contiki/cpu/stm32w108/hal/micro/cortexm3/micro.c
Adam Dunkels a5046e83c7 Cleanup and refactoring of the STM32w port
This is a general cleanup of things like code style issues and code structure of the STM32w port to make it more like the rest of Contiki is structured.
2013-03-18 13:31:26 +01:00

156 lines
4.0 KiB
C

/** @file micro.c
* @brief STM32W108 micro specific minimal HAL functions
*
*
* <!--(C) COPYRIGHT 2010 STMicroelectronics. All rights reserved. -->
*/
#include PLATFORM_HEADER
#include BOARD_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 "micro/cortexm3/memmap.h"
#include "micro/cortexm3/iap_bootloader.h"
#include <stdlib.h>
#include <string.h>
extern void halBoardInit(void);
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);
halBoardInit();
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)
{
halBoardPowerDown();
}
void halPowerUp(void)
{
halInternalInitAdc();
halCommonCalibratePads();
halInternalSwitchToXtal();
halBoardPowerUp();
}
static uint16_t seed0 = 0xbeef;
static uint16_t seed1 = 0xface;
void halCommonSeedRandom(uint32_t seed)
{
seed0 = (uint16_t) seed;
if (seed0 == 0)
seed0 = 0xbeef;
seed1 = (uint16_t) (seed >> 16);
if (seed1 == 0)
seed1 = 0xface;
}
static uint16_t shift(uint16_t *val, uint16_t taps)
{
uint16_t newVal = *val;
if (newVal & 0x8000)
newVal ^= taps;
*val = newVal << 1;
return newVal;
}
uint16_t halCommonGetRandom(void)
{
return (shift(&seed0, 0x0062)
^ shift(&seed1, 0x100B));
}
void halCommonMemCopy(void *dest, const void *source, uint8_t bytes)
{
memcpy(dest, source, bytes);
}
int8_t halCommonMemCompare(const void *source0, const void *source1, uint8_t bytes)
{
return memcmp(source0, source1, bytes);
}
void halCommonMemSet(void *dest, uint8_t val, uint16_t bytes)
{
memset(dest, val, bytes);
}
#pragma pack(1)
typedef struct appSwitchStruct {
uint32_t signature;
uint8_t mode;
uint8_t channel;
union {
uint16_t panID;
uint16_t offset;
} param;
} appSwitchStructType;
#pragma pack()
static appSwitchStructType *appSwitch = (appSwitchStructType *) RAM_BOTTOM;
StStatus halBootloaderStart(uint8_t mode, uint8_t channel, uint16_t panID)
{
if (mode == IAP_BOOTLOADER_MODE_UART) {
uint8_t cut = *(volatile uint8_t *) 0x08040798;
if (!( (halFixedAddressTable.baseTable.type == FIXED_ADDRESS_TABLE_TYPE) &&
( ( (halFixedAddressTable.baseTable.version & FAT_MAJOR_VERSION_MASK)
== 0x0000 ) &&
(halFixedAddressTable.baseTable.version == 0x0003) //checking presence of valid version
) && (cut >= 2) && (cut <= 3)))
/* Cut not supported */
return ST_ERR_FATAL;
} else {
/* Check that OTA bootloader is at the base of the flash */
if (*((uint32_t *) (MFB_BOTTOM + 28)) == IAP_BOOTLOADER_APP_SWITCH_SIGNATURE) {
appSwitch->channel = ((channel >= 11) && (channel <= 26)) ? channel :IAP_BOOTLOADER_DEFAULT_CHANNEL;
appSwitch->param.panID = panID;
} else {
return ST_ERR_FATAL;
}
}
appSwitch->signature = IAP_BOOTLOADER_APP_SWITCH_SIGNATURE;
appSwitch->mode = mode;
halReboot();
return (mode <= IAP_BOOTLOADER_MODE_OTA) ? ST_ERR_FATAL: ST_BAD_ARGUMENT;
}