You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
257 lines
10 KiB
257 lines
10 KiB
/**
|
|
******************************************************************************
|
|
* @file stm32l0xx_ll_lpuart.c
|
|
* @author MCD Application Team
|
|
* @brief LPUART LL module driver.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© 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 "stm32l0xx_ll_lpuart.h"
|
|
#include "stm32l0xx_ll_rcc.h"
|
|
#include "stm32l0xx_ll_bus.h"
|
|
#ifdef USE_FULL_ASSERT
|
|
#include "stm32_assert.h"
|
|
#else
|
|
#define assert_param(expr) ((void)0U)
|
|
#endif
|
|
|
|
/** @addtogroup STM32L0xx_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, 10600000].*/
|
|
#define IS_LL_LPUART_BAUDRATE(__BAUDRATE__) (((__BAUDRATE__) <= 10600000U) && ((__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_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_LPUART1);
|
|
|
|
/* Release reset of LPUART peripheral */
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_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****/
|
|
|
|
|