mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_RENESAS/TARGET_RZ_A1XX/us_ticker.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 181:57724642e740 1 /* mbed Microcontroller Library
AnnaBridge 181:57724642e740 2 * Copyright (c) 2006-2013 ARM Limited
AnnaBridge 181:57724642e740 3 *
AnnaBridge 181:57724642e740 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 181:57724642e740 5 * you may not use this file except in compliance with the License.
AnnaBridge 181:57724642e740 6 * You may obtain a copy of the License at
AnnaBridge 181:57724642e740 7 *
AnnaBridge 181:57724642e740 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 181:57724642e740 9 *
AnnaBridge 181:57724642e740 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 181:57724642e740 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 181:57724642e740 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 181:57724642e740 13 * See the License for the specific language governing permissions and
AnnaBridge 181:57724642e740 14 * limitations under the License.
AnnaBridge 181:57724642e740 15 */
AnnaBridge 181:57724642e740 16 #include "us_ticker_api.h"
Anna Bridge 186:707f6e361f3e 17 #include "mbed_drv_cfg.h"
AnnaBridge 181:57724642e740 18
Anna Bridge 186:707f6e361f3e 19 #define SHIFT_NUM 5 /* P0/32 */
AnnaBridge 181:57724642e740 20
Anna Bridge 186:707f6e361f3e 21 static int us_ticker_inited = 0;
AnnaBridge 181:57724642e740 22
Anna Bridge 186:707f6e361f3e 23 void us_ticker_init(void)
Anna Bridge 186:707f6e361f3e 24 {
Anna Bridge 186:707f6e361f3e 25 GIC_DisableIRQ(OSTMI1TINT_IRQn);
Anna Bridge 186:707f6e361f3e 26 GIC_ClearPendingIRQ(OSTMI1TINT_IRQn);
AnnaBridge 181:57724642e740 27
AnnaBridge 181:57724642e740 28 /* Power Control for Peripherals */
AnnaBridge 181:57724642e740 29 CPGSTBCR5 &= ~(CPG_STBCR5_BIT_MSTP50); /* enable OSTM1 clock */
AnnaBridge 181:57724642e740 30
Anna Bridge 186:707f6e361f3e 31 if (us_ticker_inited) return;
Anna Bridge 186:707f6e361f3e 32 us_ticker_inited = 1;
Anna Bridge 186:707f6e361f3e 33
AnnaBridge 181:57724642e740 34 // timer settings
AnnaBridge 181:57724642e740 35 OSTM1TT = 0x01; /* Stop the counter and clears the OSTM1TE bit. */
AnnaBridge 181:57724642e740 36 OSTM1CTL = 0x02; /* Free running timer mode. Interrupt disabled when star counter */
AnnaBridge 181:57724642e740 37
Anna Bridge 186:707f6e361f3e 38 OSTM1TS = 0x1; /* Start the counter and sets the OSTM0TE bit. */
AnnaBridge 181:57724642e740 39
AnnaBridge 181:57724642e740 40 // INTC settings
Anna Bridge 186:707f6e361f3e 41 InterruptHandlerRegister(OSTMI1TINT_IRQn, (void (*)(uint32_t))us_ticker_irq_handler);
Anna Bridge 186:707f6e361f3e 42 GIC_SetPriority(OSTMI1TINT_IRQn, 5);
Anna Bridge 186:707f6e361f3e 43 GIC_SetConfiguration(OSTMI1TINT_IRQn, 3);
AnnaBridge 181:57724642e740 44 }
AnnaBridge 181:57724642e740 45
Anna Bridge 186:707f6e361f3e 46 void us_ticker_free(void)
Anna Bridge 186:707f6e361f3e 47 {
Anna Bridge 186:707f6e361f3e 48 GIC_DisableIRQ(OSTMI1TINT_IRQn);
Anna Bridge 186:707f6e361f3e 49 GIC_ClearPendingIRQ(OSTMI1TINT_IRQn);
AnnaBridge 181:57724642e740 50
Anna Bridge 186:707f6e361f3e 51 /* Power Control for Peripherals */
Anna Bridge 186:707f6e361f3e 52 CPGSTBCR5 |= (CPG_STBCR5_BIT_MSTP50); /* disable OSTM1 clock */
AnnaBridge 181:57724642e740 53 }
AnnaBridge 181:57724642e740 54
Anna Bridge 186:707f6e361f3e 55 uint32_t us_ticker_read()
Anna Bridge 186:707f6e361f3e 56 {
Anna Bridge 186:707f6e361f3e 57 return (uint32_t)(OSTM1CNT >> SHIFT_NUM);
AnnaBridge 181:57724642e740 58 }
AnnaBridge 181:57724642e740 59
Anna Bridge 186:707f6e361f3e 60 void us_ticker_set_interrupt(timestamp_t timestamp)
Anna Bridge 186:707f6e361f3e 61 {
Anna Bridge 186:707f6e361f3e 62 OSTM1CMP = (uint32_t)(timestamp << SHIFT_NUM);
Anna Bridge 186:707f6e361f3e 63 GIC_EnableIRQ(OSTMI1TINT_IRQn);
AnnaBridge 181:57724642e740 64 }
AnnaBridge 181:57724642e740 65
Anna Bridge 186:707f6e361f3e 66 void us_ticker_fire_interrupt(void)
Anna Bridge 186:707f6e361f3e 67 {
Anna Bridge 186:707f6e361f3e 68 GIC_SetPendingIRQ(OSTMI1TINT_IRQn);
Anna Bridge 186:707f6e361f3e 69 GIC_EnableIRQ(OSTMI1TINT_IRQn);
AnnaBridge 181:57724642e740 70 }
AnnaBridge 181:57724642e740 71
Anna Bridge 186:707f6e361f3e 72 void us_ticker_disable_interrupt(void)
Anna Bridge 186:707f6e361f3e 73 {
Anna Bridge 186:707f6e361f3e 74 GIC_DisableIRQ(OSTMI1TINT_IRQn);
Anna Bridge 186:707f6e361f3e 75 }
AnnaBridge 181:57724642e740 76
Anna Bridge 186:707f6e361f3e 77 void us_ticker_clear_interrupt(void)
Anna Bridge 186:707f6e361f3e 78 {
Anna Bridge 186:707f6e361f3e 79 GIC_ClearPendingIRQ(OSTMI1TINT_IRQn);
AnnaBridge 181:57724642e740 80 }
AnnaBridge 181:57724642e740 81
Anna Bridge 186:707f6e361f3e 82 const ticker_info_t* us_ticker_get_info()
Anna Bridge 186:707f6e361f3e 83 {
Anna Bridge 186:707f6e361f3e 84 static const ticker_info_t info = {
Anna Bridge 186:707f6e361f3e 85 (uint32_t)((float)RENESAS_RZ_A1_P0_CLK / (float)(1 << SHIFT_NUM) + 0.5f),
Anna Bridge 186:707f6e361f3e 86 (32 - SHIFT_NUM)
Anna Bridge 186:707f6e361f3e 87 };
Anna Bridge 186:707f6e361f3e 88 return &info;
AnnaBridge 181:57724642e740 89 }
AnnaBridge 181:57724642e740 90