// 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 Application entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
int32_t ul_vol;
int32_t ul_temp;
/* Initialize the SAM system. */
sysclk_init();
board_init();
configure_console();
/* Output example information. */
puts(STRING_HEADER);
afec_enable(AFEC0);
struct afec_config afec_cfg;
afec_get_config_defaults(&afec_cfg);
afec_init(AFEC0, &afec_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
struct afec_ch_config afec_ch_cfg;
afec_ch_get_config_defaults(&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, AFEC_TEMPERATURE_SENSOR, 0x800);
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);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_15,
afec_temp_sensor_end_conversion, 1);
while (1) {
if(is_conversion_done == true) {
ul_vol = g_ul_value * VOLT_REF / MAX_DIGITAL;
/*
* According to datasheet, The output voltage VT = 1.44V at 27C
* and the temperature slope dVT/dT = 4.7 mV/C
*/
ul_temp = (ul_vol - 1440) * 100 / 470 + 27;
printf("Temperature is: %4d\r", (int)ul_temp);
is_conversion_done = false;
}
}
}
/**
* \brief Configure to trigger AFEC by TIOA output of timer.
*/
static void configure_tc_trigger(void)
{
uint32_t ul_div = 0;
uint32_t ul_tc_clks = 0;
uint32_t ul_sysclk = sysclk_get_cpu_hz();
/* Enable peripheral clock. */
pmc_enable_periph_clk(ID_TC0);
/* TIOA configuration */
ioport_set_pin_mode(PIN_TC0_TIOA0, PIN_TC0_TIOA0_FLAGS);
ioport_disable_pin(PIN_TC0_TIOA0);
/* Configure TC for a 10Hz frequency and trigger on RC compare. */
tc_find_mck_divisor(10, ul_sysclk, &ul_div, &ul_tc_clks, ul_sysclk);
tc_init(TC0, 0, ul_tc_clks | TC_CMR_CPCTRG | TC_CMR_WAVE |
TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_SET);
TC0->TC_CHANNEL[0].TC_RA = (ul_sysclk / ul_div) / 2;
TC0->TC_CHANNEL[0].TC_RC = (ul_sysclk / ul_div) / 1;
/* Start the Timer. */
tc_start(TC0, 0);
afec_set_trigger(AFEC0, AFEC_TRIG_TIO_CH_0);
}
/**
* \brief Test AFEC in comparsion window mode.
*
* \param test Current test case.
*/
static void run_afec_comp_test(const struct test_case *test)
{
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_set_comparison_mode(AFEC0, AFEC_CMP_MODE_2, AFEC_CHANNEL_1, 0);
afec_set_comparison_window(AFEC0, 0, 0xFFF);
afec_set_callback(AFEC0, AFEC_INTERRUPT_COMP_ERROR,
afec_set_comp_flag, 1);
afec_start_software_conversion(AFEC0);
delay_ms(100);
test_assert_true(test, is_comp_event_flag == true,
"AFEC Comparsion Window test failed");
}
/**
* \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);
}
void init_adc(void)
{
struct afec_config afec_cfg;
struct afec_ch_config afec_ch_cfg;
afec_enable(AFEC0);
afec_enable(AFEC1);
afec_get_config_defaults(&afec_cfg);
afec_cfg.resolution = AFEC_12_BITS;
afec_init(AFEC0, &afec_cfg);
afec_init(AFEC1, &afec_cfg);
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_ch_cfg.gain = AFEC_GAINVALUE_3;
afec_ch_set_config(AFEC1, AFEC_CHANNEL_9, &afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_CHANNEL_4, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_4, &afec_ch_cfg);
afec_ch_set_config(AFEC1, AFEC_CHANNEL_5, &afec_ch_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
afec_set_trigger(AFEC1, AFEC_TRIG_SW);
afec_set_callback(AFEC0, AFEC_INTERRUPT_DATA_READY, afec0_data_ready, 1);
afec_set_callback(AFEC1, AFEC_INTERRUPT_DATA_READY, afec1_data_ready, 1);
// Got this calibration code from a SAM4E example, supposedly code compatible with the SAME70, but this doesn't build
// 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);
}
/*
* Inialise the temp sensor
*
*/
void temp_init(void)
{
afec_enable(AFEC0);
struct afec_config afec_cfg;
afec_get_config_defaults(&afec_cfg);
afec_init(AFEC0, &afec_cfg);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
struct afec_ch_config afec_ch_cfg;
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_ch_set_config(AFEC0, AFEC_TEMPERATURE_SENSOR, &afec_ch_cfg);
afec_channel_set_analog_offset(AFEC0, AFEC_TEMPERATURE_SENSOR, 0x800);
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);
afec_set_callback(AFEC0, AFEC_INTERRUPT_EOC_15, afec_temp_sensor_end_conversion, 1);
}
/**
* \brief ACC example application entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint32_t uc_key;
int16_t s_volt = 0;
uint32_t ul_value = 0;
volatile uint32_t ul_status = 0x0;
int32_t l_volt_dac0 = 0;
/* Initialize the system */
sysclk_init();
board_init();
/* Initialize debug console */
configure_console();
/* Output example information */
puts(STRING_HEADER);
/* Initialize DACC */
/* Enable clock for DACC */
pmc_enable_periph_clk(ID_DACC);
/* Reset DACC registers */
dacc_reset(DACC);
/* External trigger mode disabled. DACC in free running mode. */
dacc_disable_trigger(DACC, DACC_CHANNEL_0);
/* Half word transfer mode */
dacc_set_transfer_mode(DACC, 0);
#if (SAM3S) || (SAM3XA)
/* Power save:
* sleep mode - 0 (disabled)
* fast wakeup - 0 (disabled)
*/
dacc_set_power_save(DACC, 0, 0);
#endif
/* Enable output channel DACC_CHANNEL */
dacc_enable_channel(DACC, DACC_CHANNEL_0);
/* Setup analog current */
dacc_set_analog_control(DACC, DACC_ANALOG_CONTROL);
/* Set DAC0 output at ADVREF/2. The DAC formula is:
*
* (5/6 * VOLT_REF) - (1/6 * VOLT_REF) volt - (1/6 * VOLT_REF)
* ----------------------------------- = --------------------------
* MAX_DIGITAL digit
*
* Here, digit = MAX_DIGITAL/2
*/
dacc_write_conversion_data(DACC, MAX_DIGITAL / 2, DACC_CHANNEL_0);
l_volt_dac0 = (MAX_DIGITAL / 2) * (2 * VOLT_REF / 3) / MAX_DIGITAL +
VOLT_REF / 6;
/* Enable clock for AFEC */
afec_enable(AFEC0);
struct afec_config afec_cfg;
afec_get_config_defaults(&afec_cfg);
/* Initialize AFEC */
afec_init(AFEC0, &afec_cfg);
struct afec_ch_config afec_ch_cfg;
afec_ch_get_config_defaults(&afec_ch_cfg);
afec_ch_cfg.gain = AFEC_GAINVALUE_0;
afec_ch_set_config(AFEC0, AFEC_CHANNEL_POTENTIOMETER, &afec_ch_cfg);
/*
* Because the internal ADC offset is 0x200, it should cancel it and shift
* down to 0.
*/
afec_channel_set_analog_offset(AFEC0, AFEC_CHANNEL_POTENTIOMETER, 0x200);
afec_set_trigger(AFEC0, AFEC_TRIG_SW);
/* Enable channel for potentiometer. */
afec_channel_enable(AFEC0, AFEC_CHANNEL_POTENTIOMETER);
/* Enable clock for ACC */
pmc_enable_periph_clk(ID_ACC);
/* Initialize ACC */
acc_init(ACC, ACC_MR_SELPLUS_AFE0_AD0, ACC_MR_SELMINUS_DAC0,
ACC_MR_EDGETYP_ANY, ACC_MR_INV_DIS);
/* Enable ACC interrupt */
NVIC_EnableIRQ(ACC_IRQn);
/* Enable */
acc_enable_interrupt(ACC);
dsplay_menu();
while (1) {
while (usart_read(CONSOLE_UART, &uc_key)) {
}
printf("input: %c\r\n", uc_key);
switch (uc_key) {
case 's':
case 'S':
printf("Input DAC0 output voltage (%d~%d mv): ",
(VOLT_REF / 6), (VOLT_REF * 5 / 6));
s_volt = get_input_voltage();
puts("\r");
if (s_volt > 0) {
l_volt_dac0 = s_volt;
/* The DAC formula is:
*
* (5/6 * VOLT_REF) - (1/6 * VOLT_REF) volt - (1/6 * VOLT_REF)
* ----------------------------------- = --------------------------
* MAX_DIGITAL digit
*
*/
ul_value = ((s_volt - (VOLT_REF / 6))
* (MAX_DIGITAL * 6) / 4) / VOLT_REF;
dacc_write_conversion_data(DACC, ul_value, DACC_CHANNEL_0);
puts("-I- Set ok\r");
} else {
puts("-I- Input voltage is invalid\r");
}
break;
case 'v':
case 'V':
/* Start conversion */
afec_start_software_conversion(AFEC0);
ul_status = afec_get_interrupt_status(AFEC0);
while ((ul_status & AFEC_ISR_EOC0) != AFEC_ISR_EOC0) {
ul_status = afec_get_interrupt_status(AFEC0);
}
/* Conversion is done */
ul_value = afec_channel_get_value(AFEC0, AFEC_CHANNEL_POTENTIOMETER);
/*
* Convert AFEC sample data to voltage value:
* voltage value = (sample data / max. resolution) * reference voltage
*/
s_volt = (ul_value * VOLT_REF) / MAX_DIGITAL;
printf("-I- Voltage on potentiometer(AD0) is %d mv\n\r", s_volt);
printf("-I- Voltage on DAC0 is %ld mv \n\r", (long)l_volt_dac0);
break;
case 'm':
case 'M':
dsplay_menu();
break;
}
}
}
/**
* \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);
}
}
}
/**
* \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;
}
}