能不能把具体的计算过程告诉我？

2万 · 2015-2-8 22:14

我现在用的是5502的板子，在板上UARTONCHIP测试程序中，GPT_Config MyGptConfig {0,0,0,0,0,0x56c4,0x0003,0...}函数中的0x56c4,0x0003是怎样计算出来的？能不能把具体的计算过程告诉我？

2万 · 2015-2-8 22:14

#include <stdio.h>

#include <csl.h>

#include <csl_chip.h>

#include <csl_irq.h>

#include <csl_gpt.h>

#include <csl_uart.h>

#include \"Uart_Function.h\"

/* Reference start of interrupt vector table */

/* This symbol is defined in file, vectors.s55 */

extern void VECSTART(void);

/* Function/ISR prototypes */

interrupt void Timer0Isr(void);

/* Create a TIMER_Handle object for use with TIMER_open */

GPT_Handle       hGpt;

Uint16 Counter;

Uint16 EventId0;                // 定时器0所对应的事件ID号

/****************************************************************/

/* Define and initialize the GPT module configuration structure */

/* Input fast peripheral clock is 100MHz                                              */

/* Generate character interval interrupt Note:1etu=1/9600秒       */

/*--------------------------------------------------------------*/

/* 10etu             0x19708             1.042ms                                                             */

/* 12etu             0x1E870             1.250ms                                                             */

/* 14etu             0x239D8             1.459ms                                                             */

/* 20etu             0x32E10             2.084ms                                                             */

/* 40etu             0x65C20             4.168ms                                                             */

/****************************************************************/

GPT_Config  MyGptConfig = {

0,                               //Emulation management register

0,                               //GPIO interrupt control register

0,                                     //GPIO enable register

0,                                     //GPIO direction register

0,                                     //GPIO data register

//0x39D8,                                           //Timer period register 1(主频为200MHz)

//0x0002,                                  //Timer period register 2

0x56C4,                                        //Timer period register 1(主频为300MHz)

0x0003,                               //Timer period register 2

0,                               //Timer period register 3

0，

GPT_GPTCTL1_RMK(                      //Timer control register 1

  GPT_GPTCTL1_TIEN_NOT_GATED,

  GPT_GPTCTL1_CLKSRC_VBUS,

  GPT_GPTCTL1_ENAMODE_CONTINUOUS,

  GPT_GPTCTL1_PWID_INACTIVE_1CYCLE,

  GPT_GPTCTL1_CP_CLOCK_MODE,

  GPT_GPTCTL1_INVIN_DONT_INVERT_OUTPUT,

  GPT_GPTCTL1_INVOUT_DONT_INVERT_OUTPUT

  ,

GPT_GPTCTL2_RMK(                      //Timer control register 2

  GPT_GPTCTL2_TIEN_NOT_GATED,

  GPT_GPTCTL2_CLKSRC_VBUS,

  GPT_GPTCTL2_ENAMODE_CONTINUOUS,

  GPT_GPTCTL2_PWID_INACTIVE_1CYCLE,

  GPT_GPTCTL2_CP_CLOCK_MODE,

  GPT_GPTCTL2_INVIN_DONT_INVERT_OUTPUT,

  GPT_GPTCTL2_INVOUT_DONT_INVERT_OUTPUT

  ,

GPT_GPTGCTL1_RMK(                      //Global timer control register

  GPT_GPTGCTL1_PSC34_DEFAULT,

  GPT_GPTGCTL1_TIMMODE_DEFAULT,

  GPT_GPTGCTL1_TIM34RS_IN_RESET,

  GPT_GPTGCTL1_TIM12RS_IN_RESET



};