Hello everyone
I'm working on a project were I want to use the USCIA1 in UART mode to send some information to a pi.
Sending and receiving should be done by interrupts but this didn't work.
While debugging I noticed that the UCA1RXIE / UCA1TXIE are never set and the UCSWRST bit is never cleared. Going through the code step by step the microcontroller seams to just ignore the those lines, meaning that the debugger showes that the registers are unchanged afterwards.
The compiler is set to no optimisations and the lines seem to be executed but don't have any effect.
Following is the in my opinion relevant part of the code:
//initialize RX setValue(&gUartRx, false); //sets pin to 0 setMode(&gUartRx, special); //sets pin mode to use for peripheral //initialize TX setValue(&gUartTx, false); //sets pin to 0 setMode(&gUartTx, special); //sets pin mode to use for peripheral //configure UART UCA1CTL1 |= UCSWRST; //allready set UCA1CTL1 |= UCSSEL_2; //set USCI Clock 1 for UART (SMCLK) UCA1BR0 = 0x08; //baud-rate low-byte (115200 baud) UCA1BR1 = 0x00; //baud-rate high-byte UCA1MCTL = UCBRF_11 | UCOS16; //modulation 11 , oversampling*/ UCA0CTL1 &= ~UCSWRST; //enable UART //does not work UC1IE |= UCA1RXIE; //enable read interrupt //does not work }
the comments further right are supposed to clarify the lines I have problems with.
The main clock is set to 16MHz
_EINT() is set in a prior function.
I hope someone is able to help me.
Best regards
Matthias
