GPT driver for LPC11xx (not tested yet).
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2794 35acf78f-673a-0410-8e92-d51de3d6d3f4master
gdisirio
parent
654bed7b71
commit
d17660452e
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@ -45,6 +45,18 @@
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* CAN driver system settings.
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*/
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/*
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* GPT driver system settings.
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*/
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#define LPC11xx_GPT_USE_CT16B0 TRUE
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#define LPC11xx_GPT_USE_CT16B1 TRUE
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#define LPC11xx_GPT_USE_CT32B0 TRUE
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#define LPC11xx_GPT_USE_CT32B1 TRUE
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#define LPC11xx_GPT_CT16B0_IRQ_PRIORITY 2
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#define LPC11xx_GPT_CT16B1_IRQ_PRIORITY 2
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#define LPC11xx_GPT_CT32B0_IRQ_PRIORITY 2
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#define LPC11xx_GPT_CT32B1_IRQ_PRIORITY 2
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/*
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* PWM driver system settings.
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*/
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@ -0,0 +1,341 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file LPC11xx/gpt_lld.c
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* @brief LPC11xx GPT subsystem low level driver source.
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*
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* @addtogroup GPT
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_GPT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief GPT1 driver identifier.
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* @note The driver GPT1 allocates the complex timer CT16B0 when enabled.
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*/
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#if LPC11xx_GPT_USE_CT16B0 || defined(__DOXYGEN__)
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GPTDriver GPTD1;
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#endif
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/**
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* @brief GPT2 driver identifier.
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* @note The driver GPT2 allocates the timer CT16B1 when enabled.
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*/
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#if LPC11xx_GPT_USE_CT16B1 || defined(__DOXYGEN__)
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GPTDriver GPTD2;
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#endif
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/**
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* @brief GPT3 driver identifier.
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* @note The driver GPT3 allocates the timer CT32B0 when enabled.
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*/
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#if LPC11xx_GPT_USE_CT32B0 || defined(__DOXYGEN__)
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GPTDriver GPTD3;
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#endif
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/**
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* @brief GPT4 driver identifier.
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* @note The driver GPT4 allocates the timer CT32B1 when enabled.
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*/
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#if LPC11xx_GPT_USE_CT32B1 || defined(__DOXYGEN__)
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GPTDriver GPTD4;
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#endif
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief Shared IRQ handler.
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*
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* @param[in] gptp pointer to a @p GPTDriver object
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*/
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static void gpt_lld_serve_interrupt(GPTDriver *gptp) {
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gptp->tmr->IR = 1; /* Clear interrupt on match MR0.*/
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if (gptp->state == GPT_ONESHOT) {
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gptp->state = GPT_READY; /* Back in GPT_READY state. */
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gpt_lld_stop_timer(gptp); /* Timer automatically stopped. */
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}
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gptp->config->callback(gptp);
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if LPC11xx_GPT_USE_CT16B0
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/**
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* @brief CT16B0 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(Vector80) {
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CH_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD1);
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CH_IRQ_EPILOGUE();
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}
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#endif /* LPC11xx_GPT_USE_CT16B0 */
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#if LPC11xx_GPT_USE_CT16B1
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/**
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* @brief CT16B1 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(Vector84) {
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CH_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD2);
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CH_IRQ_EPILOGUE();
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}
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#endif /* LPC11xx_GPT_USE_CT16B0 */
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#if LPC11xx_GPT_USE_CT32B0
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/**
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* @brief CT32B0 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(Vector88) {
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CH_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD3);
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CH_IRQ_EPILOGUE();
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}
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#endif /* LPC11xx_GPT_USE_CT32B0 */
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#if LPC11xx_GPT_USE_CT32B1
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/**
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* @brief CT32B1 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(Vector8C) {
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CH_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD4);
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CH_IRQ_EPILOGUE();
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}
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#endif /* LPC11xx_GPT_USE_CT32B1 */
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level GPT driver initialization.
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*
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* @notapi
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*/
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void gpt_lld_init(void) {
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#if LPC11xx_GPT_USE_CT16B0
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/* Driver initialization.*/
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GPTD1.tmr = LPC_TMR16B0;
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gptObjectInit(&GPTD1);
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#endif
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#if LPC11xx_GPT_USE_CT16B1
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/* Driver initialization.*/
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GPTD2.tmr = LPC_TMR16B1;
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gptObjectInit(&GPTD2);
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#endif
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#if LPC11xx_GPT_USE_CT32B0
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/* Driver initialization.*/
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GPTD3.tmr = LPC_TMR32B0;
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gptObjectInit(&GPTD3);
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#endif
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#if LPC11xx_GPT_USE_CT32B1
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/* Driver initialization.*/
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GPTD4.tmr = LPC_TMR32B1;
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gptObjectInit(&GPTD4);
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#endif
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}
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/**
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* @brief Configures and activates the GPT peripheral.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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*
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* @notapi
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*/
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void gpt_lld_start(GPTDriver *gptp) {
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uint32_t pr;
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if (gptp->state == GPT_STOP) {
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/* Clock activation.*/
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#if LPC11xx_GPT_USE_CT16B0
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if (&GPTD1 == gptp) {
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LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 7);
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NVICEnableVector(TIMER_16_0_IRQn, CORTEX_PRIORITY_MASK(2));
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}
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#endif
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#if LPC11xx_GPT_USE_CT16B1
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if (&GPTD2 == gptp) {
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LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 8);
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NVICEnableVector(TIMER_16_1_IRQn, CORTEX_PRIORITY_MASK(3));
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}
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#endif
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#if LPC11xx_GPT_USE_CT32B0
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if (&GPTD3 == gptp) {
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LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 9);
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NVICEnableVector(TIMER_32_0_IRQn, CORTEX_PRIORITY_MASK(2));
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}
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#endif
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#if LPC11xx_GPT_USE_CT32B1
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if (&GPTD4 == gptp) {
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LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 10);
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NVICEnableVector(TIMER_32_1_IRQn, CORTEX_PRIORITY_MASK(2));
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}
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#endif
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}
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/* Prescaler value calculation.*/
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pr = (uint16_t)((LPC11xx_SYSCLK / gptp->config->frequency) - 1);
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chDbgAssert(((uint32_t)(pr + 1) * gptp->config->frequency) == LPC11xx_SYSCLK,
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"gpt_lld_start(), #1", "invalid frequency");
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/* Timer configuration.*/
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gptp->tmr->PR = pr;
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gptp->tmr->IR = 1;
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gptp->tmr->MCR = 0;
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gptp->tmr->TCR = 0;
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}
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/**
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* @brief Deactivates the GPT peripheral.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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*
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* @notapi
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*/
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void gpt_lld_stop(GPTDriver *gptp) {
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if (gptp->state == GPT_READY) {
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gptp->tmr->MCR = 0;
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gptp->tmr->TCR = 0;
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#if LPC11xx_GPT_USE_CT16B0
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if (&GPTD1 == gptp) {
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NVICDisableVector(TIMER_16_0_IRQn);
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LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 7);
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}
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#endif
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#if LPC11xx_GPT_USE_CT16B1
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if (&GPTD2 == gptp) {
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NVICDisableVector(TIMER_16_1_IRQn);
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LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 8);
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}
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#endif
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#if LPC11xx_GPT_USE_CT32B0
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if (&GPTD3 == gptp) {
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NVICDisableVector(TIMER_32_0_IRQn);
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LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 9);
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}
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#endif
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#if LPC11xx_GPT_USE_CT32B1
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if (&GPTD4 == gptp) {
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NVICDisableVector(TIMER_32_1_IRQn);
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LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 10);
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}
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#endif
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}
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}
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/**
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* @brief Starts the timer in continuous mode.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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* @param[in] interval period in ticks
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*
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* @notapi
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*/
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void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) {
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gptp->tmr->MR0 = interval - 1;
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gptp->tmr->IR = 1;
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gptp->tmr->MCR = 3; /* IRQ and clr TC on match MR0. */
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gptp->tmr->TCR = 2; /* Reset counter and prescaler. */
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gptp->tmr->TCR = 1; /* Timer enabled. */
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}
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/**
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* @brief Stops the timer.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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*
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* @notapi
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*/
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void gpt_lld_stop_timer(GPTDriver *gptp) {
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gptp->tmr->IR = 1;
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gptp->tmr->MCR = 0;
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gptp->tmr->TCR = 0;
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}
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/**
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* @brief Starts the timer in one shot mode and waits for completion.
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* @details This function specifically polls the timer waiting for completion
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* in order to not have extra delays caused by interrupt servicing,
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* this function is only recommended for short delays.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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* @param[in] interval time interval in ticks
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*
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* @notapi
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*/
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void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval) {
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gptp->tmr->MR0 = interval - 1;
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gptp->tmr->IR = 1;
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gptp->tmr->MCR = 4; /* Stop TC on match MR0. */
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gptp->tmr->TCR = 2; /* Reset counter and prescaler. */
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gptp->tmr->TCR = 1; /* Timer enabled. */
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while (gptp->tmr->TCR & 1)
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;
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}
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#endif /* HAL_USE_GPT */
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/** @} */
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@ -0,0 +1,223 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
|
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it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
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ChibiOS/RT is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file LPC11xx/gpt_lld.h
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* @brief LPC11xx GPT subsystem low level driver header.
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*
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* @addtogroup GPT
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* @{
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*/
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#ifndef _GPT_LLD_H_
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#define _GPT_LLD_H_
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#if HAL_USE_GPT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief GPT1 driver enable switch.
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* @details If set to @p TRUE the support for GPT1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC11xx_GPT_USE_CT16B0) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_USE_CT16B0 TRUE
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#endif
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/**
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* @brief GPT2 driver enable switch.
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* @details If set to @p TRUE the support for GPT2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC11xx_GPT_USE_CT16B1) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_USE_CT16B1 TRUE
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#endif
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/**
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* @brief GPT3 driver enable switch.
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* @details If set to @p TRUE the support for GPT3 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC11xx_GPT_USE_CT32B0) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_USE_CT32B0 TRUE
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#endif
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/**
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* @brief GPT4 driver enable switch.
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* @details If set to @p TRUE the support for GPT4 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC11xx_GPT_USE_CT32B1) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_USE_CT32B1 TRUE
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#endif
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/**
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* @brief GPT1 interrupt priority level setting.
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*/
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#if !defined(LPC11xx_GPT_CT16B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_CT16B0_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT2 interrupt priority level setting.
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*/
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#if !defined(LPC11xx_GPT_CT16B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_CT16B1_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT3 interrupt priority level setting.
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*/
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#if !defined(LPC11xx_GPT_CT32B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_CT32B0_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT4 interrupt priority level setting.
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*/
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#if !defined(LPC11xx_GPT_CT32B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC11xx_GPT_CT32B1_IRQ_PRIORITY 2
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if !LPC11xx_GPT_USE_CT16B0 && !LPC11xx_GPT_USE_CT16B1 && \
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!LPC11xx_GPT_USE_CT32B0 && !LPC11xx_GPT_USE_CT32B1
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#error "GPT driver activated but no CT peripheral assigned"
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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||||
/**
|
||||
* @brief GPT frequency type.
|
||||
*/
|
||||
typedef uint32_t gptfreq_t;
|
||||
|
||||
/**
|
||||
* @brief GPT counter type.
|
||||
*/
|
||||
typedef uint32_t gptcnt_t;
|
||||
|
||||
/**
|
||||
* @brief Type of a structure representing a GPT driver.
|
||||
*/
|
||||
typedef struct GPTDriver GPTDriver;
|
||||
|
||||
/**
|
||||
* @brief GPT notification callback type.
|
||||
*
|
||||
* @param[in] gptp pointer to a @p GPTDriver object
|
||||
*/
|
||||
typedef void (*gptcallback_t)(GPTDriver *gptp);
|
||||
|
||||
/**
|
||||
* @brief Driver configuration structure.
|
||||
* @note It could be empty on some architectures.
|
||||
*/
|
||||
typedef struct {
|
||||
/**
|
||||
* @brief Timer clock in Hz.
|
||||
* @note The low level can use assertions in order to catch invalid
|
||||
* frequency specifications.
|
||||
*/
|
||||
gptfreq_t frequency;
|
||||
/**
|
||||
* @brief Timer callback pointer.
|
||||
* @note This callback is invoked on GPT counter events.
|
||||
*/
|
||||
gptcallback_t callback;
|
||||
/* End of the mandatory fields.*/
|
||||
} GPTConfig;
|
||||
|
||||
/**
|
||||
* @brief Structure representing a GPT driver.
|
||||
*/
|
||||
struct GPTDriver {
|
||||
/**
|
||||
* @brief Driver state.
|
||||
*/
|
||||
gptstate_t state;
|
||||
/**
|
||||
* @brief Current configuration data.
|
||||
*/
|
||||
const GPTConfig *config;
|
||||
/* End of the mandatory fields.*/
|
||||
/**
|
||||
* @brief Timer base clock.
|
||||
*/
|
||||
uint32_t clock;
|
||||
/**
|
||||
* @brief Pointer to the CTxxBy registers block.
|
||||
*/
|
||||
LPC_TMR_TypeDef *tmr;
|
||||
};
|
||||
|
||||
/*===========================================================================*/
|
||||
/* Driver macros. */
|
||||
/*===========================================================================*/
|
||||
|
||||
/*===========================================================================*/
|
||||
/* External declarations. */
|
||||
/*===========================================================================*/
|
||||
|
||||
#if LPC11xx_GPT_USE_CT16B0 && !defined(__DOXYGEN__)
|
||||
extern GPTDriver GPTD1;
|
||||
#endif
|
||||
|
||||
#if LPC11xx_GPT_USE_CT16B1 && !defined(__DOXYGEN__)
|
||||
extern GPTDriver GPTD2;
|
||||
#endif
|
||||
|
||||
#if LPC11xx_GPT_USE_CT32B0 && !defined(__DOXYGEN__)
|
||||
extern GPTDriver GPTD3;
|
||||
#endif
|
||||
|
||||
#if LPC11xx_GPT_USE_CT32B1 && !defined(__DOXYGEN__)
|
||||
extern GPTDriver GPTD4;
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
void gpt_lld_init(void);
|
||||
void gpt_lld_start(GPTDriver *gptp);
|
||||
void gpt_lld_stop(GPTDriver *gptp);
|
||||
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t period);
|
||||
void gpt_lld_stop_timer(GPTDriver *gptp);
|
||||
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval);
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* HAL_USE_GPT */
|
||||
|
||||
#endif /* _GPT_LLD_H_ */
|
||||
|
||||
/** @} */
|
||||
|
|
@ -42,6 +42,24 @@
|
|||
* @ingroup LPC11xx
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup LPC11xx_GPT LPC11xx GPT Support
|
||||
* @details The LPC11xx GPT driver uses the CTxxBy peripherals.
|
||||
*
|
||||
* @section lpc11xx_gpt_1 Supported HW resources
|
||||
* - CT16B0.
|
||||
* - CT16B1.
|
||||
* - CT32B0.
|
||||
* - CT32B1.
|
||||
* .
|
||||
* @section lpc11xx_gpt_2 LPC11xx GPT driver implementation features
|
||||
* - Each timer can be independently enabled and programmed. Unused
|
||||
* peripherals are left in low power mode.
|
||||
* - Programmable TIMx interrupts priority level.
|
||||
* .
|
||||
* @ingroup LPC11xx
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup LPC11xx_PAL LPC11xx PAL Support
|
||||
* @details The LPC11xx PAL driver uses the GPIO peripherals.
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
# List of all the LPC11xx platform files.
|
||||
PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/LPC11xx/hal_lld.c \
|
||||
${CHIBIOS}/os/hal/platforms/LPC11xx/gpt_lld.c \
|
||||
${CHIBIOS}/os/hal/platforms/LPC11xx/pal_lld.c \
|
||||
${CHIBIOS}/os/hal/platforms/LPC11xx/serial_lld.c \
|
||||
${CHIBIOS}/os/hal/platforms/LPC11xx/spi_lld.c
|
||||
|
|
|
|||
|
|
@ -103,7 +103,7 @@
|
|||
- NEW: Added STM32 USB CDC loopback test application.
|
||||
- NEW: Added new GPT driver model, General Purpose Timer. The driver
|
||||
allows to access the available timers in an abstract way.
|
||||
- NEW: GTP driver implementation for STM32.
|
||||
- NEW: GTP driver implementation for STM32 and LPC11xx.
|
||||
- NEW: Added STM32 GPT test application.
|
||||
- NEW: Implemented new event IO_TRANSMISSION_END in the generic serial
|
||||
driver. This event marks the physical transmission end of a data stream.
|
||||
|
|
|
|||
Loading…
Reference in New Issue