Diff: HAL_L476/stm32l4xx_ll_lpuart.c

Revision:

1:d0dfbce63a89

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HAL_L476/stm32l4xx_ll_lpuart.c	Fri Feb 24 21:13:56 2017 +0000
@@ -0,0 +1,259 @@
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_ll_lpuart.c
+  * @author  MCD Application Team
+  * @version V1.5.1
+  * @date    31-May-2016
+  * @brief   LPUART LL module driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+#if defined(USE_FULL_LL_DRIVER)
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_ll_lpuart.h"
+#include "stm32l4xx_ll_rcc.h"
+#include "stm32l4xx_ll_bus.h"
+#ifdef  USE_FULL_ASSERT
+#include "stm32_assert.h"
+#else
+#define assert_param(expr) ((void)0U)
+#endif
+
+/** @addtogroup STM32L4xx_LL_Driver
+  * @{
+  */
+
+#if defined (LPUART1)
+
+/** @addtogroup LPUART_LL
+  * @{
+  */
+
+/* Private types -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/** @addtogroup LPUART_LL_Private_Constants
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+
+/* Private macros ------------------------------------------------------------*/
+/** @addtogroup LPUART_LL_Private_Macros
+  * @{
+  */
+
+/* Check of parameters for configuration of LPUART registers                  */
+
+/* __BAUDRATE__ Depending on constraints applicable for LPUART BRR register   */
+/*              value :                                                       */
+/*                - fck must be in the range [3 x baudrate, 4096 x baudrate]  */
+/*                - LPUART_BRR register value should be >= 0x300              */
+/*                - LPUART_BRR register value should be <= 0xFFFFF (20 bits)  */
+/*              Baudrate specified by the user should belong to [8, 26000000].*/
+#define IS_LL_LPUART_BAUDRATE(__BAUDRATE__) (((__BAUDRATE__) <= 26000000U) && ((__BAUDRATE__) >= 8U))
+
+#define IS_LL_LPUART_DIRECTION(__VALUE__) (((__VALUE__) == LL_LPUART_DIRECTION_NONE) \
+                                        || ((__VALUE__) == LL_LPUART_DIRECTION_RX) \
+                                        || ((__VALUE__) == LL_LPUART_DIRECTION_TX) \
+                                        || ((__VALUE__) == LL_LPUART_DIRECTION_TX_RX))
+
+#define IS_LL_LPUART_PARITY(__VALUE__) (((__VALUE__) == LL_LPUART_PARITY_NONE) \
+                                     || ((__VALUE__) == LL_LPUART_PARITY_EVEN) \
+                                     || ((__VALUE__) == LL_LPUART_PARITY_ODD))
+
+#define IS_LL_LPUART_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_LPUART_DATAWIDTH_7B) \
+                                        || ((__VALUE__) == LL_LPUART_DATAWIDTH_8B) \
+                                        || ((__VALUE__) == LL_LPUART_DATAWIDTH_9B))
+
+#define IS_LL_LPUART_STOPBITS(__VALUE__) (((__VALUE__) == LL_LPUART_STOPBITS_1) \
+                                       || ((__VALUE__) == LL_LPUART_STOPBITS_2))
+
+#define IS_LL_LPUART_HWCONTROL(__VALUE__) (((__VALUE__) == LL_LPUART_HWCONTROL_NONE) \
+                                       || ((__VALUE__) == LL_LPUART_HWCONTROL_RTS) \
+                                       || ((__VALUE__) == LL_LPUART_HWCONTROL_CTS) \
+                                       || ((__VALUE__) == LL_LPUART_HWCONTROL_RTS_CTS))
+
+/**
+  * @}
+  */
+
+/* Private function prototypes -----------------------------------------------*/
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup LPUART_LL_Exported_Functions
+  * @{
+  */
+
+/** @addtogroup LPUART_LL_EF_Init
+  * @{
+  */
+
+/**
+  * @brief  De-initialize LPUART registers (Registers restored to their default values).
+  * @param  LPUARTx LPUART Instance
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: LPUART registers are de-initialized
+  *          - ERROR: not applicable
+  */
+ErrorStatus LL_LPUART_DeInit(USART_TypeDef *LPUARTx)
+{
+  ErrorStatus status = SUCCESS;
+
+  /* Check the parameters */
+  assert_param(IS_LPUART_INSTANCE(LPUARTx));
+
+  /* Force reset of LPUART peripheral */
+  LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_LPUART1);
+
+  /* Release reset of LPUART peripheral */
+  LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_LPUART1);
+
+  return (status);
+}
+
+/**
+  * @brief  Initialize LPUART registers according to the specified
+  *         parameters in LPUART_InitStruct.
+  * @note   As some bits in LPUART configuration registers can only be written when the LPUART is disabled (USART_CR1_UE bit =0),
+  *         LPUART IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned.
+  * @note   Baud rate value stored in LPUART_InitStruct BaudRate field, should be valid (different from 0).
+  * @param  LPUARTx LPUART Instance
+  * @param  LPUART_InitStruct pointer to a @ref LL_LPUART_InitTypeDef structure
+  *         that contains the configuration information for the specified LPUART peripheral.
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: LPUART registers are initialized according to LPUART_InitStruct content
+  *          - ERROR: Problem occurred during LPUART Registers initialization
+  */
+ErrorStatus LL_LPUART_Init(USART_TypeDef *LPUARTx, LL_LPUART_InitTypeDef *LPUART_InitStruct)
+{
+  ErrorStatus status = ERROR;
+  uint32_t periphclk = LL_RCC_PERIPH_FREQUENCY_NO;
+
+  /* Check the parameters */
+  assert_param(IS_LPUART_INSTANCE(LPUARTx));
+  assert_param(IS_LL_LPUART_BAUDRATE(LPUART_InitStruct->BaudRate));
+  assert_param(IS_LL_LPUART_DATAWIDTH(LPUART_InitStruct->DataWidth));
+  assert_param(IS_LL_LPUART_STOPBITS(LPUART_InitStruct->StopBits));
+  assert_param(IS_LL_LPUART_PARITY(LPUART_InitStruct->Parity));
+  assert_param(IS_LL_LPUART_DIRECTION(LPUART_InitStruct->TransferDirection));
+  assert_param(IS_LL_LPUART_HWCONTROL(LPUART_InitStruct->HardwareFlowControl));
+
+  /* LPUART needs to be in disabled state, in order to be able to configure some bits in
+     CRx registers. Otherwise (LPUART not in Disabled state) => return ERROR */
+  if (LL_LPUART_IsEnabled(LPUARTx) == 0U)
+  {
+    /*---------------------------- LPUART CR1 Configuration -----------------------
+     * Configure LPUARTx CR1 (LPUART Word Length, Parity and Transfer Direction bits) with parameters:
+     * - DataWidth:          USART_CR1_M bits according to LPUART_InitStruct->DataWidth value
+     * - Parity:             USART_CR1_PCE, USART_CR1_PS bits according to LPUART_InitStruct->Parity value
+     * - TransferDirection:  USART_CR1_TE, USART_CR1_RE bits according to LPUART_InitStruct->TransferDirection value
+     */
+    MODIFY_REG(LPUARTx->CR1,
+               (USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE),
+               (LPUART_InitStruct->DataWidth | LPUART_InitStruct->Parity | LPUART_InitStruct->TransferDirection));
+
+    /*---------------------------- LPUART CR2 Configuration -----------------------
+     * Configure LPUARTx CR2 (Stop bits) with parameters:
+     * - Stop Bits:          USART_CR2_STOP bits according to LPUART_InitStruct->StopBits value.
+     */
+    LL_LPUART_SetStopBitsLength(LPUARTx, LPUART_InitStruct->StopBits);
+
+    /*---------------------------- LPUART CR3 Configuration -----------------------
+     * Configure LPUARTx CR3 (Hardware Flow Control) with parameters:
+     * - HardwareFlowControl: USART_CR3_RTSE, USART_CR3_CTSE bits according to LPUART_InitStruct->HardwareFlowControl value.
+     */
+    LL_LPUART_SetHWFlowCtrl(LPUARTx, LPUART_InitStruct->HardwareFlowControl);
+
+    /*---------------------------- LPUART BRR Configuration -----------------------
+     * Retrieve Clock frequency used for LPUART Peripheral
+     */
+    periphclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_LPUART1_CLKSOURCE);
+
+    /* Configure the LPUART Baud Rate :
+       - valid baud rate value (different from 0) is required
+       - Peripheral clock as returned by RCC service, should be valid (different from 0).
+    */
+    if ((periphclk != LL_RCC_PERIPH_FREQUENCY_NO)
+        && (LPUART_InitStruct->BaudRate != 0U))
+    {
+      status = SUCCESS;
+      LL_LPUART_SetBaudRate(LPUARTx,
+                            periphclk,
+                            LPUART_InitStruct->BaudRate);
+    }
+  }
+
+  return (status);
+}
+
+/**
+  * @brief Set each @ref LL_LPUART_InitTypeDef field to default value.
+  * @param LPUART_InitStruct pointer to a @ref LL_LPUART_InitTypeDef structure
+  *                          whose fields will be set to default values.
+  * @retval None
+  */
+
+void LL_LPUART_StructInit(LL_LPUART_InitTypeDef *LPUART_InitStruct)
+{
+  /* Set LPUART_InitStruct fields to default values */
+  LPUART_InitStruct->BaudRate            = 9600U;
+  LPUART_InitStruct->DataWidth           = LL_LPUART_DATAWIDTH_8B;
+  LPUART_InitStruct->StopBits            = LL_LPUART_STOPBITS_1;
+  LPUART_InitStruct->Parity              = LL_LPUART_PARITY_NONE ;
+  LPUART_InitStruct->TransferDirection   = LL_LPUART_DIRECTION_TX_RX;
+  LPUART_InitStruct->HardwareFlowControl = LL_LPUART_HWCONTROL_NONE;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#endif /* defined (LPUART1) */
+
+/**
+  * @}
+  */
+
+#endif /* USE_FULL_LL_DRIVER */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+