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LM35 is a temperature sensor with analog output. You can connect it to 16F628's AN0 or AN1.
void main(){
init(); //disable interrupts, select analog input in, set tri-status, ans so on
while (1){
delay1ms();
convert(temperature); //convert the temperature at a certain...
if there is no voltage to input, read Parallel port will get 1's,
I would like to get 0's when 5V is present.
connect 5V straight to the port, will not detect if the power supply is absent.
Because reading the parallel port will return 1's value when there is no any circuit.
connect GND...
using gpio as i2c driver
a driver for I2C implementation has been completed. there is a new requirement: to implement an I2C slave with MCU.
any suggestions?
it seems that there is no sample code under pcmcia directory of Linux OS.
they are all pcmcia host driver...while I need a skeleton source code of pcmcia driver.
how to get start to write a pcmcia devide driver,
could anyone help me?
how to expand PCI bus?
As shown as below,
The intention is that Card A is plugged into the PCI slot of PC motherboard;
and, Card B is plugged into the PCI slot of Card A.
Card A is a bridge, also Card B is a bridge.
that is for performing the expansion of PCI bus.
PC-----PCI...
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