FwLib_STC8/include/fw_sys.h

// Copyright 2021 IOsetting <iosetting@outlook.com>
//
// 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.

#ifndef ___FW_SYS_H___
#define ___FW_SYS_H___

#include "fw_conf.h"
#include "fw_types.h"

/**
 * STC8H Clock: 
 *  MCKSEL                     ||===> MCLKODIV ==> MCLKO_S => P1.6/P5.4
 *  00 Internal IRC    |       ||
 *  01 External OSC    |==> CLKDIV ==> SYSCLK
 *  10 External 32KHz  |
 *  11 Internal 32KHz  |
*/

#define SYS_SetFOSC(__IRCBAND__, __VRTRIM__, __IRTRIM__, __LIRTRIM__)  do {      \
                                     IRCBAND = ((__IRCBAND__) & 0x03);           \
                                     VRTRIM = (__VRTRIM__);                      \
                                     IRTRIM = (__IRTRIM__);                      \
                                     LIRTRIM = ((__LIRTRIM__) & 0x03);           \
                                 } while(0)

void SYS_SetClock(void);
void SYS_Delay(uint16_t t);
void SYS_DelayUs(uint16_t t);
uint32_t SYS_GetSysClock(void);

#endif