MSP432P401R Multiple channel conversion and sending through UART no output in the serial monitor

Hi all! I am trying to read analog signal from 3 pins and send it through UART, however nothing is being printed in the serial monitor. Could you help me and maybe point a mistake in my code?

#include "msp.h"
#include <stdint.h>

int main(void)
{
WDT_A->CTL = WDT_A_CTL_PW | // Stop watchdog timer
WDT_A_CTL_HOLD;

// Configure GPIO
P5->SEL1 |= BIT5 | BIT4 | BIT3; // Enable A/D channel A0-A3
P5->SEL0 |= BIT5 | BIT4 | BIT3;

// Enable global interrupt
__enable_irq();

NVIC->ISER[0] = 1 << ((ADC14_IRQn) & 31);// Enable ADC interrupt in NVIC module

// Turn on ADC14, extend sampling time to avoid overflow of results
ADC14->CTL0 = ADC14_CTL0_ON |
ADC14_CTL0_MSC |
ADC14_CTL0_SHT0__192 |
ADC14_CTL0_SHP |
ADC14_CTL0_CONSEQ_3;

ADC14->MCTL[0] = ADC14_MCTLN_INCH_0; // ref+=AVcc, channel = A0
ADC14->MCTL[1] = ADC14_MCTLN_INCH_1; // ref+=AVcc, channel = A1
ADC14->MCTL[2] = ADC14_MCTLN_INCH_2| // ref+=AVcc, channel = A2, end seq.
ADC14_MCTLN_EOS;

ADC14->IER0 = ADC14_IER0_IE3; // Enable ADC14IFG.3

//configure UART
CS->KEY = CS_KEY_VAL; // Unlock CS module for register access
CS->CTL0 = 0; // Reset tuning parameters
CS->CTL0 = CS_CTL0_DCORSEL_3; // Set DCO to 12MHz (nominal, center of 8-16MHz range)
CS->CTL1 = CS_CTL1_SELA_2 | // Select ACLK = REFO
CS_CTL1_SELS_3 | // SMCLK = DCO
CS_CTL1_SELM_3; // MCLK = DCO
CS->KEY = 0; // Lock CS module from unintended accesses

// Configure UART pins
P1->SEL0 |= BIT2 | BIT3; // set 2-UART pin as secondary function

// Configure UART
EUSCI_A0->CTLW0 |= EUSCI_A_CTLW0_SWRST; // Put eUSCI in reset
EUSCI_A0->CTLW0 = EUSCI_A_CTLW0_SWRST | // Remain eUSCI in reset
EUSCI_B_CTLW0_SSEL__SMCLK; // Configure eUSCI clock source for SMCLK
EUSCI_A0->BRW = 78; // 12000000/16/9600
EUSCI_A0->MCTLW = (2 << EUSCI_A_MCTLW_BRF_OFS) |
EUSCI_A_MCTLW_OS16;

EUSCI_A0->CTLW0 &= ~EUSCI_A_CTLW0_SWRST; // Initialize eUSCI

SCB->SCR &= ~SCB_SCR_SLEEPONEXIT_Msk; // Wake up on exit from ISR

// Ensures SLEEPONEXIT takes effect immediately
__DSB();

while(1)
{
// Start conversion-software trigger
ADC14->CTL0 |= ADC14_CTL0_ENC |
ADC14_CTL0_SC;
__sleep();
__no_operation(); // For debugger
}
}

// ADC14 interrupt service routine
void ADC14_IRQHandler(void)
{
if (ADC14->IFGR0 & ADC14_IFGR0_IFG3)
{
UCA0TXBUF = ADC14->MEM[0];
UCA0TXBUF = ' ';
UCA0TXBUF = ADC14->MEM[1];
UCA0TXBUF = ' ';
UCA0TXBUF = ADC14->MEM[2];
UCA0TXBUF = '\n';

}
}