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| 1 | /** |
1 | /** |
| 2 | ****************************************************************************** |
2 | ****************************************************************************** |
| 3 | * @file stm32l1xx_ll_usart.c |
3 | * @file stm32l1xx_ll_usart.c |
| 4 | * @author MCD Application Team |
4 | * @author MCD Application Team |
| 5 | * @brief USART LL module driver. |
5 | * @brief USART LL module driver. |
| 6 | ****************************************************************************** |
6 | ****************************************************************************** |
| 7 | * @attention |
7 | * @attention |
| 8 | * |
8 | * |
| 9 | * <h2><center>© Copyright (c) 2016 STMicroelectronics. |
9 | * Copyright (c) 2016 STMicroelectronics. |
| 10 | * All rights reserved.</center></h2> |
10 | * All rights reserved. |
| 11 | * |
11 | * |
| 12 | * This software component is licensed by ST under BSD 3-Clause license, |
12 | * This software is licensed under terms that can be found in the LICENSE file |
| 13 | * the "License"; You may not use this file except in compliance with the |
13 | * in the root directory of this software component. |
| 14 | * License. You may obtain a copy of the License at: |
14 | * If no LICENSE file comes with this software, it is provided AS-IS. |
| 15 | * opensource.org/licenses/BSD-3-Clause |
15 | * |
| 16 | * |
16 | ****************************************************************************** |
| 17 | ****************************************************************************** |
17 | */ |
| 18 | */ |
18 | |
| 19 | 19 | #if defined(USE_FULL_LL_DRIVER) |
|
| 20 | #if defined(USE_FULL_LL_DRIVER) |
20 | |
| 21 | 21 | /* Includes ------------------------------------------------------------------*/ |
|
| 22 | /* Includes ------------------------------------------------------------------*/ |
22 | #include "stm32l1xx_ll_usart.h" |
| 23 | #include "stm32l1xx_ll_usart.h" |
23 | #include "stm32l1xx_ll_rcc.h" |
| 24 | #include "stm32l1xx_ll_rcc.h" |
24 | #include "stm32l1xx_ll_bus.h" |
| 25 | #include "stm32l1xx_ll_bus.h" |
25 | #ifdef USE_FULL_ASSERT |
| 26 | #ifdef USE_FULL_ASSERT |
26 | #include "stm32_assert.h" |
| 27 | #include "stm32_assert.h" |
27 | #else |
| 28 | #else |
28 | #define assert_param(expr) ((void)0U) |
| 29 | #define assert_param(expr) ((void)0U) |
29 | #endif |
| 30 | #endif |
30 | |
| 31 | 31 | /** @addtogroup STM32L1xx_LL_Driver |
|
| 32 | /** @addtogroup STM32L1xx_LL_Driver |
32 | * @{ |
| 33 | * @{ |
33 | */ |
| 34 | */ |
34 | |
| 35 | 35 | #if defined (USART1) || defined (USART2) || defined (USART3) || defined (UART4) || defined (UART5) |
|
| 36 | #if defined (USART1) || defined (USART2) || defined (USART3) || defined (UART4) || defined (UART5) |
36 | |
| 37 | 37 | /** @addtogroup USART_LL |
|
| 38 | /** @addtogroup USART_LL |
38 | * @{ |
| 39 | * @{ |
39 | */ |
| 40 | */ |
40 | |
| 41 | 41 | /* Private types -------------------------------------------------------------*/ |
|
| 42 | /* Private types -------------------------------------------------------------*/ |
42 | /* Private variables ---------------------------------------------------------*/ |
| 43 | /* Private variables ---------------------------------------------------------*/ |
43 | /* Private constants ---------------------------------------------------------*/ |
| 44 | /* Private constants ---------------------------------------------------------*/ |
44 | /** @addtogroup USART_LL_Private_Constants |
| 45 | /** @addtogroup USART_LL_Private_Constants |
45 | * @{ |
| 46 | * @{ |
46 | */ |
| 47 | */ |
47 | |
| 48 | 48 | /** |
|
| 49 | /** |
49 | * @} |
| 50 | * @} |
50 | */ |
| 51 | */ |
51 | |
| 52 | 52 | ||
| 53 | 53 | /* Private macros ------------------------------------------------------------*/ |
|
| 54 | /* Private macros ------------------------------------------------------------*/ |
54 | /** @addtogroup USART_LL_Private_Macros |
| 55 | /** @addtogroup USART_LL_Private_Macros |
55 | * @{ |
| 56 | * @{ |
56 | */ |
| 57 | */ |
57 | |
| 58 | 58 | /* __BAUDRATE__ The maximum Baud Rate is derived from the maximum clock available |
|
| 59 | /* __BAUDRATE__ The maximum Baud Rate is derived from the maximum clock available |
59 | * divided by the smallest oversampling used on the USART (i.e. 8) */ |
| 60 | * divided by the smallest oversampling used on the USART (i.e. 8) */ |
60 | #define IS_LL_USART_BAUDRATE(__BAUDRATE__) ((__BAUDRATE__) <= 4000000U) |
| 61 | #define IS_LL_USART_BAUDRATE(__BAUDRATE__) ((__BAUDRATE__) <= 4000000U) |
61 | |
| 62 | 62 | /* __VALUE__ In case of oversampling by 16 and 8, BRR content must be greater than or equal to 16d. */ |
|
| 63 | /* __VALUE__ In case of oversampling by 16 and 8, BRR content must be greater than or equal to 16d. */ |
63 | #define IS_LL_USART_BRR_MIN(__VALUE__) ((__VALUE__) >= 16U) |
| 64 | #define IS_LL_USART_BRR_MIN(__VALUE__) ((__VALUE__) >= 16U) |
64 | |
| 65 | 65 | #define IS_LL_USART_DIRECTION(__VALUE__) (((__VALUE__) == LL_USART_DIRECTION_NONE) \ |
|
| 66 | #define IS_LL_USART_DIRECTION(__VALUE__) (((__VALUE__) == LL_USART_DIRECTION_NONE) \ |
66 | || ((__VALUE__) == LL_USART_DIRECTION_RX) \ |
| 67 | || ((__VALUE__) == LL_USART_DIRECTION_RX) \ |
67 | || ((__VALUE__) == LL_USART_DIRECTION_TX) \ |
| 68 | || ((__VALUE__) == LL_USART_DIRECTION_TX) \ |
68 | || ((__VALUE__) == LL_USART_DIRECTION_TX_RX)) |
| 69 | || ((__VALUE__) == LL_USART_DIRECTION_TX_RX)) |
69 | |
| 70 | 70 | #define IS_LL_USART_PARITY(__VALUE__) (((__VALUE__) == LL_USART_PARITY_NONE) \ |
|
| 71 | #define IS_LL_USART_PARITY(__VALUE__) (((__VALUE__) == LL_USART_PARITY_NONE) \ |
71 | || ((__VALUE__) == LL_USART_PARITY_EVEN) \ |
| 72 | || ((__VALUE__) == LL_USART_PARITY_EVEN) \ |
72 | || ((__VALUE__) == LL_USART_PARITY_ODD)) |
| 73 | || ((__VALUE__) == LL_USART_PARITY_ODD)) |
73 | |
| 74 | 74 | #define IS_LL_USART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_USART_DATAWIDTH_8B) \ |
|
| 75 | #define IS_LL_USART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_USART_DATAWIDTH_8B) \ |
75 | || ((__VALUE__) == LL_USART_DATAWIDTH_9B)) |
| 76 | || ((__VALUE__) == LL_USART_DATAWIDTH_9B)) |
76 | |
| 77 | 77 | #define IS_LL_USART_OVERSAMPLING(__VALUE__) (((__VALUE__) == LL_USART_OVERSAMPLING_16) \ |
|
| 78 | #define IS_LL_USART_OVERSAMPLING(__VALUE__) (((__VALUE__) == LL_USART_OVERSAMPLING_16) \ |
78 | || ((__VALUE__) == LL_USART_OVERSAMPLING_8)) |
| 79 | || ((__VALUE__) == LL_USART_OVERSAMPLING_8)) |
79 | |
| 80 | 80 | #define IS_LL_USART_LASTBITCLKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_LASTCLKPULSE_NO_OUTPUT) \ |
|
| 81 | #define IS_LL_USART_LASTBITCLKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_LASTCLKPULSE_NO_OUTPUT) \ |
81 | || ((__VALUE__) == LL_USART_LASTCLKPULSE_OUTPUT)) |
| 82 | || ((__VALUE__) == LL_USART_LASTCLKPULSE_OUTPUT)) |
82 | |
| 83 | 83 | #define IS_LL_USART_CLOCKPHASE(__VALUE__) (((__VALUE__) == LL_USART_PHASE_1EDGE) \ |
|
| 84 | #define IS_LL_USART_CLOCKPHASE(__VALUE__) (((__VALUE__) == LL_USART_PHASE_1EDGE) \ |
84 | || ((__VALUE__) == LL_USART_PHASE_2EDGE)) |
| 85 | || ((__VALUE__) == LL_USART_PHASE_2EDGE)) |
85 | |
| 86 | 86 | #define IS_LL_USART_CLOCKPOLARITY(__VALUE__) (((__VALUE__) == LL_USART_POLARITY_LOW) \ |
|
| 87 | #define IS_LL_USART_CLOCKPOLARITY(__VALUE__) (((__VALUE__) == LL_USART_POLARITY_LOW) \ |
87 | || ((__VALUE__) == LL_USART_POLARITY_HIGH)) |
| 88 | || ((__VALUE__) == LL_USART_POLARITY_HIGH)) |
88 | |
| 89 | 89 | #define IS_LL_USART_CLOCKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_CLOCK_DISABLE) \ |
|
| 90 | #define IS_LL_USART_CLOCKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_CLOCK_DISABLE) \ |
90 | || ((__VALUE__) == LL_USART_CLOCK_ENABLE)) |
| 91 | || ((__VALUE__) == LL_USART_CLOCK_ENABLE)) |
91 | |
| 92 | 92 | #define IS_LL_USART_STOPBITS(__VALUE__) (((__VALUE__) == LL_USART_STOPBITS_0_5) \ |
|
| 93 | #define IS_LL_USART_STOPBITS(__VALUE__) (((__VALUE__) == LL_USART_STOPBITS_0_5) \ |
93 | || ((__VALUE__) == LL_USART_STOPBITS_1) \ |
| 94 | || ((__VALUE__) == LL_USART_STOPBITS_1) \ |
94 | || ((__VALUE__) == LL_USART_STOPBITS_1_5) \ |
| 95 | || ((__VALUE__) == LL_USART_STOPBITS_1_5) \ |
95 | || ((__VALUE__) == LL_USART_STOPBITS_2)) |
| 96 | || ((__VALUE__) == LL_USART_STOPBITS_2)) |
96 | |
| 97 | 97 | #define IS_LL_USART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_USART_HWCONTROL_NONE) \ |
|
| 98 | #define IS_LL_USART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_USART_HWCONTROL_NONE) \ |
98 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS) \ |
| 99 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS) \ |
99 | || ((__VALUE__) == LL_USART_HWCONTROL_CTS) \ |
| 100 | || ((__VALUE__) == LL_USART_HWCONTROL_CTS) \ |
100 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS_CTS)) |
| 101 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS_CTS)) |
101 | |
| 102 | 102 | /** |
|
| 103 | /** |
103 | * @} |
| 104 | * @} |
104 | */ |
| 105 | */ |
105 | |
| 106 | 106 | /* Private function prototypes -----------------------------------------------*/ |
|
| 107 | /* Private function prototypes -----------------------------------------------*/ |
107 | |
| 108 | 108 | /* Exported functions --------------------------------------------------------*/ |
|
| 109 | /* Exported functions --------------------------------------------------------*/ |
109 | /** @addtogroup USART_LL_Exported_Functions |
| 110 | /** @addtogroup USART_LL_Exported_Functions |
110 | * @{ |
| 111 | * @{ |
111 | */ |
| 112 | */ |
112 | |
| 113 | 113 | /** @addtogroup USART_LL_EF_Init |
|
| 114 | /** @addtogroup USART_LL_EF_Init |
114 | * @{ |
| 115 | * @{ |
115 | */ |
| 116 | */ |
116 | |
| 117 | 117 | /** |
|
| 118 | /** |
118 | * @brief De-initialize USART registers (Registers restored to their default values). |
| 119 | * @brief De-initialize USART registers (Registers restored to their default values). |
119 | * @param USARTx USART Instance |
| 120 | * @param USARTx USART Instance |
120 | * @retval An ErrorStatus enumeration value: |
| 121 | * @retval An ErrorStatus enumeration value: |
121 | * - SUCCESS: USART registers are de-initialized |
| 122 | * - SUCCESS: USART registers are de-initialized |
122 | * - ERROR: USART registers are not de-initialized |
| 123 | * - ERROR: USART registers are not de-initialized |
123 | */ |
| 124 | */ |
124 | ErrorStatus LL_USART_DeInit(const USART_TypeDef *USARTx) |
| 125 | ErrorStatus LL_USART_DeInit(USART_TypeDef *USARTx) |
125 | { |
| 126 | { |
126 | ErrorStatus status = SUCCESS; |
| 127 | ErrorStatus status = SUCCESS; |
127 | |
| 128 | 128 | /* Check the parameters */ |
|
| 129 | /* Check the parameters */ |
129 | assert_param(IS_UART_INSTANCE(USARTx)); |
| 130 | assert_param(IS_UART_INSTANCE(USARTx)); |
130 | |
| 131 | 131 | if (USARTx == USART1) |
|
| 132 | if (USARTx == USART1) |
132 | { |
| 133 | { |
133 | /* Force reset of USART clock */ |
| 134 | /* Force reset of USART clock */ |
134 | LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART1); |
| 135 | LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART1); |
135 | |
| 136 | 136 | /* Release reset of USART clock */ |
|
| 137 | /* Release reset of USART clock */ |
137 | LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART1); |
| 138 | LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART1); |
138 | } |
| 139 | } |
139 | else if (USARTx == USART2) |
| 140 | else if (USARTx == USART2) |
140 | { |
| 141 | { |
141 | /* Force reset of USART clock */ |
| 142 | /* Force reset of USART clock */ |
142 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART2); |
| 143 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART2); |
143 | |
| 144 | 144 | /* Release reset of USART clock */ |
|
| 145 | /* Release reset of USART clock */ |
145 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART2); |
| 146 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART2); |
146 | } |
| 147 | } |
147 | else if (USARTx == USART3) |
| 148 | else if (USARTx == USART3) |
148 | { |
| 149 | { |
149 | /* Force reset of USART clock */ |
| 150 | /* Force reset of USART clock */ |
150 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART3); |
| 151 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART3); |
151 | |
| 152 | 152 | /* Release reset of USART clock */ |
|
| 153 | /* Release reset of USART clock */ |
153 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART3); |
| 154 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART3); |
154 | } |
| 155 | } |
155 | #if defined(UART4) |
| 156 | #if defined(UART4) |
156 | else if (USARTx == UART4) |
| 157 | else if (USARTx == UART4) |
157 | { |
| 158 | { |
158 | /* Force reset of UART clock */ |
| 159 | /* Force reset of UART clock */ |
159 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART4); |
| 160 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART4); |
160 | |
| 161 | 161 | /* Release reset of UART clock */ |
|
| 162 | /* Release reset of UART clock */ |
162 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART4); |
| 163 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART4); |
163 | } |
| 164 | } |
164 | #endif /* UART4 */ |
| 165 | #endif /* UART4 */ |
165 | #if defined(UART5) |
| 166 | #if defined(UART5) |
166 | else if (USARTx == UART5) |
| 167 | else if (USARTx == UART5) |
167 | { |
| 168 | { |
168 | /* Force reset of UART clock */ |
| 169 | /* Force reset of UART clock */ |
169 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART5); |
| 170 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART5); |
170 | |
| 171 | 171 | /* Release reset of UART clock */ |
|
| 172 | /* Release reset of UART clock */ |
172 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART5); |
| 173 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART5); |
173 | } |
| 174 | } |
174 | #endif /* UART5 */ |
| 175 | #endif /* UART5 */ |
175 | else |
| 176 | else |
176 | { |
| 177 | { |
177 | status = ERROR; |
| 178 | status = ERROR; |
178 | } |
| 179 | } |
179 | |
| 180 | 180 | return (status); |
|
| 181 | return (status); |
181 | } |
| 182 | } |
182 | |
| 183 | 183 | /** |
|
| 184 | /** |
184 | * @brief Initialize USART registers according to the specified |
| 185 | * @brief Initialize USART registers according to the specified |
185 | * parameters in USART_InitStruct. |
| 186 | * parameters in USART_InitStruct. |
186 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| 187 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
187 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| 188 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
188 | * @note Baud rate value stored in USART_InitStruct BaudRate field, should be valid (different from 0). |
| 189 | * @note Baud rate value stored in USART_InitStruct BaudRate field, should be valid (different from 0). |
189 | * @param USARTx USART Instance |
| 190 | * @param USARTx USART Instance |
190 | * @param USART_InitStruct pointer to a LL_USART_InitTypeDef structure |
| 191 | * @param USART_InitStruct pointer to a LL_USART_InitTypeDef structure |
191 | * that contains the configuration information for the specified USART peripheral. |
| 192 | * that contains the configuration information for the specified USART peripheral. |
192 | * @retval An ErrorStatus enumeration value: |
| 193 | * @retval An ErrorStatus enumeration value: |
193 | * - SUCCESS: USART registers are initialized according to USART_InitStruct content |
| 194 | * - SUCCESS: USART registers are initialized according to USART_InitStruct content |
194 | * - ERROR: Problem occurred during USART Registers initialization |
| 195 | * - ERROR: Problem occurred during USART Registers initialization |
195 | */ |
| 196 | */ |
196 | ErrorStatus LL_USART_Init(USART_TypeDef *USARTx, const LL_USART_InitTypeDef *USART_InitStruct) |
| 197 | ErrorStatus LL_USART_Init(USART_TypeDef *USARTx, LL_USART_InitTypeDef *USART_InitStruct) |
197 | { |
| 198 | { |
198 | ErrorStatus status = ERROR; |
| 199 | ErrorStatus status = ERROR; |
199 | uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO; |
| 200 | uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO; |
200 | LL_RCC_ClocksTypeDef rcc_clocks; |
| 201 | LL_RCC_ClocksTypeDef rcc_clocks; |
201 | |
| 202 | 202 | /* Check the parameters */ |
|
| 203 | /* Check the parameters */ |
203 | assert_param(IS_UART_INSTANCE(USARTx)); |
| 204 | assert_param(IS_UART_INSTANCE(USARTx)); |
204 | assert_param(IS_LL_USART_BAUDRATE(USART_InitStruct->BaudRate)); |
| 205 | assert_param(IS_LL_USART_BAUDRATE(USART_InitStruct->BaudRate)); |
205 | assert_param(IS_LL_USART_DATAWIDTH(USART_InitStruct->DataWidth)); |
| 206 | assert_param(IS_LL_USART_DATAWIDTH(USART_InitStruct->DataWidth)); |
206 | assert_param(IS_LL_USART_STOPBITS(USART_InitStruct->StopBits)); |
| 207 | assert_param(IS_LL_USART_STOPBITS(USART_InitStruct->StopBits)); |
207 | assert_param(IS_LL_USART_PARITY(USART_InitStruct->Parity)); |
| 208 | assert_param(IS_LL_USART_PARITY(USART_InitStruct->Parity)); |
208 | assert_param(IS_LL_USART_DIRECTION(USART_InitStruct->TransferDirection)); |
| 209 | assert_param(IS_LL_USART_DIRECTION(USART_InitStruct->TransferDirection)); |
209 | assert_param(IS_LL_USART_HWCONTROL(USART_InitStruct->HardwareFlowControl)); |
| 210 | assert_param(IS_LL_USART_HWCONTROL(USART_InitStruct->HardwareFlowControl)); |
210 | assert_param(IS_LL_USART_OVERSAMPLING(USART_InitStruct->OverSampling)); |
| 211 | assert_param(IS_LL_USART_OVERSAMPLING(USART_InitStruct->OverSampling)); |
211 | |
| 212 | 212 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
|
| 213 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
213 | CRx registers */ |
| 214 | CRx registers */ |
214 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| 215 | if (LL_USART_IsEnabled(USARTx) == 0U) |
215 | { |
| 216 | { |
216 | /*---------------------------- USART CR1 Configuration ----------------------- |
| 217 | /*---------------------------- USART CR1 Configuration ----------------------- |
217 | * Configure USARTx CR1 (USART Word Length, Parity, Mode and Oversampling bits) with parameters: |
| 218 | * Configure USARTx CR1 (USART Word Length, Parity, Mode and Oversampling bits) with parameters: |
218 | * - DataWidth: USART_CR1_M bits according to USART_InitStruct->DataWidth value |
| 219 | * - DataWidth: USART_CR1_M bits according to USART_InitStruct->DataWidth value |
219 | * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to USART_InitStruct->Parity value |
| 220 | * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to USART_InitStruct->Parity value |
220 | * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to USART_InitStruct->TransferDirection value |
| 221 | * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to USART_InitStruct->TransferDirection value |
221 | * - Oversampling: USART_CR1_OVER8 bit according to USART_InitStruct->OverSampling value. |
| 222 | * - Oversampling: USART_CR1_OVER8 bit according to USART_InitStruct->OverSampling value. |
222 | */ |
| 223 | */ |
223 | MODIFY_REG(USARTx->CR1, |
| 224 | MODIFY_REG(USARTx->CR1, |
224 | (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | |
| 225 | (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | |
225 | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8), |
| 226 | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8), |
226 | (USART_InitStruct->DataWidth | USART_InitStruct->Parity | |
| 227 | (USART_InitStruct->DataWidth | USART_InitStruct->Parity | |
227 | USART_InitStruct->TransferDirection | USART_InitStruct->OverSampling)); |
| 228 | USART_InitStruct->TransferDirection | USART_InitStruct->OverSampling)); |
228 | |
| 229 | 229 | /*---------------------------- USART CR2 Configuration ----------------------- |
|
| 230 | /*---------------------------- USART CR2 Configuration ----------------------- |
230 | * Configure USARTx CR2 (Stop bits) with parameters: |
| 231 | * Configure USARTx CR2 (Stop bits) with parameters: |
231 | * - Stop Bits: USART_CR2_STOP bits according to USART_InitStruct->StopBits value. |
| 232 | * - Stop Bits: USART_CR2_STOP bits according to USART_InitStruct->StopBits value. |
232 | * - CLKEN, CPOL, CPHA and LBCL bits are to be configured using LL_USART_ClockInit(). |
| 233 | * - CLKEN, CPOL, CPHA and LBCL bits are to be configured using LL_USART_ClockInit(). |
233 | */ |
| 234 | */ |
234 | LL_USART_SetStopBitsLength(USARTx, USART_InitStruct->StopBits); |
| 235 | LL_USART_SetStopBitsLength(USARTx, USART_InitStruct->StopBits); |
235 | |
| 236 | 236 | /*---------------------------- USART CR3 Configuration ----------------------- |
|
| 237 | /*---------------------------- USART CR3 Configuration ----------------------- |
237 | * Configure USARTx CR3 (Hardware Flow Control) with parameters: |
| 238 | * Configure USARTx CR3 (Hardware Flow Control) with parameters: |
238 | * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to USART_InitStruct->HardwareFlowControl value. |
| 239 | * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to USART_InitStruct->HardwareFlowControl value. |
239 | */ |
| 240 | */ |
240 | LL_USART_SetHWFlowCtrl(USARTx, USART_InitStruct->HardwareFlowControl); |
| 241 | LL_USART_SetHWFlowCtrl(USARTx, USART_InitStruct->HardwareFlowControl); |
241 | |
| 242 | 242 | /*---------------------------- USART BRR Configuration ----------------------- |
|
| 243 | /*---------------------------- USART BRR Configuration ----------------------- |
243 | * Retrieve Clock frequency used for USART Peripheral |
| 244 | * Retrieve Clock frequency used for USART Peripheral |
244 | */ |
| 245 | */ |
245 | LL_RCC_GetSystemClocksFreq(&rcc_clocks); |
| 246 | LL_RCC_GetSystemClocksFreq(&rcc_clocks); |
246 | if (USARTx == USART1) |
| 247 | if (USARTx == USART1) |
247 | { |
| 248 | { |
248 | periphclk = rcc_clocks.PCLK2_Frequency; |
| 249 | periphclk = rcc_clocks.PCLK2_Frequency; |
249 | } |
| 250 | } |
250 | else if (USARTx == USART2) |
| 251 | else if (USARTx == USART2) |
251 | { |
| 252 | { |
252 | periphclk = rcc_clocks.PCLK1_Frequency; |
| 253 | periphclk = rcc_clocks.PCLK1_Frequency; |
253 | } |
| 254 | } |
254 | else if (USARTx == USART3) |
| 255 | else if (USARTx == USART3) |
255 | { |
| 256 | { |
256 | periphclk = rcc_clocks.PCLK1_Frequency; |
| 257 | periphclk = rcc_clocks.PCLK1_Frequency; |
257 | } |
| 258 | } |
258 | #if defined(UART4) |
| 259 | #if defined(UART4) |
259 | else if (USARTx == UART4) |
| 260 | else if (USARTx == UART4) |
260 | { |
| 261 | { |
261 | periphclk = rcc_clocks.PCLK1_Frequency; |
| 262 | periphclk = rcc_clocks.PCLK1_Frequency; |
262 | } |
| 263 | } |
263 | #endif /* UART4 */ |
| 264 | #endif /* UART4 */ |
264 | #if defined(UART5) |
| 265 | #if defined(UART5) |
265 | else if (USARTx == UART5) |
| 266 | else if (USARTx == UART5) |
266 | { |
| 267 | { |
267 | periphclk = rcc_clocks.PCLK1_Frequency; |
| 268 | periphclk = rcc_clocks.PCLK1_Frequency; |
268 | } |
| 269 | } |
269 | #endif /* UART5 */ |
| 270 | #endif /* UART5 */ |
270 | else |
| 271 | else |
271 | { |
| 272 | { |
272 | /* Nothing to do, as error code is already assigned to ERROR value */ |
| 273 | /* Nothing to do, as error code is already assigned to ERROR value */ |
273 | } |
| 274 | } |
274 | |
| 275 | 275 | /* Configure the USART Baud Rate : |
|
| 276 | /* Configure the USART Baud Rate : |
276 | - valid baud rate value (different from 0) is required |
| 277 | - valid baud rate value (different from 0) is required |
277 | - Peripheral clock as returned by RCC service, should be valid (different from 0). |
| 278 | - Peripheral clock as returned by RCC service, should be valid (different from 0). |
278 | */ |
| 279 | */ |
279 | if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO) |
| 280 | if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO) |
280 | && (USART_InitStruct->BaudRate != 0U)) |
| 281 | && (USART_InitStruct->BaudRate != 0U)) |
281 | { |
| 282 | { |
282 | status = SUCCESS; |
| 283 | status = SUCCESS; |
283 | LL_USART_SetBaudRate(USARTx, |
| 284 | LL_USART_SetBaudRate(USARTx, |
284 | periphclk, |
| 285 | periphclk, |
285 | USART_InitStruct->OverSampling, |
| 286 | USART_InitStruct->OverSampling, |
286 | USART_InitStruct->BaudRate); |
| 287 | USART_InitStruct->BaudRate); |
287 | |
| 288 | 288 | /* Check BRR is greater than or equal to 16d */ |
|
| 289 | /* Check BRR is greater than or equal to 16d */ |
289 | assert_param(IS_LL_USART_BRR_MIN(USARTx->BRR)); |
| 290 | assert_param(IS_LL_USART_BRR_MIN(USARTx->BRR)); |
290 | } |
| 291 | } |
291 | } |
| 292 | } |
292 | /* Endif (=> USART not in Disabled state => return ERROR) */ |
| 293 | /* Endif (=> USART not in Disabled state => return ERROR) */ |
293 | |
| 294 | 294 | return (status); |
|
| 295 | return (status); |
295 | } |
| 296 | } |
296 | |
| 297 | 297 | /** |
|
| 298 | /** |
298 | * @brief Set each @ref LL_USART_InitTypeDef field to default value. |
| 299 | * @brief Set each @ref LL_USART_InitTypeDef field to default value. |
299 | * @param USART_InitStruct Pointer to a @ref LL_USART_InitTypeDef structure |
| 300 | * @param USART_InitStruct Pointer to a @ref LL_USART_InitTypeDef structure |
300 | * whose fields will be set to default values. |
| 301 | * whose fields will be set to default values. |
301 | * @retval None |
| 302 | * @retval None |
302 | */ |
| 303 | */ |
303 | |
| 304 | 304 | void LL_USART_StructInit(LL_USART_InitTypeDef *USART_InitStruct) |
|
| 305 | void LL_USART_StructInit(LL_USART_InitTypeDef *USART_InitStruct) |
305 | { |
| 306 | { |
306 | /* Set USART_InitStruct fields to default values */ |
| 307 | /* Set USART_InitStruct fields to default values */ |
307 | USART_InitStruct->BaudRate = 9600U; |
| 308 | USART_InitStruct->BaudRate = 9600U; |
308 | USART_InitStruct->DataWidth = LL_USART_DATAWIDTH_8B; |
| 309 | USART_InitStruct->DataWidth = LL_USART_DATAWIDTH_8B; |
309 | USART_InitStruct->StopBits = LL_USART_STOPBITS_1; |
| 310 | USART_InitStruct->StopBits = LL_USART_STOPBITS_1; |
310 | USART_InitStruct->Parity = LL_USART_PARITY_NONE ; |
| 311 | USART_InitStruct->Parity = LL_USART_PARITY_NONE ; |
311 | USART_InitStruct->TransferDirection = LL_USART_DIRECTION_TX_RX; |
| 312 | USART_InitStruct->TransferDirection = LL_USART_DIRECTION_TX_RX; |
312 | USART_InitStruct->HardwareFlowControl = LL_USART_HWCONTROL_NONE; |
| 313 | USART_InitStruct->HardwareFlowControl = LL_USART_HWCONTROL_NONE; |
313 | USART_InitStruct->OverSampling = LL_USART_OVERSAMPLING_16; |
| 314 | USART_InitStruct->OverSampling = LL_USART_OVERSAMPLING_16; |
314 | } |
| 315 | } |
315 | |
| 316 | 316 | /** |
|
| 317 | /** |
317 | * @brief Initialize USART Clock related settings according to the |
| 318 | * @brief Initialize USART Clock related settings according to the |
318 | * specified parameters in the USART_ClockInitStruct. |
| 319 | * specified parameters in the USART_ClockInitStruct. |
319 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| 320 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
320 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| 321 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
321 | * @param USARTx USART Instance |
| 322 | * @param USARTx USART Instance |
322 | * @param USART_ClockInitStruct Pointer to a @ref LL_USART_ClockInitTypeDef structure |
| 323 | * @param USART_ClockInitStruct Pointer to a @ref LL_USART_ClockInitTypeDef structure |
323 | * that contains the Clock configuration information for the specified USART peripheral. |
| 324 | * that contains the Clock configuration information for the specified USART peripheral. |
324 | * @retval An ErrorStatus enumeration value: |
| 325 | * @retval An ErrorStatus enumeration value: |
325 | * - SUCCESS: USART registers related to Clock settings are initialized according to USART_ClockInitStruct content |
| 326 | * - SUCCESS: USART registers related to Clock settings are initialized according to USART_ClockInitStruct content |
326 | * - ERROR: Problem occurred during USART Registers initialization |
| 327 | * - ERROR: Problem occurred during USART Registers initialization |
327 | */ |
| 328 | */ |
328 | ErrorStatus LL_USART_ClockInit(USART_TypeDef *USARTx, const LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| 329 | ErrorStatus LL_USART_ClockInit(USART_TypeDef *USARTx, LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
329 | { |
| 330 | { |
330 | ErrorStatus status = SUCCESS; |
| 331 | ErrorStatus status = SUCCESS; |
331 | |
| 332 | 332 | /* Check USART Instance and Clock signal output parameters */ |
|
| 333 | /* Check USART Instance and Clock signal output parameters */ |
333 | assert_param(IS_UART_INSTANCE(USARTx)); |
| 334 | assert_param(IS_UART_INSTANCE(USARTx)); |
334 | assert_param(IS_LL_USART_CLOCKOUTPUT(USART_ClockInitStruct->ClockOutput)); |
| 335 | assert_param(IS_LL_USART_CLOCKOUTPUT(USART_ClockInitStruct->ClockOutput)); |
335 | |
| 336 | 336 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
|
| 337 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
337 | CRx registers */ |
| 338 | CRx registers */ |
338 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| 339 | if (LL_USART_IsEnabled(USARTx) == 0U) |
339 | { |
| 340 | { |
340 | /*---------------------------- USART CR2 Configuration -----------------------*/ |
| 341 | /*---------------------------- USART CR2 Configuration -----------------------*/ |
341 | /* If Clock signal has to be output */ |
| 342 | /* If Clock signal has to be output */ |
342 | if (USART_ClockInitStruct->ClockOutput == LL_USART_CLOCK_DISABLE) |
| 343 | if (USART_ClockInitStruct->ClockOutput == LL_USART_CLOCK_DISABLE) |
343 | { |
| 344 | { |
344 | /* Deactivate Clock signal delivery : |
| 345 | /* Deactivate Clock signal delivery : |
345 | * - Disable Clock Output: USART_CR2_CLKEN cleared |
| 346 | * - Disable Clock Output: USART_CR2_CLKEN cleared |
346 | */ |
| 347 | */ |
347 | LL_USART_DisableSCLKOutput(USARTx); |
| 348 | LL_USART_DisableSCLKOutput(USARTx); |
348 | } |
| 349 | } |
349 | else |
| 350 | else |
350 | { |
| 351 | { |
351 | /* Ensure USART instance is USART capable */ |
| 352 | /* Ensure USART instance is USART capable */ |
352 | assert_param(IS_USART_INSTANCE(USARTx)); |
| 353 | assert_param(IS_USART_INSTANCE(USARTx)); |
353 | |
| 354 | 354 | /* Check clock related parameters */ |
|
| 355 | /* Check clock related parameters */ |
355 | assert_param(IS_LL_USART_CLOCKPOLARITY(USART_ClockInitStruct->ClockPolarity)); |
| 356 | assert_param(IS_LL_USART_CLOCKPOLARITY(USART_ClockInitStruct->ClockPolarity)); |
356 | assert_param(IS_LL_USART_CLOCKPHASE(USART_ClockInitStruct->ClockPhase)); |
| 357 | assert_param(IS_LL_USART_CLOCKPHASE(USART_ClockInitStruct->ClockPhase)); |
357 | assert_param(IS_LL_USART_LASTBITCLKOUTPUT(USART_ClockInitStruct->LastBitClockPulse)); |
| 358 | assert_param(IS_LL_USART_LASTBITCLKOUTPUT(USART_ClockInitStruct->LastBitClockPulse)); |
358 | |
| 359 | 359 | /*---------------------------- USART CR2 Configuration ----------------------- |
|
| 360 | /*---------------------------- USART CR2 Configuration ----------------------- |
360 | * Configure USARTx CR2 (Clock signal related bits) with parameters: |
| 361 | * Configure USARTx CR2 (Clock signal related bits) with parameters: |
361 | * - Enable Clock Output: USART_CR2_CLKEN set |
| 362 | * - Enable Clock Output: USART_CR2_CLKEN set |
362 | * - Clock Polarity: USART_CR2_CPOL bit according to USART_ClockInitStruct->ClockPolarity value |
| 363 | * - Clock Polarity: USART_CR2_CPOL bit according to USART_ClockInitStruct->ClockPolarity value |
363 | * - Clock Phase: USART_CR2_CPHA bit according to USART_ClockInitStruct->ClockPhase value |
| 364 | * - Clock Phase: USART_CR2_CPHA bit according to USART_ClockInitStruct->ClockPhase value |
364 | * - Last Bit Clock Pulse Output: USART_CR2_LBCL bit according to USART_ClockInitStruct->LastBitClockPulse value. |
| 365 | * - Last Bit Clock Pulse Output: USART_CR2_LBCL bit according to USART_ClockInitStruct->LastBitClockPulse value. |
365 | */ |
| 366 | */ |
366 | MODIFY_REG(USARTx->CR2, |
| 367 | MODIFY_REG(USARTx->CR2, |
367 | USART_CR2_CLKEN | USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_LBCL, |
| 368 | USART_CR2_CLKEN | USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_LBCL, |
368 | USART_CR2_CLKEN | USART_ClockInitStruct->ClockPolarity | |
| 369 | USART_CR2_CLKEN | USART_ClockInitStruct->ClockPolarity | |
369 | USART_ClockInitStruct->ClockPhase | USART_ClockInitStruct->LastBitClockPulse); |
| 370 | USART_ClockInitStruct->ClockPhase | USART_ClockInitStruct->LastBitClockPulse); |
370 | } |
| 371 | } |
371 | } |
| 372 | } |
372 | /* Else (USART not in Disabled state => return ERROR */ |
| 373 | /* Else (USART not in Disabled state => return ERROR */ |
373 | else |
| 374 | else |
374 | { |
| 375 | { |
375 | status = ERROR; |
| 376 | status = ERROR; |
376 | } |
| 377 | } |
377 | |
| 378 | 378 | return (status); |
|
| 379 | return (status); |
379 | } |
| 380 | } |
380 | |
| 381 | 381 | /** |
|
| 382 | /** |
382 | * @brief Set each field of a @ref LL_USART_ClockInitTypeDef type structure to default value. |
| 383 | * @brief Set each field of a @ref LL_USART_ClockInitTypeDef type structure to default value. |
383 | * @param USART_ClockInitStruct Pointer to a @ref LL_USART_ClockInitTypeDef structure |
| 384 | * @param USART_ClockInitStruct Pointer to a @ref LL_USART_ClockInitTypeDef structure |
384 | * whose fields will be set to default values. |
| 385 | * whose fields will be set to default values. |
385 | * @retval None |
| 386 | * @retval None |
386 | */ |
| 387 | */ |
387 | void LL_USART_ClockStructInit(LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| 388 | void LL_USART_ClockStructInit(LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
388 | { |
| 389 | { |
389 | /* Set LL_USART_ClockInitStruct fields with default values */ |
| 390 | /* Set LL_USART_ClockInitStruct fields with default values */ |
390 | USART_ClockInitStruct->ClockOutput = LL_USART_CLOCK_DISABLE; |
| 391 | USART_ClockInitStruct->ClockOutput = LL_USART_CLOCK_DISABLE; |
391 | USART_ClockInitStruct->ClockPolarity = LL_USART_POLARITY_LOW; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| 392 | USART_ClockInitStruct->ClockPolarity = LL_USART_POLARITY_LOW; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
392 | USART_ClockInitStruct->ClockPhase = LL_USART_PHASE_1EDGE; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| 393 | USART_ClockInitStruct->ClockPhase = LL_USART_PHASE_1EDGE; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
393 | USART_ClockInitStruct->LastBitClockPulse = LL_USART_LASTCLKPULSE_NO_OUTPUT; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| 394 | USART_ClockInitStruct->LastBitClockPulse = LL_USART_LASTCLKPULSE_NO_OUTPUT; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
394 | } |
| 395 | } |
395 | |
| 396 | 396 | /** |
|
| 397 | /** |
397 | * @} |
| 398 | * @} |
398 | */ |
| 399 | */ |
399 | |
| 400 | 400 | /** |
|
| 401 | /** |
401 | * @} |
| 402 | * @} |
402 | */ |
| 403 | */ |
403 | |
| 404 | 404 | /** |
|
| 405 | /** |
405 | * @} |
| 406 | * @} |
406 | */ |
| 407 | */ |
407 | |
| 408 | 408 | #endif /* USART1 || USART2|| USART3 || UART4 || UART5 */ |
|
| 409 | #endif /* USART1 || USART2|| USART3 || UART4 || UART5 */ |
409 | |
| 410 | 410 | /** |
|
| 411 | /** |
411 | * @} |
| 412 | * @} |
412 | */ |
| 413 | */ |
413 | |
| 414 | 414 | #endif /* USE_FULL_LL_DRIVER */ |
|
| 415 | #endif /* USE_FULL_LL_DRIVER */ |
415 | |
| 416 | 416 | ||
| 417 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
- | |
| 418 | - | ||