/**
|
******************************************************************************
|
* @file stm32l1xx_lcd.c
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* @author MCD Application Team
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* @version V1.3.1
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* @date 20-April-2015
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* @brief This file provides firmware functions to manage the following
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* functionalities of the LCD controller (LCD) peripheral:
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* + Initialization and configuration
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* + LCD RAM memory write
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* + Interrupts and flags management
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*
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* @verbatim
|
|
===============================================================================
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##### LCD Clock #####
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===============================================================================
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[..] LCDCLK is the same as RTCCLK.
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[..] To configure the RTCCLK/LCDCLK, proceed as follows:
|
(+) Enable the Power Controller (PWR) APB1 interface clock using the
|
RCC_APB1PeriphClockCmd() function.
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(+) Enable access to RTC domain using the PWR_RTCAccessCmd() function.
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(+) Select the RTC clock source using the RCC_RTCCLKConfig() function.
|
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[..] 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 and low power modes #####
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===============================================================================
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[..] The LCD still active during STOP mode.
|
|
##### How to use this driver #####
|
===============================================================================
|
[..]
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(#) Enable LCD clock using
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_LCD, ENABLE) function.
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(#) Configure the LCD prescaler, divider, duty, bias and voltage source
|
using LCD_Init() function.
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(#) Optionally you can enable/configure:
|
(++) LCD High Drive using the LCD_HighDriveCmd() function.
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(++) LCD COM/SEG Mux using the LCD_MuxSegmentCmd() function.
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(++) LCD Pulse ON Duration using the LCD_PulseOnDurationConfig() function.
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(++) LCD Dead Time using the LCD_DeadTimeConfig() function
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(++) The LCD Blink mode and frequency using the LCD_BlinkConfig() function.
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(++) The LCD Contrast using the LCD_ContrastConfig() function.
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(#) Call the LCD_WaitForSynchro() function to wait for LCD_FCR register
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synchronization.
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(#) Call the LCD_Cmd() to enable the LCD controller.
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(#) Wait until the LCD Controller status is enabled and the step-up
|
converter is ready using the LCD_GetFlagStatus() and
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LCD_FLAG_ENS and LCD_FLAG_RDY flags.
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(#) Write to the LCD RAM memory using the LCD_Write() function.
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(#) Request an update display using the LCD_UpdateDisplayRequest()
|
function.
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(#) Wait until the update display is finished by checking the UDD
|
flag status using the LCD_GetFlagStatus(LCD_FLAG_UDD).
|
|
@endverbatim
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|
******************************************************************************
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* @attention
|
*
|
* <h2><center>© COPYRIGHT 2015 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
|
*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
|
*/
|
|
/* Includes ------------------------------------------------------------------*/
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#include "stm32l1xx_lcd.h"
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#include "stm32l1xx_rcc.h"
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/** @addtogroup STM32L1xx_StdPeriph_Driver
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* @{
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*/
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/** @defgroup LCD
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* @brief LCD driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* ------------ LCD registers bit address in the alias region --------------- */
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#define LCD_OFFSET (LCD_BASE - PERIPH_BASE)
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/* --- CR Register ---*/
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/* Alias word address of LCDEN bit */
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#define CR_OFFSET (LCD_OFFSET + 0x00)
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#define LCDEN_BitNumber 0x00
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#define CR_LCDEN_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (LCDEN_BitNumber * 4))
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/* Alias word address of MUX_SEG bit */
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#define MUX_SEG_BitNumber 0x07
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#define CR_MUX_SEG_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (MUX_SEG_BitNumber * 4))
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|
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/* --- FCR Register ---*/
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/* Alias word address of HD bit */
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#define FCR_OFFSET (LCD_OFFSET + 0x04)
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#define HD_BitNumber 0x00
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#define FCR_HD_BB (PERIPH_BB_BASE + (FCR_OFFSET * 32) + (HD_BitNumber * 4))
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/* --- SR Register ---*/
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/* Alias word address of UDR bit */
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#define SR_OFFSET (LCD_OFFSET + 0x08)
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#define UDR_BitNumber 0x02
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#define SR_UDR_BB (PERIPH_BB_BASE + (SR_OFFSET * 32) + (UDR_BitNumber * 4))
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#define FCR_MASK ((uint32_t)0xFC03FFFF) /* LCD FCR Mask */
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#define CR_MASK ((uint32_t)0xFFFFFF81) /* LCD CR Mask */
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#define PON_MASK ((uint32_t)0xFFFFFF8F) /* LCD PON Mask */
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#define DEAD_MASK ((uint32_t)0xFFFFFC7F) /* LCD DEAD Mask */
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#define BLINK_MASK ((uint32_t)0xFFFC1FFF) /* LCD BLINK Mask */
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#define CONTRAST_MASK ((uint32_t)0xFFFFE3FF) /* LCD CONTRAST Mask */
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#define SYNCHRO_TIMEOUT ((uint32_t) 0x00008000)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup LCD_Private_Functions
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* @{
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*/
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/** @defgroup LCD_Group1 Initialization and Configuration functions
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* @brief Initialization and Configuration functions
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*
|
@verbatim
|
===============================================================================
|
##### Initialization and Configuration functions #####
|
===============================================================================
|
|
@endverbatim
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* @{
|
*/
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/**
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* @brief Deinitializes the LCD peripheral registers to their default reset
|
* values.
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* @param None
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* @retval None
|
*/
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void LCD_DeInit(void)
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{
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/* Enable LCD reset state */
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_LCD, ENABLE);
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/* Release LCD from reset state */
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_LCD, DISABLE);
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}
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/**
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* @brief Initializes the LCD peripheral according to the specified parameters
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* in the LCD_InitStruct.
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* @note This function can be used only when the LCD is disabled.
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* @param LCD_InitStruct: pointer to a LCD_InitTypeDef structure that contains
|
* the configuration information for the specified LCD peripheral.
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* @retval None
|
*/
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void LCD_Init(LCD_InitTypeDef* LCD_InitStruct)
|
{
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/* Check function parameters */
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assert_param(IS_LCD_PRESCALER(LCD_InitStruct->LCD_Prescaler));
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assert_param(IS_LCD_DIVIDER(LCD_InitStruct->LCD_Divider));
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assert_param(IS_LCD_DUTY(LCD_InitStruct->LCD_Duty));
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assert_param(IS_LCD_BIAS(LCD_InitStruct->LCD_Bias));
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assert_param(IS_LCD_VOLTAGE_SOURCE(LCD_InitStruct->LCD_VoltageSource));
|
|
LCD->FCR &= (uint32_t)FCR_MASK;
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LCD->FCR |= (uint32_t)(LCD_InitStruct->LCD_Prescaler | LCD_InitStruct->LCD_Divider);
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LCD_WaitForSynchro();
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|
LCD->CR &= (uint32_t)CR_MASK;
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LCD->CR |= (uint32_t)(LCD_InitStruct->LCD_Duty | LCD_InitStruct->LCD_Bias | \
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LCD_InitStruct->LCD_VoltageSource);
|
|
}
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/**
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* @brief Fills each LCD_InitStruct member with its default value.
|
* @param LCD_InitStruct: pointer to a LCD_InitTypeDef structure which will
|
* be initialized.
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* @retval None
|
*/
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void LCD_StructInit(LCD_InitTypeDef* LCD_InitStruct)
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{
|
/*--------------- Reset LCD init structure parameters values -----------------*/
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LCD_InitStruct->LCD_Prescaler = LCD_Prescaler_1; /*!< Initialize the LCD_Prescaler member */
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LCD_InitStruct->LCD_Divider = LCD_Divider_16; /*!< Initialize the LCD_Divider member */
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LCD_InitStruct->LCD_Duty = LCD_Duty_Static; /*!< Initialize the LCD_Duty member */
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LCD_InitStruct->LCD_Bias = LCD_Bias_1_4; /*!< Initialize the LCD_Bias member */
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LCD_InitStruct->LCD_VoltageSource = LCD_VoltageSource_Internal; /*!< Initialize the LCD_VoltageSource member */
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}
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/**
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* @brief Enables or disables the LCD Controller.
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* @param NewState: new state of the LCD peripheral.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
|
*/
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void LCD_Cmd(FunctionalState NewState)
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{
|
assert_param(IS_FUNCTIONAL_STATE(NewState));
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
|
|
*(__IO uint32_t *) CR_LCDEN_BB = (uint32_t)NewState;
|
}
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|
/**
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* @brief Waits until the LCD FCR register is synchronized in the LCDCLK domain.
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* This function must be called after any write operation to LCD_FCR register.
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* @param None
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* @retval None
|
*/
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void LCD_WaitForSynchro(void)
|
{
|
uint32_t synchrocounter = 0;
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uint32_t synchrostatus = 0x00;
|
|
/* Loop until FCRSF flag is set */
|
do
|
{
|
synchrostatus = LCD->SR & LCD_FLAG_FCRSF;
|
synchrocounter++;
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} while((synchrocounter != SYNCHRO_TIMEOUT) && (synchrostatus == 0x00));
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}
|
|
/**
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* @brief Enables or disables the low resistance divider. Displays with high
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* internal resistance may need a longer drive time to achieve
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* satisfactory contrast. This function is useful in this case if some
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* additional power consumption can be tolerated.
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* @note When this mode is enabled, the PulseOn Duration (PON) have to be
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* programmed to 1/CK_PS (LCD_PulseOnDuration_1).
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* @param NewState: new state of the low resistance divider.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void LCD_HighDriveCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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*(__IO uint32_t *) FCR_HD_BB = (uint32_t)NewState;
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}
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/**
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* @brief Enables or disables the Mux Segment.
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* @note This function can be used only when the LCD is disabled.
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* @param NewState: new state of the Mux Segment.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void LCD_MuxSegmentCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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*(__IO uint32_t *) CR_MUX_SEG_BB = (uint32_t)NewState;
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}
|
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/**
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* @brief Configures the LCD pulses on duration.
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* @param LCD_PulseOnDuration: specifies the LCD pulse on duration in terms of
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* CK_PS (prescaled LCD clock period) pulses.
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* This parameter can be one of the following values:
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* @arg LCD_PulseOnDuration_0: 0 pulse
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* @arg LCD_PulseOnDuration_1: Pulse ON duration = 1/CK_PS
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* @arg LCD_PulseOnDuration_2: Pulse ON duration = 2/CK_PS
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* @arg LCD_PulseOnDuration_3: Pulse ON duration = 3/CK_PS
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* @arg LCD_PulseOnDuration_4: Pulse ON duration = 4/CK_PS
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* @arg LCD_PulseOnDuration_5: Pulse ON duration = 5/CK_PS
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* @arg LCD_PulseOnDuration_6: Pulse ON duration = 6/CK_PS
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* @arg LCD_PulseOnDuration_7: Pulse ON duration = 7/CK_PS
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* @retval None
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*/
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void LCD_PulseOnDurationConfig(uint32_t LCD_PulseOnDuration)
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{
|
/* Check the parameters */
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assert_param(IS_LCD_PULSE_ON_DURATION(LCD_PulseOnDuration));
|
|
LCD->FCR &= (uint32_t)PON_MASK;
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LCD->FCR |= (uint32_t)(LCD_PulseOnDuration);
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}
|
|
/**
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* @brief Configures the LCD dead time.
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* @param LCD_DeadTime: specifies the LCD dead time.
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* This parameter can be one of the following values:
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* @arg LCD_DeadTime_0: No dead Time
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* @arg LCD_DeadTime_1: One Phase between different couple of Frame
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* @arg LCD_DeadTime_2: Two Phase between different couple of Frame
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* @arg LCD_DeadTime_3: Three Phase between different couple of Frame
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* @arg LCD_DeadTime_4: Four Phase between different couple of Frame
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* @arg LCD_DeadTime_5: Five Phase between different couple of Frame
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* @arg LCD_DeadTime_6: Six Phase between different couple of Frame
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* @arg LCD_DeadTime_7: Seven Phase between different couple of Frame
|
* @retval None
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*/
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void LCD_DeadTimeConfig(uint32_t LCD_DeadTime)
|
{
|
/* Check the parameters */
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assert_param(IS_LCD_DEAD_TIME(LCD_DeadTime));
|
|
LCD->FCR &= (uint32_t)DEAD_MASK;
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LCD->FCR |= (uint32_t)(LCD_DeadTime);
|
}
|
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/**
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* @brief Configures the LCD Blink mode and Blink frequency.
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* @param LCD_BlinkMode: specifies the LCD blink mode.
|
* This parameter can be one of the following values:
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* @arg LCD_BlinkMode_Off: Blink disabled
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* @arg LCD_BlinkMode_SEG0_COM0: Blink enabled on SEG[0], COM[0] (1 pixel)
|
* @arg LCD_BlinkMode_SEG0_AllCOM: Blink enabled on SEG[0], all COM (up to 8
|
* pixels according to the programmed duty)
|
* @arg LCD_BlinkMode_AllSEG_AllCOM: Blink enabled on all SEG and all COM
|
* (all pixels)
|
* @param LCD_BlinkFrequency: specifies the LCD blink frequency.
|
* This parameter can be one of the following values:
|
* @arg LCD_BlinkFrequency_Div8: The Blink frequency = fLcd/8
|
* @arg LCD_BlinkFrequency_Div16: The Blink frequency = fLcd/16
|
* @arg LCD_BlinkFrequency_Div32: The Blink frequency = fLcd/32
|
* @arg LCD_BlinkFrequency_Div64: The Blink frequency = fLcd/64
|
* @arg LCD_BlinkFrequency_Div128: The Blink frequency = fLcd/128
|
* @arg LCD_BlinkFrequency_Div256: The Blink frequency = fLcd/256
|
* @arg LCD_BlinkFrequency_Div512: The Blink frequency = fLcd/512
|
* @arg LCD_BlinkFrequency_Div1024: The Blink frequency = fLcd/1024
|
* @retval None
|
*/
|
void LCD_BlinkConfig(uint32_t LCD_BlinkMode, uint32_t LCD_BlinkFrequency)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_BLINK_MODE(LCD_BlinkMode));
|
assert_param(IS_LCD_BLINK_FREQUENCY(LCD_BlinkFrequency));
|
|
LCD->FCR &= (uint32_t)BLINK_MASK;
|
LCD->FCR |= (uint32_t)(LCD_BlinkMode | LCD_BlinkFrequency);
|
}
|
|
/**
|
* @brief Configures the LCD Contrast.
|
* @param LCD_Contrast: specifies the LCD Contrast.
|
* This parameter can be one of the following values:
|
* @arg LCD_Contrast_Level_0: Maximum Voltage = 2.60V
|
* @arg LCD_Contrast_Level_1: Maximum Voltage = 2.73V
|
* @arg LCD_Contrast_Level_2: Maximum Voltage = 2.86V
|
* @arg LCD_Contrast_Level_3: Maximum Voltage = 2.99V
|
* @arg LCD_Contrast_Level_4: Maximum Voltage = 3.12V
|
* @arg LCD_Contrast_Level_5: Maximum Voltage = 3.25V
|
* @arg LCD_Contrast_Level_6: Maximum Voltage = 3.38V
|
* @arg LCD_Contrast_Level_7: Maximum Voltage = 3.51V
|
* @retval None
|
*/
|
void LCD_ContrastConfig(uint32_t LCD_Contrast)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_CONTRAST(LCD_Contrast));
|
|
LCD->FCR &= (uint32_t)CONTRAST_MASK;
|
LCD->FCR |= (uint32_t)(LCD_Contrast);
|
}
|
|
/**
|
* @}
|
*/
|
|
/** @defgroup LCD_Group2 LCD RAM memory write functions
|
* @brief LCD RAM memory write functions
|
*
|
@verbatim
|
===============================================================================
|
##### LCD RAM memory write 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, it sets the UDR flag
|
in the LCD_SR register using the LCD_UpdateDisplayRequest() function.
|
|
[..] 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 LCD_RAMRegister: specifies the LCD Contrast.
|
* This parameter can be one of the following values:
|
* @arg LCD_RAMRegister_0: LCD RAM Register 0
|
* @arg LCD_RAMRegister_1: LCD RAM Register 1
|
* @arg LCD_RAMRegister_2: LCD RAM Register 2
|
* @arg LCD_RAMRegister_3: LCD RAM Register 3
|
* @arg LCD_RAMRegister_4: LCD RAM Register 4
|
* @arg LCD_RAMRegister_5: LCD RAM Register 5
|
* @arg LCD_RAMRegister_6: LCD RAM Register 6
|
* @arg LCD_RAMRegister_7: LCD RAM Register 7
|
* @arg LCD_RAMRegister_8: LCD RAM Register 8
|
* @arg LCD_RAMRegister_9: LCD RAM Register 9
|
* @arg LCD_RAMRegister_10: LCD RAM Register 10
|
* @arg LCD_RAMRegister_11: LCD RAM Register 11
|
* @arg LCD_RAMRegister_12: LCD RAM Register 12
|
* @arg LCD_RAMRegister_13: LCD RAM Register 13
|
* @arg LCD_RAMRegister_14: LCD RAM Register 14
|
* @arg LCD_RAMRegister_15: LCD RAM Register 15
|
* @param LCD_Data: specifies LCD Data Value to be written.
|
* @retval None
|
*/
|
void LCD_Write(uint32_t LCD_RAMRegister, uint32_t LCD_Data)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_RAM_REGISTER(LCD_RAMRegister));
|
|
/* Copy data bytes to RAM register */
|
LCD->RAM[LCD_RAMRegister] = (uint32_t)LCD_Data;
|
}
|
|
/**
|
* @brief Enables the Update Display Request.
|
* @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.
|
* @param None
|
* @retval None
|
*/
|
void LCD_UpdateDisplayRequest(void)
|
{
|
*(__IO uint32_t *) SR_UDR_BB = (uint32_t)0x01;
|
}
|
|
/**
|
* @}
|
*/
|
|
/** @defgroup LCD_Group3 Interrupts and flags management functions
|
* @brief Interrupts and flags management functions
|
*
|
@verbatim
|
===============================================================================
|
##### Interrupts and flags management functions #####
|
===============================================================================
|
|
@endverbatim
|
* @{
|
*/
|
|
/**
|
* @brief Enables or disables the specified LCD interrupts.
|
* @param LCD_IT: specifies the LCD interrupts sources to be enabled or disabled.
|
* This parameter can be any combination of the following values:
|
* @arg LCD_IT_SOF: Start of Frame Interrupt
|
* @arg LCD_IT_UDD: Update Display Done Interrupt
|
* @param NewState: new state of the specified LCD interrupts.
|
* This parameter can be: ENABLE or DISABLE.
|
* @retval None
|
*/
|
void LCD_ITConfig(uint32_t LCD_IT, FunctionalState NewState)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_IT(LCD_IT));
|
assert_param(IS_FUNCTIONAL_STATE(NewState));
|
|
if (NewState != DISABLE)
|
{
|
LCD->FCR |= LCD_IT;
|
}
|
else
|
{
|
LCD->FCR &= (uint32_t)~LCD_IT;
|
}
|
}
|
|
/**
|
* @brief Checks whether the specified LCD flag is set or not.
|
* @param LCD_FLAG: specifies the flag to check.
|
* This parameter can be one of the following values:
|
* @arg LCD_FLAG_ENS: LCD Enabled flag. It indicates the LCD controller status.
|
* @note The ENS bit is set immediately when the LCDEN bit in the LCD_CR
|
* goes from 0 to 1. On deactivation it reflects the real status of
|
* LCD so it becomes 0 at the end of the last displayed frame.
|
* @arg LCD_FLAG_SOF: Start of Frame flag. This flag is set by hardware at
|
* the beginning of a new frame, at the same time as the display data is
|
* updated.
|
* @arg LCD_FLAG_UDR: Update Display Request flag.
|
* @arg LCD_FLAG_UDD: Update Display Done flag.
|
* @arg LCD_FLAG_RDY: Step_up converter Ready flag. It indicates the status
|
* of the step-up converter.
|
* @arg LCD_FLAG_FCRSF: LCD Frame Control Register Synchronization Flag.
|
* This flag is set by hardware each time the LCD_FCR register is updated
|
* in the LCDCLK domain.
|
* @retval The new state of LCD_FLAG (SET or RESET).
|
*/
|
FlagStatus LCD_GetFlagStatus(uint32_t LCD_FLAG)
|
{
|
FlagStatus bitstatus = RESET;
|
|
/* Check the parameters */
|
assert_param(IS_LCD_GET_FLAG(LCD_FLAG));
|
|
if ((LCD->SR & LCD_FLAG) != (uint32_t)RESET)
|
{
|
bitstatus = SET;
|
}
|
else
|
{
|
bitstatus = RESET;
|
}
|
return bitstatus;
|
}
|
|
/**
|
* @brief Clears the LCD's pending flags.
|
* @param LCD_FLAG: specifies the flag to clear.
|
* This parameter can be any combination of the following values:
|
* @arg LCD_FLAG_SOF: Start of Frame Interrupt
|
* @arg LCD_FLAG_UDD: Update Display Done Interrupt
|
* @retval None
|
*/
|
void LCD_ClearFlag(uint32_t LCD_FLAG)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_CLEAR_FLAG(LCD_FLAG));
|
|
/* Clear the corresponding LCD flag */
|
LCD->CLR = (uint32_t)LCD_FLAG;
|
}
|
|
/**
|
* @brief Checks whether the specified RTC interrupt has occurred or not.
|
* @param LCD_IT: specifies the LCD interrupts sources to check.
|
* This parameter can be one of the following values:
|
* @arg LCD_IT_SOF: Start of Frame Interrupt
|
* @arg LCD_IT_UDD: Update Display Done Interrupt.
|
* @note If the device is in STOP mode (PCLK not provided) UDD will not
|
* generate an interrupt even if UDDIE = 1.
|
* If the display is not enabled the UDD interrupt will never occur.
|
* @retval The new state of the LCD_IT (SET or RESET).
|
*/
|
ITStatus LCD_GetITStatus(uint32_t LCD_IT)
|
{
|
ITStatus bitstatus = RESET;
|
|
/* Check the parameters */
|
assert_param(IS_LCD_GET_IT(LCD_IT));
|
|
if ((LCD->SR & LCD_IT) != (uint16_t)RESET)
|
{
|
bitstatus = SET;
|
}
|
else
|
{
|
bitstatus = RESET;
|
}
|
|
if (((LCD->FCR & LCD_IT) != (uint16_t)RESET) && (bitstatus != (uint32_t)RESET))
|
{
|
bitstatus = SET;
|
}
|
else
|
{
|
bitstatus = RESET;
|
}
|
return bitstatus;
|
}
|
|
/**
|
* @brief Clears the LCD's interrupt pending bits.
|
* @param LCD_IT: specifies the interrupt pending bit to clear.
|
* This parameter can be any combination of the following values:
|
* @arg LCD_IT_SOF: Start of Frame Interrupt
|
* @arg LCD_IT_UDD: Update Display Done Interrupt
|
* @retval None
|
*/
|
void LCD_ClearITPendingBit(uint32_t LCD_IT)
|
{
|
/* Check the parameters */
|
assert_param(IS_LCD_IT(LCD_IT));
|
|
/* Clear the corresponding LCD pending bit */
|
LCD->CLR = (uint32_t)LCD_IT;
|
}
|
|
/**
|
* @}
|
*/
|
|
/**
|
* @}
|
*/
|
|
/**
|
* @}
|
*/
|
|
/**
|
* @}
|
*/
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
