fw_tim.c File Reference

#include "fw_tim.h"
#include "fw_sys.h"
#include "fw_util.h"

Go to the source code of this file.

Functions
int16_t	TIM_Timer0n1_CalculateInitValue (uint16_t frequency, HAL_State_t freq1t, uint16_t limit)
void	TIM_Timer0_Config (HAL_State_t freq1t, TIM_TimerMode_t mode, uint16_t frequency)
void	TIM_Timer1_Config (HAL_State_t freq1t, TIM_TimerMode_t mode, uint16_t frequency)
int16_t	_TIM_Timer234_InitValueCalculate (uint16_t frequency, uint8_t prescaler, HAL_State_t freq1t)
void	TIM_Timer2_Config (HAL_State_t freq1t, uint8_t prescaler, uint16_t frequency)
void	TIM_Timer3_Config (HAL_State_t freq1t, uint8_t prescaler, uint16_t frequency, HAL_State_t intState)
void	TIM_Timer4_Config (HAL_State_t freq1t, uint8_t prescaler, uint16_t frequency, HAL_State_t intState)

Function Documentation

_TIM_Timer234_InitValueCalculate()

int16_t _TIM_Timer234_InitValueCalculate	(	uint16_t	frequency,
		uint8_t	prescaler,
		HAL_State_t	freq1t
	)

Definition at line 72 of file fw_tim.c.

{
    uint32_t value = __SYSCLOCK;
    if (!freq1t)
        value = value / 12;
    value = value / ((prescaler + 1) * frequency);
 
    if (value > 0xFFFF)
        return 0;
    else
        return 0xFFFF - value;
}

TIM_Timer0_Config()

void TIM_Timer0_Config	(	HAL_State_t	freq1t,
		TIM_TimerMode_t	mode,
		uint16_t	frequency
	)

Definition at line 38 of file fw_tim.c.

{
    uint16_t init;
    TIM_Timer0_Set1TMode(freq1t);
    TIM_Timer0_SetMode(mode);
    if (mode == TIM_TimerMode_8BitAuto)
    {
        init = TIM_Timer0n1_CalculateInitValue(frequency, freq1t, 0xFF);
        TIM_Timer0_SetInitValue(init & 0xFF, init & 0xFF);
    }
    else
    {
        init = TIM_Timer0n1_CalculateInitValue(frequency, freq1t, 0xFFFF);
        TIM_Timer0_SetInitValue(init >> 8, init & 0xFF);
    }
}

TIM_Timer0n1_CalculateInitValue()

int16_t TIM_Timer0n1_CalculateInitValue	(	uint16_t	frequency,
		HAL_State_t	freq1t,
		uint16_t	limit
	)

Calculate the initial value of Timer0 & Timer1 counter

• If the frequency is too high, it will return the value of limit, so the timer will run in the highest frequency
• If the frequency is too low, it will return 0, so the timer will run in the lowest possible frequency

Definition at line 26 of file fw_tim.c.

{
    uint32_t value = __SYSCLOCK;
    if (!freq1t)
        value = value / 12;
    value = value / frequency;
    if (value > limit)
        return 0;
    else
        return limit - value;
}

TIM_Timer1_Config()

void TIM_Timer1_Config	(	HAL_State_t	freq1t,
		TIM_TimerMode_t	mode,
		uint16_t	frequency
	)

Definition at line 55 of file fw_tim.c.

{
    uint16_t init;
    TIM_Timer1_Set1TMode(freq1t);
    TIM_Timer1_SetMode(mode);
    if (mode == TIM_TimerMode_8BitAuto)
    {
        init = TIM_Timer0n1_CalculateInitValue(frequency, freq1t, 0xFF);
        TIM_Timer1_SetInitValue(init & 0xFF, init & 0xFF);
    }
    else
    {
        init = TIM_Timer0n1_CalculateInitValue(frequency, freq1t, 0xFF);
        TIM_Timer1_SetInitValue(init >> 8, init & 0xFF);
    }
}

TIM_Timer2_Config()

void TIM_Timer2_Config	(	HAL_State_t	freq1t,
		uint8_t	prescaler,
		uint16_t	frequency
	)

Timer2,3,4 Configuration

1. no interrupt priority
2. frequency = SYSCLK / (TMxPS + 1) / (0xFFFF - TxH,TxL) / (1T? 1 : 12)

Definition at line 93 of file fw_tim.c.

{
    uint16_t init = _TIM_Timer234_InitValueCalculate(frequency, prescaler, freq1t);
    TIM_Timer2_Set1TMode(freq1t);
    TIM_Timer2_SetPreScaler(prescaler);
    TIM_Timer2_SetInitValue(init >> 8, init & 0xFF);
}

TIM_Timer3_Config()

void TIM_Timer3_Config	(	HAL_State_t	freq1t,
		uint8_t	prescaler,
		uint16_t	frequency,
		HAL_State_t	intState
	)

Definition at line 101 of file fw_tim.c.

{
    uint16_t init = _TIM_Timer234_InitValueCalculate(frequency, prescaler, freq1t);
    TIM_Timer3_Set1TMode(freq1t);
    TIM_Timer3_SetPreScaler(prescaler);
    TIM_Timer3_SetInitValue(init >> 8, init & 0xFF);
    EXTI_Timer3_SetIntState(intState);
}

TIM_Timer4_Config()

void TIM_Timer4_Config	(	HAL_State_t	freq1t,
		uint8_t	prescaler,
		uint16_t	frequency,
		HAL_State_t	intState
	)

Definition at line 111 of file fw_tim.c.

{
    uint16_t init = _TIM_Timer234_InitValueCalculate(frequency, prescaler, freq1t);
    TIM_Timer4_Set1TMode(freq1t);
    TIM_Timer4_SetPreScaler(prescaler);
    TIM_Timer4_SetInitValue(init >> 8, init & 0xFF);
    EXTI_Timer4_SetIntState(intState);
}