/**
* \brief AFEC(ADC) configuration.
*/
static void dsp_configure_adc(void)
{
pmc_enable_periph_clk(ID_AFEC0);
struct afec_config afec_cfg;
struct afec_ch_config afec_ch_cfg;
/* AFEC0 enable, init and configuration*/
afec_enable(AFEC0);
afec_get_config_defaults(&afec_cfg);
afec_init(AFEC0, &afec_cfg);
/* Set to Software trigger*/
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
/* AFEC0 channals configuration*/
afec_channel_enable(AFEC0,ADC_CHANNEL_POTENTIOMETER);
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_ch_set_config(AFEC0, ADC_CHANNEL_POTENTIOMETER,&afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_TEMPERATURE_SENSOR, &afec_ch_cfg);
/*
* Because the internal ADC offset is 0x800, it should cancel it and
* shift down to 0.
*/
afec_channel_set_analog_offset(AFEC0, ADC_CHANNEL_POTENTIOMETER, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_TEMPERATURE_SENSOR, 0x800);
afec_channel_enable(AFEC0,AFEC_TEMPERATURE_SENSOR);
afec_channel_enable(AFEC0,ADC_CHANNEL_MICROPHONE);
struct afec_temp_sensor_config afec_temp_sensor_cfg;
afec_temp_sensor_get_config_defaults(&afec_temp_sensor_cfg);
afec_temp_sensor_cfg.rctc = true;
afec_temp_sensor_set_config(AFEC0, &afec_temp_sensor_cfg);
/* Perform an auto cab on the ADC Channel 4. */
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) !=
AFEC_ISR_EOCAL);
/* Enable potentiometer channel, disable microphone. */
afec_channel_disable(AFEC0, ADC_CHANNEL_MICROPHONE);
afec_channel_enable(AFEC0, AFEC_TEMPERATURE_SENSOR);
afec_channel_enable(AFEC0, ADC_CHANNEL_MICROPHONE);
/* Start the first conversion*/
afec_start_software_conversion(AFEC0);
}
// Enable or disable a channel. Use AnalogCheckReady to make sure the ADC is ready before calling this.
void AnalogInEnableChannel(AnalogChannelNumber channel, bool enable)
{
if ((unsigned int)channel < numChannels)
{
if (enable)
{
activeChannels |= (1u << channel);
#if SAM3XA || SAM4S
adc_enable_channel(ADC, GetAdcChannel(channel));
#if SAM4S
adc_set_calibmode(ADC); // auto calibrate at start of next sequence
#endif
if (GetAdcChannel(channel) == ADC_TEMPERATURE_SENSOR)
{
adc_enable_ts(ADC);
}
#elif SAM4E || SAME70
afec_ch_config cfg;
afec_ch_get_config_defaults(&cfg);
afec_ch_set_config(GetAfec(channel), GetAfecChannel(channel), &cfg);
afec_channel_set_analog_offset(GetAfec(channel), GetAfecChannel(channel), 2048); // need this to get the full ADC range
afec_channel_enable(GetAfec(channel), GetAfecChannel(channel));
#if SAM4E
afec_start_calibration(GetAfec(channel)); // do automatic calibration
#endif
#endif
}
else
{
activeChannels &= ~(1u << channel);
#if SAM3XA || SAM4S
adc_disable_channel(ADC, GetAdcChannel(channel));
if (GetAdcChannel(channel) == ADC_TEMPERATURE_SENSOR)
{
adc_disable_ts(ADC);
}
#elif SAM4E || SAME70
afec_channel_disable(GetAfec(channel), GetAfecChannel(channel));
#endif
}
}
}
/**
* \brief Application entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint8_t uc_key;
/* Initialize the SAM system. */
sysclk_init();
board_init();
configure_console();
/* Output example information. */
puts(STRING_HEADER);
g_afec_sample_data.value = 0;
g_afec_sample_data.is_done = false;
g_max_digital = MAX_DIGITAL_12_BIT;
afec_enable(AFEC0);
struct afec_config afec_cfg;
afec_get_config_defaults(&afec_cfg);
afec_init(AFEC0, &afec_cfg);
struct afec_ch_config afec_ch_cfg;
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_POTENTIOMETER, &afec_ch_cfg);
/*
* Because the internal ADC offset is 0x800, it should cancel it and shift
* down to 0.
*/
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_POTENTIOMETER, 0x800);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
/* Enable channel for potentiometer. */
afec_channel_enable(AFEC0, AFEC_CHANNEL_POTENTIOMETER);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec_data_ready, 1);
display_menu();
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
while (1) {
afec_start_software_conversion(AFEC0);
delay_ms(1000);
/* Check if AFEC sample is done. */
if (g_afec_sample_data.is_done == true) {
printf("Potentiometer Voltage: %4d mv.",
(int)(g_afec_sample_data.value * VOLT_REF
/ g_max_digital));
puts("\r");
g_afec_sample_data.is_done = false;
}
/* Check if the user enters a key. */
if (!uart_read(CONF_UART, &uc_key)) {
/* Disable all afec interrupt. */
afec_disable_interrupt(AFEC0, AFEC_INTERRUPT_ALL);
set_afec_resolution();
afec_enable_interrupt(AFEC0, AFEC_INTERRUPT_DATA_READY);
}
}
}
void tempAdcRead(void)
{
struct afec_config afec_cfg;
struct afec_ch_config afec_ch_cfg;
delayCNT = 1000;
afec_enable(AFEC0);
afec_enable(AFEC1);
afec_get_config_defaults(&afec_cfg);
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_init(AFEC0, &afec_cfg);
afec_init(AFEC1, &afec_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_0, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_1, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_2, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_6, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_14, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_TEMPERATURE_SENSOR, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_0, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_1, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_2, &afec_ch_cfg);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_0, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_1, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_2, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_6, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_14, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_TEMPERATURE_SENSOR, 0x800);
afec_channel_set_analog_offset(AFEC1, AFEC_CHANNEL_0, 0x800);
afec_channel_set_analog_offset(AFEC1, AFEC_CHANNEL_1, 0x800);
afec_channel_set_analog_offset(AFEC1, AFEC_CHANNEL_2, 0x800);
afec_channel_enable(AFEC0, AFEC_CHANNEL_0);
afec_channel_enable(AFEC0, AFEC_CHANNEL_1);
afec_channel_enable(AFEC0, AFEC_CHANNEL_2);
afec_channel_enable(AFEC0, AFEC_CHANNEL_6);
afec_channel_enable(AFEC0, AFEC_CHANNEL_14);
afec_channel_enable(AFEC0, AFEC_TEMPERATURE_SENSOR);
afec_channel_enable(AFEC1, AFEC_CHANNEL_0);
afec_channel_enable(AFEC1, AFEC_CHANNEL_1);
afec_channel_enable(AFEC1, AFEC_CHANNEL_2);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_0, afec0_temp_adcRead_ch0, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_1, afec0_temp_adcRead_ch1, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_2, afec0_temp_adcRead_ch2, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_6, afec0_temp_adcRead_ch6, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_14, afec0_temp_adcRead_ch14, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_15, afec0_temp_adcRead_tempSensor, 1);
afec_set_callback(AFEC1, AFEC_INTERRUPT_EOC_0, afec1_temp_adcRead_ch0, 1);
afec_set_callback(AFEC1, AFEC_INTERRUPT_EOC_1, afec1_temp_adcRead_ch1, 1);
afec_set_callback(AFEC1, AFEC_INTERRUPT_EOC_2, afec1_temp_adcRead_ch2, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
afec_start_calibration(AFEC1);
while((afec_get_interrupt_status(AFEC1) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
}
/**
* \brief Set AFEC test mode.
*/
static void set_afec_test(void)
{
uint8_t uc_key;
struct afec_config afec_cfg;
struct afec_ch_config afec_ch_cfg;
display_menu();
afec_enable(AFEC0);
afec_get_config_defaults(&afec_cfg);
afec_ch_get_config_defaults(&afec_ch_cfg);
while (uart_read(CONF_UART, &uc_key));
switch (uc_key) {
case '0':
/*
* This test will use AFEC0 channel4 to connect with external input.
* Setting gain = 4, if external input voltage is 100mv,
* the ouput result should be 1650 + 100 * 4 = 2050mv .
*/
puts("Gain Test \n\r");
g_delay_cnt = 1000;
afec_init(AFEC0, &afec_cfg);
afec_ch_cfg.gain = AFEC_GAINVALUE_3;
afec_ch_set_config(AFEC0, AFEC_CHANNEL_4, &afec_ch_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_channel_enable(AFEC0, AFEC_CHANNEL_4);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec0_data_ready, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
break;
case '1':
/*
* This test will use AFEC0 channel5 to connect with potentiometer and
* AFEC1 channel0 to connect with external input. The AFEC0 conversion
* is triggered by software every 3s and AFEC1 conversion is triggered
* by TC every 1s.
*/
puts("Dual AFEC Conversion Test \n\r");
g_delay_cnt = 3000;
afec_enable(AFEC1);
afec_init(AFEC0, &afec_cfg);
afec_init(AFEC1, &afec_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_POTENTIOMETER, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_0, &afec_ch_cfg);
/*
* Because the internal AFEC offset is 0x800, it should cancel it and shift
* down to 0.
*/
afec_channel_set_analog_offset(AFEC1, AFEC_CHANNEL_0, 0x800);
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_POTENTIOMETER, 0x800);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
configure_tc_trigger();
afec_channel_enable(AFEC1, AFEC_CHANNEL_0);
afec_channel_enable(AFEC0, AFEC_CHANNEL_POTENTIOMETER);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec0_data_ready, 1);
afec_set_callback(AFEC1, AFEC_INTERRUPT_DATA_READY, afec1_data_ready, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
afec_start_calibration(AFEC1);
while((afec_get_interrupt_status(AFEC1) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
break;
case '2':
/*
* This test will use AFEC0 channl4 and channel5 as positive and
* negative input, so the output result is external input voltage subtracting
* potentiometer voltage. The differential voltage range is -1.65v~ +1.65v.
*/
puts("Differential Input Test \n\r");
g_delay_cnt = 1000;
afec_init(AFEC0, &afec_cfg);
afec_ch_cfg.diff = true;
afec_ch_set_config(AFEC0, AFEC_CHANNEL_POTENTIOMETER, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_4, &afec_ch_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_channel_enable(AFEC0, AFEC_CHANNEL_4);
afec_channel_enable(AFEC0, AFEC_CHANNEL_POTENTIOMETER);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec0_diff_data_ready, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
break;
case '3':
/*
* This test will configure user sequence channel1, channel0,
* so the first conversion is is channel1 and next is channel0.
* The output information will show this.
*/
puts("User Sequence Test \n\r");
g_delay_cnt = 1000;
afec_init(AFEC0, &afec_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_0, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_1, &afec_ch_cfg);
afec_channel_enable(AFEC0, AFEC_CHANNEL_0);
afec_channel_enable(AFEC0, AFEC_CHANNEL_1);
afec_configure_sequence(AFEC0, ch_list, 2);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_0, afec_eoc_0, 1);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_1, afec_eoc_1, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
break;
case '4':
/*
* This test use AFEC0 channel4 to connect with external input.
* It integrate the enhanced resolution test and gain and offset test.
*/
puts("Typical Application Test \n\r");
g_delay_cnt = 1000;
g_max_digital = MAX_DIGITAL_12_BIT * 16;
afec_cfg.resolution = AFEC_16_BITS;
afec_init(AFEC0, &afec_cfg);
afec_ch_cfg.gain = AFEC_GAINVALUE_3;
afec_ch_set_config(AFEC0, AFEC_CHANNEL_4, &afec_ch_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_channel_enable(AFEC0, AFEC_CHANNEL_4);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec0_data_ready, 1);
afec_start_calibration(AFEC0);
while((afec_get_interrupt_status(AFEC0) & AFEC_ISR_EOCAL) != AFEC_ISR_EOCAL);
break;
default:
puts("Please select feature test correctly! \n\r");
break;
}
}
