下面是主程序。。。。
#include "in430.h"
#include "CH376INC.h"
#include "msp430x14x.h"
#include "functions.h"
#include "Boardconfig.h"
uchar buf[20];
void int_usart();
void sent_byte(unsigned char data);
void main( void )
{
// Stop watchdog timer to prevent time out reset
WDTCTL = WDTPW + WDTHOLD;
uchar s;
uchar i;
BoardConfig(0xf0);
initsys();
initspi();
initport();
int_usart();
CH376_SPI_RST_1;
Delayms( 20 );
CH376_SPI_RST_0;
Delayms( 100 );
s=mInitCH376Host();
mStopIfError(s);
while(1)
{
while ( CH376_DiskConnect()!= USB_INT_SUCCESS ) /* 检查U盘是否连接,等待U盘插入,对于SD卡,可以由单片机直接查询SD卡座的插拔状态引脚 */
{
Delayms( 100 );
}
//Delayms( 200 );
for ( i = 0; i < 100; i ++ )
{
Delayms( 50 );
s = CH376_DiskMount( ); /* 初始化磁盘并测试磁盘是否就绪 */
if ( s == USB_INT_SUCCESS ) /* 准备好 */
{
P2OUT&=~BIT4;//成功亮D5
break;
}
else if ( s == ERR_DISK_DISCON ) /* 检测到断开,重新检测并计时 */
{
break;
}
if ( CH376_GetDiskStatus( ) >= DEF_DISK_MOUNTED && i >= 5 ) /* 有的U盘总是返回未准备好,不过可以忽略,只要其建立连接MOUNTED且尝试5*50mS */
{
break;
}
}
if ( s == ERR_DISK_DISCON ) /* 检测到断开,重新检测并计时 */
{
continue;
}
if ( CH376_GetDiskStatus( ) < DEF_DISK_MOUNTED ) /* 未知USB设备,例如USB键盘、打印机等 */
{
goto UnknownUsbDevice;
}
UnknownUsbDevice:
while ( CH376_DiskConnect( )==USB_INT_SUCCESS ) /* 检查U盘是否连接,等待U盘拔出 */
{
Delayms( 100 );
}
}
}
void int_usart()
{
U0CTL|=SWRST;//复位串口
U0CTL|=CHAR; //8位数据
U0TCTL|=SSEL1;//select SMCLK AS CLK
//U0BR0=0Xa0;
//U0BR1=0X01;
//UMCTL0=0Xc0;//19200
U0BR0 = 0x45;
U0BR1 = 0x00;
U0MCTL = 0x00; //115200
ME1|=UTXE0;//使能接收和发送
U0CTL&=~SWRST;//
//IE1|=URXIE0;//使能接收中断
//P3SEL|=BIT4;
//P3SEL|=BIT5;//选择I/O口使用扩展功能
P3SEL |= 0x30;
P3DIR |= BIT4;
}
void sent_byte(unsigned char data)
{
while((IFG1&UTXIFG0)==0);//判断发送缓冲区是否结束
U0TXBUF=data;
}
#include "functions.h"
#include "msp430x14x.h"
#include "CH376INC.h"
void initsys(void)//system clock
{
uchar i;
BCSCTL1&=~XT2OFF;
do
{
IFG1 &= ~OFIFG;
for (i = 0xFF; i > 0; i--);
}
while ((IFG1 & OFIFG) != 0);
BCSCTL2|=SELM1+SELS;
}
void initspi(void)
{
U1CTL = SWRST; // 8-bit SPI Master **SWRST**
U1CTL = CHAR | SYNC | MM; // 8-bit SPI Master **SWRST**
U1TCTL = SSEL1 | SSEL0 | STC; // SMCLK, 3-pin mode, clock idle low, data valid on rising edge, UCLK delayed
U1TCTL &= ~CKPH;//UCLK延时半个周期作为SPI时钟,时钟低电平为无效信号,上升沿锁存数据
U1TCTL &= ~CKPL;
U1BR0 = 0x04; // 0x02: UCLK/2 (4 MHz), works also with 3 and 4
U1BR1 = 0x00;
U1MCTL = 0x00;
U1CTL &= ~SWRST; // clear SWRST
IE2 &=~UTXIE1;
IE2 &=~URXIE1;
ME2|= USPIE1; // Enable USART1 SPI mode
}
void initport(void)
{
//spi
P5DIR|=BIT0+BIT1+BIT3; //设置端口方向
P5SEL|=BIT1+BIT2+BIT3; //设置功能
//others
P2DIR|=0xff;
P2DIR&=~BIT7;
P2DIR&=~BIT1;
P2IE|=BIT7;
P2IES|=0x00;
P2OUT|=BIT0+BIT2+BIT3+BIT4+BIT5+BIT6;
_EINT();
}
uchar mInitCH376Host( void )
{ //_DINT();
uchar res;
//CH376_SPI_SCS_1;
SPI_Write_CMD( CMD_CHECK_EXIST ); /* 测试单片机与CH376之间的通讯接口 */
SPI_Write_Byte( 0x55 );
res=SPI_Read_Byte( );
CH376_SPI_SCS_1;
//Delayus(100);
if ( res != 0xAA )
// P2OUT&=~BIT5;
return( ERR_USB_UNKNOWN );/* 通讯接口不正常,可能原因有:接口连接异常,其它设备影响(片选不唯一),串口波特率,一直在复位,晶振不工作 */
SPI_Write_CMD( CMD11_SET_USB_MODE );
// P2OUT&=~BIT4;
/* while(1);
{P2OUT&=~BIT5;
Delayms(1000);
P2OUT|=BIT5;
Delayms(1000);}*//* 设备USB工作模式 */
SPI_Write_Byte( 0x06 );
//P2OUT&=~BIT4;
Delayus( 20 );
res = SPI_Read_Byte( );
CH376_SPI_SCS_1;
#ifndef CH376_SPI_INT
#ifdef //CH376_SPI_SDO
//SPI_Write_CMD( CMD20_SET_SDO_INT ); /* 设置SPI的SDO引脚的中断方式 */
SPI_Write_Byte( 0x16 );
SPI_Write_Byte( 0x90 ); /* SDO引脚在SCS片选无效时兼做中断请求输出 */
CH376_SPI_SCS_1;
#endif
#endif
if ( res == CMD_RET_SUCCESS )
{
return( USB_INT_SUCCESS );
}
else
{
return( ERR_USB_UNKNOWN ); /* 设置模式错误 */
}
}
void Delayus(uint US)
{
uint i;
US=US*5/4; // 5/4是在8MHz晶振下，通过软件仿真反复实验得到的数值
for( i=0;i<US;i++);
}
void Delayms(uint MS)
{
uint i,j;
for(i=0;i<MS;i++);
for(j=0;j<1141;j++); // 1141是在8MHz晶振下，通过软件仿真反复实验得到的数值
}
uchar SPI_Read_Byte()
{
uchar rByte;
while((IFG2&URXIFG1)==0);
rByte=U1RXBUF;
return rByte;
}
void SPI_Write_Byte(uchar wByte)
{
U1TXBUF=wByte;
while((IFG2&UTXIFG1)==0); // 等待发送完成
}
void SPI_Write_CMD( uchar mCmd )
{
#ifdef CH376_SPI_BZ
uchar i;
#endif
CH376_SPI_SCS_1; /* 防止之前未通过xEndCH376Cmd禁止SPI片选 */
Delayus(5);
CH376_SPI_SCS_0; /* SPI片选有效 */
SPI_Write_Byte( mCmd ); /* 发出命令码 */
#ifdef CH376_SPI_BZ
// if
for ( i = 30; i != 0 && CH376_SPI_BZ; -- i ); /* SPI忙状态查询,等待CH376不忙,或者下面一行的延时1.5uS代替 */
#else
// else
//{
Delayus(5);
Delayus(5);
Delayus(5);
// )
#endif
}
/*******************************************************************************
* 函 数 名 : CH376_Read_Var8
* 描 述 : 读CH376芯片内部的8位变量.
*******************************************************************************/
uchar CH376_Read_Var8( uchar var )
{
uchar c0;
SPI_Write_CMD( CMD11_READ_VAR8 ); /* 读取指定的8位文件系统变量 */
SPI_Write_Byte( var );
c0 = SPI_Read_Byte( );
CH376_SPI_SCS_1;
return( c0 );
}
/*******************************************************************************
* 函 数 名 : CH376_Read_Block
* 描 述 : 从当前主机端点的接收缓冲区读取数据块,.
*******************************************************************************/
uchar CH376_Read_Block(uchar *buf)
{
uchar status, len;
SPI_Write_CMD( CMD01_RD_USB_DATA0 );
status = len = SPI_Read_Byte( ); // 长度
if ( len ) {
do {
*buf = SPI_Read_Byte( );
buf ++;
} while ( -- len );
}
CH376_SPI_SCS_1;
return( status );
}
/////////////////////////////////////////////
uchar CH376_DiskMount( void )
{
return( CH376_SendCmd_WaitInt( CMD0H_DISK_MOUNT ) );/* 初始化磁盘并测试磁盘是否就绪 */
}
uchar Query376Interrupt( void )
{
#ifdef CH376_SPI_INT
return( CH376_SPI_INT ? FALSE : TRUE ); /* 如果连接了CH376的中断引脚则直接查询中断引脚 */
//#else
//return( CH376_SPI_SDO ? FALSE : TRUE ); /* 如果未连接CH376的中断引脚则查询兼做中断输出的SDO引脚状态 */
#endif
}
void mStopIfError( uchar iError )
{
if ( iError == USB_INT_SUCCESS )
{
P2OUT&=~BIT2;
}
else
{
P2OUT&=~BIT3;
}
}
uchar CH376_SendCmd_WaitInt( uchar mCmd )
{
SPI_Write_CMD( mCmd );
CH376_SPI_SCS_1;
return( Wait376Interrupt( ) );
}
#ifndef NO_DEFAULT_CH376_INT//用于禁止默认的Wait376Interrupt子程序,禁止后,应用程序必须自行定义一个同名子程序
uchar Wait376Interrupt( void )
{
#ifdef DEF_INT_TIMEOUT /* 是否定义了超时时间 */
#if DEF_INT_TIMEOUT < 1 /* 没有定义 */
while ( Query376Interrupt() == FALSE ); /* 一直等中断 */
return( CH376_GetIntStatus() ); /* 检测到中断 */
#else /* 定义了超时时间 */
UINT32 i;
for ( i = 0; i < DEF_INT_TIMEOUT; i ++ ) /* 计数防止超时 */
{
if ( Query376Interrupt( ) )
{
return( CH376_GetIntStatus( ) ); /* 检测到中断 */
}
}
return( ERR_USB_UNKNOWN ); /* 不应该发生的情况 */
#endif
#else
UINT32 i;
for ( i = 0; i < 5000000; i ++ ) /* 计数防止超时,默认的超时时间,与单片机主频有关 */
{
if ( Query376Interrupt( ) )
{
return( CH376_GetIntStatus( ) );
}
/* 在等待CH376中断的过程中,可以做些需要及时处理的其它事情 */
}
return( ERR_USB_UNKNOWN ); /* 不应该发生的情况 */
#endif
}
#endif
uchar CH376_GetIntStatus( void )
{
uchar status2;
SPI_Write_CMD( CMD01_GET_STATUS );
status2 = SPI_Read_Byte( );
CH376_SPI_SCS_1;
return( status2 );
}
uchar CH376_GetDiskStatus( void )
{
return( CH376_Read_Var8( VAR_DISK_STATUS ) );
}
uchar CH376_DiskConnect( void )
{
if ( Query376Interrupt( ) )
{
CH376_GetIntStatus( ); /* 检测到中断 */
}
return( CH376_SendCmd_WaitInt( CMD0H_DISK_CONNECT ) ); /* 检查磁盘是否连接 */
}
uchar mInitCH376Host( void )函数 中SPI_WRITE_BYTE()写入0x55 返回值res=SPI_Read_Byte( )=0X06 |
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