In certain situations, my LCD will not power up.
I am using an Infineon XC-888 micro driving a 16x4 LCD in 4-bit mode.
The LCD is based on the ST7066U IC, the c-code is based on the DAvE structure.
LCD Datasheet: www.sitronix.com.tw/.../ST7066Uv22.pdf
I have been playing around with software delays and timing, but in certain situations, the LCD will power up and others not.
Here are my observations so far:
When I re-program the device, there are no problems, it is always when power is removed... and then re-applied. I have previously tried inserting a really long SW delay to give the lcd time to power up, but that doesn't work.
The "line LCD_init4bit();" is in 2 places in the code below, when the one inside the "while(1){...}" loop is removed, it will not power up when power is applied. When the one outside the while loop is removed/commented out, and the one inside enabled, it works. This also leads me to believe that there is nothing wrong with the function itself, but like I previously said, I have already tried long SW delays to give the LCD time to power up.
I am not sure about reset vectors or the compiler, but any suggestions would be muchly appreciated.
Thanks
void main(void) { // USER CODE BEGIN (MAIN_Main,2) // USER CODE END MAIN_vInit(); // USER CODE BEGIN (MAIN_Main,3) //INT_vDisableAll(); setOutputBits(PASS_LED + FAIL_LED); delay(1000); resetOutputBits(FAIL_LED); delay(100); LCD_init4bit(); //INT_vEnableAll(); // USER CODE END while(1) { // USER CODE BEGIN (MAIN_Main,4) LCD_init4bit(); resetOutputBits(PASS_LED); delay(10000); LCD_instruction4bit(CLEAR_DISPLAY); delay(1); LCD_sendstring4bit("Hello World"); delay(1); setOutputBits(PASS_LED); delay(1); // USER CODE END } } // End of function main
"which means???"
That you started to write text just before the page was 100% loaded. Then your browser moved the focus to the "First Name" field, which got augmented.
Happens regularly to me.
You appear as "ISerik malund".
which means???
Ah, so it's intentional. OK.
en.wikipedia.org/wiki/Laurel_and_Hardy
jumpy pages which turned out to be a bad optical mouse
Erik