/* mbed Microcontroller Library * Copyright (c) 2006-2020 ARM Limited * SPDX-License-Identifier: Apache-2.0 * * 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. */ #include "us_ticker_api.h" #include "mbed_drv_cfg.h" #define SHIFT_NUM 5 /* P0/32 */ static int us_ticker_inited = 0; void us_ticker_init(void) { GIC_DisableIRQ(OSTMI1_IRQn); GIC_ClearPendingIRQ(OSTMI1_IRQn); /* Power Control for Peripherals */ volatile uint8_t dummy_buf; CPG.STBCR3.BYTE &= ~(0x20u); dummy_buf = CPG.STBCR3.BYTE; /* (Dummy read) */ (void)dummy_buf; if (us_ticker_inited) return; us_ticker_inited = 1; // timer settings OSTM1.OSTMnTT.BYTE = 0x01; /* Stop the counter and clears the OSTM1TE bit. */ OSTM1.OSTMnCTL.BYTE = 0x02; /* Free running timer mode. Interrupt disabled when star counter */ OSTM1.OSTMnTS.BYTE = 0x1; /* Start the counter and sets the OSTM0TE bit. */ // INTC settings InterruptHandlerRegister(OSTMI1_IRQn, (void (*)(uint32_t))us_ticker_irq_handler); GIC_SetPriority(OSTMI1_IRQn, 5); GIC_SetConfiguration(OSTMI1_IRQn, 3); } void us_ticker_free(void) { GIC_DisableIRQ(OSTMI1_IRQn); GIC_ClearPendingIRQ(OSTMI1_IRQn); /* Power Control for Peripherals */ volatile uint8_t dummy_buf; CPG.STBCR3.BYTE |= 0x20u; dummy_buf = CPG.STBCR3.BYTE; /* (Dummy read) */ (void)dummy_buf; } uint32_t us_ticker_read() { return (uint32_t)(OSTM1.OSTMnCNT.LONG >> SHIFT_NUM); } void us_ticker_set_interrupt(timestamp_t timestamp) { OSTM1.OSTMnCMP.LONG = (uint32_t)(timestamp << SHIFT_NUM); GIC_EnableIRQ(OSTMI1_IRQn); } void us_ticker_fire_interrupt(void) { GIC_SetPendingIRQ(OSTMI1_IRQn); GIC_EnableIRQ(OSTMI1_IRQn); } void us_ticker_disable_interrupt(void) { GIC_DisableIRQ(OSTMI1_IRQn); } void us_ticker_clear_interrupt(void) { GIC_ClearPendingIRQ(OSTMI1_IRQn); } const ticker_info_t* us_ticker_get_info() { static const ticker_info_t info = { (uint32_t)((float)RENESAS_RZ_A2_P0_CLK * 2 / (float)(1 << SHIFT_NUM) + 0.5f), (32 - SHIFT_NUM) }; return &info; }