iar-

IAR_example_EasyARM8962.zip

/****************************************Copyright (c)****************************************************
**                            Guangzhou ZHIYUAN electronics Co.,LTD.
**                                      
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:               spi_t_r.c
** Latest modified Date:    2007.09.16
** Latest Version:          v1.0
** Descriptions:            通过 SSI 接口循环向外输出 0~F 的字模，74HC595 接收到 SSI 信号以后
**                          在八段数码管上显示相应的字符。
**
**--------------------------------------------------------------------------------------------------------
** Created by:              Zhao shimin
** Created date:            2007.09.16
** Version:                 v1.0
** Descriptions:            The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             Kang qinhua
** Modified date:           2008.01.13
** Version:                 v1.1
** Descriptions:            
**
*********************************************************************************************************/

/*  调用库函数的头文件　　*/
#include "hw_memmap.h"
#include "hw_types.h"
#include "ssi.h"
#include "gpio.h"
#include "sysctl.h"
#include "systick.h"
  
#define BitRate     115200                                              /*  设定波特率                  */
#define DataWidth   8                                                   /*  设定数据宽度                */

/* 此表为7段数码管显示0~F的字模       */
unsigned char DISP_TAB[16] = {
    0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
    0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E};
/*********************************************************************************************************
** Function name:           delay
**
** Descriptions:            延时函数，输入参数越大，延时时间越长
**
** input parameters:        uld    延时时间值
** output parameters:       NONE
**                          
** Returned value:          NONE
**
** Created by:              Zhao shimin
** Created Date:            2007/09/16
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void delay (unsigned long uld)
{
  for(; uld; uld--);
}
/*********************************************************************************************************
** Function name:           main
**
** Descriptions:            设置SSI，并从SPI接口输出0－F的字模数据到数码管上显示
**
** input parameters:        NONE
** output parameters:       NONE
**                          
** Returned value:          NONE
**
** Created by:              Zhao shimin
** Created Date:            2007/09/16
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
int main (void)
{
  unsigned char i = 0;
  
  SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI);                            /*　为SSI提供时钟　             */
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);                          /*  为GPIOA端口提供时钟         */

  /*  设置SPI为主机模式0,8位数据宽度，115200的波特率　　　　 */
  SSIConfig(SSI_BASE, SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, BitRate, DataWidth);
  SSIEnable(SSI_BASE);                                                  /*  使能SPI                     */

  /* 设定 GPIO A 2~5 引脚为使用外设功能                     */
  GPIOPinTypeSSI(GPIO_PORTA_BASE, 
				(GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5));
	                               

  while (1) {
    for (i=0; i<16; i++) {
         SSIDataPut(SSI_BASE, DISP_TAB[i]);                             /*  循环输出0－F的字模　　　　　*/
         delay(1000000);	      
    }
  }
}
/*********************************************************************************************************
  END FILE
*********************************************************************************************************/