Posted on December 21, 2016 at 20:37Hello,
We use LCD interface with SM32F4 , with ILITEK 9341.
According to LCD datasheet is it required that CS will be kept active throught several writings of data/control.
But We see that each write of 8-bit word results in changing the CS from IDLE to active and back to IDLE.
Maybe this can explain our failure to make LCD functional.
SRAM configuration:
LCD interface
chip select NE3.
LCD register select: A0
DATA: 8-bit
What can we do to control CS?
I also see the LCD example with STM32F4 demo, which seems to use SSD2119,
and I see that it also make separate write for command and data, so I wander how it works in EVM.
/**
* @brief Writes to the selected LCD register.
* @param LCD_Reg: address of the selected register.
* @param LCD_RegValue: value to write to the selected register.
* @retval None
*/
void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{
/* Write 16-bit Index, then Write Reg */
LCD_CMD = LCD_Reg;
/* Write 16-bit Reg */
LCD_Data = LCD_RegValue;
}
Thank you!
Ran
