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mb_os_iii.c
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mb_os_iii.c
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/*
*********************************************************************************************************
* uC/Modbus
* The Embedded Modbus Stack
*
* Copyright 2003-2020 Silicon Laboratories Inc. www.silabs.com
*
* SPDX-License-Identifier: APACHE-2.0
*
* This software is subject to an open source license and is distributed by
* Silicon Laboratories Inc. pursuant to the terms of the Apache License,
* Version 2.0 available at www.apache.org/licenses/LICENSE-2.0.
*
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* MODBUS uC/OS-III LAYER INTERFACE
*
* Filename : mb_os.c
* Version : V2.14.00
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define MB_OS_MODULE
#include "mb.h"
/*
*********************************************************************************************************
* LOCAL DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
static OS_SEM MB_OS_RxSemTbl[MODBUS_CFG_MAX_CH];
#endif
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
static OS_TCB MB_OS_RxTaskTCB;
static CPU_STK MB_OS_RxTaskStk[MB_OS_CFG_RX_TASK_STK_SIZE];
#endif
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
static void MB_OS_InitMaster(void);
static void MB_OS_ExitMaster(void);
#endif
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
static void MB_OS_InitSlave (void);
static void MB_OS_ExitSlave (void);
static void MB_OS_RxTask (void *p_arg);
#endif
/*
*********************************************************************************************************
* LOCAL CONFIGURATION ERRORS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* MB_OS_Init()
*
* Description : This function initializes the RTOS interface. This function creates the following:
*
* (1) A message queue to signal the reception of a packet.
*
* (2) A task that waits for packets to be received.
*
* Argument(s) : none
*
* Return(s) : none.
*
* Caller(s) : MB_Init().
*
* Note(s) : none.
*********************************************************************************************************
*/
void MB_OS_Init (void)
{
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
MB_OS_InitMaster();
#endif
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
MB_OS_InitSlave();
#endif
}
/*
*********************************************************************************************************
* MB_OS_InitMaster()
*
* Description : This function initializes and creates the kernel objectes needed for Modbus Master
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : MB_OS_Init().
*
* Note(s) : none.
*********************************************************************************************************
*/
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
static void MB_OS_InitMaster (void)
{
CPU_INT08U i;
OS_ERR err;
for (i = 0; i < MODBUS_CFG_MAX_CH; i++) { /* Create a semaphore for each channel */
OSSemCreate(&MB_OS_RxSemTbl[i],
(CPU_CHAR *)"uC/Modbus Rx Sem",
0,
&err);
}
}
#endif
/*
*********************************************************************************************************
* MB_OS_InitSlave()
*
* Description : This function initializes and creates the kernel objectes needed for Modbus Salve
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : MB_OS_Init().
*
* Note(s) : none.
*********************************************************************************************************
*/
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
static void MB_OS_InitSlave (void)
{
OS_ERR err;
OSTaskCreate(&MB_OS_RxTaskTCB,
(CPU_CHAR *)"Modbus Rx Task",
MB_OS_RxTask,
(void *)0,
MB_OS_CFG_RX_TASK_PRIO,
&MB_OS_RxTaskStk[0],
MB_OS_CFG_RX_TASK_STK_SIZE / 10,
MB_OS_CFG_RX_TASK_STK_SIZE,
MODBUS_CFG_MAX_CH,
0,
(void *)0,
(OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
&err);
}
#endif
/*
*********************************************************************************************************
* MB_OS_Exit()
*
* Description : This function is called to terminate the RTOS interface for Modbus channels. We delete
* the following uC/OS-II objects:
*
* (1) An event flag group to signal the reception of a packet.
* (2) A task that waits for packets to be received.
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : MB_Exit().
*
* Note(s) : none.
*********************************************************************************************************
*/
void MB_OS_Exit (void)
{
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
MB_OS_ExitMaster();
#endif
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
MB_OS_ExitSlave();
#endif
}
/*
*********************************************************************************************************
* MB_OS_ExitMaster()
*
* Description : This function is called to terminate the RTOS interface for Modbus Master channels. The
* following objects are deleted.
*
* (1) An event flag group to signal the reception of a packet.
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : MB_OS_Exit().
*
* Note(s) : none.
*********************************************************************************************************
*/
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
static void MB_OS_ExitMaster (void)
{
CPU_INT08U i;
OS_ERR err;
for (i = 0; i < MODBUS_CFG_MAX_CH; i++) { /* Delete semaphore for each channel */
OSSemDel(&MB_OS_RxSemTbl[i],
OS_OPT_DEL_ALWAYS,
&err);
}
}
#endif
/*
*********************************************************************************************************
* MB_OS_ExitSlave()
*
* Description : This function is called to terminate the RTOS interface for Modbus Salve channels.
* The following objects are deleted.
*
* (1) A task that waits for packets to be received.
* (2) A message queue to signal the reception of a packet.
*
* Argument(s) : none
*
* Return(s) : none.
*
* Caller(s) : MB_OS_Exit().
*
* Note(s) : none.
*********************************************************************************************************
*/
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
void MB_OS_ExitSlave (void)
{
OS_ERR err;
OSTaskDel(&MB_OS_RxTaskTCB, /* Delete Modbus Rx Task */
&err);
(void)err;
}
#endif
/*
*********************************************************************************************************
* MB_OS_RxSignal()
*
* Description : This function signals the reception of a packet either from the Rx ISR(s) or the RTU timeout
* timer(s) to indicate that a received packet needs to be processed.
*
* Argument(s) : pch specifies the Modbus channel data structure in which a packet was received.
*
* Return(s) : none.
*
* Caller(s) : MB_ASCII_RxByte(),
* MB_RTU_TmrUpdate().
*
* Note(s) : none.
*********************************************************************************************************
*/
void MB_OS_RxSignal (MODBUS_CH *pch)
{
OS_ERR err;
if (pch != (MODBUS_CH *)0) {
switch (pch->MasterSlave) {
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
case MODBUS_MASTER:
(void)OSSemPost(&MB_OS_RxSemTbl[pch->Ch],
OS_OPT_POST_1,
&err);
break;
#endif
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
case MODBUS_SLAVE:
default:
(void)OSTaskQPost(&MB_OS_RxTaskTCB,
pch,
sizeof(void *),
OS_OPT_POST_FIFO,
&err);
break;
#endif
}
}
}
/*
*********************************************************************************************************
* MB_OS_RxWait()
*
* Description : This function waits for a response from a slave.
*
* Argument(s) : pch specifies the Modbus channel data structure to wait on.
*
* perr is a pointer to a variable that will receive an error code. Possible errors are:
*
* MODBUS_ERR_NONE the call was successful and a packet was received
* MODBUS_ERR_TIMED_OUT a packet was not received within the specified timeout
* MODBUS_ERR_NOT_MASTER the channel is not a Master
* MODBUS_ERR_INVALID an invalid error was detected
*
* Return(s) : none.
*
* Caller(s) : MBM_FCxx() Modbus Master Functions
*
* Return(s) : none.
*********************************************************************************************************
*/
void MB_OS_RxWait (MODBUS_CH *pch,
CPU_INT16U *perr)
{
#if (MODBUS_CFG_MASTER_EN == DEF_ENABLED)
OS_ERR err;
CPU_TS ts;
if (pch != (MODBUS_CH *)0) {
if (pch->MasterSlave == MODBUS_MASTER) {
OSSemPend(&MB_OS_RxSemTbl[pch->Ch],
pch->RxTimeout,
OS_OPT_PEND_BLOCKING,
&ts,
&err);
switch (err) {
case OS_ERR_OBJ_DEL:
case OS_ERR_OBJ_PTR_NULL:
case OS_ERR_OBJ_TYPE:
case OS_ERR_PEND_ABORT:
case OS_ERR_PEND_ISR:
case OS_ERR_PEND_WOULD_BLOCK:
case OS_ERR_SCHED_LOCKED:
case OS_ERR_STATUS_INVALID:
*perr = MODBUS_ERR_INVALID;
break;
case OS_ERR_TIMEOUT:
*perr = MODBUS_ERR_TIMED_OUT;
break;
case OS_ERR_NONE:
*perr = MODBUS_ERR_NONE;
break;
}
} else {
*perr = MODBUS_ERR_NOT_MASTER;
}
} else {
*perr = MODBUS_ERR_NULLPTR;
}
#else
*perr = MODBUS_ERR_INVALID;
#endif
}
/*
*********************************************************************************************************
* MB_OS_RxTask()
*
* Description : This task is created by MB_OS_Init() and waits for signals from either the Rx ISR(s) or
* the RTU timeout timer(s) to indicate that a packet needs to be processed.
*
* Argument(s) : p_arg is a pointer to an optional argument that is passed by uC/OS-II to the task.
* This argument is not used.
*
* Return(s) : none.
*
* Caller(s) : This is a Task.
*
* Return(s) : none.
*********************************************************************************************************
*/
#if (MODBUS_CFG_SLAVE_EN == DEF_ENABLED)
static void MB_OS_RxTask (void *p_arg)
{
OS_ERR err;
OS_MSG_SIZE msg_size;
CPU_TS ts;
MODBUS_CH *pch;
(void)p_arg;
while (DEF_TRUE) {
pch = (MODBUS_CH *)OSTaskQPend(0, /* Wait for a packet to be received */
OS_OPT_PEND_BLOCKING,
&msg_size,
&ts,
&err);
MB_RxTask(pch); /* Process the packet received */
}
}
#endif