tds6713evm.c

6713音频的代码

#include <csl.h>
#include <csl_mcasp.h>
#include <csl_i2c.h>
#include <csl_emif.h>
#include <csl_pll.h>
#include <TDS6713EVM.h>


//Local software delay function
static void PLLDelay(int Count)
{
    volatile int i = Count;
    while(i--);
}

// Initialize TDS6713EVME board
void TDS6713EVM_init()         
{
// Initialize PLL Registers	
	PLL_bypass();   // Set PLL in bypass
	PLLDelay(20);
	
//Reset PLL
	PLL_reset();
	PLLDelay(20);
	
//Set main multiplier/divisor
 	PLL_RSET(PLLM, 18);                        // 25MHz  x 18 = 450MHz
    PLL_RSET(PLLDIV0, PLL_PLLDIV0_RMK(1, 0));  // 450MHz / 1 = 450MHz
    PLL_RSET(OSCDIV1, PLL_OSCDIV1_RMK(1, 4));  // 25MHz  / 5 = 5Mhz

//Set DSP clock
    PLL_RSET(PLLDIV1, PLL_PLLDIV1_RMK(1, 1));  // 450MHz / 2 = 225MHz
    PLLDelay(20);
    
//Set peripheral clock
    PLL_RSET(PLLDIV2, PLL_PLLDIV2_RMK(1, 2));  // 450MHz / 3 = 150MHz
    PLLDelay(20);
    
//Set EMIF clock
    PLL_RSET(PLLDIV3, PLL_PLLDIV3_RMK(1, 4));  // 450MHz / 5 = 90MHz
    PLLDelay(20);
    
//Take PLL out of reset
    PLL_deassert();
    PLLDelay(1500);
    
//Enalbe PLL
    PLL_enable();
    PLLDelay(20);     	
}


//Spin in a delay loop for delay iterations
void TDS6713EVM_wait(Uint32 delay)
{
  volatile Uint32 i, n;
  n = 0;
  for (i = 0; i < delay; i++)
  {
    n = n + 1;
  }
}