mirror of https://github.com/ARMmbed/mbed-os.git
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if DEVICE_LPTICKER
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#include "lp_ticker_api.h"
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#include "mtu2_iobitmask.h"
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#include "mbed_drv_cfg.h"
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#include "mtu2.h"
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#if (LP_TICKER_MTU2_CH == 2)
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#define LP_TICKER_TIMER_IRQn (TGI2A_IRQn)
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#define MTU2TCR (MTU2TCR_2)
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#define MTU2TCNT (MTU2TCNT_2)
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#define MTU2TIER (MTU2TIER_2)
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#define MTU2TGRA (MTU2TGRA_2)
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#define MTU2TSR (MTU2TSR_2)
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#define MTU2_TSTR_CST MTU2_TSTR_CST2
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#define MTU2_TCR_TPSC (0x07)
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#elif (LP_TICKER_MTU2_CH == 3)
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#define LP_TICKER_TIMER_IRQn (TGI3A_IRQn)
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#define MTU2TCR (MTU2TCR_3)
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#define MTU2TCNT (MTU2TCNT_3)
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#define MTU2TIER (MTU2TIER_3)
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#define MTU2TGRA (MTU2TGRA_3)
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#define MTU2TSR (MTU2TSR_3)
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#define MTU2_TSTR_CST MTU2_TSTR_CST3
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#define MTU2_TCR_TPSC (0x05)
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#elif (LP_TICKER_MTU2_CH == 4)
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#define LP_TICKER_TIMER_IRQn (TGI4A_IRQn)
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#define MTU2TCR (MTU2TCR_4)
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#define MTU2TCNT (MTU2TCNT_4)
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#define MTU2TIER (MTU2TIER_4)
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#define MTU2TGRA (MTU2TGRA_4)
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#define MTU2TSR (MTU2TSR_4)
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#define MTU2_TSTR_CST MTU2_TSTR_CST4
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#define MTU2_TCR_TPSC (0x05)
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#else
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#error "Invalid number : LP_TICKER_MTU2_CH (2-4)"
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#endif
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static int lp_ticker_inited = 0;
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void lp_ticker_init(void)
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{
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GIC_DisableIRQ(LP_TICKER_TIMER_IRQn);
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GIC_ClearPendingIRQ(LP_TICKER_TIMER_IRQn);
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/* Power Control for Peripherals */
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mtu2_init();
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if (lp_ticker_inited) return;
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lp_ticker_inited = 1;
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MTU2TCR = MTU2_TCR_TPSC;
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MTU2TSTR |= MTU2_TSTR_CST;
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MTU2TIER |= MTU2_TIER_n_TGIEA;
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// INTC settings
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InterruptHandlerRegister(LP_TICKER_TIMER_IRQn, (void (*)(uint32_t))lp_ticker_irq_handler);
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GIC_SetPriority(LP_TICKER_TIMER_IRQn, 5);
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GIC_SetConfiguration(LP_TICKER_TIMER_IRQn, 3);
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}
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void lp_ticker_free(void)
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{
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GIC_DisableIRQ(LP_TICKER_TIMER_IRQn);
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GIC_ClearPendingIRQ(LP_TICKER_TIMER_IRQn);
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MTU2TIER &= ~MTU2_TIER_n_TGIEA;
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lp_ticker_inited = 0;
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mtu2_free();
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}
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uint32_t lp_ticker_read()
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{
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return (uint32_t)MTU2TCNT;
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}
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void lp_ticker_set_interrupt(timestamp_t timestamp)
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{
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MTU2TSR = (MTU2TSR & 0xFE);
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MTU2TGRA = (uint16_t)timestamp;
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GIC_EnableIRQ(LP_TICKER_TIMER_IRQn);
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}
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void lp_ticker_fire_interrupt(void)
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{
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GIC_SetPendingIRQ(LP_TICKER_TIMER_IRQn);
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GIC_EnableIRQ(LP_TICKER_TIMER_IRQn);
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}
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void lp_ticker_disable_interrupt(void)
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{
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GIC_DisableIRQ(LP_TICKER_TIMER_IRQn);
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}
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void lp_ticker_clear_interrupt(void)
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{
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MTU2TSR = (MTU2TSR & 0xFE);
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GIC_ClearPendingIRQ(LP_TICKER_TIMER_IRQn);
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}
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const ticker_info_t* lp_ticker_get_info()
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{
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static const ticker_info_t info = {
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(uint32_t)((float)RENESAS_RZ_A1_P0_CLK / 1024.0f + 0.5f),
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16
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};
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return &info;
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}
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#endif // DEVICE_LPTICKER
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