Maxim Ibragimov / mbed-dev

mbed library sources. Supersedes mbed-src. Fixed broken STM32F1xx RTC on rtc_api.c

Dependents:   Nucleo_F103RB_RTC_battery_bkup_pwr_off_okay

Fork of mbed-dev by mbed official

targets/TARGET_NXP/TARGET_LPC15XX/rtc_api.c@177:619788de047e, 2017-11-07 (annotated)

Committer:
maxxir
Date:
Tue Nov 07 16:46:29 2017 +0000
Revision:
177:619788de047e
Parent:
149:156823d33999 
To fix broken RTC on Nucleo_F103RB / STM32F103 BluePill etc..;  Used direct RTC register manipulation for STM32F1xx;  rtc_read() && rtc_write()  (native rtc_init() - works good);  also added stub for non-working on STM32F1xx rtc_read_subseconds().

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #if DEVICE_RTC
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 void rtc_init(void)
<> 144:ef7eb2e8f9f7 21 {
<> 144:ef7eb2e8f9f7 22 // Enables clock for RTC
<> 144:ef7eb2e8f9f7 23 LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 23);
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 // Software reset
<> 144:ef7eb2e8f9f7 26 LPC_RTC->CTRL |= 1;
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 LPC_RTC->COUNT = 0;
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 // Enabled RTC
<> 144:ef7eb2e8f9f7 31 LPC_RTC->CTRL |= (1 << 7);
<> 144:ef7eb2e8f9f7 32 // clear reset
<> 144:ef7eb2e8f9f7 33 LPC_RTC->CTRL &= ~1;
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 void rtc_free(void)
<> 144:ef7eb2e8f9f7 37 {
<> 144:ef7eb2e8f9f7 38 LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 23);
<> 144:ef7eb2e8f9f7 39 LPC_RTC->CTRL &= ~(1 << 7);
<> 144:ef7eb2e8f9f7 40 }
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 int rtc_isenabled(void)
<> 144:ef7eb2e8f9f7 43 {
<> 144:ef7eb2e8f9f7 44 return (((LPC_RTC->CTRL) & 0x80) != 0);
<> 144:ef7eb2e8f9f7 45 }
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 time_t rtc_read(void)
<> 144:ef7eb2e8f9f7 48 {
<> 144:ef7eb2e8f9f7 49 return (time_t)LPC_RTC->COUNT;
<> 144:ef7eb2e8f9f7 50 }
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 void rtc_write(time_t t)
<> 144:ef7eb2e8f9f7 53 {
<> 144:ef7eb2e8f9f7 54 // Disabled RTC
<> 144:ef7eb2e8f9f7 55 LPC_RTC->CTRL &= ~(1 << 7);
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 // Set count
<> 144:ef7eb2e8f9f7 58 LPC_RTC->COUNT = t;
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 //Enabled RTC
<> 144:ef7eb2e8f9f7 61 LPC_RTC->CTRL |= (1 << 7);
<> 144:ef7eb2e8f9f7 62 }
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 #endif