今天在调试时,遇到个棘手的问题,分享解决方法给大家,$ I. s! A) U7 b 我使用HAL库,一个让人抓狂的烂库啊,想骂娘,一直骂都不解气的烂库。5 D+ _/ ]( C% m# z) W3 V 串口+DMA,官网407的DMA例程移植过来的,不需要过多说明,上代码即可 void HAL_UART_MspInit(UART_HandleTypeDef* huart) {' J: ?( a2 i1 I7 m GPIO_InitTypeDef GPIO_InitStruct;4 b! H% [; | ]' |" U3 } if(huart->Instance==USART3) {5 s# N: q/ G2 u1 ]2 j0 g# U6 K /* USER CODE BEGIN USART3_MspInit 0 */& \0 ~: ?! R' B9 A" ^9 M4 T - W1 s$ ^# n5 B2 v/ O7 v 4 x% f n$ r$ M: y1 m /* USER CODE END USART3_MspInit 0 */ /* Peripheral clock enable */9 a6 ^2 O: H% s9 b* x __HAL_RCC_USART3_CLK_ENABLE();9 q, q' x4 F& e4 ?# Q /**USART3 GPIO Configuration . M2 {1 G+ n" a: f0 h8 X PB10 ------> USART3_TX( i9 w5 r8 D( q8 b PB11 ------> USART3_RX */. }1 m/ W+ @# p0 Z GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;4 I) Y4 W; k7 ?$ n6 n$ D! Z$ j/ X GPIO_InitStruct.Pull = GPIO_PULLUP; ]$ x f1 z& Q) M' l0 u GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStruct.Alternate = GPIO_AF7_USART3; M* q6 z( n- ? HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);2 p; v# a$ |8 B# ]+ X : ?6 w7 S3 K. y6 g0 f& N, L 3 l5 R" |) ]! V& A9 N /*##-3- Configure the DMA streams ##########################################*/0 `4 |3 P. N2 G/ U* J6 \ /* Configure the DMA handler for Transmission process */ hdma_usart3_tx.Instance = USARTx_TX_DMA_STREAM; 7 Y8 s$ ]2 {0 b( }/ j( ~ hdma_usart3_tx.Init.Channel = USARTx_TX_DMA_CHANNEL; hdma_usart3_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_usart3_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_usart3_tx.Init.MemInc = DMA_MINC_ENABLE;) |2 l2 I7 z9 H7 o hdma_usart3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_usart3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;- a: j5 [# e- D4 l; |- r! j6 U2 H- F hdma_usart3_tx.Init.Mode = DMA_NORMAL;5 a* u: f* j/ h1 y, ?: z1 n5 ?5 a hdma_usart3_tx.Init.Priority = DMA_PRIORITY_LOW;+ l( y3 W+ [& Z: v$ K2 } hdma_usart3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; k5 Q+ Z$ `7 D3 T. Z+ [6 } hdma_usart3_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_usart3_tx.Init.MemBurst = DMA_MBURST_INC4;0 P" A; X& r6 B; H# a+ n" N# E hdma_usart3_tx.Init.PeriphBurst = DMA_PBURST_INC4;3 E; Z- T7 ~, [ HAL_DMA_Init(&hdma_usart3_tx); % H9 c2 K0 V5 ` /* Associate the initialized DMA handle to the UART handle */- [, y8 [$ u' E/ f9 S4 d+ H# o __HAL_LINKDMA(huart, hdmatx, hdma_usart3_tx); /* Associate the initialized DMA handle to the the UART handle */. o- i. u! {7 g' @% t+ s# K __HAL_LINKDMA(huart, hdmarx, hdma_usart3_rx); 2 y! p* \5 A4 o( g3 o /*##-4- Configure the NVIC for DMA #########################################*/ /* NVIC configuration for DMA transfer complete interrupt (USARTx_TX) */) q0 C" @' Z4 g4 K, N4 Q. P! g HAL_NVIC_SetPriority(DMA1_Stream3_IRQn, 0, 1); HAL_NVIC_EnableIRQ(DMA1_Stream3_IRQn); $ a$ c1 M8 q8 U: ], g7 a; S2 ` /* USER CODE BEGIN USART3_MspInit 1 */ HAL_NVIC_SetPriority(USART3_IRQn, 0, 0); HAL_NVIC_EnableIRQ(USART3_IRQn);' y: v" V- l1 z* ^ 5 t+ H% v; p% C6 n! u! P6 o; K /* USER CODE END USART3_MspInit 1 */ j9 ?5 m/ R1 \) b: [0 n } }1 K: v8 l0 ]: P5 n7 k$ t4 J /* USART3 init function */3 O! ?! H; t$ ~2 Y* Y( g; O static void MX_USART3_UART_Init(void)+ I' v) d( y: ?' |: U5 e {) n$ r& m& k/ o1 P4 t4 f huart3.Instance = USART3; huart3.Init.BaudRate = 115200*2;4 k/ g- S+ R1 t6 W( g6 d3 P huart3.Init.WordLength = UART_WORDLENGTH_8B; huart3.Init.StopBits = UART_STOPBITS_1; huart3.Init.Parity = UART_PARITY_NONE; huart3.Init.Mode = UART_MODE_TX_RX;5 F5 ^) B, A) N. p huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart3.Init.OverSampling = UART_OVERSAMPLING_16;6 |5 p* y1 R# K9 Z/ d) \" f4 D" k if (HAL_UART_Init(&huart3) != HAL_OK)9 ~+ a3 y- f! B( W6 ] { _Error_Handler(__FILE__, __LINE__); } " J! w, q7 @( S5 p }1 X' }) o2 b4 P! l' U. R % K( x6 ^. U. m 以上是初始化代码/ c8 c% |: f/ k0 \ 使用的DMA发送,中断接收,9 U# t4 X0 f3 I4 n5 e 串口是和4G模块通讯,具体哪个厂家的就不说了,只能说很low。 在配置模块时,出现了如图所示,9 F8 F; w' a! ` 再次上电没有错误了,就接上f4的串口,开始调试,顿时来个下马威啊,一直在反复进入串口中断,单步跟踪,先是 Framing error,后来一直是 Noise detected flag,Overrun error这2个错误,相当于进入死循环了,急得我直骂娘啊,百度一下,基本没有收获,能知道是硬件问题,就上了示波器,果然是波形出问题了,f4的串口是使用串口助手调试了N遍的,肯定没问题,只能把4G模块的波特率降低一个档次,因为之前使用115200(出厂默认值)一直没出问题,果然是没问题,又再次把波特率升到230400,直到在调试软件上没有任何错误,反复测试都OK,才放心大胆的使用,果然,一切正常了,权当发个水贴,给大家分享一下经验了。( {# z# x+ ?- R" X8 n3 D. j/ E % J |2 `8 m. ~4 S& {. t5 f& b |
谢谢分享啊 |
客气了 |
这个库各种出错,唉,不能提,怎么办,只有在错误中前行,收获也很大。 |
是啊,库里问题太多 |