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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/us_ticker.c@460:3bcf9be0332c, 2015-02-02 (annotated)

Committer:
mbed_official
Date:
Mon Feb 02 11:30:07 2015 +0000
Revision:
460:3bcf9be0332c
Parent:
437:0b72c0f86db6
Child:
482:d9a48e768ce0
Synchronized with git revision c53fab9e3c2bcc48a6431a4222a43197c18a8c7b



Full URL: https://github.com/mbedmicro/mbed/commit/c53fab9e3c2bcc48a6431a4222a43197c18a8c7b/



RZ_A1H - Add some function and fix some bugs.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 390:35c2c1cf29cd 1 /* mbed Microcontroller Library
mbed_official 390:35c2c1cf29cd 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 390:35c2c1cf29cd 3 *
mbed_official 390:35c2c1cf29cd 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 390:35c2c1cf29cd 5 * you may not use this file except in compliance with the License.
mbed_official 390:35c2c1cf29cd 6 * You may obtain a copy of the License at
mbed_official 390:35c2c1cf29cd 7 *
mbed_official 390:35c2c1cf29cd 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 390:35c2c1cf29cd 9 *
mbed_official 390:35c2c1cf29cd 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 390:35c2c1cf29cd 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 390:35c2c1cf29cd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 390:35c2c1cf29cd 13 * See the License for the specific language governing permissions and
mbed_official 390:35c2c1cf29cd 14 * limitations under the License.
mbed_official 390:35c2c1cf29cd 15 */
mbed_official 390:35c2c1cf29cd 16 #include <stddef.h>
mbed_official 390:35c2c1cf29cd 17 #include "us_ticker_api.h"
mbed_official 390:35c2c1cf29cd 18 #include "PeripheralNames.h"
mbed_official 430:d406b7919023 19 #include "ostm_iodefine.h"
mbed_official 430:d406b7919023 20
mbed_official 430:d406b7919023 21 #include "RZ_A1_Init.h"
mbed_official 430:d406b7919023 22 #include "MBRZA1H.h"
mbed_official 390:35c2c1cf29cd 23
mbed_official 430:d406b7919023 24 #define US_TICKER_TIMER_IRQn (OSTMI1TINT_IRQn)
mbed_official 430:d406b7919023 25 #define CPG_STBCR5_BIT_MSTP50 (0x01u) /* OSTM1 */
mbed_official 430:d406b7919023 26
mbed_official 430:d406b7919023 27 #define US_TICKER_CLOCK_US_DEV (1000000)
mbed_official 390:35c2c1cf29cd 28
mbed_official 390:35c2c1cf29cd 29 int us_ticker_inited = 0;
mbed_official 430:d406b7919023 30 static double count_clock = 0;
mbed_official 437:0b72c0f86db6 31 static uint32_t last_read = 0;
mbed_official 437:0b72c0f86db6 32 static uint32_t wrap_arround = 0;
mbed_official 390:35c2c1cf29cd 33
mbed_official 390:35c2c1cf29cd 34 void us_ticker_interrupt(void) {
mbed_official 390:35c2c1cf29cd 35 us_ticker_irq_handler();
mbed_official 390:35c2c1cf29cd 36 }
mbed_official 390:35c2c1cf29cd 37
mbed_official 390:35c2c1cf29cd 38 void us_ticker_init(void) {
mbed_official 390:35c2c1cf29cd 39 if (us_ticker_inited) return;
mbed_official 390:35c2c1cf29cd 40 us_ticker_inited = 1;
mbed_official 437:0b72c0f86db6 41
mbed_official 430:d406b7919023 42 /* set Counter Clock(us) */
mbed_official 430:d406b7919023 43 if (false == RZ_A1_IsClockMode0()) {
mbed_official 437:0b72c0f86db6 44 count_clock = ((double)CM1_RENESAS_RZ_A1_P0_CLK / (double)US_TICKER_CLOCK_US_DEV);
mbed_official 430:d406b7919023 45 } else {
mbed_official 437:0b72c0f86db6 46 count_clock = ((double)CM0_RENESAS_RZ_A1_P0_CLK / (double)US_TICKER_CLOCK_US_DEV);
mbed_official 430:d406b7919023 47 }
mbed_official 430:d406b7919023 48
mbed_official 390:35c2c1cf29cd 49 /* Power Control for Peripherals */
mbed_official 430:d406b7919023 50 CPGSTBCR5 &= ~(CPG_STBCR5_BIT_MSTP50); /* enable OSTM1 clock */
mbed_official 390:35c2c1cf29cd 51
mbed_official 390:35c2c1cf29cd 52 // timer settings
mbed_official 430:d406b7919023 53 OSTM1TT = 0x01; /* Stop the counter and clears the OSTM1TE bit. */
mbed_official 430:d406b7919023 54 OSTM1CTL = 0x02; /* Free running timer mode. Interrupt disabled when star counter */
mbed_official 390:35c2c1cf29cd 55
mbed_official 430:d406b7919023 56 OSTM1TS = 0x1; /* Start the counter and sets the OSTM0TE bit. */
mbed_official 390:35c2c1cf29cd 57
mbed_official 390:35c2c1cf29cd 58 // INTC settings
mbed_official 430:d406b7919023 59 InterruptHandlerRegister(US_TICKER_TIMER_IRQn, (void (*)(uint32_t))us_ticker_interrupt);
mbed_official 430:d406b7919023 60 GIC_SetPriority(US_TICKER_TIMER_IRQn, 5);
mbed_official 430:d406b7919023 61 GIC_EnableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 390:35c2c1cf29cd 62 }
mbed_official 390:35c2c1cf29cd 63
mbed_official 460:3bcf9be0332c 64 uint64_t us_ticker_read64() {
mbed_official 390:35c2c1cf29cd 65 uint32_t val;
mbed_official 460:3bcf9be0332c 66 volatile uint64_t val64;
mbed_official 460:3bcf9be0332c 67 int check_irq_masked;
mbed_official 460:3bcf9be0332c 68
mbed_official 460:3bcf9be0332c 69 check_irq_masked = __disable_irq();
mbed_official 437:0b72c0f86db6 70
mbed_official 390:35c2c1cf29cd 71 if (!us_ticker_inited)
mbed_official 390:35c2c1cf29cd 72 us_ticker_init();
mbed_official 437:0b72c0f86db6 73
mbed_official 430:d406b7919023 74 /* read counter */
mbed_official 430:d406b7919023 75 val = OSTM1CNT;
mbed_official 437:0b72c0f86db6 76 if ( last_read > val ) {
mbed_official 437:0b72c0f86db6 77 wrap_arround++;
mbed_official 437:0b72c0f86db6 78 }
mbed_official 437:0b72c0f86db6 79 last_read = val;
mbed_official 437:0b72c0f86db6 80 val64 = ((uint64_t)wrap_arround << 32) + val;
mbed_official 437:0b72c0f86db6 81
mbed_official 430:d406b7919023 82 /* clock to us */
mbed_official 460:3bcf9be0332c 83 val64 = val64 / count_clock;
mbed_official 460:3bcf9be0332c 84
mbed_official 460:3bcf9be0332c 85 if (!check_irq_masked) {
mbed_official 460:3bcf9be0332c 86 __enable_irq();
mbed_official 460:3bcf9be0332c 87 }
mbed_official 460:3bcf9be0332c 88
mbed_official 460:3bcf9be0332c 89 return val64;
mbed_official 460:3bcf9be0332c 90 }
mbed_official 460:3bcf9be0332c 91
mbed_official 460:3bcf9be0332c 92 uint32_t us_ticker_read() {
mbed_official 460:3bcf9be0332c 93 return (uint32_t)us_ticker_read64();
mbed_official 390:35c2c1cf29cd 94 }
mbed_official 390:35c2c1cf29cd 95
mbed_official 390:35c2c1cf29cd 96 void us_ticker_set_interrupt(timestamp_t timestamp) {
mbed_official 390:35c2c1cf29cd 97 // set match value
mbed_official 460:3bcf9be0332c 98 volatile uint64_t set_cmp_val = 0;
mbed_official 460:3bcf9be0332c 99 uint64_t timestamp_tmp;
mbed_official 460:3bcf9be0332c 100 int64_t timestamp_req;
mbed_official 460:3bcf9be0332c 101 int64_t timestamp_comp;
mbed_official 460:3bcf9be0332c 102 uint64_t timestamp_now = us_ticker_read64();
mbed_official 460:3bcf9be0332c 103
mbed_official 460:3bcf9be0332c 104 /* calc compare mach timestamp */
mbed_official 460:3bcf9be0332c 105 set_cmp_val = (timestamp_now & 0xFFFFFFFF00000000) + timestamp;
mbed_official 460:3bcf9be0332c 106
mbed_official 460:3bcf9be0332c 107 timestamp_tmp = (uint64_t)timestamp;
mbed_official 460:3bcf9be0332c 108 timestamp_req = (int64_t)timestamp_tmp;
mbed_official 460:3bcf9be0332c 109
mbed_official 460:3bcf9be0332c 110 timestamp_tmp = (uint64_t)(timestamp_now & 0x00000000FFFFFFFF);
mbed_official 460:3bcf9be0332c 111 timestamp_comp = (int64_t)timestamp_tmp;
mbed_official 460:3bcf9be0332c 112
mbed_official 460:3bcf9be0332c 113 if (timestamp_req <= timestamp_comp + 1) {
mbed_official 460:3bcf9be0332c 114 if (((timestamp_req - timestamp_comp) <= 1) && ((timestamp_req - timestamp_comp) >= -10)) {
mbed_official 460:3bcf9be0332c 115 /* This event was in the past */
mbed_official 460:3bcf9be0332c 116 us_ticker_irq_handler();
mbed_official 460:3bcf9be0332c 117 return;
mbed_official 460:3bcf9be0332c 118 } else {
mbed_official 460:3bcf9be0332c 119 /* This event is wrap arround */
mbed_official 460:3bcf9be0332c 120 set_cmp_val += 0x100000000;
mbed_official 460:3bcf9be0332c 121 }
mbed_official 460:3bcf9be0332c 122 }
mbed_official 460:3bcf9be0332c 123
mbed_official 460:3bcf9be0332c 124 /* calc compare mach timestamp */
mbed_official 460:3bcf9be0332c 125 set_cmp_val = set_cmp_val * count_clock;
mbed_official 460:3bcf9be0332c 126 OSTM1CMP = (uint32_t)(set_cmp_val & 0xffffffff);
mbed_official 430:d406b7919023 127 GIC_EnableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 390:35c2c1cf29cd 128 }
mbed_official 390:35c2c1cf29cd 129
mbed_official 390:35c2c1cf29cd 130 void us_ticker_disable_interrupt(void) {
mbed_official 430:d406b7919023 131 GIC_DisableIRQ(US_TICKER_TIMER_IRQn);
mbed_official 390:35c2c1cf29cd 132 }
mbed_official 390:35c2c1cf29cd 133
mbed_official 390:35c2c1cf29cd 134 void us_ticker_clear_interrupt(void) {
mbed_official 430:d406b7919023 135 /* There are no Flags of OSTM1 to clear here */
mbed_official 430:d406b7919023 136 /* Do Nothing */
mbed_official 390:35c2c1cf29cd 137 }