/**
* \brief Initializes the ADCIFB module with trigger
* - Initialize the trigger mode & compare interrupts for ADCIFB
*
* \retval STATUS_OK Configuration OK
* \retval ERR_TIMEOUT Timeout on configuring ADCIFB module
* \retval ERR_BUSY ADCIFB module unable to configure the trigger
*/
static status_code_t adc_init()
{
/* GPIO pin/adc - function map. */
static const gpio_map_t ADCIFB_GPIO_MAP = {
{EXAMPLE_ADCIFB_PIN, EXAMPLE_ADCIFB_FUNCTION}
};
/* ADCIFB Configuration */
adcifb_opt_t adcifb_opt = {
/* Resolution mode */
.resolution = AVR32_ADCIFB_ACR_RES_10BIT,
/* Channels Sample & Hold Time in [0,15] */
.shtim = ADC_SAMPLE_HOLD_TIME,
/* ADC Clock Prescaler */
.ratio_clkadcifb_clkadc = (sysclk_get_pba_hz()) / ADC_FREQUENCY,
.startup = ADC_STARTUP_TIME,
/* ADCIFB Sleep Mode enabled */
.sleep_mode_enable = true
};
/* Disable pull up on ADCIFB channel input pin */
gpio_disable_pin_pull_up(EXAMPLE_ADCIFB_PIN);
/* Enable the ADC pins */
gpio_enable_module(ADCIFB_GPIO_MAP,
sizeof(ADCIFB_GPIO_MAP) / sizeof(ADCIFB_GPIO_MAP[0]));
/* Enable ADCIFB clock */
sysclk_enable_pba_module(SYSCLK_ADCIFB);
/* Configure the ADCIFB peripheral */
if (adcifb_configure(adcifb, &adcifb_opt)) {
/* Error configuring the ADCIFB */
return ERR_TIMEOUT;
}
/* Configure the trigger for ADCIFB peripheral */
if (adcifb_configure_trigger(adcifb, AVR32_ADCIFB_TRGR_TRGMOD_EVT, 0)) {
/* Error configuring the trigger for ADCIFB */
return ERR_BUSY;
}
/* Enable ADCIFB Channel 0 */
adcifb_channels_enable(adcifb, EXAMPLE_ADCIFB_CHANNEL);
/* Disable global interrupts */
cpu_irq_disable();
/*
* Initialize the interrupt vectors
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_initialize_vectors();
/*
* Register the ADCIFB interrupt handler
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_register_handler(&ADCIFB_interrupt_handler, AVR32_ADCIFB_IRQ,
ADC_INTERRUPT_PRIORITY);
/*
* Set the threshold value in CVR.LV register to generate interrupt
* when the value detected is above the threshold.
* 1.500 V with 10-bit resolution
*/
adcifb_set_high_compare_value(adcifb, ADC_COMPARE_VALUE);
/* Enable the Analog Compare option in ADCIFB */
adcifb_enable_analog_compare_mode(adcifb);
/* Enable the data ready interrupt for ADCIFB */
adcifb_enable_compare_gt_interrupt(adcifb);
return STATUS_OK;
} /* End of adc_init() */
/**
* \brief Asynchronous Timer Initialization
* - Start the 32KHz Oscillator
* - Initializes the AST module with periodic trigger events
*
* \retval STATUS_OK Configuration OK
* \retval ERR_TIMEOUT Error in configuring the AST module
*/
static status_code_t ast_init()
{
/* Initial Count value to write in AST */
unsigned long ast_counter = 0;
/* Set the prescaler to set a periodic trigger from AST */
avr32_ast_pir0_t pir = {
.insel = AST_TRIGGER_PRESCALER
};
/* Set the OSC32 parameters */
scif_osc32_opt_t osc32_opt = {
.mode = SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR,
.startup = OSC32_STARTUP_8192,
.pinsel = BOARD_OSC32_PINSEL,
.en1k = false,
.en32k = true
};
/* Enable the 32KHz Oscillator */
scif_start_osc32(&osc32_opt, true);
/* Enable the Peripheral Event System Clock */
sysclk_enable_hsb_module(SYSCLK_EVENT);
/* Enable PBA clock for AST clock to switch its source */
sysclk_enable_pba_module(SYSCLK_AST);
/* Initialize the AST in counter mode */
if (!ast_init_counter(&AVR32_AST, AST_CLOCK_SOURCE, AST_PRESCALER,
ast_counter)) {
return ERR_TIMEOUT;
}
/* Initialize the periodic value register with the prescaler */
ast_set_periodic0_value(&AVR32_AST, pir);
/* Enable the AST periodic event */
ast_enable_periodic0(&AVR32_AST);
/* Clear All AST Interrupt request and clear SR */
ast_clear_all_status_flags(&AVR32_AST);
/* Enable the AST */
ast_enable(&AVR32_AST);
/* Disable PBA clock for AST after switching its source to OSC32 */
sysclk_disable_pba_module(SYSCLK_AST);
return STATUS_OK;
} /* End of ast_init() */
/**
* \brief Low Power Configuration
* Initializes the power saving measures to reduce power consumption
* - Enable pullups on GPIO pins
* - Disable the clocks to unused modules
* - Disable internal voltage regulator when in 1.8V supply mode
*/
static void power_save_measures_init()
{
uint8_t i;
uint32_t gpio_mask[AVR32_GPIO_PORT_LENGTH] = {0};
/*
* Enable internal pull-ups on all unused GPIO pins
* Note: Pull-ups on Oscillator or JTAG pins can be enabled only if they
* are not used as an oscillator or JTAG pin respectively.
*/
for (i = 0; i < (sizeof(gpio_used_pins) / sizeof(uint32_t)); i++) {
gpio_mask[gpio_used_pins[i] >>
5] |= 1 << (gpio_used_pins[i] & 0x1F);
}
for (i = 0; i < AVR32_GPIO_PORT_LENGTH; i++) {
gpio_configure_group(i, ~(gpio_mask[i]),
GPIO_PULL_UP | GPIO_DIR_INPUT);
}
/* Disable OCD clock which is not disabled by sysclk service */
sysclk_disable_cpu_module(SYSCLK_OCD);
#if POWER_SUPPLY_MODE_1_8V
/*
* When using 1.8V Single supply mode, the Voltage Regulator can be
* shut-down using the code below, in-order to save power.
* See Voltage Regulator Calibration Register in datasheet for more
*info.
* CAUTION: When using 3.3V Single supply mode, the Voltage Regulator
* cannot be shut-down and the application will hang in this loop.
*/
uint32_t tmp = (AVR32_SCIF.vregcr);
tmp &= (~(1 << 5 | 1 << 18));
AVR32_SCIF.unlock = 0xAA000000 | AVR32_SCIF_VREGCR;
AVR32_SCIF.vregcr = tmp;
/* Wait until internal voltage regulator is disabled. */
while ((AVR32_SCIF.vregcr & 0x00040020)) {
}
#endif
} /* End of power_save_measures_init() */
/**
* \brief Initializes the ACIFB module with trigger
* - Start the GCLK for ACIFB
* - Initialize the trigger mode & compare interrupts for ACIFB
*
* \retval STATUS_OK Configuration OK
* \retval ERR_TIMEOUT Timeout on configuring ACIFB module
* \retval ERR_BUSY ACIFB module unable to configure the trigger
*/
static status_code_t ac_init()
{
/* struct genclk_config gcfg; */
uint32_t div = sysclk_get_pba_hz() / AC_GCLK_FREQUENCY;
scif_gc_setup(AC_GCLK_ID, AC_GCLK_SRC, AVR32_GC_DIV_CLOCK, div);
/* Now enable the generic clock */
scif_gc_enable(AC_GCLK_ID);
/* GPIO pin/acifb - function map. */
static const gpio_map_t ACIFB_GPIO_MAP = {
{EXAMPLE_ACIFBP_PIN, EXAMPLE_ACIFBP_FUNCTION},
{EXAMPLE_ACIFBN_PIN, EXAMPLE_ACIFBN_FUNCTION},
};
/* ACIFB Configuration */
const acifb_t acifb_opt = {
.sut = 6, /* Resolution mode */
.actest = TESTMODE_OFF,
.eventen = true
};
/* ACIFB Channel Configuration */
const acifb_channel_t acifb_channel_opt = {
/* Filter length */
.filter_len = 0,
/* Hysteresis value */
.hysteresis_value = 0,
/* Output event when ACOUT is zero? */
.event_negative = false,
/* Output event when ACOUT is one? */
.event_positive = false,
/* Set the positive input */
.positive_input = PI_ACP,
/* Set the negative input */
.negative_input = NI_ACN,
/* Set the comparator mode */
.mode = MODE_EVENT_TRIGGERED,
/* Interrupt settings */
.interrupt_settings = IS_VINP_LT_VINN,
/* Analog comparator channel number */
.ac_n = EXAMPLE_ACIFB_CHANNEL
};
/* Enable Analog Comparator clock */
sysclk_enable_pba_module(SYSCLK_ACIFB);
/* Disable pullup on ACIFB channel input pins */
gpio_disable_pin_pull_up(EXAMPLE_ACIFBP_PIN);
gpio_disable_pin_pull_up(EXAMPLE_ACIFBN_PIN);
/* Enable the ACIFB pins */
gpio_enable_module(ACIFB_GPIO_MAP,
sizeof(ACIFB_GPIO_MAP) / sizeof(ACIFB_GPIO_MAP[0]));
/* Configure the ACIFB peripheral */
acifb_setup_and_enable(acifb, &acifb_opt);
/* Configure the ACIFB channel with interrupt & trigger */
acifb_channels_setup(acifb, &acifb_channel_opt, AC_NB_CHANNELS);
/* Disable global interrupts */
cpu_irq_disable();
/*
* Initialize the interrupt vectors
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_initialize_vectors();
/*
* Register the ACIFB interrupt handler
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_register_handler(&ACIFB_interrupt_handler, AVR32_ACIFB_IRQ,
AC_INTERRUPT_PRIORITY);
/* Enable Analog Comparator Channel interrupt */
acifb_enable_comparison_interrupt(acifb, EXAMPLE_ACIFB_CHANNEL);
/* Enable global interrupts */
cpu_irq_enable();
return STATUS_OK;
} /* End of ac_init() */
/**
* \brief Asynchronous Timer Initialization
* - Start the 32KHz Oscillator
* - Initializes the AST module with periodic trigger events
*
* \retval STATUS_OK Configuration OK
* \retval ERR_BUSY Error in configuring the AST module
*/
static status_code_t ast_init()
{
/* Initial Count value to write in AST */
unsigned long ast_counter = 0;
/* Set the prescaler to set a periodic trigger from AST */
avr32_ast_pir0_t pir = {
.insel = AST_TRIGGER_PRESCALER
};
/* Set the OSC32 parameters */
scif_osc32_opt_t osc32_opt = {
.mode = SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR,
.startup = OSC32_STARTUP_8192,
.pinsel = BOARD_OSC32_PINSEL,
.en1k = false,
.en32k = true
};
/* Enable the 32KHz Oscillator */
scif_start_osc32(&osc32_opt, true);
/* Enable the Peripheral Event System Clock */
sysclk_enable_hsb_module(SYSCLK_EVENT);
/* Enable PBA clock for AST clock to switch its source */
sysclk_enable_pba_module(SYSCLK_AST);
/* Initialize the AST in counter mode */
if (!ast_init_counter(&AVR32_AST, AST_CLOCK_SOURCE, AST_PRESCALER,
ast_counter)) {
return ERR_BUSY;
}
/* Initialize the periodic value register with the prescaler */
ast_set_periodic0_value(&AVR32_AST, pir);
/* Enable the AST periodic event */
ast_enable_periodic0(&AVR32_AST);
/* Clear All AST Interrupt request and clear SR */
ast_clear_all_status_flags(&AVR32_AST);
/* Enable the AST */
ast_enable(&AVR32_AST);
/* Disable PBA clock for AST after switching its source to OSC32 */
sysclk_disable_pba_module(SYSCLK_AST);
return STATUS_OK;
} /* End of ast_init() */
/**
* \brief Low Power Configuration
* Initializes the power saving measures to reduce power consumption
* - Enable pull-ups on GPIO pins
* - Disable the clocks to unwanted modules
* - Disable internal voltage regulator when in 1.8V supply mode
*/
static void power_save_measures_init()
{
uint8_t i;
uint32_t gpio_mask[AVR32_GPIO_PORT_LENGTH] = {0};
/*
* Enable internal pull-ups on all unused GPIO pins
* Note: Pull-ups on Oscillator or JTAG pins can be enabled only if they
* are not used as an oscillator or JTAG pin respectively.
*/
for (i = 0; i < (sizeof(gpio_used_pins) / sizeof(uint32_t)); i++) {
gpio_mask[gpio_used_pins[i] >>
5] |= 1 << (gpio_used_pins[i] & 0x1F);
}
for (i = 0; i < AVR32_GPIO_PORT_LENGTH; i++) {
gpio_configure_group(i, ~(gpio_mask[i]),
GPIO_PULL_UP | GPIO_DIR_INPUT);
}
/* Disable OCD clock which is not disabled by sysclk service */
sysclk_disable_cpu_module(SYSCLK_OCD);
#if POWER_SUPPLY_MODE_1_8V
/*
* When using 1.8V Single supply mode, the Voltage Regulator can be
* shut-down using the code below, in-order to save power.
* See Voltage Regulator Calibration Register in datasheet for more
*info.
* CAUTION: When using 3.3V Single supply mode, the Voltage Regulator
* cannot be shut-down and the application will hang in this loop.
*/
uint32_t tmp = (AVR32_SCIF.vregcr);
tmp &= (~(1 << 5 | 1 << 18));
AVR32_SCIF.unlock = 0xAA000000 | AVR32_SCIF_VREGCR;
AVR32_SCIF.vregcr = tmp;
/* Wait until internal voltage regulator is disabled. */
while ((AVR32_SCIF.vregcr & 0x00040020)) {
}
#endif
} /* End of power_save_measures_init() */
static status_code_t ast_init()
{
/* Initial Count value to write in AST */
unsigned long ast_counter = 0;
/* Set the prescaler to set a periodic trigger from AST */
avr32_ast_pir0_t pir = {
.insel = AST_TRIGGER_PRESCALER
};
/* Set the OSC32 parameters */
scif_osc32_opt_t osc32_opt = {
#if BOARD_OSC32_IS_XTAL
.mode = SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR,
#else
.mode = SCIF_OSC_MODE_EXT_CLK,
#endif
.startup = OSC32_STARTUP_8192,
.pinsel = BOARD_OSC32_PINSEL,
.en1k = false,
.en32k = true
};
/* Enable the 32KHz Oscillator */
scif_start_osc32(&osc32_opt, true);
/* Enable the Peripheral Event System Clock */
sysclk_enable_hsb_module(SYSCLK_EVENT);
/* Enable PBA clock for AST clock to switch its source */
sysclk_enable_pba_module(SYSCLK_AST);
/* Initialize the AST in counter mode */
if (!ast_init_counter(&AVR32_AST, AST_CLOCK_SOURCE, AST_PRESCALER,
ast_counter)) {
return ERR_BUSY; /* Check AST timer */
}
/* Initialize the periodic value register with the prescaler */
ast_set_periodic0_value(&AVR32_AST, pir);
/* Enable the AST periodic event */
ast_enable_periodic0(&AVR32_AST);
/* Clear All AST Interrupt request and clear SR */
ast_clear_all_status_flags(&AVR32_AST);
/* Enable the AST */
ast_enable(&AVR32_AST);
/* Disable PBA clock for AST after switching its source to OSC32 */
sysclk_disable_pba_module(SYSCLK_AST);
return STATUS_OK;
} /* End of ast_init() */
#endif
/**
* \brief Low Power Configuration
* Initializes the power saving measures to reduce power consumption
* - Enable pull ups on GPIO pins
* - Disable the clocks to unwanted modules
* - Disable internal voltage regulator when in 1.8V supply mode
*/
void power_save_measures_init()
{
uint8_t i;
uint32_t gpio_mask[AVR32_GPIO_PORT_LENGTH] = {0};
/*
* Enable internal pull-ups on all unused GPIO pins
* Note: Pull-ups on Oscillator or JTAG pins can be enabled only if they
* are not used as an oscillator or JTAG pin respectively.
*/
for (i = 0; i < (sizeof(gpio_used_pins) / sizeof(uint32_t)); i++) {
gpio_mask[gpio_used_pins[i] >>
5] |= 1 << (gpio_used_pins[i] & 0x1F);
}
for (i = 0; i < AVR32_GPIO_PORT_LENGTH; i++) {
gpio_configure_group(i, gpio_mask[i],
GPIO_PULL_UP | GPIO_DIR_INPUT);
}
/* Disable OCD clock which is not disabled by sysclk service */
sysclk_disable_cpu_module(SYSCLK_OCD);
#if POWER_SUPPLY_MODE_1_8V
/*
* When using 1.8V Single supply mode, the Voltage Regulator can be
* shut-down using the code below, in-order to save power.
* See Voltage Regulator Calibration Register in datasheet for more
*info.
* CAUTION: When using 3.3V Single supply mode, the Voltage Regulator
* cannot be shut-down and the application will hang in this loop.
*/
uint32_t tmp = (AVR32_SCIF.vregcr);
tmp &= (~(1 << 5));
AVR32_SCIF.unlock = 0xAA000000 | AVR32_SCIF_VREGCR;
AVR32_SCIF.vregcr = tmp;
/* Wait until internal voltage regulator is disabled. */
while ((AVR32_SCIF.vregcr & 0x20)) {
}
#endif
} /* End of power_save_measures_init() */
