STC SPI 测试程序
照办SPI示例程序,MOSI,SCLK 看不到波形,程序好像死在 while (!(SPSTAT & SPIF)); //wait send complete用的STC12C5608AD
哪里有问题呢? 还需要设置什么吗?
/*------------------------------------------------------------------*/
/* --- STC MCU International Limited -------------------------------*/
/* --- STC 1T Series MCU SPI Demo(1 master and 1 slave) ------------*/
/* --- Mobile: (86)13922805190 -------------------------------------*/
/* --- Fax: 86-755-82944243 ----------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------*/
/* --- Web: www.STCMCU.com -----------------------------------------*/
/* If you want to use the program or the program referenced in the*/
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#include "reg51.h"
//#define MASTER //define:master undefine:slave
#define FOSC 18432000L
#define BAUD (256 - FOSC / 32 / 115200)
typedef unsigned char BYTE;
typedef unsigned int WORD;
typedef unsigned long DWORD;
sfrAUXR = 0x8e; //Auxiliary register
sfr SPSTAT = 0x84; //SPI status register
#define SPIF 0x80 //SPSTAT.7
#define WCOL 0x40 //SPSTAT.6
sfr SPCTL = 0x85; //SPI control register
#define SSIG 0x80 //SPCTL.7
#define SPEN 0x40 //SPCTL.6
#define DORD 0x20 //SPCTL.5
#define MSTR 0x10 //SPCTL.4
#define CPOL 0x08 //SPCTL.3
#define CPHA 0x04 //SPCTL.2
#define SPDHH 0x00 //CPU_CLK/4
#define SPDH 0x01 //CPU_CLK/16
#define SPDL 0x02 //CPU_CLK/64
#define SPDLL 0x03 //CPU_CLK/128
sfr SPDAT = 0x86; //SPI data register
sbit SPISS = P1^3; //SPI slave select, connect to slave' SS(P1.4) pin
void InitUart();
void InitSPI();
void SendUart(BYTE dat); //send data to PC
BYTE RecvUart(); //receive data from PC
BYTE SPISwap(BYTE dat); //swap SPI data between master and slave
///////////////////////////////////////////////////////////
void main()
{ BYTE i;
InitUart(); //initial UART
InitSPI(); //initial SPI
while (1)
{
#ifdef MASTER //for master (receive UART data from PC and send it to slave, in the meantime
// receive SPI data from slave and send it to PC)
// SendUart(SPISwap(RecvUart()));
SPISwap(i++);
#else //for salve (receive SPI data from master and
ACC = SPISwap(ACC); // send previous SPI data to master)
#endif
}
}
///////////////////////////////////////////////////////////
void InitUart()
{
SCON = 0x5a; //set UART mode as 8-bit variable baudrate
TMOD = 0x20; //timer1 as 8-bit auto reload mode
AUXR = 0x40; //timer1 work at 1T mode
TH1 = TL1 = BAUD; //115200 bps
TR1 = 1;
}
///////////////////////////////////////////////////////////
void InitSPI()
{
SPDAT = 0; //initial SPI data
SPSTAT = SPIF | WCOL; //clear SPI status
#ifdef MASTER
SPCTL = SPEN | MSTR; //master mode
#else
SPCTL = SPEN; //slave mode
#endif
}
///////////////////////////////////////////////////////////
void SendUart(BYTE dat)
{
while (!TI); //wait pre-data sent
TI = 0; //clear TI flag
SBUF = dat; //send current data
}
///////////////////////////////////////////////////////////
BYTE RecvUart()
{
while (!RI); //wait receive complete
RI = 0; //clear RI flag
return SBUF; //return receive data
}
///////////////////////////////////////////////////////////
BYTE SPISwap(BYTE dat)
{
#ifdef MASTER
SPISS = 0; //pull low slave SS
#endif
SPDAT = dat; //trigger SPI send
while (!(SPSTAT & SPIF)); //wait send complete
SPSTAT = SPIF | WCOL; //clear SPI status
#ifdef MASTER
SPISS = 1; //push high slave SS
#endif
return SPDAT; //return received SPI data
} 把老妖的程序直接复制应用的结果。他的程序是目前在从机他咋会有输出呢?得让他在主机状态。 #define MASTER改了,已经是主机模式,还是不行 SPI寄存器回复【楼主位】rayt
-----------------------------------------------------------------------
SPI寄存器地址定义错误,
sfrAUXR = 0x8e; //Auxiliary register
sfr SPCTL = 0xce; //SPI control register
sfr SPDAT = 0xcf; //SPI data register
sfr SPSTAT = 0xcd; //SPI status register
sbit SPISS = P1^3; //SPI slave select, connect to slave' SS(P1.4) pin
你重新下载一下芯片手册! 标记 老妖就是TMD的国产人,天天讲每个人在某方面做的好中国就强大
呀手册错了也不会出个堪误报告,天天意淫世界第一,不过人家的一个过期专利。
人家可以搞定的东西你搞不定,你搞的定的东西人家必定搞的定。这就是你的破51啦。 回复【5楼】huike
-----------------------------------------------------------------------
有同感 正在主从连接,不通,发送a 接收00,有哪位大侠帮助解决,谢谢!!!! 新的datashit里改了,但是新的ISP下载程序里提供复制的代码却没改!!!折腾了好久才发现……
页:
[1]