/********************************************************
*
* 北京四维卓信电子有限公司
*
* 【OpenADSP开源社区】
*
********************************************************/
#include <cdefBF518.h>
#include <ccblkfn.h>
#include "cpld.h"
unsigned char buff_w[512];
unsigned char buff_r[512];
void Init_SDRAM(void)
{
*pEBIU_SDRRC = 0x00000817;
*pEBIU_SDBCTL = 0x00000025;
*pEBIU_SDGCTL = 0x0091998d;
ssync();
}
void Init_EBIU(void)
{
*pEBIU_AMBCTL0 = 0x7bb07bb0;
*pEBIU_AMBCTL1 = 0xffc07bb0;
*pEBIU_AMGCTL = 0x000f;
}
void Set_PLL(int pmsel,int pssel)
{
int new_PLL_CTL;
*pPLL_DIV = pssel;
asm("ssync;");
new_PLL_CTL = (pmsel & 0x3f) << 9;
*pSIC_IWR |= 0xffffffff;
if (new_PLL_CTL != *pPLL_CTL)
{
*pPLL_CTL = new_PLL_CTL;
asm("ssync;");
asm("idle;");
}
}
void init_port(void)
{
*pPORTF_FER |= PF7;
*pPORTF_MUX = 0;
*pPORTG_FER |= PG12|PG13|PG14|PG15;
*pPORTG_MUX = 0 ;
*pPORTG_FER |= PG11;
*pPORTG_MUX |= (1<<12);
ssync();
}
void SPI_init(void)
{
*pSPI0_BAUD= 2; //配置速率为1/4系统时钟 SPI速率 = SCLK/2*SPI_BAUD
*pSPI0_FLG |=FLS1; //选择SPI0SEL2接口
*pSPI0_CTL = 0x1001|CPHA| CPOL|EMISO; //配置模式为手动片选模式
*pSPI0_CTL = (*pSPI0_CTL | SPE); //使能SPI0接口
}
void delay(void)
{
int i;
for(i=0;i<100000;i++);
}
int main()
{
int i;
Set_PLL(16,4);
Init_EBIU();
init_port();
*pDEVICE_OE |= PPI_SET0;
*pDEVICE_OE |= PPI_SET1;
SPI_init();
while(1)
{
*pSPI0_FLG &= ~FLG1; //将SPI0SEL2拉到0
while(!(*pSPI0_STAT & SPIF)); //查看SPI0传输状态是否完成
*pSPI0_TDBR = 0xff; //将数据送入SPI传输数据寄存器
while(*pSPI0_STAT & RXS) //查看SPI0传输状态是否有数据需要接收
i = *pSPI0_RDBR; //读取数据
*pSPI0_FLG |= FLG1;
delay();
}
while(1);
}
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