/*******************************************************************************
* Function Name : I2C_FCLKConfig
* Description : Configures frequency bits according to RCLK frequency.
* the selected I2C must be disabled
* Input : I2Cx ( I2C0 or I2C1 )
* Return : None.
*******************************************************************************/
void I2C_FCLKConfig (I2C_TypeDef *I2Cx)
{
u32 FCLK=0;
/* Get the FCLK frequency using the RCCU library */
FCLK = RCCU_FrequencyValue ( RCCU_FCLK );
/* Test the value of the FCLK and affect FR0,FR1&FR2 of the OAR2 register */
if (FCLK > 5000000)
{
if (FCLK <10000000)
I2Cx->OAR2 |= 0x00;
else if (FCLK <16670000)
I2Cx->OAR2 |= 0x20;
else if (FCLK < 26670000)
I2Cx->OAR2 |= 0x40;
else if (FCLK <40000000)
I2Cx->OAR2 |= 0x60;
else if (FCLK < 53330000)
I2Cx->OAR2 |= 0x80;
else if (FCLK < 66000000)
I2Cx->OAR2 |= 0xA0;
else if (FCLK <80000000)
I2Cx->OAR2 |= 0xC0;
else if (FCLK <100000000)
I2Cx->OAR2 |= 0xE0;
}
}
/*******************************************************************************
* Function Name : WDG_PeriodValueConfig
* Description : Set the prescaler and counter reload value
* Input : Amount of time (us) needed
* Return : None
*******************************************************************************/
void WDG_PeriodValueConfig ( u32 Time )
{
unsigned int a;
unsigned long n, b;
n = Time * (RCCU_FrequencyValue(RCCU_PCLK) / 1000000);
FindFactors(n, &a, &b);
WDG->PR = a - 1;
WDG->VR = b - 1;
}
/*******************************************************************************
* Function Name : ADC12_PrescalerConfig
* Description : This function is used to configure the ADC sampling
* frequency by setting the prescaler register.
* Input : - Adc12_clk: specifies the sampling frequency in Hz.
* Output : None.
* Return : None.
*******************************************************************************/
void ADC12_PrescalerConfig(u32 Adc12_clk)
{
u32 temp = 0;
temp = (vu16)((RCCU_FrequencyValue(RCCU_PCLK2)*10) / (Adc12_clk * 512 * 8));
/* Configure the ADC12_CPR register with the nearest prescaler value */
if(temp - ((temp/10)*10) < 5)
{
ADC12->CPR = (u16)(temp/10);
}
else
{
ADC12->CPR = (u16)((temp/10)+1);
}
}
/*******************************************************************************
* Function Name : RCCU_PLL1Config
* Description : Configures the PLL1 division and multiplication factors.
* Input : - New_Mul: the PLL1 multiplication factor it can be:
* RCCU_PLL1_Mul_12, RCCU_PLL1_Mul_16,RCCU_PLL1_Mul_20,
* RCCU_PLL1_Mul_24
* - New_Div: the PLL1 division factor it can be:
* RCCU_Div_1, RCCU_Div_2, RCCU_Div_3, RCCU_Div_4,RCCU_Div_5,
* RCCU_Div_6, RCCU_Div_7
* Output : None.
* Return : None.
*******************************************************************************/
void RCCU_PLL1Config (RCCU_PLL1_Mul New_Mul, RCCU_PLL_Div New_Div)
{
/* Turn off the PLL1 by setting bits DX[2:0] */
RCCU->PLL1CR = 0x0007;
/* Set the PLL1 multiplication factor */
RCCU->PLL1CR = New_Mul << RCCU_MX_Index;
/* Set the PLL1 division factor */
RCCU->PLL1CR |= New_Div;
/* Set the PLL1 FREF_RANGE bit according to the PLL1 input frequency */
if (RCCU_FrequencyValue(RCCU_CLK2) > 3000000)
{
RCCU->PLL1CR |= RCCU_FREFRANGE_Mask;
}
/* Set the CK2_16 Bit in the CFR to allow PLL1 to be selected */
RCCU->CFR |= RCCU_CK2_16_Mask;
}
/*******************************************************************************
* Function Name : I2C_SpeedConfig
* Description : Selects I2C clock speed and configures its corresponding mode.
* Input : I2Cx ( I2C0 or I2C1 )
* Clock: I2C expected clock in Hertz.
* Return : None.
*******************************************************************************/
void I2C_SpeedConfig (I2C_TypeDef *I2Cx, u32 Clock)
{
u32 FCLK=0;
u16 result=0;
/* Get the FCLK frequency using the RCCU library */
FCLK = RCCU_FrequencyValue ( RCCU_FCLK );
/* Test on speed mode */
/* Update the CCR and ECCR are updated */
if (Clock <=100000)
/* Standard mode selected */
{
result = ((FCLK / Clock) - 7)/2;
/* Clear FM/SM bit */
I2Cx->CCR=result &0x7f;
}
else if (Clock <=400000)
{
/* Fast mode selected */
result = ((FCLK/Clock)-9)/3;
/* set FM/SM bit */
I2Cx->CCR=result |0x80;
}
I2Cx->ECCR= result >>7;
}
/*******************************************************************************
* Function Name : ADC12_PrescalerConfig
* Description : This routine is used to configure the prescaler register
* Input : Adc12_clk: Sampling frequency in Hz.
* Return : None.
*******************************************************************************/
void ADC12_PrescalerConfig(u32 Adc12_clk)
{
/* Update the Prescaler Register */
ADC12->CPR = (vu16) (RCCU_FrequencyValue(RCCU_PCLK)/(Adc12_clk*512*8));
}
/*******************************************************************************
* Function Name : UART_BaudRateConfig
* Description : This function configures the baud rate of the selected UART.
* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
* Input 2 : The baudrate value
* Output : None
* Return : None
*******************************************************************************/
void UART_BaudRateConfig(UART_TypeDef *UARTx, u32 BaudRate)
{
UARTx->BR = (u16)(RCCU_FrequencyValue(RCCU_FCLK)/(16UL * BaudRate));
}
