/**
* \brief Callback function for ADCIFE enter compasion window interrupt.
*/
static void adcife_set_wm_flag(void)
{
/* Disable Window Monitor Interrupt. */
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
g_uc_enter_win_flag = 1;
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
}
/* Initialize ADC for reading sensors */
void hal_adc_init(void)
{
/* Enable peripheral clock. */
#if SAM3S || SAM3N || SAM3XA || SAM4S
uint32_t i;
pmc_enable_periph_clk(ID_ADC);
#elif SAM3U
#ifdef ADC_12B
pmc_enable_periph_clk(ID_ADC12B);
#else
pmc_enable_periph_clk(ID_ADC);
#endif
#endif
/* Initialize ADC. */
#if SAM3S || SAM3N || SAM3XA || SAM4S
adc_init(ADC, SystemCoreClock, ADC_FREQ_MAX, ADC_STARTUP_FAST);
#elif SAM3U
#ifdef ADC_12B
adc12b_init(ADC12B, sysclk_get_cpu_hz(), 6400000, 10, 10);
#else
adc_init(ADC, sysclk_get_cpu_hz(), 6400000, 10);
#endif
#endif
//
adc_configure_timing(ADC, 0, ADC_SETTLING_TIME_3, 1);
adc_configure_trigger(ADC, ADC_TRIG_SW, 0); // Disable hardware trigger.
adc_disable_interrupt(ADC, 0xFFFFFFFF); // Disable all ADC interrupts.
adc_disable_all_channel(ADC);
}
// Module initialisation
void AnalogInInit()
{
#if SAM3XA || SAM4S
pmc_enable_periph_clk(ID_ADC);
adc_init(ADC, SystemCoreClock, 2000000, ADC_STARTUP_TIME_12); // 2MHz clock
adc_configure_timing(ADC, 3, ADC_SETTLING_TIME_3, 1); // Add transfer time
adc_configure_trigger(ADC, ADC_TRIG_SW, 0); // Disable hardware trigger
adc_disable_interrupt(ADC, 0xFFFFFFFF); // Disable all ADC interrupts
adc_disable_all_channel(ADC);
#elif SAM4E || SAME70
afec_enable(AFEC0);
afec_enable(AFEC1);
afec_config cfg;
afec_get_config_defaults(&cfg);
#if 0 // these are probably not needed, the defaults should be OK
// cfg.afec_clock = 2000000UL; // reduce clock frequency
// cfg.settling_time = AFEC_SETTLING_TIME_3;
#endif
while (afec_init(AFEC0, &cfg) != STATUS_OK)
{
(void)afec_get_latest_value(AFEC0);
}
while (afec_init(AFEC1, &cfg) != STATUS_OK)
{
(void)afec_get_latest_value(AFEC1);
}
afec_disable_interrupt(AFEC0, AFEC_INTERRUPT_ALL);
afec_disable_interrupt(AFEC1, AFEC_INTERRUPT_ALL);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_set_trigger(AFEC1, AFEC_TRIG_SW);
#endif
}
/**
* \brief Callback function for ADCIFE interrupt.
*/
static void adcife_set_conv_flag(void)
{
if ((adc_get_status(&g_adc_inst) & ADCIFE_SR_SEOC) == ADCIFE_SR_SEOC) {
g_uc_condone_flag = 1;
adc_clear_status(&g_adc_inst, ADCIFE_SCR_SEOC);
adc_disable_interrupt(&g_adc_inst, ADC_SEQ_SEOC);
}
}
/**
* \brief Application entry point for adcife example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint32_t uc_key = 0;
/* Initialize the SAM system */
sysclk_init();
board_init();
/* Initialize the UART console */
configure_console();
/* Output example information */
puts(STRING_HEADER);
/* Set default ADCIFE test mode. */
g_adc_test_mode.uc_trigger_mode = TRIGGER_MODE_SOFTWARE;
g_adc_test_mode.uc_pdc_en = 1;
g_adc_test_mode.uc_gain_en = 0;
display_menu();
start_dac();
start_adc();
while (1) {
/* ADCIFE software trigger per 1s */
if (g_adc_test_mode.uc_trigger_mode == TRIGGER_MODE_SOFTWARE) {
adc_start_software_conversion(&g_adc_inst);
}
if (!usart_read(CONF_UART, &uc_key)) {
adc_disable_interrupt(&g_adc_inst, ADC_SEQ_SEOC);
display_menu();
set_adc_test_mode();
start_adc();
puts("Press any key to display configuration menu.\r");
}
delay_ms(1000);
if (g_uc_condone_flag == 1) {
if(g_adc_test_mode.uc_pdc_en == 0) {
printf("Internal DAC Voltage = %4d mv \r\n",
(int)(g_adc_sample_data[0] * VOLT_REF / MAX_DIGITAL));
} else {
printf("Internal DAC Voltage = %4d mv \r\n",
(int)(g_adc_sample_data[0] * VOLT_REF /
MAX_DIGITAL));
printf("Scaled VCC Voltage = %4d mv \r\n",
(int)(g_adc_sample_data[1] * VOLT_REF /
MAX_DIGITAL));
}
g_uc_condone_flag = 0;
}
}
}
static void _adc_interrupt_handler(const uint8_t instance)
{
struct adc_module *module = _adc_instances[instance];
/* get interrupt flags and mask out enabled callbacks */
uint32_t flags = module->hw->INTFLAG.reg;
if (flags & ADC_INTFLAG_RESRDY) {
if ((module->enabled_callback_mask & (1 << ADC_CALLBACK_READ_BUFFER)) &&
(module->registered_callback_mask & (1 << ADC_CALLBACK_READ_BUFFER))) {
/* clear interrupt flag */
module->hw->INTFLAG.reg = ADC_INTFLAG_RESRDY;
while (adc_is_syncing(module)) {
/* Wait for synchronization */
}
/* store ADC result in job buffer */
*(module->job_buffer++) = module->hw->RESULT.reg;
if (--module->remaining_conversions > 0) {
if (module->software_trigger == true) {
adc_start_conversion(module);
}
} else {
if (module->job_status == STATUS_BUSY) {
/* job is complete. update status,disable interrupt
*and call callback */
module->job_status = STATUS_OK;
adc_disable_interrupt(module, ADC_INTERRUPT_RESULT_READY);
(module->callback[ADC_CALLBACK_READ_BUFFER])(module);
}
}
}
}
if (flags & ADC_INTFLAG_WINMON) {
module->hw->INTFLAG.reg = ADC_INTFLAG_WINMON;
if ((module->enabled_callback_mask & (1 << ADC_CALLBACK_WINDOW)) &&
(module->registered_callback_mask & (1 << ADC_CALLBACK_WINDOW))) {
(module->callback[ADC_CALLBACK_WINDOW])(module);
}
}
if (flags & ADC_INTFLAG_OVERRUN) {
module->hw->INTFLAG.reg = ADC_INTFLAG_OVERRUN;
if ((module->enabled_callback_mask & (1 << ADC_CALLBACK_ERROR)) &&
(module->registered_callback_mask & (1 << ADC_CALLBACK_ERROR))) {
(module->callback[ADC_CALLBACK_ERROR])(module);
}
}
}
/**
* \brief Aborts an ongoing job.
*
* Aborts an ongoing job.
*
* \param [in] module_inst Pointer to the ADC software instance struct
* \param [in] type Type of job to abort
*/
void adc_abort_job(
struct adc_module *module_inst,
enum adc_job_type type)
{
/* Sanity check arguments */
Assert(module_inst);
if (type == ADC_JOB_READ_BUFFER) {
/* Disable interrupt */
adc_disable_interrupt(module_inst, ADC_INTERRUPT_RESULT_READY);
/* Mark job as aborted */
module_inst->job_status = STATUS_ABORTED;
module_inst->remaining_conversions = 0;
}
}
/**
* \brief Callback function for ADCIFE interrupt.
*/
static void adcife_wm_handler(void)
{
uint32_t ul_mode;
uint16_t us_adc;
/* Disable Window Monitor Interrupt. */
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
if ((adc_get_status(&g_adc_inst) & ADCIFE_SR_WM) == ADCIFE_SR_WM) {
ul_mode = adc_get_wm_mode(&g_adc_inst);
us_adc = adc_get_last_conv_value(&g_adc_inst);
switch (ul_mode) {
case 1:
printf("-ISR-:DAC output voltage %d mv is above the low threshold:%d mv!\n\r",
(int)(us_adc * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_low_threshold * VOLT_REF / MAX_DIGITAL));
break;
case 2:
printf("-ISR-:DAC output voltage %d mv is below the high threshold:%d mv!\n\r",
(int)(us_adc * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_high_threshold * VOLT_REF / MAX_DIGITAL));
break;
case 3:
printf("-ISR-:DAC output voltage %d mv is in the comparison window:%d-%d mv!\n\r",
(int)(us_adc * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_low_threshold * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_high_threshold * VOLT_REF / MAX_DIGITAL));
break;
case 4:
printf("-ISR-:DAC output voltage %d mv is out of the comparison window:%d-%d mv!\n\r",
(int)(us_adc * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_low_threshold * VOLT_REF / MAX_DIGITAL),
(int)(gs_us_high_threshold * VOLT_REF / MAX_DIGITAL));
break;
}
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
}
}
void ADC_Handler(void)
{
uint32_t ul_mode;
uint16_t us_adc;
/* Disable Compare Interrupt. */
adc_disable_interrupt(ADC, ADC_IDR_COMPE);
if ((adc_get_status(ADC) & ADC_ISR_COMPE) == ADC_ISR_COMPE) {
ul_mode = adc_get_comparison_mode(ADC);
us_adc = adc_get_channel_value(ADC, ADC_CHANNEL_POTENTIOMETER);
switch (ul_mode) {
case 0:
printf("-ISR-:Potentiometer voltage %d mv is below the low "
"threshold:%d mv!\n\r", us_adc * VOLT_REF / MAX_DIGITAL,
gs_us_low_threshold * VOLT_REF / MAX_DIGITAL);
break;
case 1:
printf("-ISR-:Potentiometer voltage %d mv is above the high "
"threshold:%d mv!\n\r", us_adc * VOLT_REF / MAX_DIGITAL,
gs_us_high_threshold * VOLT_REF / MAX_DIGITAL);
break;
case 2:
printf("-ISR-:Potentiometer voltage %d mv is in the comparison "
"window:%d-%d mv!\n\r", us_adc * VOLT_REF / MAX_DIGITAL,
gs_us_low_threshold * VOLT_REF / MAX_DIGITAL, gs_us_high_threshold * VOLT_REF / MAX_DIGITAL);
break;
case 3:
printf("-ISR-:Potentiometer voltage %d mv is out of the comparison"
" window:%d-%d mv!\n\r", us_adc * VOLT_REF / MAX_DIGITAL,
gs_us_low_threshold * VOLT_REF / MAX_DIGITAL, gs_us_high_threshold * VOLT_REF / MAX_DIGITAL);
break;
}
}
}
/**
* \brief Start ADC sample.
* Initialize ADC, set clock and timing, and set ADC to given mode.
*/
static void start_adc(void)
{
struct adc_config adc_cfg = {
/* System clock division factor is 16 */
.prescal = ADC_PRESCAL_DIV16,
/* The APB clock is used */
.clksel = ADC_CLKSEL_APBCLK,
/* Max speed is 150K */
.speed = ADC_SPEED_150K,
/* ADC Reference voltage is 0.625*VCC */
.refsel = ADC_REFSEL_1,
/* Enables the Startup time */
.start_up = CONFIG_ADC_STARTUP
};
struct adc_seq_config adc_seq_cfg = {
/* Select Vref for shift cycle */
.zoomrange = ADC_ZOOMRANGE_0,
/* Pad Ground */
.muxneg = ADC_MUXNEG_1,
/* DAC internal */
.muxpos = ADC_MUXPOS_3,
/* Enables the internal voltage sources */
.internal = ADC_INTERNAL_3,
/* Disables the ADC gain error reduction */
.gcomp = ADC_GCOMP_DIS,
/* Disables the HWLA mode */
.hwla = ADC_HWLA_DIS,
/* 12-bits resolution */
.res = ADC_RES_12_BIT,
/* Enables the single-ended mode */
.bipolar = ADC_BIPOLAR_SINGLEENDED
};
struct adc_ch_config adc_ch_cfg = {
.seq_cfg = &adc_seq_cfg,
/* Internal Timer Max Counter */
.internal_timer_max_count = 60,
/* Window monitor mode is off */
.window_mode = 0,
.low_threshold = 0,
.high_threshold = 0,
};
if(adc_init(&g_adc_inst, ADCIFE, &adc_cfg) != STATUS_OK) {
puts("-F- ADC Init Fail!\n\r");
while(1);
}
if(adc_enable(&g_adc_inst) != STATUS_OK) {
puts("-F- ADC Enable Fail!\n\r");
while(1);
}
if (g_adc_test_mode.uc_pdc_en) {
adc_disable_interrupt(&g_adc_inst, ADC_SEQ_SEOC);
adc_pdca_set_config(&g_adc_pdca_cfg);
pdca_channel_set_callback(CONFIG_ADC_PDCA_RX_CHANNEL, pdca_transfer_done,
PDCA_0_IRQn, 1, PDCA_IER_TRC);
} else {
pdca_channel_disable_interrupt(CONFIG_ADC_PDCA_RX_CHANNEL,
PDCA_IDR_TRC);
pdca_channel_disable_interrupt(CONFIG_ADC_PDCA_TX_CHANNEL,
PDCA_IDR_TRC);
adc_ch_set_config(&g_adc_inst, &adc_ch_cfg);
adc_set_callback(&g_adc_inst, ADC_SEQ_SEOC, adcife_read_conv_result,
ADCIFE_IRQn, 1);
}
/* Configure trigger mode and start convention. */
switch (g_adc_test_mode.uc_trigger_mode) {
case TRIGGER_MODE_SOFTWARE:
adc_configure_trigger(&g_adc_inst, ADC_TRIG_SW);
break;
case TRIGGER_MODE_CON:
adc_configure_trigger(&g_adc_inst, ADC_TRIG_CON);
break;
case TRIGGER_MODE_ITIMER:
adc_configure_trigger(&g_adc_inst, ADC_TRIG_INTL_TIMER);
adc_configure_itimer_period(&g_adc_inst,
adc_ch_cfg.internal_timer_max_count);
adc_start_itimer(&g_adc_inst);
break;
default:
break;
}
if (g_adc_test_mode.uc_gain_en) {
adc_configure_gain(&g_adc_inst, ADC_GAIN_2X);
} else {
adc_configure_gain(&g_adc_inst, ADC_GAIN_1X);
}
}
/**
* \brief Start DAC ouput.
* Initialize DAC, set clock and timing, and set DAC to given mode.
*/
static void start_dac(void)
{
sysclk_enable_peripheral_clock(DACC);
/* Reset DACC registers */
dacc_reset(DACC);
/* Half word transfer mode */
dacc_set_transfer_mode(DACC, 0);
/* Timing:
* startup - 0x10 (17 clocks)
* internal trigger clock - 0x60 (96 clocks)
*/
dacc_set_timing(DACC, 0x10, 0x60);
/* Enable DAC */
dacc_enable(DACC);
/* The DAC is 10-bit resolution, so output voltage should be
* (3300 * 255) / ((1 << 10) - 1) = 823mv */
dacc_write_conversion_data(DACC, 0xFF);
}
void init( void )
{
SystemInit();
// Set Systick to 1ms interval, common to all SAM3 variants
if (SysTick_Config(SystemCoreClock / 1000))
{
// Capture error
while (true);
}
// Disable watchdog
WDT_Disable(WDT);
// Initialize C library
__libc_init_array();
// Disable pull-up on every pin
for (int i = 0; i < PINS_COUNT; i++)
digitalWrite(i, LOW);
// Enable parallel access on PIO output data registers
PIOA->PIO_OWER = 0xFFFFFFFF;
PIOB->PIO_OWER = 0xFFFFFFFF;
PIOC->PIO_OWER = 0xFFFFFFFF;
PIOD->PIO_OWER = 0xFFFFFFFF;
// Initialize Serial port U(S)ART pins
PIO_Configure(
g_APinDescription[PINS_UART].pPort,
g_APinDescription[PINS_UART].ulPinType,
g_APinDescription[PINS_UART].ulPin,
g_APinDescription[PINS_UART].ulPinConfiguration);
digitalWrite(0, HIGH); // Enable pullup for RX0
PIO_Configure(
g_APinDescription[PINS_USART0].pPort,
g_APinDescription[PINS_USART0].ulPinType,
g_APinDescription[PINS_USART0].ulPin,
g_APinDescription[PINS_USART0].ulPinConfiguration);
PIO_Configure(
g_APinDescription[PINS_USART1].pPort,
g_APinDescription[PINS_USART1].ulPinType,
g_APinDescription[PINS_USART1].ulPin,
g_APinDescription[PINS_USART1].ulPinConfiguration);
PIO_Configure(
g_APinDescription[PINS_USART3].pPort,
g_APinDescription[PINS_USART3].ulPinType,
g_APinDescription[PINS_USART3].ulPin,
g_APinDescription[PINS_USART3].ulPinConfiguration);
// Initialize USB pins
PIO_Configure(
g_APinDescription[PINS_USB].pPort,
g_APinDescription[PINS_USB].ulPinType,
g_APinDescription[PINS_USB].ulPin,
g_APinDescription[PINS_USB].ulPinConfiguration);
// Initialize CAN pins
/* PIO_Configure(
g_APinDescription[PINS_CAN0].pPort,
g_APinDescription[PINS_CAN0].ulPinType,
g_APinDescription[PINS_CAN0].ulPin,
g_APinDescription[PINS_CAN0].ulPinConfiguration);
PIO_Configure(
g_APinDescription[PINS_CAN1].pPort,
g_APinDescription[PINS_CAN1].ulPinType,
g_APinDescription[PINS_CAN1].ulPin,
g_APinDescription[PINS_CAN1].ulPinConfiguration); */
// Initialize Analog Controller
pmc_enable_periph_clk(ID_ADC);
adc_init(ADC, SystemCoreClock, ADC_FREQ_MAX, ADC_STARTUP_FAST);
adc_configure_timing(ADC, 0, ADC_SETTLING_TIME_3, 1);
adc_configure_trigger(ADC, ADC_TRIG_SW, 0); // Disable hardware trigger.
adc_disable_interrupt(ADC, 0xFFFFFFFF); // Disable all ADC interrupts.
adc_disable_all_channel(ADC);
// Initialize analogOutput module
analogOutputInit();
}
void init( void )
{
SystemInit();
// Set Systick to 1ms interval
if (SysTick_Config(SystemCoreClock / 1000))
{
// Capture error
while (true);
}
// Disable watchdog
WDT_Disable(WDT);
// Initialize C library
__libc_init_array();
// Disable pull-up on every pin
for (uint i = 0u; i < PINS_COUNT; i++)
digitalWrite(i, LOW);
// Enable parallel access on PIO output data registers
PIOA->PIO_OWER = 0xFFFFFFFF;
PIOB->PIO_OWER = 0xFFFFFFFF;
//PIOC->PIO_OWER = 0xFFFFFFFF;
//PIOD->PIO_OWER = 0xFFFFFFFF;
//turn off ERASE and JTAG pins
MATRIX->CCFG_SYSIO = CCFG_SYSIO_SYSIO12 | CCFG_SYSIO_SYSIO7 | CCFG_SYSIO_SYSIO6 | CCFG_SYSIO_SYSIO5 | CCFG_SYSIO_SYSIO4;
// Initialize Serial port UART pins
PIO_Configure(
g_APinDescription[PINS_USART0].pPort,
g_APinDescription[PINS_USART0].ulPinType,
g_APinDescription[PINS_USART0].ulPin,
g_APinDescription[PINS_USART0].ulPinConfiguration);
digitalWrite(0u, HIGH); // Enable pullup for RX0
// Initialize Serial port USART pins
// Pins are disconnected from PIO controller and hooked to the peripheral.
// Currently PIO_Configure always enables the pullup resistor for peripherals. This appears to be a bug, as it is not written correctly for that purpose, but has that affect.
PIO_Configure(
g_APinDescription[PINS_UART1].pPort,
g_APinDescription[PINS_UART1].ulPinType,
g_APinDescription[PINS_UART1].ulPin,
g_APinDescription[PINS_UART1].ulPinConfiguration);
PIO_Configure(
g_APinDescription[B1].pPort,
g_APinDescription[B1].ulPinType,
g_APinDescription[B1].ulPin,
g_APinDescription[B1].ulPinConfiguration);
/*
TODO: wire up USB ID line and check out USB configuration
// Initialize USB pins
PIO_Configure(
g_APinDescription[PINS_USB].pPort,
g_APinDescription[PINS_USB].ulPinType,
g_APinDescription[PINS_USB].ulPin,
g_APinDescription[PINS_USB].ulPinConfiguration);
//TODO: Initialize I2C pins for crypto IC
PIO_Configure(
g_APinDescription[PINS_SPI].pPort,
g_APinDescription[PINS_SPI].ulPinType,
g_APinDescription[PINS_SPI].ulPin,
g_APinDescription[PINS_SPI].ulPinConfiguration);
*/
// Initialize Analog Controller
pmc_enable_periph_clk(ID_ADC);
adc_init(ADC, SystemCoreClock, ADC_FREQ_MAX, ADC_STARTUP_FAST);
adc_configure_timing(ADC, 0, ADC_SETTLING_TIME_3, 1);
adc_configure_trigger(ADC, ADC_TRIG_SW, 0); // Disable hardware trigger.
adc_disable_interrupt(ADC, 0xFFFFFFFF); // Disable all ADC interrupts.
adc_disable_all_channel(ADC);
// Initialize analogOutput module
analogOutputInit();
}
/**
* \brief adc12 Application entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint32_t i;
uint8_t uc_key;
/* Initialize the SAM system. */
sysclk_init();
board_init();
configure_console();
/* Output example information. */
puts(STRING_HEADER);
puts("Configure system tick to get 1ms tick period.\r");
if (SysTick_Config(sysclk_get_cpu_hz() / 1000)) {
puts("-F- Systick configuration error\r");
while (1);
}
/* Set default ADC test mode. */
memset((void *)&g_adc_test_mode, 0, sizeof(g_adc_test_mode));
g_adc_test_mode.uc_trigger_mode = TRIGGER_MODE_SOFTWARE;
g_adc_test_mode.uc_pdc_en = 1;
g_adc_test_mode.uc_sequence_en = 0;
g_adc_test_mode.uc_gain_en = 0;
g_adc_test_mode.uc_offset_en = 0;
display_menu();
start_adc();
puts("Press any key to display configuration menu.\r");
while (1) {
/* ADC software trigger per 1s */
if (g_adc_test_mode.uc_trigger_mode == TRIGGER_MODE_SOFTWARE) {
mdelay(1000);
#if SAM3S || SAM3N || SAM3XA || SAM4S || SAM4C
adc_start(ADC);
#elif SAM3U
#ifdef ADC_12B
adc12b_start(ADC12B);
#else
adc_start(ADC);
#endif
#endif
}
/* Check if the user enters a key. */
if (!uart_read(CONSOLE_UART, &uc_key)) {
#if SAM3S || SAM3N || SAM3XA || SAM4S || SAM4C
adc_disable_interrupt(ADC, 0xFFFFFFFF); /* Disable all adc interrupt. */
#elif SAM3U
#ifdef ADC_12B
adc12b_disable_interrupt(ADC12B, 0xFFFFFFFF); /* Disable all adc interrupt. */
#else
adc_disable_interrupt(ADC, 0xFFFFFFFF); /* Disable all adc interrupt. */
#endif
#endif
tc_start(TC0, 0); /* Stop the Timer. */
#if SAM3S || SAM3U || SAM3XA || SAM4S
pwm_channel_disable(PWM, 0);
#endif
display_menu();
set_adc_test_mode();
start_adc();
puts("Press any key to display configuration menu.\r");
}
/* Check if ADC sample is done. */
if (g_adc_sample_data.us_done == ADC_DONE_MASK) {
for (i = 0; i < NUM_CHANNELS; i++) {
printf("CH%02d: %04d mv. ",
(int)g_adc_sample_data.uc_ch_num[i],
(int)(g_adc_sample_data.
us_value[i] *
VOLT_REF /
MAX_DIGITAL));
}
puts("\r");
g_adc_sample_data.us_done = 0;
}
}
}
/**
* \brief Turn on/off ADC module.
*
* \param on True to start ADC, false to turn off.
*/
static void demo_start_adc(bool on)
{
uint32_t low_threshold, high_threshold;
if (on == true) {
/* Check if already enabled */
if (demo_adc_on) {
return;
}
demo_config_adc();
/* Start TC0 and hardware trigger. */
tc_start(TC0, 1);
/* Get the potentiometer initial value */
pontentiometer_value = adc_get_channel_value(ADC,
ADC_CHANNEL_POTENTIOMETER);
/* Set Window threshold according to the initial values */
low_threshold = pontentiometer_value -
(NB_INTERVALS * (0x1000 / 256));
if (low_threshold > 0xf000000) {
low_threshold = 0;
}
high_threshold = pontentiometer_value +
(NB_INTERVALS * (0x1000 / 256));
if (high_threshold >= 0x1000) {
high_threshold = 0x1000 - 1;
}
pontentiometer_value
= pontentiometer_value*100 + 1;
/* Channel 5 has to be compared. */
adc_set_comparison_channel(ADC, ADC_CHANNEL_POTENTIOMETER);
/* Compare mode, out the window. */
adc_set_comparison_mode(ADC, ADC_EMR_CMPMODE_OUT);
/* Set up Threshold. */
adc_set_comparison_window(ADC, low_threshold,
high_threshold);
/* Enable ADC interrupt. */
NVIC_EnableIRQ(ADC_IRQn);
/* Enable Compare Interrupt. */
adc_enable_interrupt(ADC, ADC_IER_COMPE);
/* Set adc on flag */
demo_adc_on = 1;
/* Reset clapse time */
ppt_delay_clapse_counter = 0;
} else {
tc_stop(TC0, 1);
/* Enable ADC interrupt. */
NVIC_DisableIRQ(ADC_IRQn);
/* Enable Compare Interrupt. */
adc_disable_interrupt(ADC, ADC_IDR_COMPE);
/* Set adc off flag */
demo_adc_on = 0;
}
}
/**
* \brief Example entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint8_t c_choice;
int16_t s_adc_value;
int16_t s_dac_value;
int16_t s_threshold = 0;
float f_dac_data;
uint32_t ul_dac_data;
/* Initialize the SAM system. */
sysclk_init();
board_init();
configure_console();
/* Output example information. */
puts(STRING_HEADER);
/* Initialize threshold. */
gs_us_low_threshold = 500;
gs_us_high_threshold = 2000;
struct adc_config adc_cfg = {
/* System clock division factor is 16 */
.prescal = ADC_PRESCAL_DIV16,
/* The APB clock is used */
.clksel = ADC_CLKSEL_APBCLK,
/* Max speed is 150K */
.speed = ADC_SPEED_150K,
/* ADC Reference voltage is 0.625*VCC */
.refsel = ADC_REFSEL_1,
/* Enables the Startup time */
.start_up = CONFIG_ADC_STARTUP
};
struct adc_seq_config adc_seq_cfg = {
/* Select Vref for shift cycle */
.zoomrange = ADC_ZOOMRANGE_0,
/* Pad Ground */
.muxneg = ADC_MUXNEG_1,
/* DAC Internal */
.muxpos = ADC_MUXPOS_3,
/* Enables the internal voltage sources */
.internal = ADC_INTERNAL_3,
/* Disables the ADC gain error reduction */
.gcomp = ADC_GCOMP_DIS,
/* Disables the HWLA mode */
.hwla = ADC_HWLA_DIS,
/* 12-bits resolution */
.res = ADC_RES_12_BIT,
/* Enables the single-ended mode */
.bipolar = ADC_BIPOLAR_SINGLEENDED
};
struct adc_ch_config adc_ch_cfg = {
.seq_cfg = &adc_seq_cfg,
/* Internal Timer Max Counter */
.internal_timer_max_count = 60,
/* Window monitor mode is off */
.window_mode = ADC_WM_MODE_3,
/* The equivalent voltage value is 500 * VOLT_REF / 4095 = 251mv. */
.low_threshold = gs_us_low_threshold,
/* The equivalent voltage value is 2000 * VOLT_REF / 4095 = 1002mv. */
.high_threshold = gs_us_high_threshold,
};
start_dac();
if(adc_init(&g_adc_inst, ADCIFE, &adc_cfg) != STATUS_OK) {
puts("-F- ADC Init Fail!\n\r");
while(1);
}
if(adc_enable(&g_adc_inst) != STATUS_OK) {
puts("-F- ADC Enable Fail!\n\r");
while(1);
}
adc_ch_set_config(&g_adc_inst, &adc_ch_cfg);
adc_configure_trigger(&g_adc_inst, ADC_TRIG_CON);
adc_configure_gain(&g_adc_inst, ADC_GAIN_1X);
adc_set_callback(&g_adc_inst, ADC_WINDOW_MONITOR, adcife_wm_handler,
ADCIFE_IRQn, 1);
/* Display main menu. */
display_menu();
while (1) {
scanf("%c", (char *)&c_choice);
printf("%c\r\n", c_choice);
switch (c_choice) {
case '0':
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
printf("DAC output is set to(mv) from 0mv to %dmv: ",
(int32_t)VOLT_REF);
s_dac_value = get_voltage();
puts("\r");
f_dac_data = (float)s_dac_value * DACC_MAX_DATA / VDDANA;
ul_dac_data = f_to_int(f_dac_data);
if (s_dac_value >= 0) {
dacc_write_conversion_data(DACC, ul_dac_data);
}
delay_ms(100);
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
adc_enable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
break;
case '1':
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
printf("Low threshold is set to(mv) from 0mv to %dmv: ",
(int32_t)VOLT_REF);
s_threshold = get_voltage();
puts("\r");
if (s_threshold >= 0) {
s_adc_value = s_threshold * MAX_DIGITAL /
VOLT_REF;
adc_configure_wm_threshold(&g_adc_inst,
s_adc_value,
gs_us_high_threshold);
/* Renew low threshold. */
gs_us_low_threshold = s_adc_value;
float f_low_threshold =
(float)gs_us_low_threshold *
VOLT_REF / MAX_DIGITAL;
uint32_t ul_low_threshold =
f_to_int(f_low_threshold);
printf("Setting low threshold to %u mv (reg value to 0x%x ~%d%%)\n\r",
ul_low_threshold, gs_us_low_threshold,
gs_us_low_threshold * 100 / MAX_DIGITAL);
}
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
adc_enable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
break;
case '2':
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
printf("High threshold is set to(mv)from 0mv to %dmv:",
(int32_t)VOLT_REF);
s_threshold = get_voltage();
puts("\r");
if (s_threshold >= 0) {
s_adc_value = s_threshold * MAX_DIGITAL /
VOLT_REF;
adc_configure_wm_threshold(&g_adc_inst,
gs_us_low_threshold,
s_adc_value);
/* Renew high threshold. */
gs_us_high_threshold = s_adc_value;
float f_high_threshold =
(float)gs_us_high_threshold *
VOLT_REF / MAX_DIGITAL;
uint32_t ul_high_threshold =
f_to_int(f_high_threshold);
printf("Setting high threshold to %u mv (reg value to 0x%x ~%d%%)\n\r",
ul_high_threshold, gs_us_high_threshold,
gs_us_high_threshold * 100 / MAX_DIGITAL);
}
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
adc_enable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
break;
case '3':
adc_disable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
puts("-a. Above low threshold.\n\r"
"-b. Below high threshold.\n\r"
"-c. In the comparison window.\n\r"
"-d. Out of the comparison window.\n\r"
"-q. Quit the setting.\r");
c_choice = get_wm_mode();
adc_configure_wm_mode(&g_adc_inst, c_choice);
printf("Comparison mode is %c.\n\r", 'a' + c_choice - 1);
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
adc_enable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
break;
case 'm':
display_menu();
break;
case 'i':
display_info();
adc_clear_status(&g_adc_inst, ADCIFE_SCR_WM);
adc_enable_interrupt(&g_adc_inst, ADC_WINDOW_MONITOR);
break;
}
puts("Press \'m\' or \'M\' to display the main menu again!\r");
}
}
