source: ctrl/firmware/Main/CubeMX/Core/Src/usart.c

Last change on this file was 64, checked in by Zed, 16 hours ago

USART3 TX DMA is working.
File size: 6.3 KB
Line 
1/* USER CODE BEGIN Header */
2/**
3  ******************************************************************************
4  * @file    usart.c
5  * @brief   This file provides code for the configuration
6  *          of the USART instances.
7  ******************************************************************************
8  * @attention
9  *
10  * Copyright (c) 2025 STMicroelectronics.
11  * All rights reserved.
12  *
13  * This software is licensed under terms that can be found in the LICENSE file
14  * in the root directory of this software component.
15  * If no LICENSE file comes with this software, it is provided AS-IS.
16  *
17  ******************************************************************************
18  */
19/* USER CODE END Header */
20/* Includes ------------------------------------------------------------------*/
21#include "usart.h"
22
23/* USER CODE BEGIN 0 */
24
25/* USER CODE END 0 */
26
27UART_HandleTypeDef huart3;
28DMA_HandleTypeDef hdma_usart3_rx;
29DMA_HandleTypeDef hdma_usart3_tx;
30
31/* USART3 init function */
32
33void MX_USART3_UART_Init(void)
34{
35
36  /* USER CODE BEGIN USART3_Init 0 */
37
38  /* USER CODE END USART3_Init 0 */
39
40  /* USER CODE BEGIN USART3_Init 1 */
41
42  /* USER CODE END USART3_Init 1 */
43  huart3.Instance = USART3;
44  huart3.Init.BaudRate = 115200;
45  huart3.Init.WordLength = UART_WORDLENGTH_8B;
46  huart3.Init.StopBits = UART_STOPBITS_1;
47  huart3.Init.Parity = UART_PARITY_NONE;
48  huart3.Init.Mode = UART_MODE_TX_RX;
49  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
50  huart3.Init.OverSampling = UART_OVERSAMPLING_16;
51  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
52  huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;
53  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_SWAP_INIT|UART_ADVFEATURE_DMADISABLEONERROR_INIT;
54  huart3.AdvancedInit.Swap = UART_ADVFEATURE_SWAP_ENABLE;
55  huart3.AdvancedInit.DMADisableonRxError = UART_ADVFEATURE_DMA_DISABLEONRXERROR;
56  if (HAL_UART_Init(&huart3) != HAL_OK)
57  {
58    Error_Handler();
59  }
60  if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
61  {
62    Error_Handler();
63  }
64  if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
65  {
66    Error_Handler();
67  }
68  if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK)
69  {
70    Error_Handler();
71  }
72  /* USER CODE BEGIN USART3_Init 2 */
73
74  /* USER CODE END USART3_Init 2 */
75
76}
77
78void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
79{
80
81  GPIO_InitTypeDef GPIO_InitStruct = {0};
82  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
83  if(uartHandle->Instance==USART3)
84  {
85  /* USER CODE BEGIN USART3_MspInit 0 */
86
87  /* USER CODE END USART3_MspInit 0 */
88
89  /** Initializes the peripherals clock
90  */
91    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART3;
92    PeriphClkInitStruct.PLL3.PLL3M = 25;
93    PeriphClkInitStruct.PLL3.PLL3N = 200;
94    PeriphClkInitStruct.PLL3.PLL3P = 2;
95    PeriphClkInitStruct.PLL3.PLL3Q = 8;
96    PeriphClkInitStruct.PLL3.PLL3R = 2;
97    PeriphClkInitStruct.PLL3.PLL3RGE = RCC_PLL3VCIRANGE_0;
98    PeriphClkInitStruct.PLL3.PLL3VCOSEL = RCC_PLL3VCOMEDIUM;
99    PeriphClkInitStruct.PLL3.PLL3FRACN = 0;
100    PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_PLL3;
101    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
102    {
103      Error_Handler();
104    }
105
106    /* USART3 clock enable */
107    __HAL_RCC_USART3_CLK_ENABLE();
108
109    __HAL_RCC_GPIOD_CLK_ENABLE();
110    /**USART3 GPIO Configuration
111    PD8     ------> USART3_TX
112    PD9     ------> USART3_RX
113    PD11     ------> USART3_CTS
114    PD12     ------> USART3_RTS
115    */
116    GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_11|GPIO_PIN_12;
117    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
118    GPIO_InitStruct.Pull = GPIO_NOPULL;
119    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
120    GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
121    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
122
123    /* USART3 DMA Init */
124    /* USART3_RX Init */
125    hdma_usart3_rx.Instance = DMA1_Stream1;
126    hdma_usart3_rx.Init.Request = DMA_REQUEST_USART3_RX;
127    hdma_usart3_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
128    hdma_usart3_rx.Init.PeriphInc = DMA_PINC_DISABLE;
129    hdma_usart3_rx.Init.MemInc = DMA_MINC_ENABLE;
130    hdma_usart3_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
131    hdma_usart3_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
132    hdma_usart3_rx.Init.Mode = DMA_CIRCULAR;
133    hdma_usart3_rx.Init.Priority = DMA_PRIORITY_LOW;
134    hdma_usart3_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
135    if (HAL_DMA_Init(&hdma_usart3_rx) != HAL_OK)
136    {
137      Error_Handler();
138    }
139
140    __HAL_LINKDMA(uartHandle,hdmarx,hdma_usart3_rx);
141
142    /* USART3_TX Init */
143    hdma_usart3_tx.Instance = DMA1_Stream2;
144    hdma_usart3_tx.Init.Request = DMA_REQUEST_USART3_TX;
145    hdma_usart3_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
146    hdma_usart3_tx.Init.PeriphInc = DMA_PINC_DISABLE;
147    hdma_usart3_tx.Init.MemInc = DMA_MINC_ENABLE;
148    hdma_usart3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
149    hdma_usart3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
150    hdma_usart3_tx.Init.Mode = DMA_NORMAL;
151    hdma_usart3_tx.Init.Priority = DMA_PRIORITY_HIGH;
152    hdma_usart3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
153    if (HAL_DMA_Init(&hdma_usart3_tx) != HAL_OK)
154    {
155      Error_Handler();
156    }
157
158    __HAL_LINKDMA(uartHandle,hdmatx,hdma_usart3_tx);
159
160    /* USART3 interrupt Init */
161    HAL_NVIC_SetPriority(USART3_IRQn, 0, 0);
162    HAL_NVIC_EnableIRQ(USART3_IRQn);
163  /* USER CODE BEGIN USART3_MspInit 1 */
164
165  /* USER CODE END USART3_MspInit 1 */
166  }
167}
168
169void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
170{
171
172  if(uartHandle->Instance==USART3)
173  {
174  /* USER CODE BEGIN USART3_MspDeInit 0 */
175
176  /* USER CODE END USART3_MspDeInit 0 */
177    /* Peripheral clock disable */
178    __HAL_RCC_USART3_CLK_DISABLE();
179
180    /**USART3 GPIO Configuration
181    PD8     ------> USART3_TX
182    PD9     ------> USART3_RX
183    PD11     ------> USART3_CTS
184    PD12     ------> USART3_RTS
185    */
186    HAL_GPIO_DeInit(GPIOD, GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_11|GPIO_PIN_12);
187
188    /* USART3 DMA DeInit */
189    HAL_DMA_DeInit(uartHandle->hdmarx);
190    HAL_DMA_DeInit(uartHandle->hdmatx);
191
192    /* USART3 interrupt Deinit */
193    HAL_NVIC_DisableIRQ(USART3_IRQn);
194  /* USER CODE BEGIN USART3_MspDeInit 1 */
195
196  /* USER CODE END USART3_MspDeInit 1 */
197  }
198}
199
200/* USER CODE BEGIN 1 */
201
202/* USER CODE END 1 */
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