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标题: IAR-C编程示例-S3F9454 [打印本页]

作者: yumuzi 时间: 2010-9-1 08:54 标题: IAR-C编程示例-S3F9454

IAR-C编程示例-S3F9454
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产品名称 IAR-C编程示例
使用MCU S3F9454
FOSC = 3.2MHZ
以下示例中很多变量及定义可能并未
用到,在此仅仅作为示范性列示
＃i nclude ioS3C9454.h
＃i nclude intrinsics.h包含内部函数
此处为宏定义替换
#define uchar unsigned char
#define uint  unsigned int
#define nop (__no_operation())       将后者指令行缩写为nop;
#define di  (__disable_interrupt())    将后者指令行缩写为di;
#define ei  (__enable_interrupt())    将后者指令行缩写为ei;
此处定义程序所用到的全局变量
uchar RUNFLAG = 0;
uchar DISPFLAG  = 0;
uchar ERRFLAG = 0;             错误代码标志寄存器
uchar KEY_CODE  = 0;             键扫描码
程序所用函数声明
凡程序中所用到的函数请先在这里声明
__interrupt  void  int_9454();
void chip_init();
void LedScan();

定义9454的SMART OPTION值
003CH,must be initialized to 0
003DH,must be initialized to 0
003EH,enable LVR(2.3V)
003FH,internal RC(3.2MHZ in Vdd=5V)
__code  const  volatile  uchar SmartOption[4] @0x003c = {0x0,0x0,0xe7,0x03};

数码管显示代码定义(在ROM=0X40)
__code  const volatile uchar DigitCode[12] @0x0040 =
{
  0x03, '0'
  0x9f, '1'
  0x25, '2'
  0x0d, '3'
  0x99, '4'
  0x49, '5'
  0x41, '6'
  0x1f, '7'
  0x01, '8'
  0x09, '9'
  0xff, 'A'
  0x61, 'E'
};
========================主程序控制===========================
void main(void)
{
  uint  loop;
  填充系统SMART OPTION
  uchar buffer = SmartOption[0];

  芯片启动初始化过程
  chip_init();
  主循环开始
  while(1)
  {
P2    = 0x00;
以下定时取反P2口输出状态
for(loop=0;loop50;loop++);
P2    = 0xff;
for(loop=0;loop50;loop++);
  }
}
启动时IO初始化子过程
void  chip_init()
{
BTCON = 0xa3;       Watch-dog disable
CLKCON  = 0x18;    selet non-divided CPU clock
P0PND = 0x0;       P0INT disable
P0CONH  = 0xdf;    P0.7 is as AD convert port
                        P0.6 is PWM output
                        P0.5 is as AD convert port
                        P0.4 is as AD convert port
P0CONL  = 0xfa;    P0.3 is as AD convert port
                        P0.2 is as AD convert port
                        P0.0,P0.1 is as push-pull output port
P0 = 0x0;
P1CON = 0xa;       P1.0 is as push-pull output port
                        P1.1 is as push-pull output port
P1 = 0x0;

P2CONH = 0x2a;       P2.0-P2.5 is as push-pull output
P2CONL = 0xaa;       P2.6 is as AD input
P2 = 0x1e;

PWMDATA = 0x0;
PWMCON = 0x5c;       PWM input clock is fosc8,enable PWM output
                        reload from 6 bit coun
T0DATA = 0x32;
T0CON =0x4a;       TMR0 start count,f=fosc256
                        enable TMR0 interrupt4ms
P2 = 0xff;

}
中断向量及服务程序定义
#pragma vector=0x00
__interrupt void int_9454()
{
  T0CON = T0CON & 0xfe;    必须清T0中断标志

  LedScan();             数码管显示扫描过程
}
void  LedScan(void)
{
  这里是LED显示定时扫描过程
}

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