Tool/software: Code Composer Studio
Hi,
I started a program using CCS7 and the MSP430FR5949DA and ran into a strange init behaviour.
If I init port PJ, PJ.4 and PJ.5 seem to stay stuck in LFXT mode in that PJ.4 sits at roughly 1/2 DVCC and PJ.5 is stuck to ground.
Below my init code for the clock registers and the PJ port.
If I toggle all outputs of port PJ, PJ.0-PJ.3 switch as expected but PJ.4 and PJ.5 stay at 1/2Vcc and ground.
Am I overlooking a setting to disable the LFXT oscillator setting here?
*
* Clock System Registers:
*/
CSCTL0 = CSKEY; // enable Clock System register access
CSCTL1 = DCOFSEL_6; // select DCO to run at 8MHz, DCORSEL = 0.
CSCTL2 = SELM__DCOCLK | SELS__DCOCLK | SELA__VLOCLK; // MCLK and SMCLK derived from DCOCLK, ACLK derived from 10KHz VLOCLK
CSCTL3 = 0; // MCLK = 8MHz, SCLK = 8MHz, ACLK = 10KHz
CSCTL4 = LFXTOFF;
CSCTL0_H = 0; // disable Clock System register access
/*
* Port PJ
*/
PJDIR = 0xFF; // all are outputs
PJSEL0 = 0;
PJSEL1 = 0; // just IO, no alternate function on port P3
PJOUT = 0xFF; // LED is off
while(1)
{
PJOUT = 0xFF;
PJOUT = 0;
}
