SIM800L using TM4C123GXL and Energia

[MarcosA 1]

Hello everyone! I am using the SIM800L module to send SMS through a TivaC TM4C123GXL board, but its clock is 80MHz, and the library only accepts 20, 16 or 8 MHz. In Arduino it worked perfectly, this code found on a website. How do I reduce the TM4C123 clock in Power software? Is there another solution? Thanks in advance!
 

The code:

#include <SoftwareSerial.h>
SoftwareSerial sim(3, 4);
int _timeout;
String _buffer;
String number = ""; //here I inserted my number phone
void setup() {
  delay(4000); //delay for 7 seconds to make sure the modules get the signal
  Serial.begin(9600);
  _buffer.reserve(50);
  Serial.println("Sistem Started...");
  sim.begin(9600);
  delay(1000);
}
void loop() {
  SendMessage();
  delay(10000);
}
void SendMessage()
{
  //Serial.println ("Sending Message");
  sim.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);
  //Serial.println ("Set SMS Number");
  sim.println("AT+CMGS=\"" + number + "\"\r"); //Mobile phone number to send message
  delay(1000);
  String SMS = "Testing GSM module";
  sim.println(SMS);
  delay(100);
  sim.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
  _buffer = _readSerial();
}
String _readSerial() {
  _timeout = 0;
  while  (!sim.available() && _timeout < 12000  )
  {
    delay(13);
    _timeout++;
  }
  if (sim.available()) {
    return sim.readString();
  }
}

The error: 

 #error This version of SoftwareSerial supports only 20, 16 and 8MHz processors 

[Fmilburn 445]

I am not sure if Energia supports it on the TM4C123 but try using hardware serial - eg Serial1 or Serial2 instead of software serial http://energia.nu/reference/serial/

[MarcosA 1]

Thank you, Fmilburn! I was wrong when I was trying to use the library SoftwareSerial.h. Now just using Serial3.begin and etc and looking the arm's pin map, the program is working. Thank you one more time! 

[vinith 0]

hi marcosA please put the codes which you have changed even I am facing the same problem...

[Fmilburn 445]

I suggest looking in the language reference and getting familiar with it, e.g. http://energia.nu/reference/en/language/functions/communication/serial/begin/

You have not specified the board you are using and some do not offer multiple serial.  

[vinith 0]

same board tm4c123gxl