MSP430F169 on Olimex board.
I have been using the transmit fuction on UART1 for some time and it works fine. Now I need to receive. Both transmit and receive are connected to a PC through a USB PA5 device. I transmit a single byte to port pin 3.7 and can monitor it on my scope. The signal is there but no receive interrupt results.
The set up code is:
mov.b #07Fh, P3DIR ; Set P3 as OUTPUT (except UART rcv)
bis.b #0C0h, P3SEL ; UART1 Transmit/Recieve
bis.b #SWRST, U1CTL ; Disable UART control register
bis.b #010h, U1CTL ; 8 bit data
mov.b #064h, U1BR0 ; 9600 Baud 1 MHz SM clock
mov.b #0, U1BR1 ;
bis.b #02h, U1MCTL ;
bis.b #030h, U1TCTL ; Transmit ctrl reg SM clk
bis.b #030h, ME2 ; Enable UART1 Transmit and Recieve
bis.b #URXIE1, IE2 ; Enable recieve interrupt
bis.b #010h, 01h ; " " "
bic.b #SWRST, U1CTL ; Enable UART control register
The interrupt vector is:
ORG 0FFE6h
DW URCV
URCV: just turns on an LED (or would if it was working)
When I run the set up routine - break - and look at memory, location 01h is supposed to have the UART1 interrupt enable bit set. That byte is always 0. I assume that's the problem - must be doing something wrong.
Thanks,
Tom
