/** | |
****************************************************************************** | |
* @file stm32l1xx_lcd.c | |
* @author MCD Application Team | |
* @version V1.1.1 | |
* @date 05-March-2012 | |
* @brief This file provides firmware functions to manage the following | |
* functionalities of the LCD controller (LCD) peripheral: | |
* + Initialization and configuration | |
* + LCD RAM memory write | |
* + Interrupts and flags management | |
* | |
* @verbatim | |
=============================================================================== | |
##### LCD Clock ##### | |
=============================================================================== | |
[..] LCDCLK is the same as RTCCLK. | |
[..] To configure the RTCCLK/LCDCLK, proceed as follows: | |
(+) Enable the Power Controller (PWR) APB1 interface clock using the | |
RCC_APB1PeriphClockCmd() function. | |
(+) Enable access to RTC domain using the PWR_RTCAccessCmd() function. | |
(+) Select the RTC clock source using the RCC_RTCCLKConfig() function. | |
[..] 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 ##### | |
=============================================================================== | |
[..] The LCD still active during STOP mode. | |
##### How to use this driver ##### | |
=============================================================================== | |
[..] | |
(#) Enable LCD clock using | |
RCC_APB1PeriphClockCmd(RCC_APB1Periph_LCD, ENABLE) function. | |
(#) Configure the LCD prescaler, divider, duty, bias and voltage source | |
using LCD_Init() function. | |
(#) Optionally you can enable/configure: | |
(++) LCD High Drive using the LCD_HighDriveCmd() function. | |
(++) LCD COM/SEG Mux using the LCD_MuxSegmentCmd() function. | |
(++) LCD Pulse ON Duration using the LCD_PulseOnDurationConfig() function. | |
(++) LCD Dead Time using the LCD_DeadTimeConfig() function | |
(++) The LCD Blink mode and frequency using the LCD_BlinkConfig() function. | |
(++) The LCD Contrast using the LCD_ContrastConfig() function. | |
(#) Call the LCD_WaitForSynchro() function to wait for LCD_FCR register | |
synchronization. | |
(#) Call the LCD_Cmd() to enable the LCD controller. | |
(#) Wait until the LCD Controller status is enabled and the step-up | |
converter is ready using the LCD_GetFlagStatus() and | |
LCD_FLAG_ENS and LCD_FLAG_RDY flags. | |
(#) Write to the LCD RAM memory using the LCD_Write() function. | |
(#) Request an update display using the LCD_UpdateDisplayRequest() | |
function. | |
(#) Wait until the update display is finished by checking the UDD | |
flag status using the LCD_GetFlagStatus(LCD_FLAG_UDD). | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2> | |
* | |
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); | |
* You may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at: | |
* | |
* http://www.st.com/software_license_agreement_liberty_v2 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32l1xx_lcd.h" | |
#include "stm32l1xx_rcc.h" | |
/** @addtogroup STM32L1xx_StdPeriph_Driver | |
* @{ | |
*/ | |
/** @defgroup LCD | |
* @brief LCD driver modules | |
* @{ | |
*/ | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/* ------------ LCD registers bit address in the alias region --------------- */ | |
#define LCD_OFFSET (LCD_BASE - PERIPH_BASE) | |
/* --- CR Register ---*/ | |
/* Alias word address of LCDEN bit */ | |
#define CR_OFFSET (LCD_OFFSET + 0x00) | |
#define LCDEN_BitNumber 0x00 | |
#define CR_LCDEN_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (LCDEN_BitNumber * 4)) | |
/* Alias word address of MUX_SEG bit */ | |
#define MUX_SEG_BitNumber 0x07 | |
#define CR_MUX_SEG_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (MUX_SEG_BitNumber * 4)) | |
/* --- FCR Register ---*/ | |
/* Alias word address of HD bit */ | |
#define FCR_OFFSET (LCD_OFFSET + 0x04) | |
#define HD_BitNumber 0x00 | |
#define FCR_HD_BB (PERIPH_BB_BASE + (FCR_OFFSET * 32) + (HD_BitNumber * 4)) | |
/* --- SR Register ---*/ | |
/* Alias word address of UDR bit */ | |
#define SR_OFFSET (LCD_OFFSET + 0x08) | |
#define UDR_BitNumber 0x02 | |
#define SR_UDR_BB (PERIPH_BB_BASE + (SR_OFFSET * 32) + (UDR_BitNumber * 4)) | |
#define FCR_MASK ((uint32_t)0xFC03FFFF) /* LCD FCR Mask */ | |
#define CR_MASK ((uint32_t)0xFFFFFF81) /* LCD CR Mask */ | |
#define PON_MASK ((uint32_t)0xFFFFFF8F) /* LCD PON Mask */ | |
#define DEAD_MASK ((uint32_t)0xFFFFFC7F) /* LCD DEAD Mask */ | |
#define BLINK_MASK ((uint32_t)0xFFFC1FFF) /* LCD BLINK Mask */ | |
#define CONTRAST_MASK ((uint32_t)0xFFFFE3FF) /* LCD CONTRAST Mask */ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/** @defgroup LCD_Private_Functions | |
* @{ | |
*/ | |
/** @defgroup LCD_Group1 Initialization and Configuration functions | |
* @brief Initialization and Configuration functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Initialization and Configuration functions ##### | |
=============================================================================== | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Deinitializes the LCD peripheral registers to their default reset | |
* values. | |
* @param None | |
* @retval None | |
*/ | |
void LCD_DeInit(void) | |
{ | |
/* Enable LCD reset state */ | |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_LCD, ENABLE); | |
/* Release LCD from reset state */ | |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_LCD, DISABLE); | |
} | |
/** | |
* @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. | |
* @param LCD_InitStruct: pointer to a LCD_InitTypeDef structure that contains | |
* the configuration information for the specified LCD peripheral. | |
* @retval None | |
*/ | |
void LCD_Init(LCD_InitTypeDef* LCD_InitStruct) | |
{ | |
/* Check function parameters */ | |
assert_param(IS_LCD_PRESCALER(LCD_InitStruct->LCD_Prescaler)); | |
assert_param(IS_LCD_DIVIDER(LCD_InitStruct->LCD_Divider)); | |
assert_param(IS_LCD_DUTY(LCD_InitStruct->LCD_Duty)); | |
assert_param(IS_LCD_BIAS(LCD_InitStruct->LCD_Bias)); | |
assert_param(IS_LCD_VOLTAGE_SOURCE(LCD_InitStruct->LCD_VoltageSource)); | |
LCD->FCR &= (uint32_t)FCR_MASK; | |
LCD->FCR |= (uint32_t)(LCD_InitStruct->LCD_Prescaler | LCD_InitStruct->LCD_Divider); | |
LCD_WaitForSynchro(); | |
LCD->CR &= (uint32_t)CR_MASK; | |
LCD->CR |= (uint32_t)(LCD_InitStruct->LCD_Duty | LCD_InitStruct->LCD_Bias | \ | |
LCD_InitStruct->LCD_VoltageSource); | |
} | |
/** | |
* @brief Fills each LCD_InitStruct member with its default value. | |
* @param LCD_InitStruct: pointer to a LCD_InitTypeDef structure which will | |
* be initialized. | |
* @retval None | |
*/ | |
void LCD_StructInit(LCD_InitTypeDef* LCD_InitStruct) | |
{ | |
/*--------------- Reset LCD init structure parameters values -----------------*/ | |
LCD_InitStruct->LCD_Prescaler = LCD_Prescaler_1; /*!< Initialize the LCD_Prescaler member */ | |
LCD_InitStruct->LCD_Divider = LCD_Divider_16; /*!< Initialize the LCD_Divider member */ | |
LCD_InitStruct->LCD_Duty = LCD_Duty_Static; /*!< Initialize the LCD_Duty member */ | |
LCD_InitStruct->LCD_Bias = LCD_Bias_1_4; /*!< Initialize the LCD_Bias member */ | |
LCD_InitStruct->LCD_VoltageSource = LCD_VoltageSource_Internal; /*!< Initialize the LCD_VoltageSource member */ | |
} | |
/** | |
* @brief Enables or disables the LCD Controller. | |
* @param NewState: new state of the LCD peripheral. | |
* This parameter can be: ENABLE or DISABLE. | |
* @retval None | |
*/ | |
void LCD_Cmd(FunctionalState NewState) | |
{ | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
/* Check the parameters */ | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
*(__IO uint32_t *) CR_LCDEN_BB = (uint32_t)NewState; | |
} | |
/** | |
* @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. | |
* @param None | |
* @retval None | |
*/ | |
void LCD_WaitForSynchro(void) | |
{ | |
/* Loop until FCRSF flag is set */ | |
while ((LCD->SR & LCD_FLAG_FCRSF) == (uint32_t)RESET) | |
{ | |
} | |
} | |
/** | |
* @brief Enables or disables the low resistance divider. Displays with high | |
* internal resistance may need a longer drive time to achieve | |
* satisfactory contrast. This function is useful in this case if some | |
* additional power consumption can be tolerated. | |
* @note When this mode is enabled, the PulseOn Duration (PON) have to be | |
* programmed to 1/CK_PS (LCD_PulseOnDuration_1). | |
* @param NewState: new state of the low resistance divider. | |
* This parameter can be: ENABLE or DISABLE. | |
* @retval None | |
*/ | |
void LCD_HighDriveCmd(FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
*(__IO uint32_t *) FCR_HD_BB = (uint32_t)NewState; | |
} | |
/** | |
* @brief Enables or disables the Mux Segment. | |
* @note This function can be used only when the LCD is disabled. | |
* @param NewState: new state of the Mux Segment. | |
* This parameter can be: ENABLE or DISABLE. | |
* @retval None | |
*/ | |
void LCD_MuxSegmentCmd(FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
*(__IO uint32_t *) CR_MUX_SEG_BB = (uint32_t)NewState; | |
} | |
/** | |
* @brief Configures the LCD pulses on duration. | |
* @param LCD_PulseOnDuration: specifies the LCD pulse on duration in terms of | |
* CK_PS (prescaled LCD clock period) pulses. | |
* This parameter can be one of the following values: | |
* @arg LCD_PulseOnDuration_0: 0 pulse | |
* @arg LCD_PulseOnDuration_1: Pulse ON duration = 1/CK_PS | |
* @arg LCD_PulseOnDuration_2: Pulse ON duration = 2/CK_PS | |
* @arg LCD_PulseOnDuration_3: Pulse ON duration = 3/CK_PS | |
* @arg LCD_PulseOnDuration_4: Pulse ON duration = 4/CK_PS | |
* @arg LCD_PulseOnDuration_5: Pulse ON duration = 5/CK_PS | |
* @arg LCD_PulseOnDuration_6: Pulse ON duration = 6/CK_PS | |
* @arg LCD_PulseOnDuration_7: Pulse ON duration = 7/CK_PS | |
* @retval None | |
*/ | |
void LCD_PulseOnDurationConfig(uint32_t LCD_PulseOnDuration) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_LCD_PULSE_ON_DURATION(LCD_PulseOnDuration)); | |
LCD->FCR &= (uint32_t)PON_MASK; | |
LCD->FCR |= (uint32_t)(LCD_PulseOnDuration); | |
} | |
/** | |
* @brief Configures the LCD dead time. | |
* @param LCD_DeadTime: specifies the LCD dead time. | |
* This parameter can be one of the following values: | |
* @arg LCD_DeadTime_0: No dead Time | |
* @arg LCD_DeadTime_1: One Phase between different couple of Frame | |
* @arg LCD_DeadTime_2: Two Phase between different couple of Frame | |
* @arg LCD_DeadTime_3: Three Phase between different couple of Frame | |
* @arg LCD_DeadTime_4: Four Phase between different couple of Frame | |
* @arg LCD_DeadTime_5: Five Phase between different couple of Frame | |
* @arg LCD_DeadTime_6: Six Phase between different couple of Frame | |
* @arg LCD_DeadTime_7: Seven Phase between different couple of Frame | |
* @retval None | |
*/ | |
void LCD_DeadTimeConfig(uint32_t LCD_DeadTime) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_LCD_DEAD_TIME(LCD_DeadTime)); | |
LCD->FCR &= (uint32_t)DEAD_MASK; | |
LCD->FCR |= (uint32_t)(LCD_DeadTime); | |
} | |
/** | |
* @brief Configures the LCD Blink mode and Blink frequency. | |
* @param LCD_BlinkMode: specifies the LCD blink mode. | |
* This parameter can be one of the following values: | |
* @arg LCD_BlinkMode_Off: Blink disabled | |
* @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; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
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