hi…
i new to work with Rowlet n ARM…
i want to ask how to declare a bit on Rowley…
i have tried like this (i got an examples):
#define DATA IO0PIN_bit.P0_17
but it can’t works…
i want to use P0.17 as input, and i want to make a comparison to it…
if(DATA)
{
…
}
if(!DATA)
{
…
}
anybody can tell me how to declare it??
thx…
#define MY_INPUT (IO0PIN & BIT17)
IO0DIR &=~ BIT17; // set as input
if(MY_INPUT)
{
}
else
{
}
are BIT17 declare like this:
#define BIT17 17
i have tried :
#define MY_INPUT (IO0PIN & BIT17)
IO0DIR &=~ BIT17; // set as input
if(MY_INPUT)
{
}
else
{
}
i give it ‘1’ but it always go to “else” …
did i have to pull up the pin?
thank you
Posted: Tue Mar 11, 2008 5:33 pm Post subject:
are BIT17 declare like this:
#define BIT17 17
i have tried :
#define MY_INPUT (IO0PIN & BIT17)
IO0DIR &=~ BIT17; // set as input
if(MY_INPUT)
{
}
else
{
}
i give it ‘1’ but it always go to “else” …
did i have to pull up the pin?
thank you
seulater Posted: Tue Mar 11, 2008 9:56 am Post subject:
#define MY_INPUT (IO0PIN & BIT17)
IO0DIR &=~ BIT17; // set as input
if(MY_INPUT)
{
}
else
{
}
x-ray Posted: Tue Mar 11, 2008 4:43 am Post subject: how to declare bit on Rowley?
hi…
i new to work with Rowlet n ARM…
i want to ask how to declare a bit on Rowley…
i have tried like this (i got an examples):
#define DATA IO0PIN_bit.P0_17
but it can’t works…
i want to use P0.17 as input, and i want to make a comparison to it…
if(DATA)
{
…
}
if(!DATA)
{
…
}
anybody can tell me how to declare it??
thx…
to use bit 17 u must declare
#define BIT17 (1 << 17 ) /* 0000 0000 0000 0010 0000 0000 0000 0000 */
i have did it too…
#define BIT17 (1<<17)
#define MY_INPUT (IO0PIN&BIT17)
IO0DIR &= ~BIT17
but i give P0.17 input ‘1’(5V) but the condition MY_INPUT =‘1’ never reached. and never go to
if(MY_INPUT){
//never go in here
}
if(!MY_INPUT){
//always go in here
}
#define BIT17 (1<<17)
#define MY_INPUT (IO0PIN&BIT17)
IO0DIR &= ~BIT17
IO0SET |= BIT17
try this
it’s work.
thx all.