2 UARTs MSP430FR5994

[rei-vilo]

I'm trying to use 2 UARTs on a MSP430FR5994.

Unfortunately, I am confused when I compare the schematics of the LaunchPad with the pins_energia.h header file.

• MSP430FR5994 slau678a PDF page 34

LP-pin 3 = J1.3 P6.1 MSP-pin 9 LP-pin 4 = J1.4 P6.0 MSP-pin 8

P2.1 RX debug - ezFET MSP-pin 42 P2.0 TX debug - ezFET MSP-pin 43

• MSP430FR5994 pins_energia.h header file

  static const uint8_t DEBUG_UARTRXD = 42;  /* Receive  Data (RXD) at P3.5 */
  static const uint8_t DEBUG_UARTTXD = 41;  /* Transmit Data (TXD) at P3.4 */
  static const uint8_t AUX_UARTRXD = 3;     /* Receive  Data (RXD) at P4.3 */
  static const uint8_t AUX_UARTTXD = 4;     /* Transmit Data (TXD) at P4.2 */

P3.5 = MSP-pin 48
P3.4 = MSP-pin 49
P4.3 = MSP-pin 34
P4.2 = MSP-pin 33

[rei-vilo]

Basic code is

void setup() {
  pinMode(RED_LED, OUTPUT);
  Serial.begin(9600);
  Serial1.begin(9600);
}

void loop() {
  delay(500);
  digitalWrite(RED_LED, 1 - digitalRead(RED_LED));

  Serial.print(millis());
  Serial.println(" Serial");

  Serial1.print(millis());
  Serial1.println(" Serial1");
}

A logic analyser gets nothing from pins 3 / 4.

[rei-vilo]

The exact same code works fine against the MSP430FR5969 LaunchPad.

[StefanSch]

just commited a fix and opened a pull request

[StefanSch]

merged