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HAL_L476/stm32l4xx_ll_usart.c@1:d0dfbce63a89, 2017-02-24 (annotated)
- Committer:
- elmot
- Date:
- Fri Feb 24 21:13:56 2017 +0000
- Revision:
- 1:d0dfbce63a89
Ready-to-copy
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| elmot | 1:d0dfbce63a89 | 1 | /** |
| elmot | 1:d0dfbce63a89 | 2 | ****************************************************************************** |
| elmot | 1:d0dfbce63a89 | 3 | * @file stm32l4xx_ll_usart.c |
| elmot | 1:d0dfbce63a89 | 4 | * @author MCD Application Team |
| elmot | 1:d0dfbce63a89 | 5 | * @version V1.5.1 |
| elmot | 1:d0dfbce63a89 | 6 | * @date 31-May-2016 |
| elmot | 1:d0dfbce63a89 | 7 | * @brief USART LL module driver. |
| elmot | 1:d0dfbce63a89 | 8 | ****************************************************************************** |
| elmot | 1:d0dfbce63a89 | 9 | * @attention |
| elmot | 1:d0dfbce63a89 | 10 | * |
| elmot | 1:d0dfbce63a89 | 11 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
| elmot | 1:d0dfbce63a89 | 12 | * |
| elmot | 1:d0dfbce63a89 | 13 | * Redistribution and use in source and binary forms, with or without modification, |
| elmot | 1:d0dfbce63a89 | 14 | * are permitted provided that the following conditions are met: |
| elmot | 1:d0dfbce63a89 | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
| elmot | 1:d0dfbce63a89 | 16 | * this list of conditions and the following disclaimer. |
| elmot | 1:d0dfbce63a89 | 17 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| elmot | 1:d0dfbce63a89 | 18 | * this list of conditions and the following disclaimer in the documentation |
| elmot | 1:d0dfbce63a89 | 19 | * and/or other materials provided with the distribution. |
| elmot | 1:d0dfbce63a89 | 20 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| elmot | 1:d0dfbce63a89 | 21 | * may be used to endorse or promote products derived from this software |
| elmot | 1:d0dfbce63a89 | 22 | * without specific prior written permission. |
| elmot | 1:d0dfbce63a89 | 23 | * |
| elmot | 1:d0dfbce63a89 | 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| elmot | 1:d0dfbce63a89 | 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| elmot | 1:d0dfbce63a89 | 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| elmot | 1:d0dfbce63a89 | 27 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| elmot | 1:d0dfbce63a89 | 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| elmot | 1:d0dfbce63a89 | 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| elmot | 1:d0dfbce63a89 | 30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| elmot | 1:d0dfbce63a89 | 31 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| elmot | 1:d0dfbce63a89 | 32 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| elmot | 1:d0dfbce63a89 | 33 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| elmot | 1:d0dfbce63a89 | 34 | * |
| elmot | 1:d0dfbce63a89 | 35 | ****************************************************************************** |
| elmot | 1:d0dfbce63a89 | 36 | */ |
| elmot | 1:d0dfbce63a89 | 37 | #if defined(USE_FULL_LL_DRIVER) |
| elmot | 1:d0dfbce63a89 | 38 | |
| elmot | 1:d0dfbce63a89 | 39 | /* Includes ------------------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 40 | #include "stm32l4xx_ll_usart.h" |
| elmot | 1:d0dfbce63a89 | 41 | #include "stm32l4xx_ll_rcc.h" |
| elmot | 1:d0dfbce63a89 | 42 | #include "stm32l4xx_ll_bus.h" |
| elmot | 1:d0dfbce63a89 | 43 | #ifdef USE_FULL_ASSERT |
| elmot | 1:d0dfbce63a89 | 44 | #include "stm32_assert.h" |
| elmot | 1:d0dfbce63a89 | 45 | #else |
| elmot | 1:d0dfbce63a89 | 46 | #define assert_param(expr) ((void)0U) |
| elmot | 1:d0dfbce63a89 | 47 | #endif |
| elmot | 1:d0dfbce63a89 | 48 | |
| elmot | 1:d0dfbce63a89 | 49 | /** @addtogroup STM32L4xx_LL_Driver |
| elmot | 1:d0dfbce63a89 | 50 | * @{ |
| elmot | 1:d0dfbce63a89 | 51 | */ |
| elmot | 1:d0dfbce63a89 | 52 | |
| elmot | 1:d0dfbce63a89 | 53 | #if defined (USART1) || defined (USART2) || defined (USART3) || defined (UART4) || defined (UART5) |
| elmot | 1:d0dfbce63a89 | 54 | |
| elmot | 1:d0dfbce63a89 | 55 | /** @addtogroup USART_LL |
| elmot | 1:d0dfbce63a89 | 56 | * @{ |
| elmot | 1:d0dfbce63a89 | 57 | */ |
| elmot | 1:d0dfbce63a89 | 58 | |
| elmot | 1:d0dfbce63a89 | 59 | /* Private types -------------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 60 | /* Private variables ---------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 61 | /* Private constants ---------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 62 | /** @addtogroup USART_LL_Private_Constants |
| elmot | 1:d0dfbce63a89 | 63 | * @{ |
| elmot | 1:d0dfbce63a89 | 64 | */ |
| elmot | 1:d0dfbce63a89 | 65 | |
| elmot | 1:d0dfbce63a89 | 66 | /** |
| elmot | 1:d0dfbce63a89 | 67 | * @} |
| elmot | 1:d0dfbce63a89 | 68 | */ |
| elmot | 1:d0dfbce63a89 | 69 | |
| elmot | 1:d0dfbce63a89 | 70 | |
| elmot | 1:d0dfbce63a89 | 71 | /* Private macros ------------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 72 | /** @addtogroup USART_LL_Private_Macros |
| elmot | 1:d0dfbce63a89 | 73 | * @{ |
| elmot | 1:d0dfbce63a89 | 74 | */ |
| elmot | 1:d0dfbce63a89 | 75 | |
| elmot | 1:d0dfbce63a89 | 76 | /* __BAUDRATE__ The maximum Baud Rate is derived from the maximum clock available |
| elmot | 1:d0dfbce63a89 | 77 | * divided by the smallest oversampling used on the USART (i.e. 8) */ |
| elmot | 1:d0dfbce63a89 | 78 | #define IS_LL_USART_BAUDRATE(__BAUDRATE__) ((__BAUDRATE__) <= 10000000U) |
| elmot | 1:d0dfbce63a89 | 79 | |
| elmot | 1:d0dfbce63a89 | 80 | #define IS_LL_USART_DIRECTION(__VALUE__) (((__VALUE__) == LL_USART_DIRECTION_NONE) \ |
| elmot | 1:d0dfbce63a89 | 81 | || ((__VALUE__) == LL_USART_DIRECTION_RX) \ |
| elmot | 1:d0dfbce63a89 | 82 | || ((__VALUE__) == LL_USART_DIRECTION_TX) \ |
| elmot | 1:d0dfbce63a89 | 83 | || ((__VALUE__) == LL_USART_DIRECTION_TX_RX)) |
| elmot | 1:d0dfbce63a89 | 84 | |
| elmot | 1:d0dfbce63a89 | 85 | #define IS_LL_USART_PARITY(__VALUE__) (((__VALUE__) == LL_USART_PARITY_NONE) \ |
| elmot | 1:d0dfbce63a89 | 86 | || ((__VALUE__) == LL_USART_PARITY_EVEN) \ |
| elmot | 1:d0dfbce63a89 | 87 | || ((__VALUE__) == LL_USART_PARITY_ODD)) |
| elmot | 1:d0dfbce63a89 | 88 | |
| elmot | 1:d0dfbce63a89 | 89 | #define IS_LL_USART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_USART_DATAWIDTH_7B) \ |
| elmot | 1:d0dfbce63a89 | 90 | || ((__VALUE__) == LL_USART_DATAWIDTH_8B) \ |
| elmot | 1:d0dfbce63a89 | 91 | || ((__VALUE__) == LL_USART_DATAWIDTH_9B)) |
| elmot | 1:d0dfbce63a89 | 92 | |
| elmot | 1:d0dfbce63a89 | 93 | #define IS_LL_USART_OVERSAMPLING(__VALUE__) (((__VALUE__) == LL_USART_OVERSAMPLING_16) \ |
| elmot | 1:d0dfbce63a89 | 94 | || ((__VALUE__) == LL_USART_OVERSAMPLING_8)) |
| elmot | 1:d0dfbce63a89 | 95 | |
| elmot | 1:d0dfbce63a89 | 96 | #define IS_LL_USART_LASTBITCLKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_LASTCLKPULSE_NO_OUTPUT) \ |
| elmot | 1:d0dfbce63a89 | 97 | || ((__VALUE__) == LL_USART_LASTCLKPULSE_OUTPUT)) |
| elmot | 1:d0dfbce63a89 | 98 | |
| elmot | 1:d0dfbce63a89 | 99 | #define IS_LL_USART_CLOCKPHASE(__VALUE__) (((__VALUE__) == LL_USART_PHASE_1EDGE) \ |
| elmot | 1:d0dfbce63a89 | 100 | || ((__VALUE__) == LL_USART_PHASE_2EDGE)) |
| elmot | 1:d0dfbce63a89 | 101 | |
| elmot | 1:d0dfbce63a89 | 102 | #define IS_LL_USART_CLOCKPOLARITY(__VALUE__) (((__VALUE__) == LL_USART_POLARITY_LOW) \ |
| elmot | 1:d0dfbce63a89 | 103 | || ((__VALUE__) == LL_USART_POLARITY_HIGH)) |
| elmot | 1:d0dfbce63a89 | 104 | |
| elmot | 1:d0dfbce63a89 | 105 | #define IS_LL_USART_CLOCKOUTPUT(__VALUE__) (((__VALUE__) == LL_USART_CLOCK_DISABLE) \ |
| elmot | 1:d0dfbce63a89 | 106 | || ((__VALUE__) == LL_USART_CLOCK_ENABLE)) |
| elmot | 1:d0dfbce63a89 | 107 | |
| elmot | 1:d0dfbce63a89 | 108 | #define IS_LL_USART_STOPBITS(__VALUE__) (((__VALUE__) == LL_USART_STOPBITS_0_5) \ |
| elmot | 1:d0dfbce63a89 | 109 | || ((__VALUE__) == LL_USART_STOPBITS_1) \ |
| elmot | 1:d0dfbce63a89 | 110 | || ((__VALUE__) == LL_USART_STOPBITS_1_5) \ |
| elmot | 1:d0dfbce63a89 | 111 | || ((__VALUE__) == LL_USART_STOPBITS_2)) |
| elmot | 1:d0dfbce63a89 | 112 | |
| elmot | 1:d0dfbce63a89 | 113 | #define IS_LL_USART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_USART_HWCONTROL_NONE) \ |
| elmot | 1:d0dfbce63a89 | 114 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS) \ |
| elmot | 1:d0dfbce63a89 | 115 | || ((__VALUE__) == LL_USART_HWCONTROL_CTS) \ |
| elmot | 1:d0dfbce63a89 | 116 | || ((__VALUE__) == LL_USART_HWCONTROL_RTS_CTS)) |
| elmot | 1:d0dfbce63a89 | 117 | |
| elmot | 1:d0dfbce63a89 | 118 | /** |
| elmot | 1:d0dfbce63a89 | 119 | * @} |
| elmot | 1:d0dfbce63a89 | 120 | */ |
| elmot | 1:d0dfbce63a89 | 121 | |
| elmot | 1:d0dfbce63a89 | 122 | /* Private function prototypes -----------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 123 | |
| elmot | 1:d0dfbce63a89 | 124 | /* Exported functions --------------------------------------------------------*/ |
| elmot | 1:d0dfbce63a89 | 125 | /** @addtogroup USART_LL_Exported_Functions |
| elmot | 1:d0dfbce63a89 | 126 | * @{ |
| elmot | 1:d0dfbce63a89 | 127 | */ |
| elmot | 1:d0dfbce63a89 | 128 | |
| elmot | 1:d0dfbce63a89 | 129 | /** @addtogroup USART_LL_EF_Init |
| elmot | 1:d0dfbce63a89 | 130 | * @{ |
| elmot | 1:d0dfbce63a89 | 131 | */ |
| elmot | 1:d0dfbce63a89 | 132 | |
| elmot | 1:d0dfbce63a89 | 133 | /** |
| elmot | 1:d0dfbce63a89 | 134 | * @brief De-initialize USART registers (Registers restored to their default values). |
| elmot | 1:d0dfbce63a89 | 135 | * @param USARTx USART Instance |
| elmot | 1:d0dfbce63a89 | 136 | * @retval An ErrorStatus enumeration value: |
| elmot | 1:d0dfbce63a89 | 137 | * - SUCCESS: USART registers are de-initialized |
| elmot | 1:d0dfbce63a89 | 138 | * - ERROR: USART registers are not de-initialized |
| elmot | 1:d0dfbce63a89 | 139 | */ |
| elmot | 1:d0dfbce63a89 | 140 | ErrorStatus LL_USART_DeInit(USART_TypeDef *USARTx) |
| elmot | 1:d0dfbce63a89 | 141 | { |
| elmot | 1:d0dfbce63a89 | 142 | ErrorStatus status = SUCCESS; |
| elmot | 1:d0dfbce63a89 | 143 | |
| elmot | 1:d0dfbce63a89 | 144 | /* Check the parameters */ |
| elmot | 1:d0dfbce63a89 | 145 | assert_param(IS_UART_INSTANCE(USARTx)); |
| elmot | 1:d0dfbce63a89 | 146 | |
| elmot | 1:d0dfbce63a89 | 147 | if (USARTx == USART1) |
| elmot | 1:d0dfbce63a89 | 148 | { |
| elmot | 1:d0dfbce63a89 | 149 | /* Force reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 150 | LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_USART1); |
| elmot | 1:d0dfbce63a89 | 151 | |
| elmot | 1:d0dfbce63a89 | 152 | /* Release reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 153 | LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_USART1); |
| elmot | 1:d0dfbce63a89 | 154 | } |
| elmot | 1:d0dfbce63a89 | 155 | else if (USARTx == USART2) |
| elmot | 1:d0dfbce63a89 | 156 | { |
| elmot | 1:d0dfbce63a89 | 157 | /* Force reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 158 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART2); |
| elmot | 1:d0dfbce63a89 | 159 | |
| elmot | 1:d0dfbce63a89 | 160 | /* Release reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 161 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART2); |
| elmot | 1:d0dfbce63a89 | 162 | } |
| elmot | 1:d0dfbce63a89 | 163 | #if defined(USART3) |
| elmot | 1:d0dfbce63a89 | 164 | else if (USARTx == USART3) |
| elmot | 1:d0dfbce63a89 | 165 | { |
| elmot | 1:d0dfbce63a89 | 166 | /* Force reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 167 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_USART3); |
| elmot | 1:d0dfbce63a89 | 168 | |
| elmot | 1:d0dfbce63a89 | 169 | /* Release reset of USART clock */ |
| elmot | 1:d0dfbce63a89 | 170 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_USART3); |
| elmot | 1:d0dfbce63a89 | 171 | } |
| elmot | 1:d0dfbce63a89 | 172 | #endif /* USART3 */ |
| elmot | 1:d0dfbce63a89 | 173 | #if defined(UART4) |
| elmot | 1:d0dfbce63a89 | 174 | else if (USARTx == UART4) |
| elmot | 1:d0dfbce63a89 | 175 | { |
| elmot | 1:d0dfbce63a89 | 176 | /* Force reset of UART clock */ |
| elmot | 1:d0dfbce63a89 | 177 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART4); |
| elmot | 1:d0dfbce63a89 | 178 | |
| elmot | 1:d0dfbce63a89 | 179 | /* Release reset of UART clock */ |
| elmot | 1:d0dfbce63a89 | 180 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART4); |
| elmot | 1:d0dfbce63a89 | 181 | } |
| elmot | 1:d0dfbce63a89 | 182 | #endif /* UART4 */ |
| elmot | 1:d0dfbce63a89 | 183 | #if defined(UART5) |
| elmot | 1:d0dfbce63a89 | 184 | else if (USARTx == UART5) |
| elmot | 1:d0dfbce63a89 | 185 | { |
| elmot | 1:d0dfbce63a89 | 186 | /* Force reset of UART clock */ |
| elmot | 1:d0dfbce63a89 | 187 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_UART5); |
| elmot | 1:d0dfbce63a89 | 188 | |
| elmot | 1:d0dfbce63a89 | 189 | /* Release reset of UART clock */ |
| elmot | 1:d0dfbce63a89 | 190 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_UART5); |
| elmot | 1:d0dfbce63a89 | 191 | } |
| elmot | 1:d0dfbce63a89 | 192 | #endif /* UART5 */ |
| elmot | 1:d0dfbce63a89 | 193 | else |
| elmot | 1:d0dfbce63a89 | 194 | { |
| elmot | 1:d0dfbce63a89 | 195 | status = ERROR; |
| elmot | 1:d0dfbce63a89 | 196 | } |
| elmot | 1:d0dfbce63a89 | 197 | |
| elmot | 1:d0dfbce63a89 | 198 | return (status); |
| elmot | 1:d0dfbce63a89 | 199 | } |
| elmot | 1:d0dfbce63a89 | 200 | |
| elmot | 1:d0dfbce63a89 | 201 | /** |
| elmot | 1:d0dfbce63a89 | 202 | * @brief Initialize USART registers according to the specified |
| elmot | 1:d0dfbce63a89 | 203 | * parameters in USART_InitStruct. |
| elmot | 1:d0dfbce63a89 | 204 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| elmot | 1:d0dfbce63a89 | 205 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| elmot | 1:d0dfbce63a89 | 206 | * @note Baud rate value stored in USART_InitStruct BaudRate field, should be valid (different from 0). |
| elmot | 1:d0dfbce63a89 | 207 | * @param USARTx USART Instance |
| elmot | 1:d0dfbce63a89 | 208 | * @param USART_InitStruct: pointer to a LL_USART_InitTypeDef structure |
| elmot | 1:d0dfbce63a89 | 209 | * that contains the configuration information for the specified USART peripheral. |
| elmot | 1:d0dfbce63a89 | 210 | * @retval An ErrorStatus enumeration value: |
| elmot | 1:d0dfbce63a89 | 211 | * - SUCCESS: USART registers are initialized according to USART_InitStruct content |
| elmot | 1:d0dfbce63a89 | 212 | * - ERROR: Problem occurred during USART Registers initialization |
| elmot | 1:d0dfbce63a89 | 213 | */ |
| elmot | 1:d0dfbce63a89 | 214 | ErrorStatus LL_USART_Init(USART_TypeDef *USARTx, LL_USART_InitTypeDef *USART_InitStruct) |
| elmot | 1:d0dfbce63a89 | 215 | { |
| elmot | 1:d0dfbce63a89 | 216 | ErrorStatus status = ERROR; |
| elmot | 1:d0dfbce63a89 | 217 | uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO; |
| elmot | 1:d0dfbce63a89 | 218 | |
| elmot | 1:d0dfbce63a89 | 219 | /* Check the parameters */ |
| elmot | 1:d0dfbce63a89 | 220 | assert_param(IS_UART_INSTANCE(USARTx)); |
| elmot | 1:d0dfbce63a89 | 221 | assert_param(IS_LL_USART_BAUDRATE(USART_InitStruct->BaudRate)); |
| elmot | 1:d0dfbce63a89 | 222 | assert_param(IS_LL_USART_DATAWIDTH(USART_InitStruct->DataWidth)); |
| elmot | 1:d0dfbce63a89 | 223 | assert_param(IS_LL_USART_STOPBITS(USART_InitStruct->StopBits)); |
| elmot | 1:d0dfbce63a89 | 224 | assert_param(IS_LL_USART_PARITY(USART_InitStruct->Parity)); |
| elmot | 1:d0dfbce63a89 | 225 | assert_param(IS_LL_USART_DIRECTION(USART_InitStruct->TransferDirection)); |
| elmot | 1:d0dfbce63a89 | 226 | assert_param(IS_LL_USART_HWCONTROL(USART_InitStruct->HardwareFlowControl)); |
| elmot | 1:d0dfbce63a89 | 227 | assert_param(IS_LL_USART_OVERSAMPLING(USART_InitStruct->OverSampling)); |
| elmot | 1:d0dfbce63a89 | 228 | |
| elmot | 1:d0dfbce63a89 | 229 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
| elmot | 1:d0dfbce63a89 | 230 | CRx registers */ |
| elmot | 1:d0dfbce63a89 | 231 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| elmot | 1:d0dfbce63a89 | 232 | { |
| elmot | 1:d0dfbce63a89 | 233 | /*---------------------------- USART CR1 Configuration ----------------------- |
| elmot | 1:d0dfbce63a89 | 234 | * Configure USARTx CR1 (USART Word Length, Parity, Mode and Oversampling bits) with parameters: |
| elmot | 1:d0dfbce63a89 | 235 | * - DataWidth: USART_CR1_M bits according to USART_InitStruct->DataWidth value |
| elmot | 1:d0dfbce63a89 | 236 | * - Parity: USART_CR1_PCE, USART_CR1_PS bits according to USART_InitStruct->Parity value |
| elmot | 1:d0dfbce63a89 | 237 | * - TransferDirection: USART_CR1_TE, USART_CR1_RE bits according to USART_InitStruct->TransferDirection value |
| elmot | 1:d0dfbce63a89 | 238 | * - Oversampling: USART_CR1_OVER8 bit according to USART_InitStruct->OverSampling value. |
| elmot | 1:d0dfbce63a89 | 239 | */ |
| elmot | 1:d0dfbce63a89 | 240 | MODIFY_REG(USARTx->CR1, |
| elmot | 1:d0dfbce63a89 | 241 | (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | |
| elmot | 1:d0dfbce63a89 | 242 | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8), |
| elmot | 1:d0dfbce63a89 | 243 | (USART_InitStruct->DataWidth | USART_InitStruct->Parity | |
| elmot | 1:d0dfbce63a89 | 244 | USART_InitStruct->TransferDirection | USART_InitStruct->OverSampling)); |
| elmot | 1:d0dfbce63a89 | 245 | |
| elmot | 1:d0dfbce63a89 | 246 | /*---------------------------- USART CR2 Configuration ----------------------- |
| elmot | 1:d0dfbce63a89 | 247 | * Configure USARTx CR2 (Stop bits) with parameters: |
| elmot | 1:d0dfbce63a89 | 248 | * - Stop Bits: USART_CR2_STOP bits according to USART_InitStruct->StopBits value. |
| elmot | 1:d0dfbce63a89 | 249 | * - CLKEN, CPOL, CPHA and LBCL bits are to be configured using LL_USART_ClockInit(). |
| elmot | 1:d0dfbce63a89 | 250 | */ |
| elmot | 1:d0dfbce63a89 | 251 | LL_USART_SetStopBitsLength(USARTx, USART_InitStruct->StopBits); |
| elmot | 1:d0dfbce63a89 | 252 | |
| elmot | 1:d0dfbce63a89 | 253 | /*---------------------------- USART CR3 Configuration ----------------------- |
| elmot | 1:d0dfbce63a89 | 254 | * Configure USARTx CR3 (Hardware Flow Control) with parameters: |
| elmot | 1:d0dfbce63a89 | 255 | * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to USART_InitStruct->HardwareFlowControl value. |
| elmot | 1:d0dfbce63a89 | 256 | */ |
| elmot | 1:d0dfbce63a89 | 257 | LL_USART_SetHWFlowCtrl(USARTx, USART_InitStruct->HardwareFlowControl); |
| elmot | 1:d0dfbce63a89 | 258 | |
| elmot | 1:d0dfbce63a89 | 259 | /*---------------------------- USART BRR Configuration ----------------------- |
| elmot | 1:d0dfbce63a89 | 260 | * Retrieve Clock frequency used for USART Peripheral |
| elmot | 1:d0dfbce63a89 | 261 | */ |
| elmot | 1:d0dfbce63a89 | 262 | if (USARTx == USART1) |
| elmot | 1:d0dfbce63a89 | 263 | { |
| elmot | 1:d0dfbce63a89 | 264 | periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART1_CLKSOURCE); |
| elmot | 1:d0dfbce63a89 | 265 | } |
| elmot | 1:d0dfbce63a89 | 266 | else if (USARTx == USART2) |
| elmot | 1:d0dfbce63a89 | 267 | { |
| elmot | 1:d0dfbce63a89 | 268 | periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART2_CLKSOURCE); |
| elmot | 1:d0dfbce63a89 | 269 | } |
| elmot | 1:d0dfbce63a89 | 270 | #if defined(USART3) |
| elmot | 1:d0dfbce63a89 | 271 | else if (USARTx == USART3) |
| elmot | 1:d0dfbce63a89 | 272 | { |
| elmot | 1:d0dfbce63a89 | 273 | periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART3_CLKSOURCE); |
| elmot | 1:d0dfbce63a89 | 274 | } |
| elmot | 1:d0dfbce63a89 | 275 | #endif /* USART3 */ |
| elmot | 1:d0dfbce63a89 | 276 | #if defined(UART4) |
| elmot | 1:d0dfbce63a89 | 277 | else if (USARTx == UART4) |
| elmot | 1:d0dfbce63a89 | 278 | { |
| elmot | 1:d0dfbce63a89 | 279 | periphclk = LL_RCC_GetUARTClockFreq(LL_RCC_UART4_CLKSOURCE); |
| elmot | 1:d0dfbce63a89 | 280 | } |
| elmot | 1:d0dfbce63a89 | 281 | #endif /* UART4 */ |
| elmot | 1:d0dfbce63a89 | 282 | #if defined(UART5) |
| elmot | 1:d0dfbce63a89 | 283 | else if (USARTx == UART5) |
| elmot | 1:d0dfbce63a89 | 284 | { |
| elmot | 1:d0dfbce63a89 | 285 | periphclk = LL_RCC_GetUARTClockFreq(LL_RCC_UART5_CLKSOURCE); |
| elmot | 1:d0dfbce63a89 | 286 | } |
| elmot | 1:d0dfbce63a89 | 287 | #endif /* UART5 */ |
| elmot | 1:d0dfbce63a89 | 288 | else |
| elmot | 1:d0dfbce63a89 | 289 | { |
| elmot | 1:d0dfbce63a89 | 290 | /* Nothing to do, as error code is already assigned to ERROR value */ |
| elmot | 1:d0dfbce63a89 | 291 | } |
| elmot | 1:d0dfbce63a89 | 292 | |
| elmot | 1:d0dfbce63a89 | 293 | /* Configure the USART Baud Rate : |
| elmot | 1:d0dfbce63a89 | 294 | - valid baud rate value (different from 0) is required |
| elmot | 1:d0dfbce63a89 | 295 | - Peripheral clock as returned by RCC service, should be valid (different from 0). |
| elmot | 1:d0dfbce63a89 | 296 | */ |
| elmot | 1:d0dfbce63a89 | 297 | if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO) |
| elmot | 1:d0dfbce63a89 | 298 | && (USART_InitStruct->BaudRate != 0U)) |
| elmot | 1:d0dfbce63a89 | 299 | { |
| elmot | 1:d0dfbce63a89 | 300 | status = SUCCESS; |
| elmot | 1:d0dfbce63a89 | 301 | LL_USART_SetBaudRate(USARTx, |
| elmot | 1:d0dfbce63a89 | 302 | periphclk, |
| elmot | 1:d0dfbce63a89 | 303 | USART_InitStruct->OverSampling, |
| elmot | 1:d0dfbce63a89 | 304 | USART_InitStruct->BaudRate); |
| elmot | 1:d0dfbce63a89 | 305 | } |
| elmot | 1:d0dfbce63a89 | 306 | } |
| elmot | 1:d0dfbce63a89 | 307 | /* Endif (=> USART not in Disabled state => return ERROR) */ |
| elmot | 1:d0dfbce63a89 | 308 | |
| elmot | 1:d0dfbce63a89 | 309 | return (status); |
| elmot | 1:d0dfbce63a89 | 310 | } |
| elmot | 1:d0dfbce63a89 | 311 | |
| elmot | 1:d0dfbce63a89 | 312 | /** |
| elmot | 1:d0dfbce63a89 | 313 | * @brief Set each @ref LL_USART_InitTypeDef field to default value. |
| elmot | 1:d0dfbce63a89 | 314 | * @param USART_InitStruct: pointer to a @ref LL_USART_InitTypeDef structure |
| elmot | 1:d0dfbce63a89 | 315 | * whose fields will be set to default values. |
| elmot | 1:d0dfbce63a89 | 316 | * @retval None |
| elmot | 1:d0dfbce63a89 | 317 | */ |
| elmot | 1:d0dfbce63a89 | 318 | |
| elmot | 1:d0dfbce63a89 | 319 | void LL_USART_StructInit(LL_USART_InitTypeDef *USART_InitStruct) |
| elmot | 1:d0dfbce63a89 | 320 | { |
| elmot | 1:d0dfbce63a89 | 321 | /* Set USART_InitStruct fields to default values */ |
| elmot | 1:d0dfbce63a89 | 322 | USART_InitStruct->BaudRate = 9600U; |
| elmot | 1:d0dfbce63a89 | 323 | USART_InitStruct->DataWidth = LL_USART_DATAWIDTH_8B; |
| elmot | 1:d0dfbce63a89 | 324 | USART_InitStruct->StopBits = LL_USART_STOPBITS_1; |
| elmot | 1:d0dfbce63a89 | 325 | USART_InitStruct->Parity = LL_USART_PARITY_NONE ; |
| elmot | 1:d0dfbce63a89 | 326 | USART_InitStruct->TransferDirection = LL_USART_DIRECTION_TX_RX; |
| elmot | 1:d0dfbce63a89 | 327 | USART_InitStruct->HardwareFlowControl = LL_USART_HWCONTROL_NONE; |
| elmot | 1:d0dfbce63a89 | 328 | USART_InitStruct->OverSampling = LL_USART_OVERSAMPLING_16; |
| elmot | 1:d0dfbce63a89 | 329 | } |
| elmot | 1:d0dfbce63a89 | 330 | |
| elmot | 1:d0dfbce63a89 | 331 | /** |
| elmot | 1:d0dfbce63a89 | 332 | * @brief Initialize USART Clock related settings according to the |
| elmot | 1:d0dfbce63a89 | 333 | * specified parameters in the USART_ClockInitStruct. |
| elmot | 1:d0dfbce63a89 | 334 | * @note As some bits in USART configuration registers can only be written when the USART is disabled (USART_CR1_UE bit =0), |
| elmot | 1:d0dfbce63a89 | 335 | * USART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
| elmot | 1:d0dfbce63a89 | 336 | * @param USARTx USART Instance |
| elmot | 1:d0dfbce63a89 | 337 | * @param USART_ClockInitStruct: pointer to a @ref LL_USART_ClockInitTypeDef structure |
| elmot | 1:d0dfbce63a89 | 338 | * that contains the Clock configuration information for the specified USART peripheral. |
| elmot | 1:d0dfbce63a89 | 339 | * @retval An ErrorStatus enumeration value: |
| elmot | 1:d0dfbce63a89 | 340 | * - SUCCESS: USART registers related to Clock settings are initialized according to USART_ClockInitStruct content |
| elmot | 1:d0dfbce63a89 | 341 | * - ERROR: Problem occurred during USART Registers initialization |
| elmot | 1:d0dfbce63a89 | 342 | */ |
| elmot | 1:d0dfbce63a89 | 343 | ErrorStatus LL_USART_ClockInit(USART_TypeDef *USARTx, LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| elmot | 1:d0dfbce63a89 | 344 | { |
| elmot | 1:d0dfbce63a89 | 345 | ErrorStatus status = SUCCESS; |
| elmot | 1:d0dfbce63a89 | 346 | |
| elmot | 1:d0dfbce63a89 | 347 | /* Check USART Instance and Clock signal output parameters */ |
| elmot | 1:d0dfbce63a89 | 348 | assert_param(IS_UART_INSTANCE(USARTx)); |
| elmot | 1:d0dfbce63a89 | 349 | assert_param(IS_LL_USART_CLOCKOUTPUT(USART_ClockInitStruct->ClockOutput)); |
| elmot | 1:d0dfbce63a89 | 350 | |
| elmot | 1:d0dfbce63a89 | 351 | /* USART needs to be in disabled state, in order to be able to configure some bits in |
| elmot | 1:d0dfbce63a89 | 352 | CRx registers */ |
| elmot | 1:d0dfbce63a89 | 353 | if (LL_USART_IsEnabled(USARTx) == 0U) |
| elmot | 1:d0dfbce63a89 | 354 | { |
| elmot | 1:d0dfbce63a89 | 355 | /*---------------------------- USART CR2 Configuration -----------------------*/ |
| elmot | 1:d0dfbce63a89 | 356 | /* If Clock signal has to be output */ |
| elmot | 1:d0dfbce63a89 | 357 | if (USART_ClockInitStruct->ClockOutput == LL_USART_CLOCK_DISABLE) |
| elmot | 1:d0dfbce63a89 | 358 | { |
| elmot | 1:d0dfbce63a89 | 359 | /* Deactivate Clock signal delivery : |
| elmot | 1:d0dfbce63a89 | 360 | * - Disable Clock Output: USART_CR2_CLKEN cleared |
| elmot | 1:d0dfbce63a89 | 361 | */ |
| elmot | 1:d0dfbce63a89 | 362 | LL_USART_DisableSCLKOutput(USARTx); |
| elmot | 1:d0dfbce63a89 | 363 | } |
| elmot | 1:d0dfbce63a89 | 364 | else |
| elmot | 1:d0dfbce63a89 | 365 | { |
| elmot | 1:d0dfbce63a89 | 366 | /* Ensure USART instance is USART capable */ |
| elmot | 1:d0dfbce63a89 | 367 | assert_param(IS_USART_INSTANCE(USARTx)); |
| elmot | 1:d0dfbce63a89 | 368 | |
| elmot | 1:d0dfbce63a89 | 369 | /* Check clock related parameters */ |
| elmot | 1:d0dfbce63a89 | 370 | assert_param(IS_LL_USART_CLOCKPOLARITY(USART_ClockInitStruct->ClockPolarity)); |
| elmot | 1:d0dfbce63a89 | 371 | assert_param(IS_LL_USART_CLOCKPHASE(USART_ClockInitStruct->ClockPhase)); |
| elmot | 1:d0dfbce63a89 | 372 | assert_param(IS_LL_USART_LASTBITCLKOUTPUT(USART_ClockInitStruct->LastBitClockPulse)); |
| elmot | 1:d0dfbce63a89 | 373 | |
| elmot | 1:d0dfbce63a89 | 374 | /*---------------------------- USART CR2 Configuration ----------------------- |
| elmot | 1:d0dfbce63a89 | 375 | * Configure USARTx CR2 (Clock signal related bits) with parameters: |
| elmot | 1:d0dfbce63a89 | 376 | * - Enable Clock Output: USART_CR2_CLKEN set |
| elmot | 1:d0dfbce63a89 | 377 | * - Clock Polarity: USART_CR2_CPOL bit according to USART_ClockInitStruct->ClockPolarity value |
| elmot | 1:d0dfbce63a89 | 378 | * - Clock Phase: USART_CR2_CPHA bit according to USART_ClockInitStruct->ClockPhase value |
| elmot | 1:d0dfbce63a89 | 379 | * - Last Bit Clock Pulse Output: USART_CR2_LBCL bit according to USART_ClockInitStruct->LastBitClockPulse value. |
| elmot | 1:d0dfbce63a89 | 380 | */ |
| elmot | 1:d0dfbce63a89 | 381 | MODIFY_REG(USARTx->CR2, |
| elmot | 1:d0dfbce63a89 | 382 | USART_CR2_CLKEN | USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_LBCL, |
| elmot | 1:d0dfbce63a89 | 383 | USART_CR2_CLKEN | USART_ClockInitStruct->ClockPolarity | |
| elmot | 1:d0dfbce63a89 | 384 | USART_ClockInitStruct->ClockPhase | USART_ClockInitStruct->LastBitClockPulse); |
| elmot | 1:d0dfbce63a89 | 385 | } |
| elmot | 1:d0dfbce63a89 | 386 | } |
| elmot | 1:d0dfbce63a89 | 387 | /* Else (USART not in Disabled state => return ERROR */ |
| elmot | 1:d0dfbce63a89 | 388 | else |
| elmot | 1:d0dfbce63a89 | 389 | { |
| elmot | 1:d0dfbce63a89 | 390 | status = ERROR; |
| elmot | 1:d0dfbce63a89 | 391 | } |
| elmot | 1:d0dfbce63a89 | 392 | |
| elmot | 1:d0dfbce63a89 | 393 | return (status); |
| elmot | 1:d0dfbce63a89 | 394 | } |
| elmot | 1:d0dfbce63a89 | 395 | |
| elmot | 1:d0dfbce63a89 | 396 | /** |
| elmot | 1:d0dfbce63a89 | 397 | * @brief Set each field of a @ref LL_USART_ClockInitTypeDef type structure to default value. |
| elmot | 1:d0dfbce63a89 | 398 | * @param USART_ClockInitStruct: pointer to a @ref LL_USART_ClockInitTypeDef structure |
| elmot | 1:d0dfbce63a89 | 399 | * whose fields will be set to default values. |
| elmot | 1:d0dfbce63a89 | 400 | * @retval None |
| elmot | 1:d0dfbce63a89 | 401 | */ |
| elmot | 1:d0dfbce63a89 | 402 | void LL_USART_ClockStructInit(LL_USART_ClockInitTypeDef *USART_ClockInitStruct) |
| elmot | 1:d0dfbce63a89 | 403 | { |
| elmot | 1:d0dfbce63a89 | 404 | /* Set LL_USART_ClockInitStruct fields with default values */ |
| elmot | 1:d0dfbce63a89 | 405 | USART_ClockInitStruct->ClockOutput = LL_USART_CLOCK_DISABLE; |
| elmot | 1:d0dfbce63a89 | 406 | USART_ClockInitStruct->ClockPolarity = LL_USART_POLARITY_LOW; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| elmot | 1:d0dfbce63a89 | 407 | USART_ClockInitStruct->ClockPhase = LL_USART_PHASE_1EDGE; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| elmot | 1:d0dfbce63a89 | 408 | USART_ClockInitStruct->LastBitClockPulse = LL_USART_LASTCLKPULSE_NO_OUTPUT; /* Not relevant when ClockOutput = LL_USART_CLOCK_DISABLE */ |
| elmot | 1:d0dfbce63a89 | 409 | } |
| elmot | 1:d0dfbce63a89 | 410 | |
| elmot | 1:d0dfbce63a89 | 411 | /** |
| elmot | 1:d0dfbce63a89 | 412 | * @} |
| elmot | 1:d0dfbce63a89 | 413 | */ |
| elmot | 1:d0dfbce63a89 | 414 | |
| elmot | 1:d0dfbce63a89 | 415 | /** |
| elmot | 1:d0dfbce63a89 | 416 | * @} |
| elmot | 1:d0dfbce63a89 | 417 | */ |
| elmot | 1:d0dfbce63a89 | 418 | |
| elmot | 1:d0dfbce63a89 | 419 | /** |
| elmot | 1:d0dfbce63a89 | 420 | * @} |
| elmot | 1:d0dfbce63a89 | 421 | */ |
| elmot | 1:d0dfbce63a89 | 422 | |
| elmot | 1:d0dfbce63a89 | 423 | #endif /* USART1 || USART2 || USART3 || UART4 || UART5 */ |
| elmot | 1:d0dfbce63a89 | 424 | |
| elmot | 1:d0dfbce63a89 | 425 | /** |
| elmot | 1:d0dfbce63a89 | 426 | * @} |
| elmot | 1:d0dfbce63a89 | 427 | */ |
| elmot | 1:d0dfbce63a89 | 428 | |
| elmot | 1:d0dfbce63a89 | 429 | #endif /* USE_FULL_LL_DRIVER */ |
| elmot | 1:d0dfbce63a89 | 430 | |
| elmot | 1:d0dfbce63a89 | 431 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
| elmot | 1:d0dfbce63a89 | 432 |