stm32l476液晶驱动的问题

2万 · 2019-9-22 12:04

HAL_LCD_Write(LCD_HandleTypeDef *hlcd, uint32_t RAMRegisterIndex, uint32_t RAMRegisterMask, uint32_t Data)
在库函数中找到上述程序，请问RAMRegisterMask是指我红色标注， Data是指我绿色标注的吗？

2万 · 2019-9-22 12:09

2万 · 2019-9-22 12:14

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

2万 · 2019-9-22 12:19

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;
  }
}

1万 · 2019-9-22 12:22

看原函数的注释，以及这个表的头。

2万 · 2019-9-22 12:25

/**
  * @brief  Write 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
  */