STM8L的LCD调试时不亮

yq922 提问时间：2020-10-17 17:45 /

问答
是否解决:

STM8L052驱动LCD字段屏，烧录成功程序后上电复位LCD屏能显示，但是在DEBUG时LCD屏不亮。用万用表测量，DEBUG模式SEG和COM口之间没有压差，上电复位正常显示时压差在1V左右。

DEBUG模式没有打断点，直接全速运行。
求各位大佬指教！！！！！

附程序如下：
void main(void)
{

GPIO_Init(GPIOD,GPIO_Pin_5,GPIO_Mode_Out_PP_Low_Fast);
GPIO_SetBits(GPIOD,GPIO_Pin_5);

  /* Configures the LCD GLASS relative GPIO port IOs and LCD peripheral */
    LCD_GLASS_Init();

  /* Enable RTC clock */
    CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE);
#if 1
  /* Configures the RTC */
    RTC_WakeUpClockConfig(RTC_WakeUpClock_CK_SPRE_16bits);
    RTC_ITConfig(RTC_IT_WUT, ENABLE);

  /* Enable general Interrupt*/
    enableInterrupts();
#endif
LCD->RAM[LCD_RAMRegister_0] =  0x00;
LCD->RAM[LCD_RAMRegister_0] =  0xff;
LCD->RAM[LCD_RAMRegister_1] =  0x00;
LCD->RAM[LCD_RAMRegister_1] =  0xff;
LCD->RAM[LCD_RAMRegister_2] =  0x00;
LCD->RAM[LCD_RAMRegister_2] =  0xff;
LCD->RAM[LCD_RAMRegister_3] =  0x00;
LCD->RAM[LCD_RAMRegister_3] =  0xff;
LCD->RAM[LCD_RAMRegister_4] =  0x00;
LCD->RAM[LCD_RAMRegister_4] =  0xff;
LCD->RAM[LCD_RAMRegister_5] =  0x00;
LCD->RAM[LCD_RAMRegister_5] =  0xff;

  while (1)
  {
   LCD->RAM[LCD_RAMRegister_0] =  0x00;
   LCD->RAM[LCD_RAMRegister_0] =  0xff;
  }
}

/**
  * @brief  Configures the LCD GLASS relative GPIO port IOs and LCD peripheral.
  * @param  None
  * @retval None
  */
void LCD_GLASS_Init(void)
{

  /*
The LCD is configured as follow:
   - clock source = LSE (32.768 KHz)
   - Voltage source = Internal
   - Prescaler = 2
   - Divider = 18 (16 + 2)
   - Mode = 1/4 Duty, 1/3 Bias
   - LCD frequency = (clock source * Duty) / (Prescaler * Divider)
                  = 228 Hz ==> Frame frequency = 57 Hz */

// CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE);
/* Enable LCD clock */
CLK_PeripheralClockConfig(CLK_Peripheral_LCD, ENABLE);
CLK_RTCClockConfig(CLK_RTCCLKSource_LSE, CLK_RTCCLKDiv_1);

LCD_DeInit();
/* Initialize the LCD */
LCD_Init(LCD_Prescaler_2, LCD_Divider_18, LCD_Duty_1_4,
   LCD_Bias_1_2, LCD_VoltageSource_External);//LCD_VoltageSource_InternalLCD_VoltageSource_External

/* Mask register*/
LCD_PortMaskConfig(LCD_PortMaskRegister_0, 0xFF);
LCD_PortMaskConfig(LCD_PortMaskRegister_1, 0x00);
LCD_PortMaskConfig(LCD_PortMaskRegister_2, 0x00);
LCD_PortMaskConfig(LCD_PortMaskRegister_3, 0x00);

LCD_ContrastConfig(LCD_Contrast_Level_7);
LCD_DeadTimeConfig(LCD_DeadTime_0);
LCD_PulseOnDurationConfig(LCD_PulseOnDuration_1);
// Delay_Ms(80);
LCD_Cmd(ENABLE); /*!< Enable LCD peripheral */
}