#define?SIZE?100?
unsigned?char?SPI_rx_buff[SIZE];?
unsigned?char?SPI_tx_buff[SIZE];?
unsigned?char?rx_wr_indexrx_rd_indexrx_counterrx_buffer_overflow;?
unsigned?char?tx_wr_indextx_rd_indextx_counter;?

#pragma?interrupt_handler?spi_stc_isr:18?
void?spi_stc_isr（void）?
{?
??SPI_rx_buff[rx_wr_index]?=?SPDR;?//從ISP口讀出收到的字節?
??if?（++rx_wr_index?==?SIZE）?rx_wr_index?=?0;?//放入接收緩沖區，并調整隊列指針?
??if?（++rx_counter?==?SIZE）?
????{?
??????rx_counter?=?0;?
??????rx_buffer_overflow?=?1;?
????}?
??if?（tx_counter）?//如果發送緩沖區中有待發的數據?
????{?
??????--tx_counter;?
??????SPDR?=?SPI_tx_buff[tx_rd_index];?//發送一個字節數據，并調整指針?
??????if?（++tx_rd_index?==?SIZE）?tx_rd_index?=?0;?
????}?
}?

unsigned?char?getSPIchar（void）?
{?
??unsigned?char?data;?
??while?（rx_counter?==?0）;?//無接收數據，等待?
??data?=?SPI_rx_buff[rx_rd_index];?//從接收緩沖區取出一個SPI收到的數據?
??if?（++rx_rd_index?==?SIZE）?rx_rd_index?=?0;?//調整指針?
??CLI（）;?
??--rx_counter;?
????SEI（）;?
????return?data;?
}?

void?putSPIchar（char?c）?
{?
??while?（tx_counter?==?SIZE）;//發送緩沖區滿，等待?
??CLI（）;?
??if?（tx_counter?||?（（SPSR?&?0x80）?==?0））//發送緩沖區已中有待發數據?
????{?//或SPI正在發送數據時?
??????SPI_tx_buffer[tx_wr_index]?=?c;?//將數據放入發送緩沖區排隊?
??????if?（++tx_wr_index?==?SIZE）?tx_wr_index?=?0;?//調整指針?
??????++tx_counter;?
????}?
??else?
????SPDR?=?c;?//發送緩沖區中空且SPI口空閑，直接放入SPDR由SIP口發送?
SEI（）;?
}?

void?spi_init（void）?
{?
??unsigned?chat?temp;?
??DDRB?|=?0x080;?//MISO=input?and?MOSISCKSS?=?output?
??PORTB?|=?0x80;?//MISO上拉電阻有效?
??SPCR?=?0xD5;?//SPI允許，主機模式，MSB，允許SPI中斷，極性方式01，1/16系統時鐘速率?
??SPSR?=?0x00;?
??temp?=?SPSR;?
??temp?=?SPDR;?//清空SPI，和中斷標志，使SPI空閑?
}?

void?main（void）?
{?
??unsigned?char?I;?
??CLI（）;?//關中斷?
??spi_init（）;?//初始化SPI接口?
??SEI（）;?//開中斷?
??while（）?
????{?
??????putSPIchat（i）;?//發送一個字節?
??????i++;?
??????getSPIchar（）;?//接收一個字節（第一個字節為空字節）?
??????………?
????}?
}?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1567??2008-01-10?12:57??spi_interface\control_led.vhd

?????文件?????125142??2008-01-10?13:00??spi_interface\74hc595.pdf

?????文件???????3668??2008-01-10?15:37??spi_interface\pc104_spi.vhd

?????文件???????1006??2008-01-10?17:01??spi_interface\three_spi.vhd

?????文件???????6428??2007-12-16?18:58??spi_interface\spi93c46\.sopc_builder\install.ptf

?????目錄??????????0??2007-12-16?18:58??spi_interface\spi93c46\.sopc_builder

?????文件??????12988??2007-12-17?19:58??spi_interface\spi93c46\Block1.bdf

?????文件???????1758??2007-12-17?15:15??spi_interface\spi93c46\clk.bsf

?????文件????????342??2007-12-17?19:58??spi_interface\spi93c46\clk.v

?????文件???????2380??2007-12-16?18:54??spi_interface\spi93c46\db\mux_5kc.tdf

?????文件????????236??2007-12-17?21:10??spi_interface\spi93c46\db\wed.zsf

?????文件????????151??2008-01-10?15:12??spi_interface\spi93c46\db\spi93c46.db_info

?????文件????????149??2008-01-10?15:14??spi_interface\spi93c46\db\spi93c46.sld_design_entry.sci

?????文件????????156??2008-01-10?15:14??spi_interface\spi93c46\db\spi93c46.eco.cdb

?????目錄??????????0??2007-12-17?21:10??spi_interface\spi93c46\db

?????文件????????242??2007-12-16?19:14??spi_interface\spi93c46\mi.v

?????文件???????6050??2007-12-16?19:15??spi_interface\spi93c46\mi.vwf

?????文件????????237??2007-12-16?18:54??spi_interface\spi93c46\mo.v

?????文件???????5643??2007-12-16?18:45??spi_interface\spi93c46\mo.vwf

?????文件???????2154??2007-12-17?14:59??spi_interface\spi93c46\PushButton_Debouncer.bsf

?????文件???????1537??2007-12-13?16:30??spi_interface\spi93c46\PushButton_Debouncer.v

?????文件??????????0??2007-12-16?18:58??spi_interface\spi93c46\sopc_builder_debug_log.txt

?????文件???????7211??2007-12-17?19:58??spi_interface\spi93c46\spi93c46.asm.rpt

?????文件???????7035??2007-12-17?19:57??spi_interface\spi93c46\spi93c46.bsf

?????文件????????300??2007-12-17?15:45??spi_interface\spi93c46\spi93c46.cdf

?????文件?????????26??2007-12-17?19:58??spi_interface\spi93c46\spi93c46.done

?????文件????????239??2007-12-17?21:10??spi_interface\spi93c46\spi93c46.dpf

?????文件??????95396??2007-12-17?19:58??spi_interface\spi93c46\spi93c46.fit.rpt

?????文件????????513??2007-12-17?19:58??spi_interface\spi93c46\spi93c46.fit.smsg

?????文件????????491??2007-12-17?19:58??spi_interface\spi93c46\spi93c46.fit.summary

............此處省略109個文件信息