TCA9539 often crash....
I use two IO to simulate i2c protocol to make TCA9539 output 1 and 0 interval 2 seconds in P0 and P1 with LED.
P0---LED 1 0 1 0.....
P1---LED 0 1 0 1....
after 2 or 3 hours ， the TCA9539 crash, not work. ALL P0 and P1 are 0, LED extinguished. I must reset it manually.
So, TCA9539 is unstable? or how can I prevent it crash?
while(1)
{
if( ucP0 == 0xffu )
{
ucP0 = 0x00u;
T9539_WritePort(TCA9539_ADDRESS, T9539_REG_OUT_P0, 0x00u ); //dark
T9539_WritePort(TCA9539_ADDRESS, T9539_REG_OUT_P1, 0xffu ); //light
}
else
{
ucP0 = 0xffu;
T9539_WritePort(TCA9539_ADDRESS, T9539_REG_OUT_P0, 0xffu ); //ligh
T9539_WritePort(TCA9539_ADDRESS, T9539_REG_OUT_P1, 0x00u ); //dark
}
delay_ms(2000); //delay 2 Seconds
}
very simple programe。P0 dark when P1 light---》delay 2 S -》P0 light and P1 dark。。。
run for about 3-4 hours。。 two leds dark， must reset chip。 and then P0 and P1 light/dark/cycle...
