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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2014-10-12 09:29:12 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2014-10-12 09:29:12 +0000 |
| commit | 0320aa53143ea1bb908c90c599fa6bdd3fce2c46 (patch) | |
| tree | fb312a61e589d5b70d8f3a6b15d662b97bb0f89a /os/hal/ports/LPC/LPC214x/hal_lld.c | |
| parent | 66ea340bb19d5af9294f0b348ac1c4550117c367 (diff) | |
| download | ChibiOS-0320aa53143ea1bb908c90c599fa6bdd3fce2c46.tar.gz ChibiOS-0320aa53143ea1bb908c90c599fa6bdd3fce2c46.tar.bz2 ChibiOS-0320aa53143ea1bb908c90c599fa6bdd3fce2c46.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7387 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/LPC/LPC214x/hal_lld.c')
| -rw-r--r-- | os/hal/ports/LPC/LPC214x/hal_lld.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/os/hal/ports/LPC/LPC214x/hal_lld.c b/os/hal/ports/LPC/LPC214x/hal_lld.c new file mode 100644 index 000000000..cb1aaf3cf --- /dev/null +++ b/os/hal/ports/LPC/LPC214x/hal_lld.c @@ -0,0 +1,116 @@ +/*
+ ChibiOS - Copyright (C) 2006-2014 Giovanni Di Sirio
+
+ 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.
+*/
+
+/**
+ * @file LPC214x/hal_lld.c
+ * @brief LPC214x HAL subsystem low level driver source.
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#include "hal.h"
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*
+ * Non-vectored IRQs handler, the default action can be overridden by
+ * redefining the @p LPC214x_NON_VECTORED_IRQ_HOOK() hook macro.
+ */
+static CH_IRQ_HANDLER(irq_handler) {
+
+ CH_IRQ_PROLOGUE();
+
+ LPC214x_NON_VECTORED_IRQ_HOOK();
+
+ VICVectAddr = 0;
+ CH_IRQ_EPILOGUE();
+}
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level HAL driver initialization.
+ *
+ * @notapi
+ */
+void hal_lld_init(void) {
+
+ vic_init();
+ VICDefVectAddr = (IOREG32)irq_handler;
+
+}
+
+/**
+ * @brief LPC214x clocks and PLL initialization.
+ * @note All the involved constants come from the file @p board.h.
+ * @note This function must be invoked only after the system reset.
+ *
+ * @special
+ */
+void lpc214x_clock_init(void) {
+
+ /*
+ * All peripherals clock disabled by default in order to save power.
+ */
+ PCONP = PCRTC | PCTIM0;
+
+ /*
+ * MAM setup.
+ */
+ MAMTIM = 0x3; /* 3 cycles for flash accesses. */
+ MAMCR = 0x2; /* MAM fully enabled. */
+
+ /*
+ * PLL setup for Fosc=12MHz and CCLK=48MHz.
+ * P=2 M=3.
+ */
+ PLL *pll = PLL0Base;
+ pll->PLL_CFG = 0x23; /* P and M values. */
+ pll->PLL_CON = 0x1; /* Enables the PLL 0. */
+ pll->PLL_FEED = 0xAA;
+ pll->PLL_FEED = 0x55;
+ while (!(pll->PLL_STAT & 0x400))
+ ; /* Wait for PLL lock. */
+
+ pll->PLL_CON = 0x3; /* Connects the PLL. */
+ pll->PLL_FEED = 0xAA;
+ pll->PLL_FEED = 0x55;
+
+ /*
+ * VPB setup.
+ * PCLK = CCLK / 4.
+ */
+ VPBDIV = VPD_D4;
+}
+
+/** @} */
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