Infineon GPT12 Timer Concatenation 1 Guide d'installation

AURIX™ TC2xx Microcontroller Training

V1.0.0

GPT12_PWM_Generation_1

for KIT_AURIX_TC297_TFT

Generation of PWM via GPT12

Please read the Important Notice and Warnings at the end of this document

Scope of work

A pulse width modulated (PWM) signal with fixed frequency and a

defined duty cycle is generated using GPT12.

The timer T3 of GPT1 is used in timer mode with its count direction

configured to “down-counting”. On underflow of timer T3, the Output Toggle

Latch (T3OTL) is toggled and the value of timer T2 or T4 is transferred into

timer T3 depending on T3OTL value. The state of an LED is toggled in an

interrupt service routine which is triggered by the timer T3.

Introduction

›The General Purpose Timer Unit (GPT12) is made of two GPT blocks

(GPT1 and GPT2).

›Each block has a multifunctional timer structure which incorporates

several 16-bit timers.

›Block GPT1 contains three timers: the core timer T3 and two auxiliary

timers T2 and T4.

›All three timers of block GPT1 can run in one of four modes: Timer Mode,

Gated Timer Mode, Counter Mode or Incremental Interface Mode.

Hardware setup

This code example has been

developed for the board

KIT_AURIX_TC297_TFT_BC-Step.

LED D107 (1) is used for this

example.

Implementation

Configure the GPT12 Module

To generate a PWM signal with the GPT1 block, it is needed to:

›Enable the GPT12 module

›Configure the frequency for the block GPT1 by setting the prescaler value (BPS1)

of the divider

›Configure the frequency for the timer T3 by setting the prescaler value (T3I) of the

divider

›Configure the timer T3 mode, direction and starting value

›Configure the two auxiliary timers (timer mode, reload input mode and reload

values) to reload the timer T3

The above steps are detailed in the following slides.

Implementation

Configure the GPT12 Module

Configuration of the GPT12 is done once in the function initGpt12PWM() by the

following steps:

›Enable GPT12 module by calling the iLLD function IfxGpt12_enableModule()

›Set GPT1 prescaler with the iLLD function IfxGpt12_setGpt1BlockPrescaler()

›Configure the mode of timer T3 by using the iLLD function

IfxGpt12_T3_setMode()

›Set the counting direction of the timer T3 by calling the iLLD function

IfxGpt12_T3_setTimerDirection()

›Set the prescaler of timer T3 by calling the iLLD function

IfxGpt12_T3_setTimerPrescaler()

›Set the timer value with the iLLD function IfxGpt12_T3_setTimerValue() and use

an uint16 number as parameter

The configuration functions above are provided by the iLLD header IfxGpt12.h.

Implementation

Reload Values calculation example

Calculating the correct reload value to generate a PWM signal, depending on the given

frequency f and duty cycle, is done in the initialization function initGpt12PWM():

›Get the GPT12 module base frequency 𝑓

𝐺𝑃𝑇 by calling the iLLD function

IfxGpt12_getModuleFrequency()

›Calculate the timer frequency with the following formula:

The GPT1 block prescaler is set to IfxGpt12_Gpt1BlockPrescaler_32, 𝑓

𝐺𝑃𝑇 is divided by 32

The timer prescaler is set to IfxGpt12_TimerInputPrescaler_32, 𝑓

𝐺𝑃𝑇 is divided by 32

›Calculate dutyUpTime and dutyDownTime with the following formulas:

𝑓𝑡𝑖𝑚𝑒𝑟 =𝑓

𝐺𝑃𝑇

GPT1_BLOCK_PRESCALER ×TimerInputPrescaler

𝒅𝒖𝒕𝒚𝑼𝒑𝑻𝒊𝒎𝒆 = 𝑓𝑡𝑖𝑚𝑒𝑟 ×𝑑𝑢𝑡𝑦𝐶𝑦𝑐𝑙𝑒

100

𝑓𝒅𝒖𝒕𝒚𝑫𝒐𝒘𝒏𝑻𝒊𝒎𝒆 =

𝑓𝑡𝑖𝑚𝑒𝑟 × 1 − 𝑑𝑢𝑡𝑦𝐶𝑦𝑐𝑙𝑒

100

𝑓

Implementation

Configuring timers T2 and T4 to enable the reload of timer T3

Configurations of timers T2 and T4 are done once in the function initGpt12Timer() by the

following steps:

›Configure timers T2 and T4 in reload mode by using the iLLD function

IfxGpt12_T2_setMode() and IfxGpt12_T4_setMode()

›Set the trigger event for reload of timer T3 by using the iLLD functions

IfxGpt12_T2_setReloadInputMode() and IfxGpt12_T4_setReloadInputMode()

›Set timer T2 value with the iLLD function IfxGpt12_T2_setTimerValue() and

dutyDownTime as parameter

›Set timer T4 value with the iLLD function IfxGpt12_T4_setTimerValue() and

dutyUpTime as parameter

Starting timer T3

Finally, starting the timer T3 is done in the function runGpt12PWM() by calling the iLLD

function IfxGpt12_T3_run().

The above functions are provided by the iLLD header IfxGpt12.h.

Implementation

Configuring the interrupt for GPT12

Configuration of the interrupt is done once in the function initGpt12Timer() by the

following steps:

›Get the address of timer T3 service request with the iLLD function

IfxGpt12_T3_getSrc()

›Initialize GPT12 interrupt by calling IfxSrc_init() with a pointer to the address of

the timer T3 service request, the interrupt provider and the interrupt priority

number as parameters

›Enable GPT12 interrupt with the iLLD function IfxSrc_enable() and the pointer to

the address of timer T3 service request as parameter

The function IfxGpt12_T3_getSrc() is provided by the header IfxGpt12.h and the

functions IfxSrc_init() and IfxSrc_enable() are provided by the header IfxSrc.h.

Implementation

Configuring the LED

The LED is configured and toggled by controlling the port pin to which it is connected.

In the setup phase, the port pin is configured as output push-pull mode using the

function IfxPort_setPinMode().

The Interrupt Service Routine (ISR)

The ISR implemented in this example calls the iLLD function IfxPort_togglePin() to

toggle the LED‘s state.

The interrupt is triggered every time the timer T3 generates an underflow.

On underflow of timer T3, the Output Toggle Latch (T3OTL) is toggled and the value

of timer T2 or T4 is transferred into timer T3 depending on T3OTL value.

Both functions are provided by the iLLD header IfxPort.h.

Autres manuels pour GPT12 Timer Concatenation 1

Table des matières

Autres manuels Infineon Unité de contrôle

Infineon

Infineon SCU Power Down Idle 1 Manuel utilisateur

Infineon

Infineon SPI CPU 1 Manuel utilisateur

Infineon

Infineon REF-AIRCON-C302A-IM564 Manuel utilisateur

Infineon

Infineon ASCLIN Shell UART 1 Manuel utilisateur

Infineon

Infineon TLE9263BQXV33 Manuel utilisateur

Infineon

Infineon FF900R12IE4 Manuel

Infineon

Infineon GPT12 Timer Concatenation 1 Manuel utilisateur

Infineon

Infineon SMU IR Alarm 1 Manuel utilisateur

Infineon

Infineon SPI DMA 1 Manuel utilisateur

Infineon

Infineon SCU Reset Detection 1 Manuel utilisateur

Infineon

Infineon GTM ATOM PWM 1 Manuel utilisateur

Infineon

Infineon I2C Read Ext Device 1 Manuel utilisateur

Infineon

Infineon IM393 Series Instructions d'installation et d'utilisation

Infineon

Infineon Cypress CYBLE-014008-00 Manuel utilisateur

Infineon

Infineon AIROC CYW20829B0-P4TAI100 Manuel utilisateur

Infineon

Infineon Cypress EZ-BLE CYBLE-022001-00 Manuel utilisateur

Infineon

Infineon CCU6 PWM Capture 1 Manuel utilisateur

Infineon

Infineon XMC1000 Manuel utilisateur

Infineon

Infineon FCE CRC 1 Manuel utilisateur

Infineon

Infineon PWM Buzzer 1 Manuel utilisateur

Infineon

Infineon ERU Interrupt 1 Manuel utilisateur

Infineon

Infineon CCU6 Interrupt 1 Manuel utilisateur

Infineon

Infineon Easy 1B Manuel utilisateur

Infineon

Infineon CCU6 PWM Capture 1 Manuel utilisateur

Manuels Unité de contrôle populaires d'autres marques

Festo

Festo Compact Performance CP-FB6-E Manuel de la liste des pièces

Elo TouchSystems

Elo TouchSystems DMS-SA19P-EXTME Manuel utilisateur

JS Automation

JS Automation MPC3034A Manuel utilisateur

JAUDT

JAUDT SW GII 6406 Series Guide rapide

Spektrum

Spektrum Air Module System Manuel utilisateur

BOC Edwards

BOC Edwards Q Series Manuel utilisateur

KHADAS

KHADAS BT Magic Manuel utilisateur

Etherma

Etherma eNEXHO-IL Manuel utilisateur

PMFoundations

PMFoundations Attenuverter Manuel utilisateur

GEA

GEA VARIVENT Manuel utilisateur

Walther Systemtechnik

Walther Systemtechnik VMS-05 Manuel utilisateur

Altronix

Altronix LINQ8PD Instructions de montage

Eaton

Eaton Powerware Series Manuel utilisateur

WAGO

WAGO 750-407/040-000 Manuel utilisateur

Sony

Sony CCU-590 Manuel utilisateur

Graco

Graco 25D614 Manuel utilisateur

Task Force Tips

Task Force Tips YE-RF-900 Manuel de programmation

Shini

Shini SPV-U Series Manuel utilisateur