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Merge pull request #2759 from svastm/lp_timer_f0 

STM32F0 - Add low power timer
pull/2808/head
Sam Grove 2016-09-24 16:41:37 -05:00 committed by GitHub
parent 3c6776f9bf 369ecf2b26
commit a765afddf0
5 changed files with 120 additions and 159 deletions
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2
hal/targets.json
View File

@ -615,7 +615,7 @@
"inherits": ["Target"],
"progen": {"target": "nucleo-f030r8"},
"detect_code": ["0725"],
"device_has": ["ANALOGIN", "I2C", "I2CSLAVE", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
"device_has": ["ANALOGIN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
"default_lib": "small",
"release_versions": ["2"]
},

49
hal/targets/hal/TARGET_STM/TARGET_STM32F0/lp_ticker.c
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@ -37,9 +37,9 @@
#include "rtc_api_hal.h"
static uint8_t lp_ticker_inited = 0;
static uint8_t lp_ticker_reconf_presc = 0;
void lp_ticker_init() {
void lp_ticker_init(void)
{
if (lp_ticker_inited) return;
lp_ticker_inited = 1;
@ -47,48 +47,37 @@ void lp_ticker_init() {
rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
}
uint32_t lp_ticker_read() {
uint32_t sub_secs, milis;
uint32_t lp_ticker_read(void)
{
uint32_t usecs;
time_t time;
lp_ticker_init();
do {
time = rtc_read();
sub_secs = rtc_read_subseconds();
milis = 1000 - (sub_secs * 1000 / rtc_ticker_get_synch_presc());
usecs = rtc_read_subseconds();
} while (time != rtc_read());
return (time * 1000000) + (milis * 1000);
return (time * 1000000) + usecs;
}
void lp_ticker_set_interrupt(timestamp_t timestamp) {
uint32_t sub_secs, delta, milis;
time_t secs;
struct tm *timeinfo;
void lp_ticker_set_interrupt(timestamp_t timestamp)
{
uint32_t delta;
// Reconfigure RTC prescalers whenever the timestamp is below 30ms
if (!lp_ticker_reconf_presc && timestamp < 30000) {
rtc_reconfigure_prescalers();
lp_ticker_reconf_presc = 1;
delta = timestamp - lp_ticker_read();
rtc_set_wake_up_timer(delta);
}
milis = (timestamp % 1000000) / 1000;
secs = rtc_read();
delta = ((timestamp / 1000000) - secs);
secs += delta;
sub_secs = (rtc_ticker_get_synch_presc() * (1000 - milis)) / 1000;
timeinfo = localtime(&secs);
rtc_set_alarm(timeinfo, sub_secs);
void lp_ticker_disable_interrupt(void)
{
rtc_deactivate_wake_up_timer();
}
void lp_ticker_disable_interrupt() {
lp_ticker_reconf_presc = 0;
rtc_ticker_disable_irq();
}
void lp_ticker_clear_interrupt(void)
{
void lp_ticker_clear_interrupt() {
}
#endif

170
hal/targets/hal/TARGET_STM/TARGET_STM32F0/rtc_api.c
View File

@ -1,6 +1,6 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* Copyright (c) 2016, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -29,8 +29,6 @@
*/
#include "rtc_api.h"
#include "rtc_api_hal.h"
#include "stm32f0xx.h"
#include "stm32f0xx_hal_rtc_ex.h"
#if DEVICE_RTC
@ -42,60 +40,27 @@ static int rtc_inited = 0;
static RTC_HandleTypeDef RtcHandle;
#if DEVICE_RTC_LSI
#define RTC_CLOCK LSI_VALUE
#else
#define RTC_CLOCK LSE_VALUE
#endif
#if DEVICE_LOWPOWERTIMER
static uint32_t m_synch_prediv = RTC_SYNCH_PREDIV;
static uint32_t m_asynch_prediv = RTC_ASYNCH_PREDIV;
static void (*irq_handler)(void);
static void rtc_configure_time_and_date()
{
RTC_TimeTypeDef mTime;
RTC_DateTypeDef mDate;
mDate.WeekDay = 1;
mDate.Month = 1;
mDate.Date = 1;
mDate.Year = 2;
if (HAL_RTC_SetDate(&RtcHandle, &mDate, RTC_FORMAT_BIN) != HAL_OK) {
error("Date set failed\n");
}
mTime.Hours = 0;
mTime.Minutes = 0;
mTime.Seconds = 0;
mTime.TimeFormat = RTC_HOURFORMAT_24;
mTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mTime.StoreOperation = RTC_STOREOPERATION_RESET;
if (HAL_RTC_SetTime(&RtcHandle, &mTime, RTC_FORMAT_BIN) != HAL_OK) {
error("Time set failed\n");
}
}
void RTC_IRQHandler()
{
HAL_RTC_AlarmIRQHandler(&RtcHandle);
}
void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
{
if (irq_handler)
{
// Fire the user callback
irq_handler();
}
}
void rtc_set_irq_handler(uint32_t handler)
{
irq_handler = (void (*)(void)) handler;
}
#define RTC_ASYNCH_PREDIV ((RTC_CLOCK - 1) / 0x8000)
#define RTC_SYNCH_PREDIV (RTC_CLOCK / (RTC_ASYNCH_PREDIV + 1) - 1)
#else
#define RTC_ASYNCH_PREDIV (0x007F)
#define RTC_SYNCH_PREDIV (RTC_CLOCK / (RTC_ASYNCH_PREDIV + 1) - 1)
#endif
#if DEVICE_LOWPOWERTIMER
static void (*irq_handler)(void);
static void RTC_IRQHandler(void);
#endif
void rtc_init(void) {
RCC_OscInitTypeDef RCC_OscInitStruct;
uint32_t rtc_freq = 0;
#if DEVICE_RTC_LSI
if (rtc_inited) return;
@ -113,7 +78,6 @@ void rtc_init(void) {
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { // Check if LSE has started correctly
// Connect LSE to RTC
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
rtc_freq = LSE_VALUE;
} else {
error("Cannot initialize RTC with LSE\n");
}
@ -128,32 +92,24 @@ void rtc_init(void) {
__HAL_RCC_BACKUPRESET_FORCE();
__HAL_RCC_BACKUPRESET_RELEASE();
// Enable LSI clock
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
error("Cannot initialize RTC with LSI\n");
}
// Connect LSI to RTC
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
// This value is LSI typical value. To be measured precisely using a timer input capture for example.
rtc_freq = LSI_VALUE;
// Enable LSI clock
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
error("Cannot initialize RTC with LSI\n");
}
// Connect LSI to RTC
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
#endif
// Enable RTC
__HAL_RCC_RTC_ENABLE();
RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
#if !DEVICE_LOWPOWERTIMER
RtcHandle.Init.AsynchPrediv = 127;
RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
#else
RtcHandle.Init.AsynchPrediv = m_asynch_prediv;
RtcHandle.Init.SynchPrediv = m_synch_prediv;
#endif
RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
@ -163,9 +119,17 @@ void rtc_init(void) {
}
#if DEVICE_LOWPOWERTIMER
rtc_configure_time_and_date();
NVIC_SetVector(RTC_IRQn, (uint32_t)&RTC_IRQHandler);
HAL_NVIC_EnableIRQ(RTC_IRQn);
#if DEVICE_RTC_LSI
rtc_write(0);
#else
if (!rtc_isenabled()) {
rtc_write(0);
}
#endif
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_DisableIRQ(RTC_IRQn);
NVIC_SetVector(RTC_IRQn, (uint32_t)RTC_IRQHandler);
NVIC_EnableIRQ(RTC_IRQn);
#endif
}
@ -203,9 +167,9 @@ int rtc_isenabled(void) {
return rtc_inited;
#else
if ((RTC->ISR & RTC_ISR_INITS) == RTC_ISR_INITS) {
return 1;
return 1;
} else {
return 0;
return 0;
}
#endif
}
@ -282,46 +246,48 @@ void rtc_write(time_t t) {
}
#if DEVICE_LOWPOWERTIMER
void rtc_set_alarm(struct tm *ti, uint32_t subsecs)
static void RTC_IRQHandler(void)
{
RTC_AlarmTypeDef mAlarm;
HAL_RTCEx_WakeUpTimerIRQHandler(&RtcHandle);
}
mAlarm.AlarmTime.Hours = ti->tm_hour;
mAlarm.AlarmTime.Minutes = ti->tm_min;
mAlarm.AlarmTime.Seconds = ti->tm_sec;
mAlarm.AlarmTime.SubSeconds = subsecs;
mAlarm.AlarmTime.TimeFormat = RTC_HOURFORMAT_24;
mAlarm.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY;
mAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_NONE;
mAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;
mAlarm.AlarmDateWeekDay = 1;
mAlarm.Alarm = RTC_ALARM_A;
if (HAL_RTC_SetAlarm_IT(&RtcHandle, &mAlarm, RTC_FORMAT_BIN) != HAL_OK) {
error("Set Alarm failed\n");
void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc)
{
if (irq_handler) {
// Fire the user callback
irq_handler();
}
}
void rtc_reconfigure_prescalers()
void rtc_set_irq_handler(uint32_t handler)
{
m_synch_prediv = 0x3FF;
m_asynch_prediv = 0x1F;
rtc_init();
irq_handler = (void (*)(void))handler;
}
uint32_t rtc_ticker_get_synch_presc()
uint32_t rtc_read_subseconds(void)
{
return m_synch_prediv;
return 1000000.f * ((double)(RTC_SYNCH_PREDIV - RTC->SSR) / (RTC_SYNCH_PREDIV + 1));
}
uint32_t rtc_read_subseconds()
void rtc_set_wake_up_timer(uint32_t delta)
{
return RTC->SSR;
uint32_t wake_up_counter = delta / (2000000 / RTC_CLOCK);
if (HAL_RTCEx_SetWakeUpTimer_IT(&RtcHandle, wake_up_counter,
RTC_WAKEUPCLOCK_RTCCLK_DIV2) != HAL_OK) {
error("Set wake up timer failed\n");
}
}
void rtc_ticker_disable_irq()
void rtc_deactivate_wake_up_timer(void)
{
HAL_RTC_DeactivateAlarm(&RtcHandle, RTC_ALARM_A);
HAL_RTCEx_DeactivateWakeUpTimer(&RtcHandle);
}
void rtc_synchronize(void)
{
HAL_RTC_WaitForSynchro(&RtcHandle);
}
#endif // DEVICE_LOWPOWERTIMER

36
hal/targets/hal/TARGET_STM/TARGET_STM32F0/rtc_api_hal.h
View File

@ -41,18 +41,36 @@ extern "C" {
* Extend rtc_api.h
*/
// Prescaler values for LSE clock
#define RTC_ASYNCH_PREDIV 0x7F
#define RTC_SYNCH_PREDIV 0x00FF
/** Set the given function as handler of wakeup timer event.
*
* @param handler The function to set as handler
*/
void rtc_set_irq_handler(uint32_t handler);
void rtc_ticker_disable_irq();
uint32_t rtc_ticker_get_synch_presc();
/** Read the subsecond register.
*
* @return The remaining time as microseconds (0-999999)
*/
uint32_t rtc_read_subseconds(void);
/** Program a wake up timer event in delta microseconds.
*
* @param delta The time to wait
*/
void rtc_set_wake_up_timer(uint32_t delta);
/** Disable the wake up timer event.
*
* The wake up timer use auto reload, you have to deactivate it manually.
*/
void rtc_deactivate_wake_up_timer(void);
/** Synchronise the RTC shadow registers.
*
* Must be called after a deepsleep.
*/
void rtc_synchronize(void);
void rtc_set_alarm(struct tm *ti, uint32_t subsecs);
uint32_t rtc_read_subseconds();
void rtc_reconfigure_prescalers();
#ifdef __cplusplus
}

22
hal/targets/hal/TARGET_STM/TARGET_STM32F0/sleep.c
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@ -28,7 +28,7 @@
*******************************************************************************
*/
#include "sleep_api.h"
#include "rtc_api_hal.h"
#if DEVICE_SLEEP
@ -44,28 +44,16 @@ void sleep(void) {
HAL_ResumeTick();
}
#if defined(TARGET_STM32F030R8) || defined (TARGET_STM32F051R8)
void deepsleep(void) {
// Request to enter STOP mode with regulator in low power mode
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
HAL_InitTick(TICK_INT_PRIORITY);
// After wake-up from STOP reconfigure the PLL
SetSysClock();
HAL_InitTick(TICK_INT_PRIORITY);
}
#else
void deepsleep(void) {
// Request to enter STOP mode with regulator in low power mode
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
// After wake-up from STOP reconfigure the PLL
SetSysClock();
}
#if DEVICE_LOWPOWERTIMER
rtc_synchronize();
#endif
}
#endif