TMS320F280039C: #148 declaration incompatible with Union

Part Number: TMS320F280039C
Other Parts Discussed in Thread: SYSCONFIG

#pragma DATA_SECTION(Rdata, "ramgs0");

typedef union {
St_EAdcResults EAdcResults_st[2];
uint32_t EAdcResults_a16;
} Un_EAdcResults;

volatile Un_EAdcResults ADC_Sys_eADCResults_un = {0};

const uint16_t *Rdata = NULL;
ADC_Sys_eADCResults_un.EAdcResults_a16 = (uint32_t *)&Rdata;

I've configured DMA channel for Receiving data from Rxbuff to a variable, Rdata is the variable assigned in sysconfig.
In the Above code I'm trying to assign the Rdata to ADC_Sys_eADCResults_un.EAdcResults_a16;

//*****************************************************************************
//
// DMA Configurations
//
//*****************************************************************************
extern const uint16_t *Rdata;
#define PFC_SPI_RX_DMA_BASE DMA_CH1_BASE
#define PFC_SPI_RX_DMA_BURSTSIZE 2U
#define PFC_SPI_RX_DMA_TRANSFERSIZE 1U
void PFC_SPI_RX_DMA_init();