ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_NUVOTON/TARGET_M451/sleep.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2015-2016 Nuvoton
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16
group-onsemi 0:098463de4c5d 17 #include "sleep_api.h"
group-onsemi 0:098463de4c5d 18 #include "serial_api.h"
group-onsemi 0:098463de4c5d 19 #include "lp_ticker_api.h"
group-onsemi 0:098463de4c5d 20
group-onsemi 0:098463de4c5d 21 #if DEVICE_SLEEP
group-onsemi 0:098463de4c5d 22
group-onsemi 0:098463de4c5d 23 #include "cmsis.h"
group-onsemi 0:098463de4c5d 24 #include "device.h"
group-onsemi 0:098463de4c5d 25 #include "objects.h"
group-onsemi 0:098463de4c5d 26 #include "PeripheralPins.h"
group-onsemi 0:098463de4c5d 27
group-onsemi 0:098463de4c5d 28 void us_ticker_prepare_sleep(struct sleep_s *obj);
group-onsemi 0:098463de4c5d 29 void us_ticker_wakeup_from_sleep(struct sleep_s *obj);
group-onsemi 0:098463de4c5d 30 static void mbed_enter_sleep(struct sleep_s *obj);
group-onsemi 0:098463de4c5d 31 static void mbed_exit_sleep(struct sleep_s *obj);
group-onsemi 0:098463de4c5d 32
group-onsemi 0:098463de4c5d 33 int serial_allow_powerdown(void);
group-onsemi 0:098463de4c5d 34 int spi_allow_powerdown(void);
group-onsemi 0:098463de4c5d 35 int i2c_allow_powerdown(void);
group-onsemi 0:098463de4c5d 36 int pwmout_allow_powerdown(void);
group-onsemi 0:098463de4c5d 37
group-onsemi 0:098463de4c5d 38 /**
group-onsemi 0:098463de4c5d 39 * Enter Idle mode.
group-onsemi 0:098463de4c5d 40 */
group-onsemi 0:098463de4c5d 41 void sleep(void)
group-onsemi 0:098463de4c5d 42 {
group-onsemi 0:098463de4c5d 43 struct sleep_s sleep_obj;
group-onsemi 0:098463de4c5d 44 sleep_obj.powerdown = 0;
group-onsemi 0:098463de4c5d 45 mbed_enter_sleep(&sleep_obj);
group-onsemi 0:098463de4c5d 46 mbed_exit_sleep(&sleep_obj);
group-onsemi 0:098463de4c5d 47 }
group-onsemi 0:098463de4c5d 48
group-onsemi 0:098463de4c5d 49 /**
group-onsemi 0:098463de4c5d 50 * Enter Power-down mode while no peripheral is active; otherwise, enter Idle mode.
group-onsemi 0:098463de4c5d 51 */
group-onsemi 0:098463de4c5d 52 void deepsleep(void)
group-onsemi 0:098463de4c5d 53 {
group-onsemi 0:098463de4c5d 54 struct sleep_s sleep_obj;
group-onsemi 0:098463de4c5d 55 sleep_obj.powerdown = 1;
group-onsemi 0:098463de4c5d 56 mbed_enter_sleep(&sleep_obj);
group-onsemi 0:098463de4c5d 57 mbed_exit_sleep(&sleep_obj);
group-onsemi 0:098463de4c5d 58 }
group-onsemi 0:098463de4c5d 59
group-onsemi 0:098463de4c5d 60
group-onsemi 0:098463de4c5d 61 void mbed_enter_sleep(struct sleep_s *obj)
group-onsemi 0:098463de4c5d 62 {
group-onsemi 0:098463de4c5d 63 // Check if serial allows entering power-down mode
group-onsemi 0:098463de4c5d 64 if (obj->powerdown) {
group-onsemi 0:098463de4c5d 65 obj->powerdown = serial_allow_powerdown();
group-onsemi 0:098463de4c5d 66 }
group-onsemi 0:098463de4c5d 67 // Check if spi allows entering power-down mode
group-onsemi 0:098463de4c5d 68 if (obj->powerdown) {
group-onsemi 0:098463de4c5d 69 obj->powerdown = spi_allow_powerdown();
group-onsemi 0:098463de4c5d 70 }
group-onsemi 0:098463de4c5d 71 // Check if i2c allows entering power-down mode
group-onsemi 0:098463de4c5d 72 if (obj->powerdown) {
group-onsemi 0:098463de4c5d 73 obj->powerdown = i2c_allow_powerdown();
group-onsemi 0:098463de4c5d 74 }
group-onsemi 0:098463de4c5d 75 // Check if pwmout allows entering power-down mode
group-onsemi 0:098463de4c5d 76 if (obj->powerdown) {
group-onsemi 0:098463de4c5d 77 obj->powerdown = pwmout_allow_powerdown();
group-onsemi 0:098463de4c5d 78 }
group-onsemi 0:098463de4c5d 79 // TODO: Check if other peripherals allow entering power-down mode
group-onsemi 0:098463de4c5d 80
group-onsemi 0:098463de4c5d 81 obj->start_us = lp_ticker_read();
group-onsemi 0:098463de4c5d 82 // Let us_ticker prepare for power-down or reject it.
group-onsemi 0:098463de4c5d 83 us_ticker_prepare_sleep(obj);
group-onsemi 0:098463de4c5d 84
group-onsemi 0:098463de4c5d 85 // NOTE(STALE): To pass mbed-drivers test, timer requires to be fine-grained, so its implementation needs HIRC rather than LIRC/LXT as its clock source.
group-onsemi 0:098463de4c5d 86 // But as CLK_PowerDown()/CLK_Idle() is called, HIRC will be disabled and timer cannot keep counting and alarm. To overcome the dilemma,
group-onsemi 0:098463de4c5d 87 // just make CPU halt and compromise power saving.
group-onsemi 0:098463de4c5d 88 // NOTE: As CLK_PowerDown()/CLK_Idle() is called, HIRC/HXT will be disabled in normal mode, but not in ICE mode. This may cause confusion in development.
group-onsemi 0:098463de4c5d 89
group-onsemi 0:098463de4c5d 90 if (obj->powerdown) { // Power-down mode (HIRC/HXT disabled, LIRC/LXT enabled)
group-onsemi 0:098463de4c5d 91 SYS_UnlockReg();
group-onsemi 0:098463de4c5d 92 CLK_PowerDown();
group-onsemi 0:098463de4c5d 93 SYS_LockReg();
group-onsemi 0:098463de4c5d 94 }
group-onsemi 0:098463de4c5d 95 else { // CPU halt mode (HIRC/HXT enabled, LIRC/LXT enabled)
group-onsemi 0:098463de4c5d 96 SYS_UnlockReg();
group-onsemi 0:098463de4c5d 97 CLK_Idle();
group-onsemi 0:098463de4c5d 98 SYS_LockReg();
group-onsemi 0:098463de4c5d 99 }
group-onsemi 0:098463de4c5d 100 __NOP();
group-onsemi 0:098463de4c5d 101 __NOP();
group-onsemi 0:098463de4c5d 102 __NOP();
group-onsemi 0:098463de4c5d 103 __NOP();
group-onsemi 0:098463de4c5d 104
group-onsemi 0:098463de4c5d 105 obj->end_us = lp_ticker_read();
group-onsemi 0:098463de4c5d 106 obj->period_us = (obj->end_us > obj->start_us) ? (obj->end_us - obj->start_us) : (uint32_t) ((uint64_t) obj->end_us + 0xFFFFFFFFu - obj->start_us);
group-onsemi 0:098463de4c5d 107 // Let us_ticker recover from power-down.
group-onsemi 0:098463de4c5d 108 us_ticker_wakeup_from_sleep(obj);
group-onsemi 0:098463de4c5d 109 }
group-onsemi 0:098463de4c5d 110
group-onsemi 0:098463de4c5d 111 void mbed_exit_sleep(struct sleep_s *obj)
group-onsemi 0:098463de4c5d 112 {
group-onsemi 0:098463de4c5d 113 // TODO: TO BE CONTINUED
group-onsemi 0:098463de4c5d 114
group-onsemi 0:098463de4c5d 115 (void)obj;
group-onsemi 0:098463de4c5d 116 }
group-onsemi 0:098463de4c5d 117
group-onsemi 0:098463de4c5d 118 #endif