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Serial port and sleep

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Eugeneo

Joined: 30 Aug 2005
Posts: 155
Location: Calgary, AB

Serial port and sleep

Posted: Mon Jun 26, 2006 3:19 pm

How do you turn off the serial usart during sleep. Will this work, the cpu seems to keep resetting.

Sleep code

Code:

temp=input(pin_B2);
temp=input(pin_B5);
VCC_OFF;
PORT_B_PULLUPS(0x01); // one pull up enabled on port B0 ext int for wake
disable_interrupts(INT_TBE); // keep off all serial ports until wake up
disable_interrupts(INT_RDA); // keep off all serial ports until wake up

Wake code

Code:

output_float(pin_B2); //release RX pin form low state
output_float(pin_B5); //release TX pin form low state
PORT_B_PULLUPS(0x01); // one pull up enabled on port B0
enable_interrupts(INT_RDA); // Turn on serial port
enable_interrupts(INT_TBE); // Turn on serial port

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Mon Jun 26, 2006 3:38 pm

Quote:

How do you turn off the serial usart during sleep ?

Do this:

Code:

setup_uart(FALSE);

To turn it back on:

Code:

setup_uart(TRUE);

This is in the manual.
Note that this only works with the hardware UART.

Eugeneo

Joined: 30 Aug 2005
Posts: 155
Location: Calgary, AB


Posted: Mon Jun 26, 2006 3:39 pm

Thank-you

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