osd-contiki/cpu/stm32w108/hal/micro/cortexm3/micro.c
2010-10-25 09:03:38 +00:00

109 lines
2.4 KiB
C

/** @file micro.c
* @brief STM32W108 micro specific minimal HAL functions
*
*
* <!--(C) COPYRIGHT 2010 STMicroelectronics. All rights reserved. -->
*/
#include PLATFORM_HEADER
#include "error.h"
#include "hal/micro/micro-common.h"
#include "hal/micro/cortexm3/micro-common.h"
#include "micro/system-timer.h"
#include "micro/adc.h"
#include <stdlib.h>
#include <string.h>
void halInit(void)
{
//Disable the REG_EN external regulator enable signal. Out of reset this
//signal overrides PA7. By disabling it early, PA7 is reclaimed as a GPIO.
//If an external regulator is required, the following line of code should
//be deleted.
GPIO_DBGCFG &= ~GPIO_EXTREGEN;
halInternalSetRegTrim(FALSE);
halPowerUp();
halInternalCalibrateFastRc();
#ifndef DISABLE_WATCHDOG
halInternalEnableWatchDog();
#endif
halInternalStartSystemTimer();
}
void halReboot(void)
{
INTERRUPTS_OFF();
//FCLK must be 6MHz to allow the SYSRESETREQ signal to cleanly
//propagate and reset the chip. Switch SYSCLK first since we need
//the cycles used by switching FCLK to guarantee the SYSCLK is
//stable and ready for SYSRESETREQ.
OSC24M_CTRL = OSC24M_CTRL_RESET; //Guarantee SYSCLK is sourced from OSCHF
CPU_CLKSEL = CPU_CLKSEL_RESET; //Guarantee FCLK is sourced from PCLK
SCS_AIRCR = (0x05FA0000 | SCS_AIRCR_SYSRESETREQ); // trigger the reset
//NOTE: SYSRESETREQ is not the same as nRESET. It will not do the debug
//pieces: DWT, ITM, FPB, vector catch, etc
}
void halPowerDown(void)
{
}
void halPowerUp(void)
{
halInternalInitAdc();
halCommonCalibratePads();
halInternalSwitchToXtal();
}
static int16u seed0 = 0xbeef;
static int16u seed1 = 0xface;
void halCommonSeedRandom(int32u seed)
{
seed0 = (int16u) seed;
if (seed0 == 0)
seed0 = 0xbeef;
seed1 = (int16u) (seed >> 16);
if (seed1 == 0)
seed1 = 0xface;
}
static int16u shift(int16u *val, int16u taps)
{
int16u newVal = *val;
if (newVal & 0x8000)
newVal ^= taps;
*val = newVal << 1;
return newVal;
}
int16u halCommonGetRandom(void)
{
return (shift(&seed0, 0x0062)
^ shift(&seed1, 0x100B));
}
void halCommonMemCopy(void *dest, const void *source, int8u bytes)
{
memcpy(dest, source, bytes);
}
int8s halCommonMemCompare(const void *source0, const void *source1, int8u bytes)
{
return memcmp(source0, source1, bytes);
}
void halCommonMemSet(void *dest, int8u val, int16u bytes)
{
memset(dest, val, bytes);
}