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targets/TARGET_STM/TARGET_STM32F2/device/stm32f2xx_ll_usart.c@189:f392fc9709a3, 2019-02-20 (annotated)
- Committer:
- AnnaBridge
- Date:
- Wed Feb 20 22:31:08 2019 +0000
- Revision:
- 189:f392fc9709a3
- Parent:
- 167:e84263d55307
mbed library release version 165
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| AnnaBridge | 167:e84263d55307 | 1 | /** |
| AnnaBridge | 167:e84263d55307 | 2 | ****************************************************************************** |
| AnnaBridge | 167:e84263d55307 | 3 | * @file stm32f2xx_ll_usart.c |
| AnnaBridge | 167:e84263d55307 | 4 | * @author MCD Application Team |
| AnnaBridge | 167:e84263d55307 | 5 | * @version V1.2.1 |
| AnnaBridge | 167:e84263d55307 | 6 | * @date 14-April-2017 |
| AnnaBridge | 167:e84263d55307 | 7 | * @brief USART LL module driver. |
| AnnaBridge | 167:e84263d55307 | 8 | ****************************************************************************** |
| AnnaBridge | 167:e84263d55307 | 9 | * @attention |
| AnnaBridge | 167:e84263d55307 | 10 | * |
| AnnaBridge | 167:e84263d55307 | 11 | * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> |
| AnnaBridge | 167:e84263d55307 | 12 | * |
| AnnaBridge | 167:e84263d55307 | 13 | * Redistribution and use in source and binary forms, with or without modification, |
| AnnaBridge | 167:e84263d55307 | 14 | * are permitted provided that the following conditions are met: |
| AnnaBridge | 167:e84263d55307 | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
| AnnaBridge | 167:e84263d55307 | 16 | * this list of conditions and the following disclaimer. |
| AnnaBridge | 167:e84263d55307 | 17 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| AnnaBridge | 167:e84263d55307 | 18 | * this list of conditions and the following disclaimer in the documentation |
| AnnaBridge | 167:e84263d55307 | 19 | * and/or other materials provided with the distribution. |
| AnnaBridge | 167:e84263d55307 | 20 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| AnnaBridge | 167:e84263d55307 | 21 | * may be used to endorse or promote products derived from this software |
| AnnaBridge | 167:e84263d55307 | 22 | * without specific prior written permission. |
| AnnaBridge | 167:e84263d55307 | 23 | * |
| AnnaBridge | 167:e84263d55307 | 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AnnaBridge | 167:e84263d55307 | 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| AnnaBridge | 167:e84263d55307 | 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| AnnaBridge | 167:e84263d55307 | 27 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| AnnaBridge | 167:e84263d55307 | 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| AnnaBridge | 167:e84263d55307 | 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| AnnaBridge | 167:e84263d55307 | 30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| AnnaBridge | 167:e84263d55307 | 31 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| AnnaBridge | 167:e84263d55307 | 32 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| AnnaBridge | 167:e84263d55307 | 33 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| AnnaBridge | 167:e84263d55307 | 34 | * |
| AnnaBridge | 167:e84263d55307 | 35 | ****************************************************************************** |
| AnnaBridge | 167:e84263d55307 | 36 | */ |
| AnnaBridge | 167:e84263d55307 | 37 | #if defined(USE_FULL_LL_DRIVER) |
| AnnaBridge | 167:e84263d55307 | 38 | |
| AnnaBridge | 167:e84263d55307 | 39 | /* Includes ------------------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 40 | #include "stm32f2xx_ll_usart.h" |
| AnnaBridge | 167:e84263d55307 | 41 | #include "stm32f2xx_ll_rcc.h" |
| AnnaBridge | 167:e84263d55307 | 42 | #include "stm32f2xx_ll_bus.h" |
| AnnaBridge | 167:e84263d55307 | 43 | #ifdef USE_FULL_ASSERT |
| AnnaBridge | 167:e84263d55307 | 44 | #include "stm32_assert.h" |
| AnnaBridge | 167:e84263d55307 | 45 | #else |
| AnnaBridge | 167:e84263d55307 | 46 | #define assert_param(expr) ((void)0U) |
| AnnaBridge | 167:e84263d55307 | 47 | #endif |
| AnnaBridge | 167:e84263d55307 | 48 | |
| AnnaBridge | 167:e84263d55307 | 49 | /** @addtogroup STM32F2xx_LL_Driver |
| AnnaBridge | 167:e84263d55307 | 50 | * @{ |
| AnnaBridge | 167:e84263d55307 | 51 | */ |
| AnnaBridge | 167:e84263d55307 | 52 | |
| AnnaBridge | 167:e84263d55307 | 53 | #if defined (USART1) || defined (USART2) || defined (USART3) || defined (USART6) || defined (UART4) || defined (UART5) |
| AnnaBridge | 167:e84263d55307 | 54 | |
| AnnaBridge | 167:e84263d55307 | 55 | /** @addtogroup USART_LL |
| AnnaBridge | 167:e84263d55307 | 56 | * @{ |
| AnnaBridge | 167:e84263d55307 | 57 | */ |
| AnnaBridge | 167:e84263d55307 | 58 | |
| AnnaBridge | 167:e84263d55307 | 59 | /* Private types -------------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 60 | /* Private variables ---------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 61 | /* Private constants ---------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 62 | /** @addtogroup USART_LL_Private_Constants |
| AnnaBridge | 167:e84263d55307 | 63 | * @{ |
| AnnaBridge | 167:e84263d55307 | 64 | */ |
| AnnaBridge | 167:e84263d55307 | 65 | |
| AnnaBridge | 167:e84263d55307 | 66 | /** |
| AnnaBridge | 167:e84263d55307 | 67 | * @} |
| AnnaBridge | 167:e84263d55307 | 68 | */ |
| AnnaBridge | 167:e84263d55307 | 69 | |
| AnnaBridge | 167:e84263d55307 | 70 | |
| AnnaBridge | 167:e84263d55307 | 71 | /* Private macros ------------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 72 | /** @addtogroup USART_LL_Private_Macros |
| AnnaBridge | 167:e84263d55307 | 73 | * @{ |
| AnnaBridge | 167:e84263d55307 | 74 | */ |
| AnnaBridge | 167:e84263d55307 | 75 | |
| AnnaBridge | 167:e84263d55307 | 76 | /* __BAUDRATE__ The maximum Baud Rate is derived from the maximum clock available |
| AnnaBridge | 167:e84263d55307 | 77 | * divided by the smallest oversampling used on the USART (i.e. 8) */ |
| AnnaBridge | 167:e84263d55307 | 78 | #define IS_LL_USART_BAUDRATE(__BAUDRATE__) ((__BAUDRATE__) <= 10000000U) |
| AnnaBridge | 167:e84263d55307 | 79 | |
| AnnaBridge | 167:e84263d55307 | 80 | #define IS_LL_USART_DIRECTION(__VALUE__) (((__VALUE__) == LL_USART_DIRECTION_NONE) \ |
| AnnaBridge | 167:e84263d55307 | 81 | || ((__VALUE__) == LL_USART_DIRECTION_RX) \ |
| AnnaBridge | 167:e84263d55307 | 82 | || ((__VALUE__) == LL_USART_DIRECTION_TX) \ |
| AnnaBridge | 167:e84263d55307 | 83 | || ((__VALUE__) == LL_USART_DIRECTION_TX_RX)) |
| AnnaBridge | 167:e84263d55307 | 84 | |
| AnnaBridge | 167:e84263d55307 | 85 | #define IS_LL_USART_PARITY(__VALUE__) (((__VALUE__) == LL_USART_PARITY_NONE) \ |
| AnnaBridge | 167:e84263d55307 | 86 | || ((__VALUE__) == LL_USART_PARITY_EVEN) \ |
| AnnaBridge | 167:e84263d55307 | 87 | || ((__VALUE__) == LL_USART_PARITY_ODD)) |
| AnnaBridge | 167:e84263d55307 | 88 | |
| AnnaBridge | 167:e84263d55307 | 89 | #define IS_LL_USART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_USART_DATAWIDTH_8B) \ |
| AnnaBridge | 167:e84263d55307 | 90 | || ((__VALUE__) == LL_USART_DATAWIDTH_9B)) |
| AnnaBridge | 167:e84263d55307 | 91 | |
| AnnaBridge | 167:e84263d55307 | 92 | #define IS_LL_USART_OVERSAMPLING(__VALUE__) (((__VALUE__) == LL_USART_OVERSAMPLING_16) \ |
| AnnaBridge | 167:e84263d55307 | 93 | || ((__VALUE__) == LL_USART_OVERSAMPLING_8)) |
| AnnaBridge | 167:e84263d55307 | 94 | |
| AnnaBridge | 167:e84263d55307 | 95 | #define IS_LL_USART_LASTBITCLKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_LASTCLKPULSE_NO_OUTPUT) \ |
| AnnaBridge | 167:e84263d55307 | 96 | || ((__VALUE__) == LL_USART_LASTCLKPULSE_OUTPUT)) |
| AnnaBridge | 167:e84263d55307 | 97 | |
| AnnaBridge | 167:e84263d55307 | 98 | #define IS_LL_USART_CLOCKPHASE(__VALUE__) (((__VALUE__) == LL_USART_PHASE_1EDGE) \ |
| AnnaBridge | 167:e84263d55307 | 99 | || ((__VALUE__) == LL_USART_PHASE_2EDGE)) |
| AnnaBridge | 167:e84263d55307 | 100 | |
| AnnaBridge | 167:e84263d55307 | 101 | #define IS_LL_USART_CLOCKPOLARITY(__VALUE__) (((__VALUE__) == LL_USART_POLARITY_LOW) \ |
| AnnaBridge | 167:e84263d55307 | 102 | || ((__VALUE__) == LL_USART_POLARITY_HIGH)) |
| AnnaBridge | 167:e84263d55307 | 103 | |
| AnnaBridge | 167:e84263d55307 | 104 | #define IS_LL_USART_CLOCKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_CLOCK_DISABLE) \ |
| AnnaBridge | 167:e84263d55307 | 105 | || ((__VALUE__) == LL_USART_CLOCK_ENABLE)) |
| AnnaBridge | 167:e84263d55307 | 106 | |
| AnnaBridge | 167:e84263d55307 | 107 | #define IS_LL_USART_STOPBITS(__VALUE__) (((__VALUE__) == LL_USART_STOPBITS_0_5) \ |
| AnnaBridge | 167:e84263d55307 | 108 | || ((__VALUE__) == LL_USART_STOPBITS_1) \ |
| AnnaBridge | 167:e84263d55307 | 109 | || ((__VALUE__) == LL_USART_STOPBITS_1_5) \ |
| AnnaBridge | 167:e84263d55307 | 110 | || ((__VALUE__) == LL_USART_STOPBITS_2)) |
| AnnaBridge | 167:e84263d55307 | 111 | |
| AnnaBridge | 167:e84263d55307 | 112 | #define IS_LL_USART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_USART_HWCONTROL_NONE) \ |
| AnnaBridge | 167:e84263d55307 | 113 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS) \ |
| AnnaBridge | 167:e84263d55307 | 114 | || ((__VALUE__) == LL_USART_HWCONTROL_CTS) \ |
| AnnaBridge | 167:e84263d55307 | 115 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS_CTS)) |
| AnnaBridge | 167:e84263d55307 | 116 | |
| AnnaBridge | 167:e84263d55307 | 117 | /** |
| AnnaBridge | 167:e84263d55307 | 118 | * @} |
| AnnaBridge | 167:e84263d55307 | 119 | */ |
| AnnaBridge | 167:e84263d55307 | 120 | |
| AnnaBridge | 167:e84263d55307 | 121 | /* Private function prototypes -----------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 122 | |
| AnnaBridge | 167:e84263d55307 | 123 | /* Exported functions --------------------------------------------------------*/ |
| AnnaBridge | 167:e84263d55307 | 124 | /** @addtogroup USART_LL_Exported_Functions |
| AnnaBridge | 167:e84263d55307 | 125 | * @{ |
| AnnaBridge | 167:e84263d55307 | 126 | */ |
| AnnaBridge | 167:e84263d55307 | 127 | |
| AnnaBridge | 167:e84263d55307 | 128 | /** @addtogroup USART_LL_EF_Init |
| AnnaBridge | 167:e84263d55307 | 129 | * @{ |
| AnnaBridge | 167:e84263d55307 | 130 | */ |
| AnnaBridge | 167:e84263d55307 | 131 | |
| AnnaBridge | 167:e84263d55307 | 132 | /** |
| AnnaBridge | 167:e84263d55307 | 133 | * @brief De-initialize USART registers (Registers restored to their default values). |
| AnnaBridge | 167:e84263d55307 | 134 | * @param USARTx USART Instance |
| AnnaBridge | 167:e84263d55307 | 135 | * @retval An ErrorStatus enumeration value: |
| AnnaBridge | 167:e84263d55307 | 136 | * - SUCCESS: USART registers are de-initialized |
| AnnaBridge | 167:e84263d55307 | 137 | * - ERROR: USART registers are not de-initialized |
| AnnaBridge | 167:e84263d55307 | 138 | */ |
| AnnaBridge | 167:e84263d55307 | 139 | ErrorStatus LL_USART_DeInit(USART_TypeDef *USARTx) |
| AnnaBridge | 167:e84263d55307 | 140 | { |
| AnnaBridge | 167:e84263d55307 | 141 | ErrorStatus status = SUCCESS; |
| AnnaBridge | 167:e84263d55307 | 142 | |
| AnnaBridge | 167:e84263d55307 | 143 | /* Check the parameters */ |
| AnnaBridge | 167:e84263d55307 | 144 | assert_param(IS_UART_INSTANCE(USARTx)); |
| AnnaBridge | 167:e84263d55307 | 145 | |
| AnnaBridge | 167:e84263d55307 | 146 | if (USARTx == USART1) |
| AnnaBridge | 167:e84263d55307 | 147 | { |
| AnnaBridge | 167:e84263d55307 | 148 | /* Force reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 149 | LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART1); |
| AnnaBridge | 167:e84263d55307 | 150 | |
| AnnaBridge | 167:e84263d55307 | 151 | /* Release reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 152 | LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART1); |
| AnnaBridge | 167:e84263d55307 | 153 | } |
| AnnaBridge | 167:e84263d55307 | 154 | else if (USARTx == USART2) |
| AnnaBridge | 167:e84263d55307 | 155 | { |
| AnnaBridge | 167:e84263d55307 | 156 | /* Force reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 157 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART2); |
| AnnaBridge | 167:e84263d55307 | 158 | |
| AnnaBridge | 167:e84263d55307 | 159 | /* Release reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 160 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART2); |
| AnnaBridge | 167:e84263d55307 | 161 | } |
| AnnaBridge | 167:e84263d55307 | 162 | else if (USARTx == USART3) |
| AnnaBridge | 167:e84263d55307 | 163 | { |
| AnnaBridge | 167:e84263d55307 | 164 | /* Force reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 165 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART3); |
| AnnaBridge | 167:e84263d55307 | 166 | |
| AnnaBridge | 167:e84263d55307 | 167 | /* Release reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 168 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART3); |
| AnnaBridge | 167:e84263d55307 | 169 | } |
| AnnaBridge | 167:e84263d55307 | 170 | else if (USARTx == USART6) |
| AnnaBridge | 167:e84263d55307 | 171 | { |
| AnnaBridge | 167:e84263d55307 | 172 | /* Force reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 173 | LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART6); |
| AnnaBridge | 167:e84263d55307 | 174 | |
| AnnaBridge | 167:e84263d55307 | 175 | /* Release reset of USART clock */ |
| AnnaBridge | 167:e84263d55307 | 176 | LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART6); |
| AnnaBridge | 167:e84263d55307 | 177 | } |
| AnnaBridge | 167:e84263d55307 | 178 | else if (USARTx == UART4) |
| AnnaBridge | 167:e84263d55307 | 179 | { |
| AnnaBridge | 167:e84263d55307 | 180 | /* Force reset of UART clock */ |
| AnnaBridge | 167:e84263d55307 | 181 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART4); |
| AnnaBridge | 167:e84263d55307 | 182 | |
| AnnaBridge | 167:e84263d55307 | 183 | /* Release reset of UART clock */ |
| AnnaBridge | 167:e84263d55307 | 184 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART4); |
| AnnaBridge | 167:e84263d55307 | 185 | } |
| AnnaBridge | 167:e84263d55307 | 186 | else if (USARTx == UART5) |
| AnnaBridge | 167:e84263d55307 | 187 | { |
| AnnaBridge | 167:e84263d55307 | 188 | /* Force reset of UART clock */ |
| AnnaBridge | 167:e84263d55307 | 189 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART5); |
| AnnaBridge | 167:e84263d55307 | 190 | |
| AnnaBridge | 167:e84263d55307 | 191 | /* Release reset of UART clock */ |
| AnnaBridge | 167:e84263d55307 | 192 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART5); |
| AnnaBridge | 167:e84263d55307 | 193 | } |
| AnnaBridge | 167:e84263d55307 | 194 | else |
| AnnaBridge | 167:e84263d55307 | 195 | { |
| AnnaBridge | 167:e84263d55307 | 196 | status = ERROR; |
| AnnaBridge | 167:e84263d55307 | 197 | } |
| AnnaBridge | 167:e84263d55307 | 198 | |
| AnnaBridge | 167:e84263d55307 | 199 | return (status); |
| AnnaBridge | 167:e84263d55307 | 200 | } |
| AnnaBridge | 167:e84263d55307 | 201 | |
| AnnaBridge | 167:e84263d55307 | 202 | /** |
| AnnaBridge | 167:e84263d55307 | 203 | * @brief Initialize USART registers according to the specified |
| AnnaBridge | 167:e84263d55307 | 204 | * parameters in USART_InitStruct. |
| AnnaBridge | 167:e84263d55307 | 205 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| AnnaBridge | 167:e84263d55307 | 206 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| AnnaBridge | 167:e84263d55307 | 207 | * @note Baud rate value stored in USART_InitStruct BaudRate field, should be valid (different from 0). |
| AnnaBridge | 167:e84263d55307 | 208 | * @param USARTx USART Instance |
| AnnaBridge | 167:e84263d55307 | 209 | * @param USART_InitStruct: pointer to a LL_USART_InitTypeDef structure |
| AnnaBridge | 167:e84263d55307 | 210 | * that contains the configuration information for the specified USART peripheral. |
| AnnaBridge | 167:e84263d55307 | 211 | * @retval An ErrorStatus enumeration value: |
| AnnaBridge | 167:e84263d55307 | 212 | * - SUCCESS: USART registers are initialized according to USART_InitStruct content |
| AnnaBridge | 167:e84263d55307 | 213 | * - ERROR: Problem occurred during USART Registers initialization |
| AnnaBridge | 167:e84263d55307 | 214 | */ |
| AnnaBridge | 167:e84263d55307 | 215 | ErrorStatus LL_USART_Init(USART_TypeDef *USARTx, LL_USART_InitTypeDef *USART_InitStruct) |
| AnnaBridge | 167:e84263d55307 | 216 | { |
| AnnaBridge | 167:e84263d55307 | 217 | ErrorStatus status = ERROR; |
| AnnaBridge | 167:e84263d55307 | 218 | uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO; |
| AnnaBridge | 167:e84263d55307 | 219 | LL_RCC_ClocksTypeDef rcc_clocks; |
| AnnaBridge | 167:e84263d55307 | 220 | |
| AnnaBridge | 167:e84263d55307 | 221 | /* Check the parameters */ |
| AnnaBridge | 167:e84263d55307 | 222 | assert_param(IS_UART_INSTANCE(USARTx)); |
| AnnaBridge | 167:e84263d55307 | 223 | assert_param(IS_LL_USART_BAUDRATE(USART_InitStruct->BaudRate)); |
| AnnaBridge | 167:e84263d55307 | 224 | assert_param(IS_LL_USART_DATAWIDTH(USART_InitStruct->DataWidth)); |
| AnnaBridge | 167:e84263d55307 | 225 | assert_param(IS_LL_USART_STOPBITS(USART_InitStruct->StopBits)); |
| AnnaBridge | 167:e84263d55307 | 226 | assert_param(IS_LL_USART_PARITY(USART_InitStruct->Parity)); |
| AnnaBridge | 167:e84263d55307 | 227 | assert_param(IS_LL_USART_DIRECTION(USART_InitStruct->TransferDirection)); |
| AnnaBridge | 167:e84263d55307 | 228 | assert_param(IS_LL_USART_HWCONTROL(USART_InitStruct->HardwareFlowControl)); |
| AnnaBridge | 167:e84263d55307 | 229 | assert_param(IS_LL_USART_OVERSAMPLING(USART_InitStruct->OverSampling)); |
| AnnaBridge | 167:e84263d55307 | 230 | |
| AnnaBridge | 167:e84263d55307 | 231 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
| AnnaBridge | 167:e84263d55307 | 232 | CRx registers */ |
| AnnaBridge | 167:e84263d55307 | 233 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| AnnaBridge | 167:e84263d55307 | 234 | { |
| AnnaBridge | 167:e84263d55307 | 235 | /*---------------------------- USART CR1 Configuration ----------------------- |
| AnnaBridge | 167:e84263d55307 | 236 | * Configure USARTx CR1 (USART Word Length, Parity, Mode and Oversampling bits) with parameters: |
| AnnaBridge | 167:e84263d55307 | 237 | * - DataWidth: USART_CR1_M bits according to USART_InitStruct->DataWidth value |
| AnnaBridge | 167:e84263d55307 | 238 | * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to USART_InitStruct->Parity value |
| AnnaBridge | 167:e84263d55307 | 239 | * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to USART_InitStruct->TransferDirection value |
| AnnaBridge | 167:e84263d55307 | 240 | * - Oversampling: USART_CR1_OVER8 bit according to USART_InitStruct->OverSampling value. |
| AnnaBridge | 167:e84263d55307 | 241 | */ |
| AnnaBridge | 167:e84263d55307 | 242 | MODIFY_REG(USARTx->CR1, |
| AnnaBridge | 167:e84263d55307 | 243 | (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | |
| AnnaBridge | 167:e84263d55307 | 244 | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8), |
| AnnaBridge | 167:e84263d55307 | 245 | (USART_InitStruct->DataWidth | USART_InitStruct->Parity | |
| AnnaBridge | 167:e84263d55307 | 246 | USART_InitStruct->TransferDirection | USART_InitStruct->OverSampling)); |
| AnnaBridge | 167:e84263d55307 | 247 | |
| AnnaBridge | 167:e84263d55307 | 248 | /*---------------------------- USART CR2 Configuration ----------------------- |
| AnnaBridge | 167:e84263d55307 | 249 | * Configure USARTx CR2 (Stop bits) with parameters: |
| AnnaBridge | 167:e84263d55307 | 250 | * - Stop Bits: USART_CR2_STOP bits according to USART_InitStruct->StopBits value. |
| AnnaBridge | 167:e84263d55307 | 251 | * - CLKEN, CPOL, CPHA and LBCL bits are to be configured using LL_USART_ClockInit(). |
| AnnaBridge | 167:e84263d55307 | 252 | */ |
| AnnaBridge | 167:e84263d55307 | 253 | LL_USART_SetStopBitsLength(USARTx, USART_InitStruct->StopBits); |
| AnnaBridge | 167:e84263d55307 | 254 | |
| AnnaBridge | 167:e84263d55307 | 255 | /*---------------------------- USART CR3 Configuration ----------------------- |
| AnnaBridge | 167:e84263d55307 | 256 | * Configure USARTx CR3 (Hardware Flow Control) with parameters: |
| AnnaBridge | 167:e84263d55307 | 257 | * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to USART_InitStruct->HardwareFlowControl value. |
| AnnaBridge | 167:e84263d55307 | 258 | */ |
| AnnaBridge | 167:e84263d55307 | 259 | LL_USART_SetHWFlowCtrl(USARTx, USART_InitStruct->HardwareFlowControl); |
| AnnaBridge | 167:e84263d55307 | 260 | |
| AnnaBridge | 167:e84263d55307 | 261 | /*---------------------------- USART BRR Configuration ----------------------- |
| AnnaBridge | 167:e84263d55307 | 262 | * Retrieve Clock frequency used for USART Peripheral |
| AnnaBridge | 167:e84263d55307 | 263 | */ |
| AnnaBridge | 167:e84263d55307 | 264 | LL_RCC_GetSystemClocksFreq(&rcc_clocks); |
| AnnaBridge | 167:e84263d55307 | 265 | if (USARTx == USART1) |
| AnnaBridge | 167:e84263d55307 | 266 | { |
| AnnaBridge | 167:e84263d55307 | 267 | periphclk = rcc_clocks.PCLK2_Frequency; |
| AnnaBridge | 167:e84263d55307 | 268 | } |
| AnnaBridge | 167:e84263d55307 | 269 | else if (USARTx == USART2) |
| AnnaBridge | 167:e84263d55307 | 270 | { |
| AnnaBridge | 167:e84263d55307 | 271 | periphclk = rcc_clocks.PCLK1_Frequency; |
| AnnaBridge | 167:e84263d55307 | 272 | } |
| AnnaBridge | 167:e84263d55307 | 273 | else if (USARTx == USART3) |
| AnnaBridge | 167:e84263d55307 | 274 | { |
| AnnaBridge | 167:e84263d55307 | 275 | periphclk = rcc_clocks.PCLK1_Frequency; |
| AnnaBridge | 167:e84263d55307 | 276 | } |
| AnnaBridge | 167:e84263d55307 | 277 | else if (USARTx == USART6) |
| AnnaBridge | 167:e84263d55307 | 278 | { |
| AnnaBridge | 167:e84263d55307 | 279 | periphclk = rcc_clocks.PCLK2_Frequency; |
| AnnaBridge | 167:e84263d55307 | 280 | } |
| AnnaBridge | 167:e84263d55307 | 281 | else if (USARTx == UART4) |
| AnnaBridge | 167:e84263d55307 | 282 | { |
| AnnaBridge | 167:e84263d55307 | 283 | periphclk = rcc_clocks.PCLK1_Frequency; |
| AnnaBridge | 167:e84263d55307 | 284 | } |
| AnnaBridge | 167:e84263d55307 | 285 | else if (USARTx == UART5) |
| AnnaBridge | 167:e84263d55307 | 286 | { |
| AnnaBridge | 167:e84263d55307 | 287 | periphclk = rcc_clocks.PCLK1_Frequency; |
| AnnaBridge | 167:e84263d55307 | 288 | } |
| AnnaBridge | 167:e84263d55307 | 289 | else |
| AnnaBridge | 167:e84263d55307 | 290 | { |
| AnnaBridge | 167:e84263d55307 | 291 | /* Nothing to do, as error code is already assigned to ERROR value */ |
| AnnaBridge | 167:e84263d55307 | 292 | } |
| AnnaBridge | 167:e84263d55307 | 293 | |
| AnnaBridge | 167:e84263d55307 | 294 | /* Configure the USART Baud Rate : |
| AnnaBridge | 167:e84263d55307 | 295 | - valid baud rate value (different from 0) is required |
| AnnaBridge | 167:e84263d55307 | 296 | - Peripheral clock as returned by RCC service, should be valid (different from 0). |
| AnnaBridge | 167:e84263d55307 | 297 | */ |
| AnnaBridge | 167:e84263d55307 | 298 | if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO) |
| AnnaBridge | 167:e84263d55307 | 299 | && (USART_InitStruct->BaudRate != 0U)) |
| AnnaBridge | 167:e84263d55307 | 300 | { |
| AnnaBridge | 167:e84263d55307 | 301 | status = SUCCESS; |
| AnnaBridge | 167:e84263d55307 | 302 | LL_USART_SetBaudRate(USARTx, |
| AnnaBridge | 167:e84263d55307 | 303 | periphclk, |
| AnnaBridge | 167:e84263d55307 | 304 | USART_InitStruct->OverSampling, |
| AnnaBridge | 167:e84263d55307 | 305 | USART_InitStruct->BaudRate); |
| AnnaBridge | 167:e84263d55307 | 306 | } |
| AnnaBridge | 167:e84263d55307 | 307 | } |
| AnnaBridge | 167:e84263d55307 | 308 | /* Endif (=> USART not in Disabled state => return ERROR) */ |
| AnnaBridge | 167:e84263d55307 | 309 | |
| AnnaBridge | 167:e84263d55307 | 310 | return (status); |
| AnnaBridge | 167:e84263d55307 | 311 | } |
| AnnaBridge | 167:e84263d55307 | 312 | |
| AnnaBridge | 167:e84263d55307 | 313 | /** |
| AnnaBridge | 167:e84263d55307 | 314 | * @brief Set each @ref LL_USART_InitTypeDef field to default value. |
| AnnaBridge | 167:e84263d55307 | 315 | * @param USART_InitStruct: pointer to a @ref LL_USART_InitTypeDef structure |
| AnnaBridge | 167:e84263d55307 | 316 | * whose fields will be set to default values. |
| AnnaBridge | 167:e84263d55307 | 317 | * @retval None |
| AnnaBridge | 167:e84263d55307 | 318 | */ |
| AnnaBridge | 167:e84263d55307 | 319 | |
| AnnaBridge | 167:e84263d55307 | 320 | void LL_USART_StructInit(LL_USART_InitTypeDef *USART_InitStruct) |
| AnnaBridge | 167:e84263d55307 | 321 | { |
| AnnaBridge | 167:e84263d55307 | 322 | /* Set USART_InitStruct fields to default values */ |
| AnnaBridge | 167:e84263d55307 | 323 | USART_InitStruct->BaudRate = 9600U; |
| AnnaBridge | 167:e84263d55307 | 324 | USART_InitStruct->DataWidth = LL_USART_DATAWIDTH_8B; |
| AnnaBridge | 167:e84263d55307 | 325 | USART_InitStruct->StopBits = LL_USART_STOPBITS_1; |
| AnnaBridge | 167:e84263d55307 | 326 | USART_InitStruct->Parity = LL_USART_PARITY_NONE ; |
| AnnaBridge | 167:e84263d55307 | 327 | USART_InitStruct->TransferDirection = LL_USART_DIRECTION_TX_RX; |
| AnnaBridge | 167:e84263d55307 | 328 | USART_InitStruct->HardwareFlowControl = LL_USART_HWCONTROL_NONE; |
| AnnaBridge | 167:e84263d55307 | 329 | USART_InitStruct->OverSampling = LL_USART_OVERSAMPLING_16; |
| AnnaBridge | 167:e84263d55307 | 330 | } |
| AnnaBridge | 167:e84263d55307 | 331 | |
| AnnaBridge | 167:e84263d55307 | 332 | /** |
| AnnaBridge | 167:e84263d55307 | 333 | * @brief Initialize USART Clock related settings according to the |
| AnnaBridge | 167:e84263d55307 | 334 | * specified parameters in the USART_ClockInitStruct. |
| AnnaBridge | 167:e84263d55307 | 335 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| AnnaBridge | 167:e84263d55307 | 336 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| AnnaBridge | 167:e84263d55307 | 337 | * @param USARTx USART Instance |
| AnnaBridge | 167:e84263d55307 | 338 | * @param USART_ClockInitStruct: pointer to a @ref LL_USART_ClockInitTypeDef structure |
| AnnaBridge | 167:e84263d55307 | 339 | * that contains the Clock configuration information for the specified USART peripheral. |
| AnnaBridge | 167:e84263d55307 | 340 | * @retval An ErrorStatus enumeration value: |
| AnnaBridge | 167:e84263d55307 | 341 | * - SUCCESS: USART registers related to Clock settings are initialized according to USART_ClockInitStruct content |
| AnnaBridge | 167:e84263d55307 | 342 | * - ERROR: Problem occurred during USART Registers initialization |
| AnnaBridge | 167:e84263d55307 | 343 | */ |
| AnnaBridge | 167:e84263d55307 | 344 | ErrorStatus LL_USART_ClockInit(USART_TypeDef *USARTx, LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| AnnaBridge | 167:e84263d55307 | 345 | { |
| AnnaBridge | 167:e84263d55307 | 346 | ErrorStatus status = SUCCESS; |
| AnnaBridge | 167:e84263d55307 | 347 | |
| AnnaBridge | 167:e84263d55307 | 348 | /* Check USART Instance and Clock signal output parameters */ |
| AnnaBridge | 167:e84263d55307 | 349 | assert_param(IS_UART_INSTANCE(USARTx)); |
| AnnaBridge | 167:e84263d55307 | 350 | assert_param(IS_LL_USART_CLOCKOUTPUT(USART_ClockInitStruct->ClockOutput)); |
| AnnaBridge | 167:e84263d55307 | 351 | |
| AnnaBridge | 167:e84263d55307 | 352 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
| AnnaBridge | 167:e84263d55307 | 353 | CRx registers */ |
| AnnaBridge | 167:e84263d55307 | 354 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| AnnaBridge | 167:e84263d55307 | 355 | { |
| AnnaBridge | 167:e84263d55307 | 356 | /*---------------------------- USART CR2 Configuration -----------------------*/ |
| AnnaBridge | 167:e84263d55307 | 357 | /* If Clock signal has to be output */ |
| AnnaBridge | 167:e84263d55307 | 358 | if (USART_ClockInitStruct->ClockOutput == LL_USART_CLOCK_DISABLE) |
| AnnaBridge | 167:e84263d55307 | 359 | { |
| AnnaBridge | 167:e84263d55307 | 360 | /* Deactivate Clock signal delivery : |
| AnnaBridge | 167:e84263d55307 | 361 | * - Disable Clock Output: USART_CR2_CLKEN cleared |
| AnnaBridge | 167:e84263d55307 | 362 | */ |
| AnnaBridge | 167:e84263d55307 | 363 | LL_USART_DisableSCLKOutput(USARTx); |
| AnnaBridge | 167:e84263d55307 | 364 | } |
| AnnaBridge | 167:e84263d55307 | 365 | else |
| AnnaBridge | 167:e84263d55307 | 366 | { |
| AnnaBridge | 167:e84263d55307 | 367 | /* Ensure USART instance is USART capable */ |
| AnnaBridge | 167:e84263d55307 | 368 | assert_param(IS_USART_INSTANCE(USARTx)); |
| AnnaBridge | 167:e84263d55307 | 369 | |
| AnnaBridge | 167:e84263d55307 | 370 | /* Check clock related parameters */ |
| AnnaBridge | 167:e84263d55307 | 371 | assert_param(IS_LL_USART_CLOCKPOLARITY(USART_ClockInitStruct->ClockPolarity)); |
| AnnaBridge | 167:e84263d55307 | 372 | assert_param(IS_LL_USART_CLOCKPHASE(USART_ClockInitStruct->ClockPhase)); |
| AnnaBridge | 167:e84263d55307 | 373 | assert_param(IS_LL_USART_LASTBITCLKOUTPUT(USART_ClockInitStruct->LastBitClockPulse)); |
| AnnaBridge | 167:e84263d55307 | 374 | |
| AnnaBridge | 167:e84263d55307 | 375 | /*---------------------------- USART CR2 Configuration ----------------------- |
| AnnaBridge | 167:e84263d55307 | 376 | * Configure USARTx CR2 (Clock signal related bits) with parameters: |
| AnnaBridge | 167:e84263d55307 | 377 | * - Enable Clock Output: USART_CR2_CLKEN set |
| AnnaBridge | 167:e84263d55307 | 378 | * - Clock Polarity: USART_CR2_CPOL bit according to USART_ClockInitStruct->ClockPolarity value |
| AnnaBridge | 167:e84263d55307 | 379 | * - Clock Phase: USART_CR2_CPHA bit according to USART_ClockInitStruct->ClockPhase value |
| AnnaBridge | 167:e84263d55307 | 380 | * - Last Bit Clock Pulse Output: USART_CR2_LBCL bit according to USART_ClockInitStruct->LastBitClockPulse value. |
| AnnaBridge | 167:e84263d55307 | 381 | */ |
| AnnaBridge | 167:e84263d55307 | 382 | MODIFY_REG(USARTx->CR2, |
| AnnaBridge | 167:e84263d55307 | 383 | USART_CR2_CLKEN | USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_LBCL, |
| AnnaBridge | 167:e84263d55307 | 384 | USART_CR2_CLKEN | USART_ClockInitStruct->ClockPolarity | |
| AnnaBridge | 167:e84263d55307 | 385 | USART_ClockInitStruct->ClockPhase | USART_ClockInitStruct->LastBitClockPulse); |
| AnnaBridge | 167:e84263d55307 | 386 | } |
| AnnaBridge | 167:e84263d55307 | 387 | } |
| AnnaBridge | 167:e84263d55307 | 388 | /* Else (USART not in Disabled state => return ERROR */ |
| AnnaBridge | 167:e84263d55307 | 389 | else |
| AnnaBridge | 167:e84263d55307 | 390 | { |
| AnnaBridge | 167:e84263d55307 | 391 | status = ERROR; |
| AnnaBridge | 167:e84263d55307 | 392 | } |
| AnnaBridge | 167:e84263d55307 | 393 | |
| AnnaBridge | 167:e84263d55307 | 394 | return (status); |
| AnnaBridge | 167:e84263d55307 | 395 | } |
| AnnaBridge | 167:e84263d55307 | 396 | |
| AnnaBridge | 167:e84263d55307 | 397 | /** |
| AnnaBridge | 167:e84263d55307 | 398 | * @brief Set each field of a @ref LL_USART_ClockInitTypeDef type structure to default value. |
| AnnaBridge | 167:e84263d55307 | 399 | * @param USART_ClockInitStruct: pointer to a @ref LL_USART_ClockInitTypeDef structure |
| AnnaBridge | 167:e84263d55307 | 400 | * whose fields will be set to default values. |
| AnnaBridge | 167:e84263d55307 | 401 | * @retval None |
| AnnaBridge | 167:e84263d55307 | 402 | */ |
| AnnaBridge | 167:e84263d55307 | 403 | void LL_USART_ClockStructInit(LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| AnnaBridge | 167:e84263d55307 | 404 | { |
| AnnaBridge | 167:e84263d55307 | 405 | /* Set LL_USART_ClockInitStruct fields with default values */ |
| AnnaBridge | 167:e84263d55307 | 406 | USART_ClockInitStruct->ClockOutput = LL_USART_CLOCK_DISABLE; |
| AnnaBridge | 167:e84263d55307 | 407 | USART_ClockInitStruct->ClockPolarity = LL_USART_POLARITY_LOW; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| AnnaBridge | 167:e84263d55307 | 408 | USART_ClockInitStruct->ClockPhase = LL_USART_PHASE_1EDGE; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| AnnaBridge | 167:e84263d55307 | 409 | USART_ClockInitStruct->LastBitClockPulse = LL_USART_LASTCLKPULSE_NO_OUTPUT; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| AnnaBridge | 167:e84263d55307 | 410 | } |
| AnnaBridge | 167:e84263d55307 | 411 | |
| AnnaBridge | 167:e84263d55307 | 412 | /** |
| AnnaBridge | 167:e84263d55307 | 413 | * @} |
| AnnaBridge | 167:e84263d55307 | 414 | */ |
| AnnaBridge | 167:e84263d55307 | 415 | |
| AnnaBridge | 167:e84263d55307 | 416 | /** |
| AnnaBridge | 167:e84263d55307 | 417 | * @} |
| AnnaBridge | 167:e84263d55307 | 418 | */ |
| AnnaBridge | 167:e84263d55307 | 419 | |
| AnnaBridge | 167:e84263d55307 | 420 | /** |
| AnnaBridge | 167:e84263d55307 | 421 | * @} |
| AnnaBridge | 167:e84263d55307 | 422 | */ |
| AnnaBridge | 167:e84263d55307 | 423 | |
| AnnaBridge | 167:e84263d55307 | 424 | #endif /* USART1 || USART2 || USART3 || USART6 || UART4 || UART5 */ |
| AnnaBridge | 167:e84263d55307 | 425 | |
| AnnaBridge | 167:e84263d55307 | 426 | /** |
| AnnaBridge | 167:e84263d55307 | 427 | * @} |
| AnnaBridge | 167:e84263d55307 | 428 | */ |
| AnnaBridge | 167:e84263d55307 | 429 | |
| AnnaBridge | 167:e84263d55307 | 430 | #endif /* USE_FULL_LL_DRIVER */ |
| AnnaBridge | 167:e84263d55307 | 431 | |
| AnnaBridge | 167:e84263d55307 | 432 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
| AnnaBridge | 167:e84263d55307 | 433 |
