2015-04-16 01:00 AM
Hello,
I'm working on a custom board STM32l152 that include LCD (1/4 duty & 1/3 bias) I just want to enable all signal ( 64 = 16 * 4Com ) in order to check the screen. somehow only 1 (of 4) raw is working. this is my code : //////////////////////////////////////////////////////////////////////////////////////////////////////////////////*!< Enable GPIOA, GPIOB, GPIOC AHB Clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC, ENABLE);//Segments 0 - 4
GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_LCD); //Segments 5 - 6 GPIO_PinAFConfig(GPIOC, GPIO_PinSource4, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOC, GPIO_PinSource5, GPIO_AF_LCD); //Segments 7 - 8 GPIO_PinAFConfig(GPIOB, GPIO_PinSource0, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOB, GPIO_PinSource1, GPIO_AF_LCD); //Segments 9 - 12 GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_LCD); //Segments 13 - 15 GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_LCD); //COM 0-3 GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_LCD); GPIO_PinAFConfig(GPIOA, GPIO_PinSource10,GPIO_AF_LCD); GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_LCD);a_opLcdControl->m_iLcdGPIO.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10; a_opLcdControl->m_iLcdGPIO.GPIO_Speed = GPIO_Speed_40MHz; a_opLcdControl->m_iLcdGPIO.GPIO_Mode = GPIO_Mode_AF; a_opLcdControl->m_iLcdGPIO.GPIO_OType = GPIO_OType_PP; a_opLcdControl->m_iLcdGPIO.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &a_opLcdControl->m_iLcdGPIO);
a_opLcdControl->m_iLcdGPIO.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_9 |
GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_Init(GPIOB, &a_opLcdControl->m_iLcdGPIO);a_opLcdControl->m_iLcdGPIO.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7 |
GPIO_Pin_8 | GPIO_Pin_9; GPIO_Init(GPIOC, &a_opLcdControl->m_iLcdGPIO);// LCD_GPIOConfig(); /*!< Configure the LCD Glass GPIO pins */
/*!< Configure the LCD interface -------------------------------------------*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_LCD, ENABLE); /*!< Enable LCD APB1 Clock */ a_opLcdControl->m_iLcdInit.LCD_Prescaler = LCD_Prescaler_8;//LCD_Prescaler_8; a_opLcdControl->m_iLcdInit.LCD_Divider = LCD_Divider_16; a_opLcdControl->m_iLcdInit.LCD_Duty = LCD_Duty_1_4; a_opLcdControl->m_iLcdInit.LCD_Bias = LCD_Bias_1_3; a_opLcdControl->m_iLcdInit.LCD_VoltageSource = LCD_VoltageSource_Internal;//LCD_VoltageSource_External;//LCD_VoltageSource_Internal; LCD_Init(&a_opLcdControl->m_iLcdInit);/*!< Configure the Pulse On Duration */
LCD_PulseOnDurationConfig(LCD_PulseOnDuration_2); /*!< Configure the LCD Contrast (3.51V) */ LCD_ContrastConfig(LCD_Contrast_Level_7);/*!< Wait Until the LCD FCR register is synchronized */
LCD_WaitForSynchro(); /*!< Enable LCD peripheral */ LCD_Cmd(ENABLE); /*!< Wait Until the LCD is enabled */ while(LCD_GetFlagStatus(LCD_FLAG_ENS) == RESET) { } /*!< Wait Until the LCD Booster is ready */ while(LCD_GetFlagStatus(LCD_FLAG_RDY) == RESET) { }LCD_Write(LCD_RAMRegister_0, 0xffffffff);
LCD_UpdateDisplayRequest();
//////////////////////////////////////////////////////////////////////////////////////////////////////////////// Please advise, what wrong ?Thanks,
Moran.2015-04-16 01:35 AM
Did you try to write other LCD RAM registers, I see only a single of them accessed from your code ?
-- Laurent2015-04-16 07:10 AM
Thanks Laurent,
You right. In order to operate all 4 COMs i have to write : LCD_Write(LCD_RAMRegister_0, 0xffffffff); LCD_Write(LCD_RAMRegister_2, 0xffffffff); LCD_Write(LCD_RAMRegister_4, 0xffffffff); LCD_Write(LCD_RAMRegister_6, 0xffffffff); Thanks.