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SPI 的代码
spi.h
#ifndef _SPI_H
#define _SPI_H
void spi_init(void);
uchar spi(uchar data);
#endif
spi.o.d
spi.o: ../spi.c ../main.h \
d:/program\ files/winavr/bin/../avr/include/avr/io.h \
d:/program\ files/winavr/bin/../avr/include/avr/sfr_defs.h \
d:/program\ files/winavr/bin/../avr/include/int
spi.c
//pin脚定义
//SD卡使用SPI模式进行读写
//CS ->P2.2
//MOSI->P2.3
//CLK ->P2.4
//MISO->P2.6
//#include "spi.h"
//用SPI发送一个字节数据
void write_byte_spi(uchar dat)
{
uchar i;
for (i=0;i
spi.mcs
[Header]
MagicCookie={0b13fe8c-dfe0-40eb-8900-6712719559a7}
Version=1.0
[File000]
Location=E:\Proteus\mine eg\SPI-2huibian\SPI.err
Folder=Intermediary
DeviceName=PIC16F877
LanguageToolSuiteID={
spi.tagsrc
E:\Proteus\mine eg\SPI-2\SPI.ASM
spi.err
Message[302] E:\PROTEUS\MINE EG\SPI-2HUIBIAN\SPI.ASM 10 : Register in operand not in bank 0. Ensure that bank bits are correct.
Message[302] E:\PROTEUS\MINE EG\SPI-2HUIBIAN\SPI.ASM 12 : Register in
spi.tagsrc
D:\PIC works\PIC16\SPI\SPI_time\SPI.C
spi.err
"spi.c", line 98: Warning: C2917W: no side effect in void context: 'unary *'
"spi.c", line 154: Warning: C2870W: variable 'i' declared but not used
"spi.c", line 186: Warning: C2892E: signed c
spi.c
/* SPI接口子程序,供CH374子程序库调用 */
UINT8 CH374_READ_REGISTER( UINT8 mAddr ) /* 外部定义的被CH374程序库调用的子程序,从指定寄存器读取数据 */
{
UINT8 d;
Spi374Start( mAddr, CMD_SPI_374READ );
d = Spi374InByte( );
Spi374Sto
spi.c
/* SPI接口子程序,供CH374子程序库调用 */
UINT8 CH374_READ_REGISTER( UINT8 mAddr ) /* 外部定义的被CH374程序库调用的子程序,从指定寄存器读取数据 */
{
UINT8 d;
Spi374Start( mAddr, CMD_SPI_374READ );
d = Spi374InByte( );
Spi374Sto