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Make RS485Class a configurable argument for ModbusRTU* #59

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Merged
merged 1 commit into from
May 25, 2021
Merged

Make RS485Class a configurable argument for ModbusRTU* #59

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13 changes: 12 additions & 1 deletion src/ModbusRTUClient.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -31,13 +31,18 @@ ModbusRTUClientClass::ModbusRTUClientClass() :
{
}

ModbusRTUClientClass::ModbusRTUClientClass(RS485Class& rs485) :
_rs485(&rs485), ModbusClient(1000)
{
}

ModbusRTUClientClass::~ModbusRTUClientClass()
{
}

int ModbusRTUClientClass::begin(unsigned long baudrate, uint16_t config)
{
modbus_t* mb = modbus_new_rtu(baudrate, config);
modbus_t* mb = modbus_new_rtu(_rs485, baudrate, config);

if (!ModbusClient::begin(mb, 0x00)) {
return 0;
Expand All @@ -46,4 +51,10 @@ int ModbusRTUClientClass::begin(unsigned long baudrate, uint16_t config)
return 1;
}

int ModbusRTUClientClass::begin(RS485Class& rs485, unsigned long baudrate, uint16_t config)
{
_rs485 = &rs485;
return begin(baudrate, config);
}

ModbusRTUClientClass ModbusRTUClient;
6 changes: 6 additions & 0 deletions src/ModbusRTUClient.h
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Expand Up @@ -21,10 +21,12 @@
#define _MODBUS_RTU_CLIENT_H_INCLUDED

#include "ModbusClient.h"
#include <ArduinoRS485.h>

class ModbusRTUClientClass : public ModbusClient {
public:
ModbusRTUClientClass();
ModbusRTUClientClass(RS485Class& rs485);
virtual ~ModbusRTUClientClass();

/**
Expand All @@ -36,6 +38,10 @@ class ModbusRTUClientClass : public ModbusClient {
* Return 1 on success, 0 on failure
*/
int begin(unsigned long baudrate, uint16_t config = SERIAL_8N1);
int begin(RS485Class& rs485, unsigned long baudrate, uint16_t config = SERIAL_8N1);

private:
RS485Class* _rs485;
};

extern ModbusRTUClientClass ModbusRTUClient;
Expand Down
12 changes: 11 additions & 1 deletion src/ModbusRTUServer.cpp
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Expand Up @@ -30,13 +30,17 @@ ModbusRTUServerClass::ModbusRTUServerClass()
{
}

ModbusRTUServerClass::ModbusRTUServerClass(RS485Class& rs485) : _rs485(&rs485)
{
}

ModbusRTUServerClass::~ModbusRTUServerClass()
{
}

int ModbusRTUServerClass::begin(int id, unsigned long baudrate, uint16_t config)
{
modbus_t* mb = modbus_new_rtu(baudrate, config);
modbus_t* mb = modbus_new_rtu(_rs485, baudrate, config);

if (!ModbusServer::begin(mb, id)) {
return 0;
Expand All @@ -47,6 +51,12 @@ int ModbusRTUServerClass::begin(int id, unsigned long baudrate, uint16_t config)
return 1;
}

int ModbusRTUServerClass::begin(RS485Class& rs485, int id, unsigned long baudrate, uint16_t config)
{
_rs485 = &rs485;
return begin(id, baudrate, config);
}

void ModbusRTUServerClass::poll()
{
uint8_t request[MODBUS_RTU_MAX_ADU_LENGTH];
Expand Down
6 changes: 6 additions & 0 deletions src/ModbusRTUServer.h
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Expand Up @@ -21,10 +21,12 @@
#define _MODBUS_RTU_SERVER_H_INCLUDED

#include "ModbusServer.h"
#include <ArduinoRS485.h>

class ModbusRTUServerClass : public ModbusServer {
public:
ModbusRTUServerClass();
ModbusRTUServerClass(RS485Class& rs485);
virtual ~ModbusRTUServerClass();

/**
Expand All @@ -37,11 +39,15 @@ class ModbusRTUServerClass : public ModbusServer {
* Return 1 on success, 0 on failure
*/
int begin(int id, unsigned long baudrate, uint16_t config = SERIAL_8N1);
int begin(RS485Class& rs485, int id, unsigned long baudrate, uint16_t config = SERIAL_8N1);

/**
* Poll interface for requests
*/
virtual void poll();

private:
RS485Class* _rs485 = &RS485;
};

extern ModbusRTUServerClass ModbusRTUServer;
Expand Down
3 changes: 2 additions & 1 deletion src/libmodbus/modbus-rtu-private.h
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Expand Up @@ -17,7 +17,7 @@
#if defined(_WIN32)
#include <windows.h>
#elif defined(ARDUINO)
// nothing extra needed
#include <ArduinoRS485.h>
#else
#include <termios.h>
#endif
Expand Down Expand Up @@ -49,6 +49,7 @@ typedef struct _modbus_rtu {
#if defined(ARDUINO)
unsigned long baud;
uint16_t config;
RS485Class* rs485;
#else
/* Device: "/dev/ttyS0", "/dev/ttyUSB0" or "/dev/tty.USA19*" on Mac OS X. */
char *device;
Expand Down
37 changes: 19 additions & 18 deletions src/libmodbus/modbus-rtu.cpp
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Expand Up @@ -323,15 +323,15 @@ static ssize_t _modbus_rtu_send(modbus_t *ctx, const uint8_t *req, int req_lengt
DWORD n_bytes = 0;
return (WriteFile(ctx_rtu->w_ser.fd, req, req_length, &n_bytes, NULL)) ? (ssize_t)n_bytes : -1;
#elif defined(ARDUINO)
(void)ctx;
modbus_rtu_t *ctx_rtu = (modbus_rtu_t*)ctx->backend_data;

ssize_t size;

RS485.noReceive();
RS485.beginTransmission();
size = RS485.write(req, req_length);
RS485.endTransmission();
RS485.receive();
ctx_rtu->rs485->noReceive();
ctx_rtu->rs485->beginTransmission();
size = ctx_rtu->rs485->write(req, req_length);
ctx_rtu->rs485->endTransmission();
ctx_rtu->rs485->receive();

return size;
#else
Expand Down Expand Up @@ -394,9 +394,9 @@ static ssize_t _modbus_rtu_recv(modbus_t *ctx, uint8_t *rsp, int rsp_length)
#if defined(_WIN32)
return win32_ser_read(&((modbus_rtu_t *)ctx->backend_data)->w_ser, rsp, rsp_length);
#elif defined(ARDUINO)
(void)ctx;
modbus_rtu_t *ctx_rtu = (modbus_rtu_t*)ctx->backend_data;

return RS485.readBytes(rsp, rsp_length);
return ctx_rtu->rs485->readBytes(rsp, rsp_length);
#else
return read(ctx->s, rsp, rsp_length);
#endif
Expand Down Expand Up @@ -654,8 +654,8 @@ static int _modbus_rtu_connect(modbus_t *ctx)
return -1;
}
#elif defined(ARDUINO)
RS485.begin(ctx_rtu->baud, ctx_rtu->config);
RS485.receive();
ctx_rtu->rs485->begin(ctx_rtu->baud, ctx_rtu->config);
ctx_rtu->rs485->receive();
#else
/* The O_NOCTTY flag tells UNIX that this program doesn't want
to be the "controlling terminal" for that port. If you
Expand Down Expand Up @@ -1210,8 +1210,8 @@ static void _modbus_rtu_close(modbus_t *ctx)
#elif defined(ARDUINO)
(void)ctx_rtu;

RS485.noReceive();
RS485.end();
ctx_rtu->rs485->noReceive();
ctx_rtu->rs485->end();
#else
if (ctx->s != -1) {
tcsetattr(ctx->s, TCSANOW, &ctx_rtu->old_tios);
Expand All @@ -1228,10 +1228,10 @@ static int _modbus_rtu_flush(modbus_t *ctx)
ctx_rtu->w_ser.n_bytes = 0;
return (PurgeComm(ctx_rtu->w_ser.fd, PURGE_RXCLEAR) == FALSE);
#elif defined(ARDUINO)
(void)ctx;
modbus_rtu_t *ctx_rtu = (modbus_rtu_t*)ctx->backend_data;

while (RS485.available()) {
RS485.read();
while (ctx_rtu->rs485->available()) {
ctx_rtu->rs485->read();
}

return 0;
Expand All @@ -1256,14 +1256,14 @@ static int _modbus_rtu_select(modbus_t *ctx, fd_set *rset,
return -1;
}
#elif defined(ARDUINO)
(void)ctx;
modbus_rtu_t *ctx_rtu = (modbus_rtu_t*)ctx->backend_data;
(void)rset;

unsigned long wait_time_millis = (tv == NULL) ? 0 : (tv->tv_sec * 1000) + (tv->tv_usec / 1000);
unsigned long start = millis();

do {
s_rc = RS485.available();
s_rc = ctx_rtu->rs485->available();

if (s_rc >= length_to_read) {
break;
Expand Down Expand Up @@ -1330,7 +1330,7 @@ const modbus_backend_t _modbus_rtu_backend = {
};

#ifdef ARDUINO
modbus_t* modbus_new_rtu(unsigned long baud, uint16_t config)
modbus_t* modbus_new_rtu(RS485Class *rs485, unsigned long baud, uint16_t config)
#else
modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
Expand Down Expand Up @@ -1362,6 +1362,7 @@ modbus_t* modbus_new_rtu(const char *device,
ctx->backend_data = (modbus_rtu_t *)malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
#ifdef ARDUINO
ctx_rtu->rs485 = rs485;
ctx_rtu->baud = baud;
ctx_rtu->config = config;
#else
Expand Down
3 changes: 2 additions & 1 deletion src/libmodbus/modbus-rtu.h
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Expand Up @@ -18,7 +18,8 @@ MODBUS_BEGIN_DECLS
#define MODBUS_RTU_MAX_ADU_LENGTH 256

#ifdef ARDUINO
MODBUS_API modbus_t* modbus_new_rtu(unsigned long baud, uint16_t config);
class RS485Class;
MODBUS_API modbus_t* modbus_new_rtu(RS485Class *rs485, unsigned long baud, uint16_t config);
#else
MODBUS_API modbus_t* modbus_new_rtu(const char *device, int baud, char parity,
int data_bit, int stop_bit);
Expand Down