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/*
ChibiOS - Copyright (C) 2016 Andrew Wygle aka awygle
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 MSP430X/hal_lld.c
* @brief MSP430X HAL subsystem low level driver source.
*
* @addtogroup HAL
* @{
*/
#include "hal.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level HAL driver initialization.
*
* @notapi
*/
void hal_lld_init(void) {
/* Disable watchdog */
/* TODO Real watchdog support */
WDTCTL = WDTPW | WDTHOLD;
/* Init clock system */
CSCTL0 = CSKEY; /* unlock clock system */
CSCTL1 = MSP430X_DCOSEL;
CSCTL2 = (MSP430X_ACLK_SRC << 8) | (MSP430X_SMCLK_SRC << 4) | (MSP430X_MCLK_SRC);
CSCTL3 = (DIVIDER(MSP430X_ACLK_DIV) << 8) | (DIVIDER(MSP430X_SMCLK_DIV) << 4) | (DIVIDER(MSP430X_MCLK_DIV));
CSCTL4 = (MSP430X_HFXTCLK_DRIVE << 14) | (MSP430X_HFXTCLK_BYPASS << 12) | (MSP430X_HFFREQ << 10) | HFXTOFF | \
(MSP430X_LFXTCLK_DRIVE << 6) | (MSP430X_LFXTCLK_BYPASS << 4) | VLOOFF | LFXTOFF;
CSCTL6 = (MODCLKREQEN) | (SMCLKREQEN) | (MCLKREQEN) | (ACLKREQEN);
#if defined(MSP430X_USE_HFXT) && defined(MSP430X_USE_LFXT)
do {
CSCTL5 &= ~(HFXTOFFG | LFXTOFFG);
SFRIFG1 &= ~OFIFG;
} while (SFRIFG1 & OFIFG);
#elif defined(MSP430X_USE_HFXT)
do {
CSCTL5 &= ~(HFXTOFFG);
SFRIFG1 &= ~OFIFG;
} while (SFRIFG1 & OFIFG);
#elif defined(MSP430X_USE_LFXT)
do {
CSCTL5 &= ~(LFXTOFFG);
SFRIFG1 &= ~OFIFG;
} while (SFRIFG1 & OFIFG);
#endif
CSCTL0_H = 0xFF; /* Lock clock system */
#if (HAL_USE_DMA == TRUE)
dmaInit();
#endif
}
/** @} */
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