Added support for EA LPCXpresso LPC1769 board and LPC17xx drivers for

adc, i2c, serial, spi, rtc, pal, gpt and dma.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@6736 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 290 insertions, 0 deletions

diff --git a/os/hal/platforms/LPC17xx/rtc_lld.c b/os/hal/platforms/LPC17xx/rtc_lld.c
new file mode 100644
index 000000000..62acfffc8
--- /dev/null
+++ b/os/hal/platforms/LPC17xx/rtc_lld.c
@@ -0,0 +1,290 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+    LPC17xx RTC driver - Copyright (C) 2013 Marcin Jokel
+
+    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.
+*/
+/*
+   Concepts and parts of this file have been contributed by Uladzimir Pylinsky
+   aka barthess.
+ */
+
+/**
+ * @file    LPC17xx/rtc_lld.c
+ * @brief   LPC17xx RTC low level driver.
+ *
+ * @addtogroup RTC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_RTC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief RTC driver identifier.
+ */
+RTCDriver RTCD1;
+
+/*===========================================================================*/
+/* Driver local variables and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+/**
+ * @brief   Enable RTC clock.
+ */
+#define _rtc_clk_enable()                                                     \
+  LPC_RTC->CCR |= CCR_CLKEN
+
+/**
+ * @brief   Disable RTC clock.
+ */
+#define _rtc_clk_disable()                                                    \
+    LPC_RTC->CCR &= ~CCR_CLKEN
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   RTC interrupt handler.
+ *
+ * @isr
+ */
+
+#if LPC17xx_RTC_USE_ALARM || defined(__DOXYGEN__)
+CH_IRQ_HANDLER(Vector84) {
+  uint32_t status;
+
+  CH_IRQ_PROLOGUE();
+
+  status = LPC_RTC->ILR;
+  LPC_RTC->ILR = status;    /* Clear interrupt flag */
+
+  if ((status & ILR_RTCALF) && (RTCD1.callback != NULL))
+    RTCD1.callback(&RTCD1, RTC_EVENT_ALARM);
+
+  CH_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   Enable access to registers.
+ *
+ * @api
+ */
+void rtc_lld_init(void) {
+
+  if(LPC_RTC->RTC_AUX & RTC_AUX_RTC_OSCF) {     /* Set after RTC power was first turn. */
+
+    LPC_RTC->CCR = CCR_CCALEN;                  /* Disable calibration and RTC clock. */
+    LPC_RTC->CALIBRATION = 0;
+    LPC_RTC->RTC_AUX = RTC_AUX_RTC_OSCF;        /* Clear RTC Oscillator Fail detect flag. */
+
+    LPC_RTC->CIIR = 0;                          /* Disable Counter Increment Interrupt. */
+    LPC_RTC->AMR = AMR_MASK_ALL;                /* Mask alarm interrupt. */
+    LPC_RTC->ILR = ILR_RTCALF | ILR_RTCCIF;     /* Clear interrupt flags. */
+
+    /* Set date to Saturday 01.01.2000 00:00:00 */
+    LPC_RTC->SEC  = 0;
+    LPC_RTC->MIN  = 0;
+    LPC_RTC->HOUR = 0;
+    LPC_RTC->DOM  = 1;
+    LPC_RTC->MONTH = 1;
+    LPC_RTC->YEAR = 2000;
+    LPC_RTC->DOW = 6;
+    LPC_RTC->DOY = 1;
+
+    _rtc_clk_enable();                          /* Enable RTC clock. */
+  }
+
+#if LPC17xx_RTC_USE_ALARM
+  nvicEnableVector(RTC_IRQn, CORTEX_PRIORITY_MASK(LPC17xx_RTC_IRQ_PRIORITY));
+#endif
+  return;
+}
+
+/**
+ * @brief   Set current time.
+ * @note    Fractional part will be silently ignored. There is no possibility
+ *          to set it on STM32 platform.
+ *
+ * @param[in] rtcp      pointer to RTC driver structure
+ * @param[in] timespec  pointer to a @p RTCTime structure
+ *
+ * @api
+ */
+void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec) {
+  (void)rtcp;
+
+  _rtc_clk_disable();                  /* Disable RTC clock. */
+  LPC_RTC->SEC  = timespec->sec;
+  LPC_RTC->MIN  = timespec->min;
+  LPC_RTC->HOUR = timespec->hour;
+  LPC_RTC->DOM  = timespec->dom;
+  LPC_RTC->MONTH = timespec->month;
+  LPC_RTC->YEAR = timespec->year;
+  LPC_RTC->DOW = timespec->dow;
+  LPC_RTC->DOY = timespec->doy;
+  _rtc_clk_enable();                  /* Enable RTC clock. */
+
+}
+
+/**
+ * @brief   Get current time.
+ *
+ * @param[in] rtcp      pointer to RTC driver structure
+ * @param[out] timespec pointer to a @p RTCTime structure
+ *
+ * @api
+ */
+void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec) {
+  (void)rtcp;
+
+  timespec->sec = LPC_RTC->SEC;
+  timespec->min = LPC_RTC->MIN;
+  timespec->hour = LPC_RTC->HOUR;
+  timespec->dom = LPC_RTC->DOM;
+  timespec->month = LPC_RTC->MONTH;
+  timespec->year = LPC_RTC->YEAR;
+  timespec->dow = LPC_RTC->DOW;
+  timespec->doy = LPC_RTC->DOY;
+}
+
+/**
+ * @brief     Set alarm time.
+ *
+ * @note      Default value after BKP domain reset for both comparators is 0.
+ * @note      Function does not performs any checks of alarm time validity.
+ *
+ * @param[in] rtcp      Pointer to RTC driver structure.
+ * @param[in] alarm     Alarm identifier. Can be 1 or 2.
+ * @param[in] alarmspec Pointer to a @p RTCAlarm structure.
+ *
+ * @api
+ */
+void rtc_lld_set_alarm(RTCDriver *rtcp,
+                       rtcalarm_t alarm,
+                       const RTCAlarm *alarmspec) {
+  (void)rtcp;
+  (void)alarm;
+  LPC_RTC->ALSEC = alarmspec->alsec;
+  LPC_RTC->ALMIN = alarmspec->almin;
+  LPC_RTC->ALHOUR = alarmspec->alhour;
+  LPC_RTC->ALDOM = alarmspec->aldom;
+  LPC_RTC->ALMON = alarmspec->almonth;
+  LPC_RTC->ALYEAR = alarmspec->alyear;
+  LPC_RTC->ALDOW = alarmspec->aldow;
+  LPC_RTC->ALDOY = alarmspec->aldoy;
+
+}
+
+/**
+ * @brief   Get alarm time.
+ *
+ * @param[in] rtcp       pointer to RTC driver structure
+ * @param[in] alarm      alarm identifier
+ * @param[out] alarmspec pointer to a @p RTCAlarm structure
+ *
+ * @api
+ */
+void rtc_lld_get_alarm(RTCDriver *rtcp,
+                       rtcalarm_t alarm,
+                       RTCAlarm *alarmspec) {
+  (void)rtcp;
+  (void)alarm;
+  alarmspec->alsec = LPC_RTC->ALSEC;
+  alarmspec->almin = LPC_RTC->ALMIN;
+  alarmspec->alhour = LPC_RTC->ALHOUR;
+  alarmspec->aldom = LPC_RTC->ALDOM;
+  alarmspec->almonth = LPC_RTC->ALMON;
+  alarmspec->alyear = LPC_RTC->ALYEAR;
+  alarmspec->aldow = LPC_RTC->ALDOW;
+  alarmspec->aldoy = LPC_RTC->ALDOY;
+
+}
+
+/**
+ * @brief   Enables or disables RTC callbacks.
+ * @details This function enables or disables callbacks, use a @p NULL pointer
+ *          in order to disable a callback.
+ *
+ * @param[in] rtcp      pointer to RTC driver structure
+ * @param[in] callback  callback function pointer or @p NULL
+ *
+ * @notapi
+ */
+void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback) {
+
+  LPC_RTC->AMR = AMR_MASK_ALL;                /* Mask alarm interrupt. */
+  LPC_RTC->ILR = ILR_RTCALF;                  /* Clear interrupt flag. */
+
+  if (callback != NULL) {
+
+    /* IRQ sources enabled only after setting up the callback.*/
+    rtcp->callback = callback;
+    LPC_RTC->AMR = 0;           /* Enable alarm interrupt. */
+  }
+  else {
+
+    /* Callback set to NULL only after disabling the IRQ sources.*/
+    rtcp->callback = NULL;
+  }
+}
+
+#include "chrtclib.h"
+
+/**
+ * @brief   Get current time in format suitable for usage in FatFS.
+ *
+ * @param[in] rtcp      pointer to RTC driver structure
+ * @return              FAT time value.
+ *
+ * @api
+ */
+uint32_t rtc_lld_get_time_fat(RTCDriver *rtcp) {
+  uint32_t fattime;
+  struct tm timp;
+
+  rtcGetTimeTm(rtcp, &timp);
+
+  fattime  = (timp.tm_sec)       >> 1;
+  fattime |= (timp.tm_min)       << 5;
+  fattime |= (timp.tm_hour)      << 11;
+  fattime |= (timp.tm_mday)      << 16;
+  fattime |= (timp.tm_mon + 1)   << 21;
+  fattime |= (timp.tm_year - 80) << 25;
+
+  return fattime;
+}
+
+#endif /* HAL_USE_RTC */
+
+/** @} */