From: [email protected]
To: [email protected]
Subject: LogWrite and interruptions
Date: Thu, 13 Aug 2009 16:59:21 -0400
Hi, i am working with LogStorage implementation of tinyos 2.1 using Tmote Sky
plataform, i need to enabling interruption of ADC when i am writing a log,
checking the code of the implementation i found that the bloking code of the
interruption is here:
void continueOp()
{
uint8_t end;
uint8_t tmp;
atomic
{
call Usart.tx( m_tx_buf ? m_tx_buf[ m_pos ] : 0 );
end = m_pos + SPI_ATOMIC_SIZE;
if ( end > m_len )
end = m_len;
while ( ++m_pos < end )
{
while( !call Usart.isRxIntrPending() );
tmp = call Usart.rx();
if ( m_rx_buf )
m_rx_buf[ m_pos - 1 ] = tmp;
call Usart.tx( m_tx_buf ? m_tx_buf[ m_pos ] : 0 );
}
}
}
This fragment of code belong to the Msp430SpiNoDmaP.nc archive, cheking the
code i think (i am not sure) that its blocking to avoid the radio to take
control of the usart (i read in somewhere that flash and radio used the same
usart port), its safe to make this code no-blocking or i have to considerate
some restriccion (like disable the radio before using the log write or
something else)
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