Part Number: TDC1000-TDC7200EVM
Hi everyone:
We are using the TDC1000-TDC7200EVM in conjunction with an arduino to send the ultrasound readings to a remote end.
The connection is easy: the UART pin of the TDC1000-TDC7200EVM board is connected to a serial pin on an arduino mega, and every info that is received by the arduino is sent using a wireless module.
I am able to do so if I have the TDC1000-TDC7200EVM connected to the computer, but whenever I disconnected the board it stops reading and sending the info. And I need that because I want to leave it installed on some pipe for testing.
I tried to modify the firmware that comes with the TDC1000-TDC7200EVM board, but the results are not that great.
What I did was to leverage the bext_trigger_time int used in main.c
next_trigger_time = 0;
while (1)
{
// __bis_SR_register(LPM0_bits + GIE); // Enter LPM0, enable interrupts
__no_operation(); // For debugger
USBCommunicationTask();
if (next_trigger_time)
{
next_trigger_time = 0;
if (TDC1000_MSP430Timer_TDC)
MSP430Timer_tdc_trigger_measure();
else
tdc_trigger_measure();
__no_operation(); // For debugger
}
}
I realized that the timer Timer1 has the interrupt service routine that sets that value (timer_queue.c, line 240). Therefore I decided to check hw the timer is init. This line appears on the init:
TA1CCR0 = INTERVAL_100ms;
Can I just change that value to the number of seconds I want my ultrasound to trigger a measurement every 30 secs? I also set the continuous_trigger_state variable to 1 for this.
The problem I am having is that if I disconnect the USB the triggering is not performed afterwards.
Any other change I should do for this to work?
