MSP430FR2111: IrDA setup/use for IR based UART communication.

Quinn McHie

Part Number: MSP430FR2111

Hello all,

I am currently trying to get IrDA working on our MSP430FR2111 Microcontroller.

Here is what I am currently doing to setup the UART and IrDA

// Configure eUSCI_A UART module
UCA0CTLW0 = UCSWRST | UCSSEL__SMCLK; // Reset eUSCI
// Set SMCLK as BRCLK source

UCA0BRW = 0x0009; // UCABR1 = 0, UCABR0 = 1
UCA0MCTLW = 0xF701; // UCBRSx = 0x4A, UCBRFx = 1, UCOS16 = 1
UCA0CTLW0 &= ~UCSWRST; // Release eUSCI_A UART module for operation
UCA0IE = UCRXIE; // Enable eUSCI_A RX interrupt

TB0CTL |= TBSSEL__SMCLK | MC__UP | ID__1; // SMCLK, up mode, Input divide by 1

This from what I understand should enable the IrDA Encoder/Decoder and setup the uart to just under 115200 Baud. But when we run the code, we get nothing transmitting out the UART pins.

I cannot find any examples on how the IrDA is supposed to be used/setup.

Any help to get this IrDA mode operational with teh MSP430, that would be awesome.

over 3 years ago

0 Eason Zhou over 3 years ago

TI__Mastermind 39875 points

Hi,

I advice you refer to this TI design:http://www.ti.com/lit/tidu513

Actually, as I know customer would choose to use timer to realize IrDA communication.

Eason

0 Quinn McHie over 3 years ago in reply to Eason Zhou

Prodigy 100 points

The MSP430FR2111 has a decoder and encoder that does all the work of the IrDA communication, but I am missing something that allows that system to work.

0 Eason Zhou over 3 years ago in reply to Quinn McHie

TI__Mastermind 39875 points

You can refer to this document: https://www.ti.com/lit/an/slaa202b/slaa202b.pdf?ts=1647489446737 to teach you how to use IrDA on MSP430.

0 Quinn McHie over 3 years ago in reply to Eason Zhou

Prodigy 100 points

This document explains how to implement the IrDA as if it doesn't have IrDA hardware? THe FR2111 has IrDA hardware, but no examples for how to correctly set up the hardware.