A board support package for the LPC4088 Display Module.
Dependencies: DM_HttpServer DM_USBHost
Dependents: lpc4088_displaymodule_emwin lpc4088_displaymodule_demo_sphere sampleGUI sampleEmptyGUI ... more
Fork of DMSupport by
Diff: dm_rtc.cpp
- Revision:
- 42:bbfe299d4a0c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dm_rtc.cpp Mon Nov 04 14:32:50 2019 +0000 @@ -0,0 +1,103 @@ +/* + * Copyright 2019 Embedded Artists AB + * + * 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. + */ + + +/****************************************************************************** + * Includes + *****************************************************************************/ + +#include "mbed.h" +#include "dm_rtc.h" +#include "mbed_mktime.h" + +/****************************************************************************** + * Defines and typedefs + *****************************************************************************/ + +/****************************************************************************** + * External global variables + *****************************************************************************/ + +/****************************************************************************** + * Local variables + *****************************************************************************/ + +/****************************************************************************** + * Local Functions + *****************************************************************************/ + + +/****************************************************************************** + * Public Functions + *****************************************************************************/ + +void dm_init_rtc(void) +{ + LPC_SC->PCONP |= 0x200; // Ensure power is on + LPC_RTC->CCR = 0x00; + + LPC_RTC->CCR |= 1 << 0; // Ensure the RTC is enabled +} + +time_t dm_read_rtc(void) +{ + // Setup a tm structure based on the RTC + struct tm timeinfo; + timeinfo.tm_sec = LPC_RTC->SEC; + timeinfo.tm_min = LPC_RTC->MIN; + timeinfo.tm_hour = LPC_RTC->HOUR; + timeinfo.tm_mday = LPC_RTC->DOM; + timeinfo.tm_mon = LPC_RTC->MONTH - 1; + timeinfo.tm_year = LPC_RTC->YEAR - 1900; + + // Convert to timestamp + time_t t; + if (_rtc_maketime(&timeinfo, &t, RTC_4_YEAR_LEAP_YEAR_SUPPORT) == false) { + return 0; + } + + return t; +} + +void dm_write_rtc(time_t t) +{ + // Convert the time in to a tm + struct tm timeinfo; + if (_rtc_localtime(t, &timeinfo, RTC_4_YEAR_LEAP_YEAR_SUPPORT) == false) { + return; + } + + // Pause clock, and clear counter register (clears us count) + LPC_RTC->CCR |= 2; + + // Set the RTC + LPC_RTC->SEC = timeinfo.tm_sec; + LPC_RTC->MIN = timeinfo.tm_min; + LPC_RTC->HOUR = timeinfo.tm_hour; + LPC_RTC->DOM = timeinfo.tm_mday; + LPC_RTC->MONTH = timeinfo.tm_mon + 1; + LPC_RTC->YEAR = timeinfo.tm_year + 1900; + + // Restart clock + LPC_RTC->CCR &= ~((uint32_t)2); +} + +int dm_isenabled_rtc(void) +{ + return(((LPC_RTC->CCR) & 0x01) != 0); +} + + \ No newline at end of file