void SW3_InterruptCB(void)
{
bool err = true;
uint8_t status = 0x00;
// Fetch input edge status
err &= R_INTC_GetExtInterruptStatus
(
PDL_INTC_IRQ4,
&status
);
// Check if interrupt was triggered from falling edge
if((status & 0x0C) == 0x04)
{
// Disable switch interrupts and change to rising edge detection
err &= R_INTC_ControlExtInterrupt
(
PDL_INTC_IRQ4,
PDL_INTC_DISABLE|PDL_INTC_RISING
);
// Check if switch press callback function is not NULL
if(SwitchPressCallbackFunc)
{
// Execute user callback function
SwitchPressCallbackFunc(SWITCH_3);
}
}
else
{
// Switch to falling edge detection
err &= R_INTC_ControlExtInterrupt
(
PDL_INTC_IRQ4,
PDL_INTC_FALLING
);
if(SwitchReleaseCallbackFunc)
{
SwitchReleaseCallbackFunc(SWITCH_3);
}
}
// Create 10ms one-shot timer interrupt to de-bounce the switch input
err &= R_CMT_CreateOneShot
(
1,
PDL_NO_DATA,
10E-3,
SwitchDebounceCB,
8
);
while(!err)
;
}
void ConfigureOperatingFrequency(void)
{
bool err = true;
//Configure the PLL to use the 20.0 MHz crystal as clock input
err &= R_CGC_Set
(
PDL_CGC_CLK_MAIN,
PDL_CGC_BCLK_DIV_1 | PDL_CGC_MAIN_RESONATOR,
20E6,
20E6,
20E6,
20E6,
20E6,
PDL_NO_DATA
);
/* Configure the clocks as follows -
Clock Description Frequency
----------------------------------------
PLL Clock frequency...............100MHz
System Clock Frequency.............50MHz
Peripheral Module Clock B..........25MHz
Peripheral Module Clock D..........50MHz
FlashIF Clock......................25MHz
External Bus Clock.................25MHz */
err &= R_CGC_Set
(
PDL_CGC_CLK_PLL,
PDL_CGC_BCLK_DIV_2,
100E6,
50E6,
50E6,
25E6,
25E6,
25E6
);
// Allow 100us for the main clock to stabilize
err &= R_CMT_CreateOneShot
(
0,
PDL_NO_DATA,
100E-6,
PDL_NO_FUNC,
0
);
// Change to high-speed operating mode
err &= R_LPC_Control(
PDL_LPC_CHANGE_HIGH_SPEED
);
// Select the PLL as the clock source
err &= R_CGC_Control
(
PDL_CGC_CLK_PLL,
PDL_CGC_SUB_CLOCK_CL_STANDARD,
PDL_CGC_SUB_CLOCK_ENABLE
);
while(!err)
;
}
/******************************************************************************
* Outline : SW3_InterruptCB
* Description : Switch 3 callback ISR function. The function disables switch
* interrupts, then uses a oneshot timer to re-enable them after
* a 10ms debounce timer period.
* Argument : none
* Return value : none
******************************************************************************/
void SW3_InterruptCB(void)
{
/* Declare error flag */
bool err = true;
/* Declare status container variable */
uint8_t status = 0x00;
/* Fetch input edge status */
err &= R_INTC_GetExtInterruptStatus
(
PDL_INTC_IRQ10,
&status
);
/* Check if interrupt was triggered from falling edge */
if ((status & 0x06) == 0x04)
{
/* Disable switch interrupts and change to rising edge detection */
err &= R_INTC_ControlExtInterrupt
(
PDL_INTC_IRQ10,
PDL_INTC_DISABLE | PDL_INTC_RISING
);
/* Set global switch flag to indicate SW3 is held down */
gSwitchFlag |= 0x02;
/* Check if switch press callback function is not NULL */
if (gSwitchPressCallbackFunc)
{
/* Execute user callback function */
gSwitchPressCallbackFunc();
}
}
else
{
/* Switch to falling edge detection */
err &= R_INTC_ControlExtInterrupt
(
PDL_INTC_IRQ10,
PDL_INTC_FALLING
);
/* Clear SW3 held-down bit in switch flag */
gSwitchFlag &= 0xFD;
/* Set global switch flag to indicate SW3 press complete */
gSwitchFlag |= 0x20;
/* Check if switch release callback function is not NULL */
if (gSwitchReleaseCallbackFunc)
{
/* Execute user callback function */
gSwitchReleaseCallbackFunc();
}
}
/* Set standby ready flag as false */
gSwitchStandbyReady = false;
/* Create 10ms one-shot timer interrupt to debounce the switch input */
err &= R_CMT_CreateOneShot
(
1,
PDL_NO_DATA,
10E-3,
SwitchDebounceCB,
8
);
/* Halt in while loop when RPDL errors detected */
while (!err);
}
