CH341 SPI 应用

BOOL CH34xStreamI2C( ULONG iWriteLength, PVOID iWriteBuffer,            ULONG iReadLength, PVOID oReadBuffer )   函数里

    mWrBuf[i++] = CH341A_CMD_I2C_STREAM;    if(( StreamMode & 0x03 ) == 0 )    {        mWrBuf[i++] = CH341A_CMD_I2C_STM_US | 10;        mWrBuf[i++] = CH341A_CMD_I2C_STM_US | 10;    }

这里有个调整I2C为低速的地方，但是其它高速、中速调整没有语句体现？

另外需用的是SPI，则调用 ：

BOOL CH34xStreamSPIx( ULONG iChipselect, ULONG iLength,            PVOID ioBuffer, PVOID ioBuffer2 )

但是这个函数中没有发现类似( StreamMode & 0x03 )的设置速度的语句

您好：

需要把库中的如下CH34xSetStream API用下面代码定义进行替换即可：

BOOL CH34xSetStream( ULONG Mode )

{

UCHAR mBuffer[CH341_PACKET_LENGTH];

ULONG mLength;

if( VenIC < 0x20 )

return false;

StreamMode = (UCHAR)( Mode & 0x8F );

mBuffer[0] = CH341A_CMD_I2C_STREAM;

mBuffer[1] = (UCHAR)(CH341A_CMD_I2C_STM_SET | StreamMode & 0x0F);

mBuffer[2] = CH341A_CMD_I2C_STM_END;

mLength = 3;

if( CH34xWriteData( mBuffer, &mLength ))

{

if( mLength >= 2 )

return true;

}

return false;

}

SPI默认速度不可调，约56KB/s,如果需要修改速度，需要方案定制。