/**
******************************************************************************
* @file stm32l1xx_hal_lcd.c
* @author MCD Application Team
* @brief LCD Controller HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the LCD Controller (LCD) peripheral:
* + Initialization/de-initialization methods
* + I/O operation methods
* + Peripheral State methods
*
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..] The LCD HAL driver can be used as follows:
(#) Declare a LCD_HandleTypeDef handle structure.
(#) Initialize the LCD low level resources by implement the HAL_LCD_MspInit() API:
(##) Enable the LCDCLK (same as RTCCLK): to configure the RTCCLK/LCDCLK, proceed as follows:
(+++) Use RCC function HAL_RCCEx_PeriphCLKConfig in indicating RCC_PERIPHCLK_LCD and
selected clock source (HSE, LSI or LSE)
(+++) The frequency generator allows you to achieve various LCD frame rates
starting from an LCD input clock frequency (LCDCLK) which can vary
from 32 kHz up to 1 MHz.
(##) LCD pins configuration:
(+++) Enable the clock for the LCD GPIOs.
(+++) Configure these LCD pins as alternate function no-pull.
(##) Enable the LCD interface clock.
(#) Program the Prescaler, Divider, Blink mode, Blink Frequency Duty, Bias,
Voltage Source, Dead Time, Pulse On Duration and Contrast in the hlcd Init structure.
(#) Initialize the LCD registers by calling the HAL_LCD_Init() API.
-@- The HAL_LCD_Init() API configures also the low level Hardware GPIO, CLOCK, ...etc)
by calling the custumed HAL_LCD_MspInit() API.
-@- After calling the HAL_LCD_Init() the LCD RAM memory is cleared
(#) Optionally you can update the LCD configuration using these macros:
(++) LCD High Drive using the __HAL_LCD_HIGHDRIVER_ENABLE() and __HAL_LCD_HIGHDRIVER_DISABLE() macros
(++) LCD Pulse ON Duration using the __HAL_LCD_PULSEONDURATION_CONFIG() macro
(++) LCD Dead Time using the __HAL_LCD_DEADTIME_CONFIG() macro
(++) The LCD Blink mode and frequency using the __HAL_LCD_BLINK_CONFIG() macro
(++) The LCD Contrast using the __HAL_LCD_CONTRAST_CONFIG() macro
(#) Write to the LCD RAM memory using the HAL_LCD_Write() API, this API can be called
more time to update the different LCD RAM registers before calling
HAL_LCD_UpdateDisplayRequest() API.
(#) The HAL_LCD_Clear() API can be used to clear the LCD RAM memory.
(#) When LCD RAM memory is updated enable the update display request using
the HAL_LCD_UpdateDisplayRequest() API.
[..] LCD and low power modes:
(#) The LCD remain active during STOP mode.
@endverbatim
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx_hal.h"
/** @addtogroup STM32L1xx_HAL_Driver
* @{
*/
#ifdef HAL_LCD_MODULE_ENABLED
#if defined (STM32L100xB) || defined (STM32L100xBA) || defined (STM32L100xC) ||\
defined (STM32L152xB) || defined (STM32L152xBA) || defined (STM32L152xC) || defined (STM32L152xCA) || defined (STM32L152xD) || defined (STM32L152xE) || defined (STM32L152xDX) ||\
defined (STM32L162xC) || defined (STM32L162xCA) || defined (STM32L162xD) || defined (STM32L162xE) || defined (STM32L162xDX)
/** @defgroup LCD LCD
* @brief LCD HAL module driver
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup LCD_Private_Defines LCD Private Defines
* @{
*/
#define LCD_TIMEOUT_VALUE 1000
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup LCD_Exported_Functions LCD Exported Functions
* @{
*/
/** @defgroup LCD_Exported_Functions_Group1 Initialization/de-initialization methods
* @brief Initialization and Configuration functions
*
@verbatim
===============================================================================
##### Initialization and Configuration functions #####
===============================================================================
[..]
@endverbatim
* @{
*/
/**
* @brief DeInitializes the LCD peripheral.
* @param hlcd LCD handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_LCD_DeInit(LCD_HandleTypeDef *hlcd)
{
/* Check the LCD handle allocation */
if(hlcd == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_LCD_ALL_INSTANCE(hlcd->Instance));
/* Check the LCD peripheral state */
if(hlcd->State == HAL_LCD_STATE_BUSY)
{
return HAL_BUSY;
}
hlcd->State = HAL_LCD_STATE_BUSY;
/* Disable the peripheral */
__HAL_LCD_DISABLE(hlcd);
/*Disable Highdrive by default*/
__HAL_LCD_HIGHDRIVER_DISABLE(hlcd);
/* DeInit the low level hardware */
HAL_LCD_MspDeInit(hlcd);
hlcd->ErrorCode = HAL_LCD_ERROR_NONE;
hlcd->State = HAL_LCD_STATE_RESET;
/* Release Lock */
__HAL_UNLOCK(hlcd);
return HAL_OK;
}
/**
* @brief Initializes the LCD peripheral according to the specified parameters
* in the LCD_InitStruct.
* @note This function can be used only when the LCD is disabled.
* The LCD HighDrive can be enabled/disabled using related macros up to user.
* @param hlcd LCD handle
* @retval None
*/
HAL_StatusTypeDef HAL_LCD_Init(LCD_HandleTypeDef *hlcd)
{
uint32_t tickstart = 0x00;
uint8_t counter = 0;
/* Check the LCD handle allocation */
if(hlcd == NULL)
{
return HAL_ERROR;
}
/* Check function parameters */
assert_param(IS_LCD_ALL_INSTANCE(hlcd->Instance));
assert_param(IS_LCD_PRESCALER(hlcd->Init.Prescaler));
assert_param(IS_LCD_DIVIDER(hlcd->Init.Divider));
assert_param(IS_LCD_DUTY(hlcd->Init.Duty));
assert_param(IS_LCD_BIAS(hlcd->Init.Bias));
assert_param(IS_LCD_VOLTAGE_SOURCE(hlcd->Init.VoltageSource));
assert_param(IS_LCD_PULSE_ON_DURATION(hlcd->Init.PulseOnDuration));
assert_param(IS_LCD_HIGHDRIVE(hlcd->Init.HighDrive));
assert_param(IS_LCD_DEAD_TIME(hlcd->Init.DeadTime));
assert_param(IS_LCD_CONTRAST(hlcd->Init.Contrast));
assert_param(IS_LCD_BLINK_FREQUENCY(hlcd->Init.BlinkFrequency));
assert_param(IS_LCD_BLINK_MODE(hlcd->Init.BlinkMode));
assert_param(IS_LCD_MUXSEGMENT(hlcd->Init.MuxSegment));
if(hlcd->State == HAL_LCD_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hlcd->Lock = HAL_UNLOCKED;
/* Initialize the low level hardware (MSP) */
HAL_LCD_MspInit(hlcd);
}
hlcd->State = HAL_LCD_STATE_BUSY;
/* Disable the peripheral */
__HAL_LCD_DISABLE(hlcd);
/* Clear the LCD_RAM registers and enable the display request by setting the UDR bit
in the LCD_SR register */
for(counter = LCD_RAM_REGISTER0; counter <= LCD_RAM_REGISTER15; counter++)
{
hlcd->Instance->RAM[counter] = 0;
}
/* Enable the display request */
SET_BIT(hlcd->Instance->SR, LCD_SR_UDR);
/* Configure the LCD Prescaler, Divider, Blink mode and Blink Frequency:
Set PS[3:0] bits according to hlcd->Init.Prescaler value
Set DIV[3:0] bits according to hlcd->Init.Divider value
Set BLINK[1:0] bits according to hlcd->Init.BlinkMode value
Set BLINKF[2:0] bits according to hlcd->Init.BlinkFrequency value
Set DEAD[2:0] bits according to hlcd->Init.DeadTime value
Set PON[2:0] bits according to hlcd->Init.PulseOnDuration value
Set CC[2:0] bits according to hlcd->Init.Contrast value
Set HD[0] bit according to hlcd->Init.HighDrive value */
MODIFY_REG(hlcd->Instance->FCR, \
(LCD_FCR_PS | LCD_FCR_DIV | LCD_FCR_BLINK| LCD_FCR_BLINKF | \
LCD_FCR_DEAD | LCD_FCR_PON | LCD_FCR_CC), \
(hlcd->Init.Prescaler | hlcd->Init.Divider | hlcd->Init.BlinkMode | hlcd->Init.BlinkFrequency | \
hlcd->Init.DeadTime | hlcd->Init.PulseOnDuration | hlcd->Init.Contrast | hlcd->Init.HighDrive));
/* Wait until LCD Frame Control Register Synchronization flag (FCRSF) is set in the LCD_SR register
This bit is set by hardware each time the LCD_FCR register is updated in the LCDCLK
domain. It is cleared by hardware when writing to the LCD_FCR register.*/
LCD_WaitForSynchro(hlcd);
/* Configure the LCD Duty, Bias, Voltage Source, Dead Time:
Set DUTY[2:0] bits according to hlcd->Init.Duty value
Set BIAS[1:0] bits according to hlcd->Init.Bias value
Set VSEL bit according to hlcd->Init.VoltageSource value
Set MUX_SEG bit according to hlcd->Init.MuxSegment value */
MODIFY_REG(hlcd->Instance->CR, \
(LCD_CR_DUTY | LCD_CR_BIAS | LCD_CR_VSEL | LCD_CR_MUX_SEG), \
(hlcd->Init.Duty | hlcd->Init.Bias | hlcd->Init.VoltageSource | hlcd->Init.MuxSegment));
/* Enable the peripheral */
__HAL_LCD_ENABLE(hlcd);
/* Get timeout */
tickstart = HAL_GetTick();
/* Wait Until the LCD is enabled */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_ENS) == RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_ENS;
return HAL_TIMEOUT;
}
}
/* Get timeout */
tickstart = HAL_GetTick();
/*!< Wait Until the LCD Booster is ready */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_RDY) == RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_RDY;
return HAL_TIMEOUT;
}
}
/* Initialize the LCD state */
hlcd->ErrorCode = HAL_LCD_ERROR_NONE;
hlcd->State= HAL_LCD_STATE_READY;
return HAL_OK;
}
/**
* @brief LCD MSP DeInit.
* @param hlcd LCD handle
* @retval None
*/
__weak void HAL_LCD_MspDeInit(LCD_HandleTypeDef *hlcd)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hlcd);
/* NOTE: This function Should not be modified, when the callback is needed,
the HAL_LCD_MspDeInit could be implemented in the user file
*/
}
/**
* @brief LCD MSP Init.
* @param hlcd LCD handle
* @retval None
*/
__weak void HAL_LCD_MspInit(LCD_HandleTypeDef *hlcd)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hlcd);
/* NOTE: This function Should not be modified, when the callback is needed,
the HAL_LCD_MspInit could be implemented in the user file
*/
}
/**
* @}
*/
/** @defgroup LCD_Exported_Functions_Group2 IO operation methods
* @brief LCD RAM functions
*
@verbatim
===============================================================================
##### IO operation functions #####
===============================================================================
[..] Using its double buffer memory the LCD controller ensures the coherency of the
displayed information without having to use interrupts to control LCD_RAM
modification.
(+)The application software can access the first buffer level (LCD_RAM) through
the APB interface. Once it has modified the LCD_RAM using the HAL_LCD_Write() API,
it sets the UDR flag in the LCD_SR register using the HAL_LCD_UpdateDisplayRequest() API.
This UDR flag (update display request) requests the updated information to be
moved into the second buffer level (LCD_DISPLAY).
(+)This operation is done synchronously with the frame (at the beginning of the
next frame), until the update is completed, the LCD_RAM is write protected and
the UDR flag stays high.
(+)Once the update is completed another flag (UDD - Update Display Done) is set and
generates an interrupt if the UDDIE bit in the LCD_FCR register is set.
The time it takes to update LCD_DISPLAY is, in the worst case, one odd and one
even frame.
(+)The update will not occur (UDR = 1 and UDD = 0) until the display is
enabled (LCDEN = 1).
@endverbatim
* @{
*/
/**
* @brief Writes a word in the specific LCD RAM.
* @param hlcd LCD handle
* @param RAMRegisterIndex specifies the LCD RAM Register.
* This parameter can be one of the following values:
* @arg LCD_RAM_REGISTER0: LCD RAM Register 0
* @arg LCD_RAM_REGISTER1: LCD RAM Register 1
* @arg LCD_RAM_REGISTER2: LCD RAM Register 2
* @arg LCD_RAM_REGISTER3: LCD RAM Register 3
* @arg LCD_RAM_REGISTER4: LCD RAM Register 4
* @arg LCD_RAM_REGISTER5: LCD RAM Register 5
* @arg LCD_RAM_REGISTER6: LCD RAM Register 6
* @arg LCD_RAM_REGISTER7: LCD RAM Register 7
* @arg LCD_RAM_REGISTER8: LCD RAM Register 8
* @arg LCD_RAM_REGISTER9: LCD RAM Register 9
* @arg LCD_RAM_REGISTER10: LCD RAM Register 10
* @arg LCD_RAM_REGISTER11: LCD RAM Register 11
* @arg LCD_RAM_REGISTER12: LCD RAM Register 12
* @arg LCD_RAM_REGISTER13: LCD RAM Register 13
* @arg LCD_RAM_REGISTER14: LCD RAM Register 14
* @arg LCD_RAM_REGISTER15: LCD RAM Register 15
* @param RAMRegisterMask specifies the LCD RAM Register Data Mask.
* @param Data specifies LCD Data Value to be written.
* @retval None
*/
HAL_StatusTypeDef HAL_LCD_Write(LCD_HandleTypeDef *hlcd, uint32_t RAMRegisterIndex, uint32_t RAMRegisterMask, uint32_t Data)
{
uint32_t tickstart = 0x00;
if((hlcd->State == HAL_LCD_STATE_READY) || (hlcd->State == HAL_LCD_STATE_BUSY))
{
/* Check the parameters */
assert_param(IS_LCD_RAM_REGISTER(RAMRegisterIndex));
if(hlcd->State == HAL_LCD_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hlcd);
hlcd->State = HAL_LCD_STATE_BUSY;
/* Get timeout */
tickstart = HAL_GetTick();
/*!< Wait Until the LCD is ready */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_UDR) != RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_UDR;
/* Process Unlocked */
__HAL_UNLOCK(hlcd);
return HAL_TIMEOUT;
}
}
}
/* Copy the new Data bytes to LCD RAM register */
MODIFY_REG(hlcd->Instance->RAM[RAMRegisterIndex], ~(RAMRegisterMask), Data);
return HAL_OK;
}
else
{
return HAL_ERROR;
}
}
/**
* @brief Clears the LCD RAM registers.
* @param hlcd: LCD handle
* @retval None
*/
HAL_StatusTypeDef HAL_LCD_Clear(LCD_HandleTypeDef *hlcd)
{
uint32_t tickstart = 0x00;
uint32_t counter = 0;
if((hlcd->State == HAL_LCD_STATE_READY) || (hlcd->State == HAL_LCD_STATE_BUSY))
{
/* Process Locked */
__HAL_LOCK(hlcd);
hlcd->State = HAL_LCD_STATE_BUSY;
/* Get timeout */
tickstart = HAL_GetTick();
/*!< Wait Until the LCD is ready */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_UDR) != RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_UDR;
/* Process Unlocked */
__HAL_UNLOCK(hlcd);
return HAL_TIMEOUT;
}
}
/* Clear the LCD_RAM registers */
for(counter = LCD_RAM_REGISTER0; counter <= LCD_RAM_REGISTER15; counter++)
{
hlcd->Instance->RAM[counter] = 0;
}
/* Update the LCD display */
HAL_LCD_UpdateDisplayRequest(hlcd);
return HAL_OK;
}
else
{
return HAL_ERROR;
}
}
/**
* @brief Enables the Update Display Request.
* @param hlcd LCD handle
* @note Each time software modifies the LCD_RAM it must set the UDR bit to
* transfer the updated data to the second level buffer.
* The UDR bit stays set until the end of the update and during this
* time the LCD_RAM is write protected.
* @note When the display is disabled, the update is performed for all
* LCD_DISPLAY locations.
* When the display is enabled, the update is performed only for locations
* for which commons are active (depending on DUTY). For example if
* DUTY = 1/2, only the LCD_DISPLAY of COM0 and COM1 will be updated.
* @retval None
*/
HAL_StatusTypeDef HAL_LCD_UpdateDisplayRequest(LCD_HandleTypeDef *hlcd)
{
uint32_t tickstart = 0x00;
/* Clear the Update Display Done flag before starting the update display request */
__HAL_LCD_CLEAR_FLAG(hlcd, LCD_FLAG_UDD);
/* Enable the display request */
hlcd->Instance->SR |= LCD_SR_UDR;
/* Get timeout */
tickstart = HAL_GetTick();
/*!< Wait Until the LCD display is done */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_UDD) == RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_UDD;
/* Process Unlocked */
__HAL_UNLOCK(hlcd);
return HAL_TIMEOUT;
}
}
hlcd->State = HAL_LCD_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hlcd);
return HAL_OK;
}
/**
* @}
*/
/** @defgroup LCD_Exported_Functions_Group3 Peripheral State methods
* @brief LCD State functions
*
@verbatim
===============================================================================
##### Peripheral State functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to control the LCD:
(+) HAL_LCD_GetState() API can be helpful to check in run-time the state of the LCD peripheral State.
(+) HAL_LCD_GetError() API to return the LCD error code.
@endverbatim
* @{
*/
/**
* @brief Returns the LCD state.
* @param hlcd: LCD handle
* @retval HAL state
*/
HAL_LCD_StateTypeDef HAL_LCD_GetState(LCD_HandleTypeDef *hlcd)
{
return hlcd->State;
}
/**
* @brief Return the LCD error code
* @param hlcd: LCD handle
* @retval LCD Error Code
*/
uint32_t HAL_LCD_GetError(LCD_HandleTypeDef *hlcd)
{
return hlcd->ErrorCode;
}
/**
* @}
*/
/**
* @}
*/
/** @defgroup LCD_Private_Functions LCD Private Functions
* @{
*/
/**
* @brief Waits until the LCD FCR register is synchronized in the LCDCLK domain.
* This function must be called after any write operation to LCD_FCR register.
* @retval None
*/
HAL_StatusTypeDef LCD_WaitForSynchro(LCD_HandleTypeDef *hlcd)
{
uint32_t tickstart = 0x00;
/* Get timeout */
tickstart = HAL_GetTick();
/* Loop until FCRSF flag is set */
while(__HAL_LCD_GET_FLAG(hlcd, LCD_FLAG_FCRSF) == RESET)
{
if((HAL_GetTick() - tickstart ) > LCD_TIMEOUT_VALUE)
{
hlcd->ErrorCode = HAL_LCD_ERROR_FCRSF;
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @}
*/
/**
* @}
*/
#endif /* STM32L100xB || STM32L100xBA || STM32L100xC ||... || STM32L162xD || STM32L162xE || STM32L162xDX */
#endif /* HAL_LCD_MODULE_ENABLED */
/**
* @}
*/