最近参加ADI的UDC（University Design Competition）比赛，调试触摸屏，用的是BF533，调试SPI调试了半天，问亿旗，只是搪塞回答了一下，后来问中国ADI的DSP技术支持，他们还在开发板上调试了我的代码，真负责，原来是我没有加ssync();这条语句。
不过，现在触摸屏还是有问题，BF533不能和它通信目前。

//** file: spi.h //** target: ADSP-BF533 //** creat time: 2008-8-19 #ifndef _SPI_H #define _SPI_H #define SPI_SEL_LOW *pSPI_FLG &= ~0x2000 // SPISEL5 clr #define SPI_SEL_HIGH *pSPI_FLG |= 0x2000 // SPISEL5 set //SPI interface funtion void SPI_Init(void); //SPI send a word function void SPI_send_data(unsigned short data); //SPI receive a word function unsigned short SPI_receive_data(void); #endif //** file: spi.c //** target: ADSP-BF533 //** creat time: 2008-8-19 #include <ccblkfn.h> #include <cdefBF533.h> #include "sys_func.h" //SPI interface funtion void SPI_Init(void) { *pSPI_BAUD = (unsigned short)(GetSCLK() / (2 * 10000000)); // 5MHz //SPI enable,master mode,CPHA=1(control by software), //16 bit,Start transfer with write of SPI_TDBR *pSPI_CTL = 0x5501; *pSPI_FLG = 0xFF20; // SPISEL5 enabled } //SPI send a word function void SPI_send_data(unsigned short data) { *pSPI_TDBR = data; while ((*pSPI_STAT & 0x0001) == 0) ; } //SPI receive a word function unsigned short SPI_receive_data(void) { SPI_send_data(0xFFFF); return (*pSPI_RDBR); }