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各位前輩大家好,我是位剛剛接觸arduino的新人
我得目標是想透過讓arduino作為slave透過RS485orRS232來跟其他設備溝通
這段code是我在官方論壇裡面找到的,我用modscan32去 連線baud rate 9600 8N1 ID1 透過arduino本來的USB port 確實可以讀
寫資料成功,http://i.imgur.com/KYaXI07.jpg?1 http://i.imgur.com/gRMd3Hd.jpg?1
但是想試著用板上的rx tx 走 RS485以及RS232 再用modscan32 卻都連線不到了
1.arduino板上的RX TX 訊號格式是TTL 因此我買了個 ttl轉rs232的模塊http://goods.ruten.com.tw/item/show?21108295262738
2.我仿照這張圖http://dereenigne.org/wp-content/uploads/modbus.png 做了個轉換的電路http://i.imgur.com/NffJGNY.jpg?1
但以上兩種方式都通訊失敗
後來我直接去官方下載SimpleModbusSlave的範例 一樣沒辦法建立起連線https://code.google.com/p/simple-modbus/
請問各位前輩能給點建議嗎? 非常的感激
#include <modbus.h>
#include <modbusDevice.h>
#include <modbusRegBank.h>
#include <modbusSlave.h>
/* PINS
Add more registers if needed
Digital input pins 2,3,4,5,6,7
Digital output pins 8,9,12,13
Analog output pins 10,11 (PWM)
Analog input pins 0,1,2,3,4,5
*/
modbusDevice regBank;
modbusSlave slave;
int AI0,AI1,AI2,AI3,AI4,AI5;
void setup()
{
regBank.setId(1); ///Set Slave ID
//Add Digital Input registers
regBank.add(10002);
regBank.add(10003);
regBank.add(10004);
regBank.add(10005);
regBank.add(10006);
regBank.add(10007);
// Add Digital Output registers
regBank.add(8);
regBank.add(9);
regBank.add(12);
regBank.add(13);
//Analog input registers
regBank.add(30001);
regBank.add(30002);
regBank.add(30003);
regBank.add(30004);
regBank.add(30005);
regBank.add(30006);
//Analog Output registers
regBank.add(40010);
regBank.add(40011);
slave._device = ®Bank;
slave.setBaud(9600);
pinMode(2,INPUT);
pinMode(3,INPUT);
pinMode(4,INPUT);
pinMode(5,INPUT);
pinMode(6,INPUT);
pinMode(7,INPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(12,OUTPUT);
pinMode(13,OUTPUT);
}
void loop(){
while(1){
//Digital Input
byte DI2 = digitalRead(2);
if (DI2 >= 1)regBank.set(10002,1);
if (DI2 <= 0)regBank.set(10002,0);
byte DI3 = digitalRead(3);
if (DI3 >= 1)regBank.set(10003,1);
if (DI3 <= 0)regBank.set(10003,0);
byte DI4 = digitalRead(4);
if (DI4 >= 1)regBank.set(10004,1);
if (DI4 <= 0)regBank.set(10004,0);
byte DI5 = digitalRead(5);
if (DI5 >= 1)regBank.set(10005,1);
if (DI5 <= 0)regBank.set(10005,0);
byte DI6 = digitalRead(6);
if (DI6 >= 1)regBank.set(10006,1);
if (DI6 <= 0)regBank.set(10006,0);
byte DI7 = digitalRead(7);
if (DI7 >= 1)regBank.set(10007,1);
if (DI7 <= 0)regBank.set(10007,0);
//Digital output
int DO8 = regBank.get(8);
if (DO8 <= 0 && digitalRead(8) == HIGH)digitalWrite(8,LOW);
if (DO8 >= 1 && digitalRead(8) == LOW)digitalWrite(8,HIGH);
int DO9 = regBank.get(9);
if (DO9 <= 0 && digitalRead(9) == HIGH)digitalWrite(9,LOW);
if (DO9 >= 1 && digitalRead(9) == LOW)digitalWrite(9,HIGH);
int DO12 = regBank.get(12);
if (DO12 <= 0 && digitalRead(12) == HIGH)digitalWrite(12,LOW);
if (DO12 >= 1 && digitalRead(12) == LOW)digitalWrite(12,HIGH);
int DO13 = regBank.get(13);
if (DO13 <= 0 && digitalRead(13) == HIGH)digitalWrite(13,LOW);
if (DO13 >= 1 && digitalRead(13) == LOW)digitalWrite(13,HIGH);
//Analog input ***READ Twice deliberately
AI0 = analogRead(0);
delay(10);
AI0 = analogRead(0);
regBank.set(30001, (word) AI0);
delay(10);
AI1 = analogRead(1);
delay(10);
AI1 = analogRead(1);
regBank.set(30002, (word) AI1);
delay(10);
AI2 = analogRead(2);
delay(10);
AI2 = analogRead(2);
regBank.set(30003, (word) AI2);
delay(10);
AI3 = analogRead(3);
delay(10);
AI3 = analogRead(3);
regBank.set(30004, (word) AI3);
delay(10);
AI4 = analogRead(4);
delay(10);
AI4 = analogRead(4);
regBank.set(30005, (word) AI4);
delay(10);
AI5 = analogRead(5);
delay(10);
AI5 = analogRead(5);
regBank.set(30006, (word) AI5);
delay(10);
//Analog output
word AO10 = regBank.get(40010);
analogWrite(10,AO10);
delay(10);
word AO11 = regBank.get(40011);
analogWrite(11,AO11);
delay(10);
slave.run();
}
}
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发表于 2014-2-7 17:02:29
