ROMTbl[0] @ E00FF000 T0D54 010:916.554 CPU_ReadMem(64 bytes @ 0xE00FF000) T0D54 010:918.270 CPU_ReadMem(32 bytes @ 0xE000EFE0) T0D54 010:919.323 [0][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7 T0D54 010:919.449 CPU_ReadMem(32 bytes @ 0xE0001FE0) T0D54 010:921.299 [0][1]: E0001000 CID B105E00D PID 003BB002 DWT T0D54 010:921.428 CPU_ReadMem(32 bytes @ 0xE0002FE0) T0D54 010:923.301 [0][2]: E0002000 CID B105E00D PID 002BB003 FPB T0D54 010:923.430 CPU_ReadMem(32 bytes @ 0xE0000FE0) T0D54 010:925.299 [0][3]: E0000000 CID B105E00D PID 003BB001 ITM T0D54 010:925.428 CPU_ReadMem(32 bytes @ 0xE0040FE0) T0D54 010:927.298 [0][4]: E0040000 CID B105900D PID 000BB9A1 TPIU T0D54 010:927.426 CPU_ReadMem(32 bytes @ 0xE0041FE0) T0D54 010:929.301 [0][5]: E0041000 CID B105900D PID 000BB925 ETM T0D54 010:930.283 - 168.403ms returns 0x2BA01477 T0D54 010:930.397 JLINK_GetDLLVersion() T0D54 010:930.447 - 0.075ms returns 76008 T0D54 010:930.504 JLINK_CORE_GetFound() T0D54 010:930.553 - 0.075ms returns 0xE0000FF T0D54 010:930.613 JLINK_GetDebugInfo(0x100 = JLINKARM_ROM_TABLE_ADDR_INDEX) T0D54 010:930.666 Value=0xE00FF000 T0D54 010:930.751 - 0.162ms returns 0 T0D54 010:930.852 JLINK_GetDebugInfo(0x100 = JLINKARM_ROM_TABLE_ADDR_INDEX) T0D54 010:930.900 Value=0xE00FF000 T0D54 010:930.968 - 0.137ms returns 0 T0D54 010:931.016 JLINK_GetDebugInfo(0x101 = JLINKARM_DEBUG_INFO_ETM_ADDR_INDEX) T0D54 010:931.060 Value=0xE0041000 T0D54 010:931.122 - 0.126ms returns 0 T0D54 010:931.170 JLINK_GetDebugInfo(0x102 = JLINKARM_DEBUG_INFO_MTB_ADDR_INDEX) T0D54 010:931.214 Value=0x00000000 T0D54 010:931.276 - 0.128ms returns 0 T0D54 010:931.325 JLINK_GetDebugInfo(0x103 = JLINKARM_DEBUG_INFO_TPIU_ADDR_INDEX) T0D54 010:931.369 Value=0xE0040000 T0D54 010:931.431 - 0.127ms returns 0 T0D54 010:931.480 JLINK_GetDebugInfo(0x104 = JLINKARM_DEBUG_INFO_ITM_ADDR_INDEX) T0D54 010:931.524 Value=0xE0000000 T0D54 010:931.586 - 0.127ms returns 0 T0D54 010:931.638 JLINK_GetDebugInfo(0x105 = JLINKARM_DEBUG_INFO_DWT_ADDR_INDEX) T0D54 010:931.682 Value=0xE0001000 T0D54 010:931.746 - 0.129ms returns 0 T0D54 010:931.795 JLINK_GetDebugInfo(0x106 = JLINKARM_DEBUG_INFO_FPB_ADDR_INDEX) T0D54 010:931.838 Value=0xE0002000 T0D54 010:931.899 - 0.126ms returns 0 T0D54 010:931.947 JLINK_GetDebugInfo(0x107 = JLINKARM_DEBUG_INFO_NVIC_ADDR_INDEX) T0D54 010:931.991 Value=0xE000E000 T0D54 010:932.053 - 0.127ms returns 0 T0D54 010:932.101 JLINK_GetDebugInfo(0x10C = JLINKARM_DEBUG_INFO_DBG_ADDR_INDEX) T0D54 010:932.145 Value=0xE000EDF0 T0D54 010:932.207 - 0.126ms returns 0 T0D54 010:932.267 JLINK_ReadMemU32(0xE000EF40, 0x1 Items) T0D54 010:932.349 CPU_ReadMem(4 bytes @ 0xE000EF40) T0D54 010:933.724 Data: 21 00 11 10 T0D54 010:933.839 - 1.594ms returns 1 (0x1) T0D54 010:933.898 JLINK_ReadMemU32(0xE000EF44, 0x1 Items) T0D54 010:933.962 CPU_ReadMem(4 bytes @ 0xE000EF44) T0D54 010:934.688 Data: 11 00 00 11 T0D54 010:934.805 - 0.930ms returns 1 (0x1) T0D54 010:934.865 JLINK_ReadMemU32(0xE000ED00, 0x1 Items) T0D54 010:934.929 CPU_ReadMem(4 bytes @ 0xE000ED00) T0D54 010:935.704 Data: 41 C2 0F 41 T0D54 010:935.816 Debug reg: CPUID T0D54 010:935.881 - 1.038ms returns 1 (0x1) T0D54 010:935.941 JLINK_HasError() T0D54 010:935.995 JLINK_SetResetType(JLINKARM_CM3_RESET_TYPE_NORMAL) T0D54 010:936.039 - 0.066ms returns JLINKARM_CM3_RESET_TYPE_NORMAL T0D54 010:936.124 JLINK_Reset() T0D54 010:936.206 CPU is running T0D54 010:936.284 CPU_WriteMem(4 bytes @ 0xE000EDF0) T0D54 010:937.678 CPU is running T0D54 010:937.805 CPU_WriteMem(4 bytes @ 0xE000EDFC) T0D54 010:938.7