TI Launchpad TM4C123 QEI (Quadrature Encoder Interface) Energia

[miguelzea35 0]

I want know why my code isn't work, I used to use in TM4C129 and edit the code to used in TM4C123GXL, but it doesn't work.

 

#include <stdint.h>
#include "driverlib/sysctl.h"
#include "driverlib/qei.h"
 
int pos;
 
void setup() {
  Serial.begin(9600);
  // Setup QEI Module
  SysCtlPeripheralEnable(SYSCTL_PERIPH_QEI0);
  GPIOPinConfigure(0x00031806); //GPIO_PD6_PHA0
  GPIOPinConfigure(0x00031C06); //GPIO_PD7_PHB0
  GPIOPinTypeQEI(GPIO_PORTL_BASE, GPIO_PIN_1 |  GPIO_PIN_2);
 
  // Configure and Enable QEI
  QEIConfigure(QEI0_BASE, (QEI_CONFIG_CAPTURE_A_B | QEI_CONFIG_NO_RESET | QEI_CONFIG_QUADRATURE | QEI_CONFIG_NO_SWAP), 2147483648);
  QEIVelocityConfigure(QEI0_BASE, QEI_VELDIV_1, SysCtlClockGet()); // Divide by clock speed to get counts/sec
  QEIEnable(QEI0_BASE);
  QEIVelocityEnable(QEI0_BASE);
}
 
void loop() {
  // Report Position & Velocity of Encoder to Serial Terminal
  Serial.print(QEIPositionGet(QEI0_BASE));
  Serial.print(',');
  Serial.println(QEIVelocityGet(QEI0_BASE));
  delay(10);
}

[Rei Vilo 695]

• Perform a search with quadrature https://forum.43oh.com/search/?&amp;q=quadrature
• See http://forum.43oh.com/topic/7170-using-harware-qei-on-tiva-launchpad/

[miguelzea35 0]

I tried the codes that they use but didn´t work

[Rei Vilo 695]

The code I mentioned actually works for me. I went through the well-written TivaWare™ Peripheral Driver Library for C Series User's Guide (Rev. D).

As an option, you can start from scratch and develop your own library.

[energia 484]

Alternatively you could use https://github.com/energia-libraries/RotaryEncoder