diff options
Diffstat (limited to 'os/hal/platforms/LPC8xx/gpt_lld.c')
| -rw-r--r-- | os/hal/platforms/LPC8xx/gpt_lld.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/os/hal/platforms/LPC8xx/gpt_lld.c b/os/hal/platforms/LPC8xx/gpt_lld.c deleted file mode 100644 index 44601272b..000000000 --- a/os/hal/platforms/LPC8xx/gpt_lld.c +++ /dev/null @@ -1,278 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file LPC8xx/gpt_lld.c
- * @brief LPC8xx GPT subsystem low level driver source.
- *
- * @addtogroup GPT
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_GPT || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/**
- * @brief GPT1 driver identifier.
- * @note The driver GPT1 allocates MRT channel0 when enabled.
- */
-#if LPC8xx_GPT_USE_MRT0 || defined(__DOXYGEN__)
-GPTDriver GPTD1;
-#endif
-
-/**
- * @brief GPT2 driver identifier.
- * @note The driver GPT1 allocates MRT channel1 when enabled.
- */
-#if LPC8xx_GPT_USE_MRT1 || defined(__DOXYGEN__)
-GPTDriver GPTD2;
-#endif
-
-/**
- * @brief GPT3 driver identifier.
- * @note The driver GPT1 allocates MRT channel2 when enabled.
- */
-#if LPC8xx_GPT_USE_MRT2 || defined(__DOXYGEN__)
-GPTDriver GPTD3;
-#endif
-
-/**
- * @brief GPT4 driver identifier.
- * @note The driver GPT1 allocates MRT channel3 when enabled.
- */
-#if LPC8xx_GPT_USE_MRT3 || defined(__DOXYGEN__)
-GPTDriver GPTD4;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-static uint32_t clk_enabled;
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-/**
- * @brief Shared IRQ handler.
- *
- * @param[in] gptp pointer to a @p GPTDriver object
- * @param[in] irq_flag irq flag bit
- */
-
-static void gpt_lld_serve_interrupt( GPTDriver *gptp ) {
-
- if (gptp->tmr->STAT & 0x01) {
- gptp->tmr->STAT |= 0x01;
-
- if (gptp->state == GPT_ONESHOT) {
- gptp->state = GPT_READY; /* Back in GPT_READY state. */
- }
- gptp->config->callback(gptp);
- }
- return;
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/**
-
- * @brief MRT IRQ handler.
- *
- */
-CH_IRQ_HANDLER(Vector68) {
- CH_IRQ_PROLOGUE();
-
-#if LPC8xx_GPT_USE_MRT0
- gpt_lld_serve_interrupt( &GPTD1 );
-#endif
-
-#if LPC8xx_GPT_USE_MRT1
- gpt_lld_serve_interrupt( &GPTD2 );
-#endif
-
-#if LPC8xx_GPT_USE_MRT2
- gpt_lld_serve_interrupt( &GPTD3 );
-#endif
-
-#if LPC8xx_GPT_USE_MRT3
- gpt_lld_serve_interrupt( &GPTD4 );
-#endif
-
- CH_IRQ_EPILOGUE();
-}
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level GPT driver initialization.
- *
- * @notapi
- */
-void gpt_lld_init(void) {
-
-#if LPC8xx_GPT_USE_MRT0
- GPTD1.tmr = &(LPC_MRT->Channel[0]);
- gptObjectInit(&GPTD1);
- GPTD1.mask = (1<<0);
-#endif
-
-#if LPC8xx_GPT_USE_MRT1
- GPTD2.tmr = &(LPC_MRT->Channel[1]);
- gptObjectInit(&GPTD2);
- GPTD1.mask = (1<<1);
-#endif
-
-#if LPC8xx_GPT_USE_MRT2
- GPTD3.tmr = &(LPC_MRT->Channel[2]);
- gptObjectInit(&GPTD3);
- GPTD1.mask = (1<<2);
-#endif
-
-#if LPC8xx_GPT_USE_MRT3
- GPTD4.tmr = &(LPC_MRT->Channel[3]);
- gptObjectInit(&GPTD4);
- GPTD1.mask = (1<<3);
-#endif
-
- clk_enabled = FALSE;
- return;
-}
-
-/**
- * @brief Configures and activates a GPT channel.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_start(GPTDriver *gptp) {
-
- if( !clk_enabled ) {
-
- /* Enable clock & reset MRT */
- LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10);
- LPC_SYSCON->PRESETCTRL &= ~(1<<7);
- LPC_SYSCON->PRESETCTRL |= (1<<7);
-
- nvicEnableVector(MRT_IRQn,
- CORTEX_PRIORITY_MASK(LPC8xx_GPT_MRT_IRQ_PRIORITY));
-
- clk_enabled |= gptp->mask;
- }
-
- /* Prescaler value calculation.*/
- gptp->pr = (LPC8xx_SYSCLK / gptp->config->frequency);
- chDbgAssert((gptp->pr * gptp->config->frequency) == LPC8xx_SYSCLK,
- "gpt_lld_start(), #1", "invalid frequency");
-
- /* MRT Channel configuration.*/
- gptp->tmr->CTRL = 0;
- gptp->tmr->STAT |= 1;
-
-}
-
-/**
- * @brief Deactivates a GPT channel.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_stop(GPTDriver *gptp) {
-
- /* Shared peripheral -
- mark this channel as disabled */
- clk_enabled &= ~gptp->mask;
-
- /* All channels disabled? */
- if( !clk_enabled )
- {
- /* Disable periheral */
- nvicDisableVector(MRT_IRQn);
- LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<10);
- }
-
- return;
-}
-
-/**
- * @brief Starts the timer in continuous/One shot mode.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- * @param[in] interval period in ticks
- *
- * @notapi
- */
-void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) {
-
- gptp->tmr->INTVAL = (1<<31)|((interval*gptp->pr) - 1);
-
- if (gptp->state == GPT_ONESHOT)
- gptp->tmr->CTRL = (1<<1)|1;
- else
- gptp->tmr->CTRL = 1;
-}
-
-/**
- * @brief Stops the timer.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_stop_timer(GPTDriver *gptp) {
-
- gptp->tmr->INTVAL = (1<<31);
- gptp->tmr->CTRL = 0;
- gptp->tmr->STAT |= 1;
-}
-
-/**
- * @brief Starts the timer in one shot mode and waits for completion.
- * @details This function specifically polls the timer waiting for completion
- * in order to not have extra delays caused by interrupt servicing,
- * this function is only recommended for short delays.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- * @param[in] interval time interval in ticks
- *
- * @notapi
- */
-void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval) {
-
- gptp->tmr->INTVAL = (1<<31)|((interval*gptp->pr) - 1);
- gptp->tmr->CTRL = (1<<1);
-
- while (gptp->tmr->STAT & (1<<1))
- ;
-
- gptp->tmr->CTRL = 0;
- gptp->tmr->STAT |= 1;
-}
-
-#endif /* HAL_USE_GPT */
-
-/** @} */
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