SL8051 Los datos de UART están confusos cada pocos intentos

Tengo aproximadamente 1500 muestras almacenadas en la memoria de un ADC en una placa de desarrollo SL8051. Al compilar estos valores en un formulario CSV para enviar a través de UART, la transmisión se realiza aproximadamente 3/5 veces. Las otras veces está completamente confuso. La velocidad en baudios es la misma en ambos lados, y hemos comprobado que el UART enviado sea coherente con otros dispositivos receptores.

Código de adquisición

 //Code to aqcuire from ADC 
    void main (void)
    {
      // unsigned char delay_count;          // Used to implement a delay
      // bit duty_direction = 0;             // 0 = Decrease; 1 = Increase

       // Disable watchdog timer
       WDTCN = 0xde;
       WDTCN = 0xad;

       PORT_Init ();                       // Initialize crossbar and GPIO

        OSCILLATOR_Init ();
       PCA0_Init ();                       // Initialize PCA0
       EMIF_Init ();                        // Storing ADC samples in SRAM 

       SFRPAGE = CONFIG_PAGE;

       RAM_CS = 0;                          // assert SRAM chip select

       UART0_Init ();                       // initialize UART0

       Timer3_Init (SYSCLK/SAMP_RATE);      // Init Timer3 for 100 ksps sample rate

       ADC0_Init ();                        // configure ADC0 and ADC1 for differential measurement

       EA = 1;                             // Globally enable interrupts


        while(1)
        {                           // loop this logic for multiple samples

           while(BB_GPIO_INPUT == 0);

           SFRPAGE = TIMER01_PAGE;
           TR0 = 1;
           DMA0_Init ();                        // configure DMA to move NUM_SAMP samples

           SFRPAGE = UART0_PAGE;
           //printf ("Data Acquisition in progress...\n");

           SFRPAGE = DMA0_PAGE;                 // Switch to DMA0 Page

           while (!(DMA0CN & 0x40));            // Wait for DMA to obtain and move ADC samples

           SFRPAGE = LEGACY_PAGE;
           //printf ("Data Acquisition complete.\n");
           SFRPAGE = TIMER01_PAGE;
           TR0 = 0;
           while(BB_GPIO_INPUT == 0);
           SendData();                          // Send data via the UART0

        }
    }

Código UART

//Code to print the data from DMA   
 void SendData (void)
    {
        unsigned int i;
        char old_SFRPAGE = SFRPAGE;
        SFRPAGE = UART0_PAGE;

        read_ptr = XRAM_START_ADD;   //pointer at beginning of data

        for (i=0; i<NUM_SAMPLES; i++)
        {
            printf("%u",*read_ptr);     // send data as unsigned integers
            putchar(',');
            read_ptr++;
        }
        printf("\n");

        SFRPAGE = old_SFRPAGE;
    }

Inic de UART

void UART0_Init (void)
{
    char old_SFRPAGE = SFRPAGE;

    SFRPAGE = UART0_PAGE;           // Switch to UART0 page

    SCON0 = 0x50;                   // SCON: mode 1, 8-bit UART, enable RX
    SSTA0 = 0x10;                   // Timer 1 generates UART0 baud rate and
                                    // UART0 baud rate divided by two disabled

    SFRPAGE = TIMER01_PAGE;         // Switch to timer 0/1 page

//  TMOD = 0x20;                    // TMOD: timer 1, mode 2, 8-bit reload
    TMOD &= 0x0F;                   // clear all T0 control bits
    TMOD |= 0x20;                   // 8-bit auto-reload timer

    TH1 = -(SYSCLK/BAUDRATE/16);    // set timer 1 reload value for baudrate
    TR1 = 1;                        // start timer1;
    CKCON |= 0x10;                  // Timer1 uses SYSCLK as time base
    PCON |= 0x80;                   // SMOD = 1

    SFRPAGE = UART0_PAGE;           // Switch to UART0 page

    TI0 = 1;                        // indicate TX ready

    SFRPAGE = old_SFRPAGE;          // restore SFRPAGE

}