diff options
Diffstat (limited to 'os/hal/platforms/LPC122x/hal_lld.h')
| -rw-r--r-- | os/hal/platforms/LPC122x/hal_lld.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/os/hal/platforms/LPC122x/hal_lld.h b/os/hal/platforms/LPC122x/hal_lld.h new file mode 100644 index 000000000..35624962a --- /dev/null +++ b/os/hal/platforms/LPC122x/hal_lld.h @@ -0,0 +1,217 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 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 LPC122x/hal_lld.h
+ * @brief HAL subsystem low level driver header template.
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#ifndef _HAL_LLD_H_
+#define _HAL_LLD_H_
+
+#include "LPC122x.h"
+#include "nvic.h"
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/**
+ * @brief Defines the support for realtime counters in the HAL.
+ */
+#define HAL_IMPLEMENTS_COUNTERS FALSE
+
+/**
+ * @brief Platform name.
+ */
+#define PLATFORM_NAME "LPC122x"
+
+#define IRCOSCCLK 12000000 /**< High speed internal clock. */
+#define WDGOSCCLK 1600000 /**< Watchdog internal clock. */
+
+#define SYSPLLCLKSEL_IRCOSC 0 /**< Internal RC oscillator
+ clock source. */
+#define SYSPLLCLKSEL_SYSOSC 1 /**< System oscillator clock
+ source. */
+
+#define SYSMAINCLKSEL_IRCOSC 0 /**< Clock source is IRC. */
+#define SYSMAINCLKSEL_PLLIN 1 /**< Clock source is PLLIN. */
+#define SYSMAINCLKSEL_WDGOSC 2 /**< Clock source is WDGOSC. */
+#define SYSMAINCLKSEL_PLLOUT 3 /**< Clock source is PLLOUT. */
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief System PLL clock source.
+ */
+#if !defined(LPC122x_PLLCLK_SOURCE) || defined(__DOXYGEN__)
+#define LPC122x_PLLCLK_SOURCE SYSPLLCLKSEL_SYSOSC
+#endif
+
+/**
+ * @brief System PLL multiplier.
+ * @note The value must be in the 1..32 range and the final frequency
+ * must not exceed the CCO ratings.
+ */
+#if !defined(LPC122x_SYSPLL_MUL) || defined(__DOXYGEN__)
+#define LPC122x_SYSPLL_MUL 2
+#endif
+
+/**
+ * @brief System PLL divider.
+ * @note The value must be chosen between (2, 4, 8, 16).
+ */
+#if !defined(LPC122x_SYSPLL_DIV) || defined(__DOXYGEN__)
+#define LPC122x_SYSPLL_DIV 8
+#endif
+
+/**
+ * @brief System main clock source.
+ */
+#if !defined(LPC122x_MAINCLK_SOURCE) || defined(__DOXYGEN__)
+#define LPC122x_MAINCLK_SOURCE SYSMAINCLKSEL_PLLOUT
+#endif
+
+/**
+ * @brief AHB clock divider.
+ * @note The value must be chosen between (1...255).
+ */
+#if !defined(LPC122x_SYSCLK_DIV) || defined(__DOXYGEN__)
+#define LPC122x_SYSABHCLK_DIV 1
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/**
+ * @brief Calculated SYSOSCCTRL setting.
+ */
+#if (SYSOSCCLK < 18000000) || defined(__DOXYGEN__)
+#define LPC122x_SYSOSCCTRL 0
+#else
+#define LPC122x_SYSOSCCTRL 1
+#endif
+
+/**
+ * @brief PLL input clock frequency.
+ */
+#if (LPC122x_PLLCLK_SOURCE == SYSPLLCLKSEL_SYSOSC) || defined(__DOXYGEN__)
+#define LPC122x_SYSPLLCLKIN SYSOSCCLK
+#elif LPC122x_PLLCLK_SOURCE == SYSPLLCLKSEL_IRCOSC
+#define LPC122x_SYSPLLCLKIN IRCOSCCLK
+#else
+#error "invalid LPC122x_PLLCLK_SOURCE clock source specified"
+#endif
+
+/**
+ * @brief MSEL mask in SYSPLLCTRL register.
+ */
+#if (LPC122x_SYSPLL_MUL >= 1) && (LPC122x_SYSPLL_MUL <= 32) || \
+ defined(__DOXYGEN__)
+#define LPC122x_SYSPLLCTRL_MSEL (LPC122x_SYSPLL_MUL - 1)
+#else
+#error "LPC122x_SYSPLL_MUL out of range (1...32)"
+#endif
+
+/**
+ * @brief PSEL mask in SYSPLLCTRL register.
+ */
+#if (LPC122x_SYSPLL_DIV == 2) || defined(__DOXYGEN__)
+#define LPC122x_SYSPLLCTRL_PSEL (0 << 5)
+#elif LPC122x_SYSPLL_DIV == 4
+#define LPC122x_SYSPLLCTRL_PSEL (1 << 5)
+#elif LPC122x_SYSPLL_DIV == 8
+#define LPC122x_SYSPLLCTRL_PSEL (2 << 5)
+#elif LPC122x_SYSPLL_DIV == 16
+#define LPC122x_SYSPLLCTRL_PSEL (3 << 5)
+#else
+#error "invalid LPC122x_SYSPLL_DIV value (2,4,8,16)"
+#endif
+
+/**
+ * @brief CCP frequency.
+ */
+#define LPC122x_SYSPLLCCO (LPC122x_SYSPLLCLKIN * LPC122x_SYSPLL_MUL * \
+ LPC122x_SYSPLL_DIV)
+
+#if (LPC122x_SYSPLLCCO < 156000000) || (LPC122x_SYSPLLCCO > 320000000)
+#error "CCO frequency out of the acceptable range (156...320)"
+#endif
+
+/**
+ * @brief PLL output clock frequency.
+ */
+#define LPC122x_SYSPLLCLKOUT (LPC122x_SYSPLLCCO / LPC122x_SYSPLL_DIV)
+
+#if (LPC122x_MAINCLK_SOURCE == SYSMAINCLKSEL_IRCOSC) || defined(__DOXYGEN__)
+#define LPC122x_MAINCLK IRCOSCCLK
+#elif LPC122x_MAINCLK_SOURCE == SYSMAINCLKSEL_PLLIN
+#define LPC122x_MAINCLK LPC122x_SYSPLLCLKIN
+#elif LPC122x_MAINCLK_SOURCE == SYSMAINCLKSEL_WDGOSC
+#define LPC122x_MAINCLK WDGOSCCLK
+#elif LPC122x_MAINCLK_SOURCE == SYSMAINCLKSEL_PLLOUT
+#define LPC122x_MAINCLK LPC122x_SYSPLLCLKOUT
+#else
+#error "invalid LPC122x_MAINCLK_SOURCE clock source specified"
+#endif
+
+/**
+ * @brief AHB clock.
+ */
+#define LPC122x_SYSCLK (LPC122x_MAINCLK / LPC122x_SYSABHCLK_DIV)
+#if LPC122x_SYSCLK > 45000000
+#error "AHB clock frequency out of the acceptable range (45MHz max)"
+#endif
+
+/**
+ * @brief Flash wait states.
+ */
+#if (LPC122x_SYSCLK <= 30000000) || defined(__DOXYGEN__)
+#define LPC122x_FLASHCFG_FLASHTIM 0
+#else
+#define LPC122x_FLASHCFG_FLASHTIM 1
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void hal_lld_init(void);
+ void lpc122x_clock_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_LLD_H_ */
+
+/** @} */
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