1、【完善】部分注释内容。
Signed-off-by: armink <armink.ztl@gmail.com>
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@ -16,7 +16,7 @@
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* File: $Id: portevent.c,v 1.60 2015/02/01 9:18:05 Armink $
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* File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
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*/
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/* ----------------------- System includes --------------------------------*/
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@ -260,8 +260,8 @@ eMBErrorCode eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT us
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if ((usAddress >= DISCRETE_INPUT_START)
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&& (usAddress + usNDiscrete <= DISCRETE_INPUT_START + DISCRETE_INPUT_NDISCRETES))
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{
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iRegIndex = (USHORT) (usAddress - usDiscreteInputStart) / 8; //每个寄存器存8个
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iRegBitIndex = (USHORT) (usAddress - usDiscreteInputStart) % 8; //相对于寄存器内部的位地址
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iRegIndex = (USHORT) (usAddress - usDiscreteInputStart) / 8;
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iRegBitIndex = (USHORT) (usAddress - usDiscreteInputStart) % 8;
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while (iNReg > 0)
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{
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@ -124,8 +124,11 @@ Modbus一共有4种不同的数据类型,所有的Modbus功能都围绕这些
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|vMBMasterPortTimersRespondTimeoutEnable |设置定时器按照响应超时时间开始计数|
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|vMBMasterPortTimersDisable |失能定时器,定时器将停止计数|
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|prvvTIMERExpiredISR |定时器中断服务程序接口,按照默认方式,直接引用`pxMBMasterPortCBTimerExpired`方法即可|
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> 注:
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1、`usPrescalerValue`及`usT35TimeOut50us`在文件顶部有定义
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2、转换延时时间及响应超时时间在`FreeModbus\modbus\include\mbconfig.h`,用户可以根据自己系统的特点自行设置。
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除上面接口方法外,用户需要在文件末尾增加CPU的自带的定时器中断服务程序,将上表中的定时器中断服务程序接口放进去。
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