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Implement a secure ICS protocol targeting LoRa Node151 microcontroller for controlling irrigation.
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lora-irrigation/loramac/src/boards/mcu/stm32/STM32L1xx_HAL_Driver/Src/stm32l1xx_ll_i2c.c

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  1. /**

  2.   ******************************************************************************

  3.   * @file    stm32l1xx_ll_i2c.c

  4.   * @author  MCD Application Team

  5.   * @brief   I2C LL module driver.

  6.   ******************************************************************************

  7.   * @attention

  8.   *

  9.   * <h2><center>&copy; COPYRIGHT(c) 2017 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 "stm32l1xx_ll_i2c.h"

  39. #include "stm32l1xx_ll_bus.h"

  40. #include "stm32l1xx_ll_rcc.h"

  41. #ifdef  USE_FULL_ASSERT

  42. #include "stm32_assert.h"

  43. #else

  44. #define assert_param(expr) ((void)0U)

  45. #endif

  46. 

  47. /** @addtogroup STM32L1xx_LL_Driver

  48.   * @{

  49.   */

  50. 

  51. #if defined (I2C1) || defined (I2C2)

  52. 

  53. /** @defgroup I2C_LL I2C

  54.   * @{

  55.   */

  56. 

  57. /* Private types -------------------------------------------------------------*/

  58. /* Private variables ---------------------------------------------------------*/

  59. /* Private constants ---------------------------------------------------------*/

  60. /* Private macros ------------------------------------------------------------*/

  61. /** @addtogroup I2C_LL_Private_Macros

  62.   * @{

  63.   */

  64. 

  65. #define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__)    (((__VALUE__) == LL_I2C_MODE_I2C)          || \

  66.                                                  ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST)   || \

  67.                                                  ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \

  68.                                                  ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))

  69. 

  70. #define IS_I2C_CLOCK_SPEED(__VALUE__)           (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST))

  71. 

  72. #define IS_I2C_DUTY_CYCLE(__VALUE__)            (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \

  73.                                                  ((__VALUE__) == LL_I2C_DUTYCYCLE_16_9))

  74. 

  75. #define IS_LL_I2C_OWN_ADDRESS1(__VALUE__)       ((__VALUE__) <= 0x000003FFU)

  76. 

  77. #define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__)   (((__VALUE__) == LL_I2C_ACK) || \

  78.                                                  ((__VALUE__) == LL_I2C_NACK))

  79. 

  80. #define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__)       (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \

  81.                                                  ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))

  82. /**

  83.   * @}

  84.   */

  85. 

  86. /* Private function prototypes -----------------------------------------------*/

  87. 

  88. /* Exported functions --------------------------------------------------------*/

  89. /** @addtogroup I2C_LL_Exported_Functions

  90.   * @{

  91.   */

  92. 

  93. /** @addtogroup I2C_LL_EF_Init

  94.   * @{

  95.   */

  96. 

  97. /**

  98.   * @brief  De-initialize the I2C registers to their default reset values.

  99.   * @param  I2Cx I2C Instance.

  100.   * @retval An ErrorStatus enumeration value:

  101.   *          - SUCCESS: I2C registers are de-initialized

  102.   *          - ERROR: I2C registers are not de-initialized

  103.   */

  104. uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx)

  105. {

  106.   ErrorStatus status = SUCCESS;

  107. 

  108.   /* Check the I2C Instance I2Cx */

  109.   assert_param(IS_I2C_ALL_INSTANCE(I2Cx));

  110. 

  111.   if (I2Cx == I2C1)

  112.   {

  113.     /* Force reset of I2C clock */

  114.     LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);

  115. 

  116.     /* Release reset of I2C clock */

  117.     LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);

  118.   }

  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.   else

  129.   {

  130.     status = ERROR;

  131.   }

  132. 

  133.   return status;

  134. }

  135. 

  136. /**

  137.   * @brief  Initialize the I2C registers according to the specified parameters in I2C_InitStruct.

  138.   * @param  I2Cx I2C Instance.

  139.   * @param  I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.

  140.   * @retval An ErrorStatus enumeration value:

  141.   *          - SUCCESS: I2C registers are initialized

  142.   *          - ERROR: Not applicable

  143.   */

  144. uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)

  145. {

  146.   LL_RCC_ClocksTypeDef rcc_clocks;

  147. 

  148.   /* Check the I2C Instance I2Cx */

  149.   assert_param(IS_I2C_ALL_INSTANCE(I2Cx));

  150. 

  151.   /* Check the I2C parameters from I2C_InitStruct */

  152.   assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));

  153.   assert_param(IS_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed));

  154.   assert_param(IS_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle));

  155.   assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));

  156.   assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));

  157.   assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));

  158. 

  159.   /* Disable the selected I2Cx Peripheral */

  160.   LL_I2C_Disable(I2Cx);

  161. 

  162.   /* Retrieve Clock frequencies */

  163.   LL_RCC_GetSystemClocksFreq(&rcc_clocks);

  164. 

  165.   /*---------------------------- I2Cx SCL Clock Speed Configuration ------------

  166.    * Configure the SCL speed :

  167.    * - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS,

  168.    *           and I2C_CCR_CCR[11:0] bits

  169.    * - DutyCycle: I2C_CCR_DUTY[7:0] bits

  170.    */

  171.   LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle);

  172. 

  173.   /*---------------------------- I2Cx OAR1 Configuration -----------------------

  174.    * Disable, Configure and Enable I2Cx device own address 1 with parameters :

  175.    * - OwnAddress1:  I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits

  176.    * - OwnAddrSize:  I2C_OAR1_ADDMODE bit

  177.    */

  178.   LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);

  179. 

  180.   /*---------------------------- I2Cx MODE Configuration -----------------------

  181.   * Configure I2Cx peripheral mode with parameter :

  182.    * - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits

  183.    */

  184.   LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);

  185. 

  186.   /* Enable the selected I2Cx Peripheral */

  187.   LL_I2C_Enable(I2Cx);

  188. 

  189.   /*---------------------------- I2Cx CR2 Configuration ------------------------

  190.    * Configure the ACKnowledge or Non ACKnowledge condition

  191.    * after the address receive match code or next received byte with parameter :

  192.    * - TypeAcknowledge: I2C_CR2_NACK bit

  193.    */

  194.   LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);

  195. 

  196.   return SUCCESS;

  197. }

  198. 

  199. /**

  200.   * @brief  Set each @ref LL_I2C_InitTypeDef field to default value.

  201.   * @param  I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.

  202.   * @retval None

  203.   */

  204. void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)

  205. {

  206.   /* Set I2C_InitStruct fields to default values */

  207.   I2C_InitStruct->PeripheralMode  = LL_I2C_MODE_I2C;

  208.   I2C_InitStruct->ClockSpeed      = 5000U;

  209.   I2C_InitStruct->DutyCycle       = LL_I2C_DUTYCYCLE_2;

  210.   I2C_InitStruct->OwnAddress1     = 0U;

  211.   I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;

  212.   I2C_InitStruct->OwnAddrSize     = LL_I2C_OWNADDRESS1_7BIT;

  213. }

  214. 

  215. /**

  216.   * @}

  217.   */

  218. 

  219. /**

  220.   * @}

  221.   */

  222. 

  223. /**

  224.   * @}

  225.   */

  226. 

  227. #endif /* I2C1 || I2C2 */

  228. 

  229. /**

  230.   * @}

  231.   */

  232. 

  233. #endif /* USE_FULL_LL_DRIVER */

  234. 

  235. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/