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rosiley
Joined: 29 May 2014
Posts: 18
Location: Brasil
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| Help to 2 serials |
 Posted: Mon May 08, 2017 6:30 am |
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Hello everyone.
I have two doubts here.
1: I have a hardware that consists of an adc converter. This converter sends via rs232 the value converted in volts and the same is shown in the software made in C#. The value shown for example is 1234. Only in soft this value is not stable. Already checked in Hyperterminal and everything ok.
| Code: | string An_Input, str = null;
long tempox = 0;
public void RecepcaoSerial()
{
An_Input += serialPort1.ReadExisting();
lblSensor.Text = An_Input + " mV\r\n";
txtSensor.AppendText(DateTime.Now + " - " + An_Input + "\r\n");
str += An_Input;
An_Input = null;
if (chart1.Series[0].Points.Count > 8)
{
chart1.Series[0].Points.RemoveAt(0);
chart1.Update();
}
chart1.Series[0].Points.AddXY(tempox, int.Parse(str.Substring(0, 4)));
chart1.ChartAreas[0].AxisX.LabelStyle.Format = "HH:mm:ss\n"; // I use \n (cr).
tempox++;
str = null;
}
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2: How do I get this same value to be transmitted to another serial port, I know we can do it for soft but I have no concept, it follows what I think can work.
| Code: |
#include <18f4553.h>
#include <stdlib.h>
#include <CTYPE.h>
#include <STRING.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(stream=RS232HW,baud=9600,xmit=PIN_C6,rcv=PIN_C7)//Hw UART-->INT RDA
#use rs232(stream=RS232SW,baud=9600,xmit=PIN_B1,rcv=PIN_B0,FORCE_SW)//SW UART-->INT EXT
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#INT_RDA //Port interruption treatment would be serial port HW
void hw_uart_isr (){
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}
#INT_EXT //Port interruption treatment would be SW
void sw_uart_isr (){
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}
void main ()
{
ext_int_edge(H_TO_L);
enable_interrupts(INT_EXT);
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
fprintf(RS232HW,"send to serial port HW\n\r");
fprintf(RS232SW,"send to serial port SW\n\r");
}
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Ttelmah
Joined: 11 Mar 2010
Posts: 19552
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| Posted: Mon May 08, 2017 9:25 am |
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Forget it....
Use a PIC with two hardware serials.
Trying to use a software serial is almost certain to result in corrupted data, or loss of characters. |
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temtronic
Joined: 01 Jul 2010
Posts: 9246
Location: Greensville,Ontario
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| Posted: Mon May 08, 2017 10:00 am |
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mr T is 100% correct.
Use an 18F46K22 (40 pin) or 18F26K22 (28 pin). They both have TWO hardware UARTS.
The 46K22 is my 'goto' PIC or 'Swiss Army Knife' PIC. LOTS of memory, peripherals AND works at 3 or 5 volts at FULL speed !
The CCS supplied ex_sisr.c test program does work for BOTH serial ports at 115K2 baud and I've never missed a single byte in years of 24/7 use.
Jay |
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