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| bfc108 | 1 | /** |
| Q | 2 | ****************************************************************************** |
| 3 | * @file stm32f0xx_ll_i2c.c | |
| 4 | * @author MCD Application Team | |
| 5 | * @brief I2C LL module driver. | |
| 6 | ****************************************************************************** | |
| 7 | * @attention | |
| 8 | * | |
| 9 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
| 10 | * | |
| 11 | * Redistribution and use in source and binary forms, with or without modification, | |
| 12 | * are permitted provided that the following conditions are met: | |
| 13 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 14 | * this list of conditions and the following disclaimer. | |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 16 | * this list of conditions and the following disclaimer in the documentation | |
| 17 | * and/or other materials provided with the distribution. | |
| 18 | * 3. Neither the name of STMicroelectronics nor the names of its contributors | |
| 19 | * may be used to endorse or promote products derived from this software | |
| 20 | * without specific prior written permission. | |
| 21 | * | |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 25 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 28 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 29 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 | * | |
| 33 | ****************************************************************************** | |
| 34 | */ | |
| 35 | #if defined(USE_FULL_LL_DRIVER) | |
| 36 | ||
| 37 | /* Includes ------------------------------------------------------------------*/ | |
| 38 | #include "stm32f0xx_ll_i2c.h" | |
| 39 | #include "stm32f0xx_ll_bus.h" | |
| 40 | #ifdef USE_FULL_ASSERT | |
| 41 | #include "stm32_assert.h" | |
| 42 | #else | |
| 43 | #define assert_param(expr) ((void)0U) | |
| 44 | #endif | |
| 45 | ||
| 46 | /** @addtogroup STM32F0xx_LL_Driver | |
| 47 | * @{ | |
| 48 | */ | |
| 49 | ||
| 50 | #if defined (I2C1) || defined (I2C2) | |
| 51 | ||
| 52 | /** @defgroup I2C_LL I2C | |
| 53 | * @{ | |
| 54 | */ | |
| 55 | ||
| 56 | /* Private types -------------------------------------------------------------*/ | |
| 57 | /* Private variables ---------------------------------------------------------*/ | |
| 58 | /* Private constants ---------------------------------------------------------*/ | |
| 59 | /* Private macros ------------------------------------------------------------*/ | |
| 60 | /** @addtogroup I2C_LL_Private_Macros | |
| 61 | * @{ | |
| 62 | */ | |
| 63 | ||
| 64 | #define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \ | |
| 65 | ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \ | |
| 66 | ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \ | |
| 67 | ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP)) | |
| 68 | ||
| 69 | #define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \ | |
| 70 | ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE)) | |
| 71 | ||
| 72 | #define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU) | |
| 73 | ||
| 74 | #define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU) | |
| 75 | ||
| 76 | #define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \ | |
| 77 | ((__VALUE__) == LL_I2C_NACK)) | |
| 78 | ||
| 79 | #define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \ | |
| 80 | ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT)) | |
| 81 | /** | |
| 82 | * @} | |
| 83 | */ | |
| 84 | ||
| 85 | /* Private function prototypes -----------------------------------------------*/ | |
| 86 | ||
| 87 | /* Exported functions --------------------------------------------------------*/ | |
| 88 | /** @addtogroup I2C_LL_Exported_Functions | |
| 89 | * @{ | |
| 90 | */ | |
| 91 | ||
| 92 | /** @addtogroup I2C_LL_EF_Init | |
| 93 | * @{ | |
| 94 | */ | |
| 95 | ||
| 96 | /** | |
| 97 | * @brief De-initialize the I2C registers to their default reset values. | |
| 98 | * @param I2Cx I2C Instance. | |
| 99 | * @retval An ErrorStatus enumeration value: | |
| 100 | * - SUCCESS: I2C registers are de-initialized | |
| 101 | * - ERROR: I2C registers are not de-initialized | |
| 102 | */ | |
| 103 | uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx) | |
| 104 | { | |
| 105 | ErrorStatus status = SUCCESS; | |
| 106 | ||
| 107 | /* Check the I2C Instance I2Cx */ | |
| 108 | assert_param(IS_I2C_ALL_INSTANCE(I2Cx)); | |
| 109 | ||
| 110 | if (I2Cx == I2C1) | |
| 111 | { | |
| 112 | /* Force reset of I2C clock */ | |
| 113 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1); | |
| 114 | ||
| 115 | /* Release reset of I2C clock */ | |
| 116 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1); | |
| 117 | } | |
| 118 | #if defined(I2C2) | |
| 119 | else if (I2Cx == I2C2) | |
| 120 | { | |
| 121 | /* Force reset of I2C clock */ | |
| 122 | LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2); | |
| 123 | ||
| 124 | /* Release reset of I2C clock */ | |
| 125 | LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2); | |
| 126 | ||
| 127 | } | |
| 128 | #endif | |
| 129 | else | |
| 130 | { | |
| 131 | status = ERROR; | |
| 132 | } | |
| 133 | ||
| 134 | return status; | |
| 135 | } | |
| 136 | ||
| 137 | /** | |
| 138 | * @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct. | |
| 139 | * @param I2Cx I2C Instance. | |
| 140 | * @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure. | |
| 141 | * @retval An ErrorStatus enumeration value: | |
| 142 | * - SUCCESS: I2C registers are initialized | |
| 143 | * - ERROR: Not applicable | |
| 144 | */ | |
| 145 | uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct) | |
| 146 | { | |
| 147 | /* Check the I2C Instance I2Cx */ | |
| 148 | assert_param(IS_I2C_ALL_INSTANCE(I2Cx)); | |
| 149 | ||
| 150 | /* Check the I2C parameters from I2C_InitStruct */ | |
| 151 | assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode)); | |
| 152 | assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter)); | |
| 153 | assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter)); | |
| 154 | assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1)); | |
| 155 | assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge)); | |
| 156 | assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize)); | |
| 157 | ||
| 158 | /* Disable the selected I2Cx Peripheral */ | |
| 159 | LL_I2C_Disable(I2Cx); | |
| 160 | ||
| 161 | /*---------------------------- I2Cx CR1 Configuration ------------------------ | |
| 162 | * Configure the analog and digital noise filters with parameters : | |
| 163 | * - AnalogFilter: I2C_CR1_ANFOFF bit | |
| 164 | * - DigitalFilter: I2C_CR1_DNF[3:0] bits | |
| 165 | */ | |
| 166 | LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter); | |
| 167 | ||
| 168 | /*---------------------------- I2Cx TIMINGR Configuration -------------------- | |
| 169 | * Configure the SDA setup, hold time and the SCL high, low period with parameter : | |
| 170 | * - Timing: I2C_TIMINGR_PRESC[3:0], I2C_TIMINGR_SCLDEL[3:0], I2C_TIMINGR_SDADEL[3:0], | |
| 171 | * I2C_TIMINGR_SCLH[7:0] and I2C_TIMINGR_SCLL[7:0] bits | |
| 172 | */ | |
| 173 | LL_I2C_SetTiming(I2Cx, I2C_InitStruct->Timing); | |
| 174 | ||
| 175 | /* Enable the selected I2Cx Peripheral */ | |
| 176 | LL_I2C_Enable(I2Cx); | |
| 177 | ||
| 178 | /*---------------------------- I2Cx OAR1 Configuration ----------------------- | |
| 179 | * Disable, Configure and Enable I2Cx device own address 1 with parameters : | |
| 180 | * - OwnAddress1: I2C_OAR1_OA1[9:0] bits | |
| 181 | * - OwnAddrSize: I2C_OAR1_OA1MODE bit | |
| 182 | */ | |
| 183 | LL_I2C_DisableOwnAddress1(I2Cx); | |
| 184 | LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize); | |
| 185 | ||
| 186 | /* OwnAdress1 == 0 is reserved for General Call address */ | |
| 187 | if (I2C_InitStruct->OwnAddress1 != 0U) | |
| 188 | { | |
| 189 | LL_I2C_EnableOwnAddress1(I2Cx); | |
| 190 | } | |
| 191 | ||
| 192 | /*---------------------------- I2Cx MODE Configuration ----------------------- | |
| 193 | * Configure I2Cx peripheral mode with parameter : | |
| 194 | * - PeripheralMode: I2C_CR1_SMBDEN and I2C_CR1_SMBHEN bits | |
| 195 | */ | |
| 196 | LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode); | |
| 197 | ||
| 198 | /*---------------------------- I2Cx CR2 Configuration ------------------------ | |
| 199 | * Configure the ACKnowledge or Non ACKnowledge condition | |
| 200 | * after the address receive match code or next received byte with parameter : | |
| 201 | * - TypeAcknowledge: I2C_CR2_NACK bit | |
| 202 | */ | |
| 203 | LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge); | |
| 204 | ||
| 205 | return SUCCESS; | |
| 206 | } | |
| 207 | ||
| 208 | /** | |
| 209 | * @brief Set each @ref LL_I2C_InitTypeDef field to default value. | |
| 210 | * @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure. | |
| 211 | * @retval None | |
| 212 | */ | |
| 213 | void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct) | |
| 214 | { | |
| 215 | /* Set I2C_InitStruct fields to default values */ | |
| 216 | I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C; | |
| 217 | I2C_InitStruct->Timing = 0U; | |
| 218 | I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE; | |
| 219 | I2C_InitStruct->DigitalFilter = 0U; | |
| 220 | I2C_InitStruct->OwnAddress1 = 0U; | |
| 221 | I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK; | |
| 222 | I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT; | |
| 223 | } | |
| 224 | ||
| 225 | /** | |
| 226 | * @} | |
| 227 | */ | |
| 228 | ||
| 229 | /** | |
| 230 | * @} | |
| 231 | */ | |
| 232 | ||
| 233 | /** | |
| 234 | * @} | |
| 235 | */ | |
| 236 | ||
| 237 | #endif /* I2C1 || I2C2 */ | |
| 238 | ||
| 239 | /** | |
| 240 | * @} | |
| 241 | */ | |
| 242 | ||
| 243 | #endif /* USE_FULL_LL_DRIVER */ | |
| 244 | ||
| 245 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ | |
