MSP430FR5043: UART configuration

sasi kumar1

I am trying to configure UCA3TXD, UCA3RXD for uart configuration, I am utilizing P4.1 & P4.2 pins for uart configuration but it is not working, and if i utilize P2.0 & P2.1 it is working fine

for setting P4.1 & P4.2 for uart configuration , I tried to configure through all possible combination P4SEL0 = 0x06;P4SEL1 = 0x06;P4SELC = 0x06;

over 4 years ago

0 Allen Gao over 4 years ago

TI__Expert 7080 points

configure as this for multiplexed function.

0 sasi kumar1 over 4 years ago in reply to Allen Gao

Expert 1120 points

Hi Allen,

where is this table available I was not able it find it DATA sheet, how to configure as multiplexed function?

P2SEL1 = 0x03; /* GPIO PIN CONFIGURATION */
UCA3CTLW0 = 0x0081;
UCA3BRW = 0x0068;
UCA3MCTLW = 0xD621;
UCA3CTLW0 = 0x0080;

for this pin configuration it is working fine

P4SELC = 0x06; /* GPIO PIN CONFIGURATION */
UCA3CTLW0 = 0x0081;
UCA3BRW = 0x0068;
UCA3MCTLW = 0xD621;
UCA3CTLW0 = 0x0080;

for this pin configuration it is not working

0 Allen Gao over 4 years ago in reply to sasi kumar1

TI__Expert 7080 points

Hi sasi,

It is in the 9.14.16. Have you checked the waveform of the TX/RX?

0 sasi kumar1 over 4 years ago in reply to Allen Gao

Expert 1120 points

Hi Allen

I am not able to see the waveform

0 Allen Gao over 4 years ago in reply to sasi kumar1

TI__Expert 7080 points

If you are unable to see the waveform of the UART TX/RX pins, how did you judge it didn't work. Through PC to see the data from COMM port?

Could you confirm that the P4.1 P4.2 are connected correctly? That is why I want to check the waveform of the TX/RX to verify whether the data is already sent out. Could you please find some ways to see the waveform or could you please provide the schematic of the pin connection?

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MSP430FR5043: UART configuration