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428 lines
15 KiB
428 lines
15 KiB
//
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// Created by MightyPork on 2017/11/25.
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//
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#include "unit_base.h"
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#include "unit_adc.h"
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#define ADC_INTERNAL
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#include "_adc_internal.h"
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// ------------------------------------------------------------------------
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enum AdcCmd_ {
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CMD_READ_RAW = 0,
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CMD_READ_SMOOTHED = 1,
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CMD_READ_CAL_CONSTANTS = 2,
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CMD_GET_ENABLED_CHANNELS = 10,
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CMD_GET_SAMPLE_RATE = 11,
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CMD_SETUP_TRIGGER = 20,
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CMD_ARM = 21,
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CMD_DISARM = 22,
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CMD_ABORT = 23, // abort any ongoing capture or stream
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CMD_FORCE_TRIGGER = 24,
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CMD_BLOCK_CAPTURE = 25,
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CMD_STREAM_START = 26,
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CMD_STREAM_STOP = 27,
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CMD_SET_SMOOTHING_FACTOR = 28,
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CMD_SET_SAMPLE_RATE = 29,
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CMD_ENABLE_CHANNELS = 30,
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CMD_SET_SAMPLE_TIME = 31,
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};
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/** Handle a request message */
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static error_t UADC_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, PayloadParser *pp)
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{
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struct priv *priv = unit->data;
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PayloadBuilder pb = pb_start(unit_tmp512, UNIT_TMP_LEN, NULL);
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switch (command) {
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/**
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* Get enabled channels.
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* Response: bytes with indices of enabled channels, ascending order.
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*/
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case CMD_GET_ENABLED_CHANNELS:
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for (uint8_t i = 0; i < 18; i++) {
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if (priv->channels_mask & (1 << i)) {
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pb_u8(&pb, i);
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}
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}
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com_respond_pb(frame_id, MSG_SUCCESS, &pb);
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return E_SUCCESS;
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/**
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* Set the sample rate in Hz
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* plad: hz:u32
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*/
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case CMD_SET_SAMPLE_RATE:
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{
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uint32_t freq = pp_u32(pp);
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if (freq == 0) return E_BAD_VALUE;
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TRY(UADC_SetSampleRate(unit, freq));
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}
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// Pass through - send back the obtained sample rate
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/**
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* Read the real used frequency, expressed as float.
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* May differ from the configured or requested value due to prescaller limitations.
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*/
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case CMD_GET_SAMPLE_RATE:
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pb_u32(&pb, priv->real_frequency_int);
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pb_float(&pb, priv->real_frequency);
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com_respond_pb(frame_id, MSG_SUCCESS, &pb);
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return E_SUCCESS;
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/**
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* Set smoothing factor 0-1000.
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* pld: u16:factor
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*/
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case CMD_SET_SMOOTHING_FACTOR:
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{
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uint16_t fac = pp_u16(pp);
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if (fac > 1000) return E_BAD_VALUE;
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priv->avg_factor_as_float = fac / 1000.0f;
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}
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return E_SUCCESS;
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/**
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* Set sample time
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* pld: u8:0-7
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*/
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case CMD_SET_SAMPLE_TIME:
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{
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uint8_t tim = pp_u8(pp);
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if (tim > 7) return E_BAD_VALUE;
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UADC_SwitchMode(unit, ADC_OPMODE_UNINIT);
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{
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LL_ADC_SetSamplingTimeCommonChannels(priv->ADCx, LL_ADC_SAMPLETIMES[tim]);
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}
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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}
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return E_SUCCESS;
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/** Read ADC calibration constants */
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case CMD_READ_CAL_CONSTANTS:
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{
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pb_u16(&pb, *VREFINT_CAL_ADDR); // VREFINT_CAL
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pb_u16(&pb, VREFINT_CAL_VREF); // Vref pin voltage during calibration (usually bonded to Vdd)
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pb_u16(&pb, *TEMPSENSOR_CAL1_ADDR); // TEMPSENSOR_CAL1
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pb_u16(&pb, *TEMPSENSOR_CAL2_ADDR); // TEMPSENSOR_CAL2
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pb_u8(&pb, TEMPSENSOR_CAL1_TEMP); // temperature for CAL1
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pb_u8(&pb, TEMPSENSOR_CAL2_TEMP); // temperature for CAL2
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pb_u16(&pb, TEMPSENSOR_CAL_VREFANALOG); // VREFINT_CAL_VREF - Vref pin voltage during calibration (usually bonded to Vdd)
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com_respond_pb(frame_id, MSG_SUCCESS, &pb);
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}
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return E_SUCCESS;
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/**
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* Enable channels. The channels must've been configured in the settings (except ch 16 and 17 which are available always)
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* pld: u32: bitmap of channels
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*/
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case CMD_ENABLE_CHANNELS:
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{
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uint32_t new_channels = pp_u32(pp);
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// this tears down the peripherals sufficiently so we can re-configure them. Going back to IDLE re-inits this
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UADC_SwitchMode(unit, ADC_OPMODE_UNINIT);
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uint32_t illegal_channels = new_channels & ~(priv->cfg.channels | (1<<16) | (1<<17)); // 16 and 17 may be enabled always
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if (illegal_channels != 0) {
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com_respond_str(MSG_ERROR, frame_id, "Some requested channels not available");
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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return E_FAILURE;
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}
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uint8_t nb_channels = 0;
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// count the enabled channels
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for(int i = 0; i < 32; i++) {
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if (new_channels & (1<<i)) {
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priv->channel_nums[nb_channels] = (uint8_t) i;
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nb_channels++;
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}
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}
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if (nb_channels == 0) {
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com_respond_str(MSG_ERROR, frame_id, "Need at least 1 channel");
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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return E_FAILURE;
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}
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if (priv->cfg.buffer_size < nb_channels * 2) {
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com_respond_str(MSG_ERROR, frame_id, "Insufficient buf size");
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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return E_BAD_CONFIG;
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}
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priv->nb_channels = nb_channels;
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priv->ADCx->CHSELR = new_channels; // apply it to the ADC
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priv->channels_mask = new_channels;
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UADC_SetupDMA(unit);
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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}
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return E_SUCCESS;
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/**
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* Read raw values from the last measurement.
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* Response: interleaved (u8:channel, u16:value) for all channels
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*/
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case CMD_READ_RAW:
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if(priv->opmode != ADC_OPMODE_IDLE && priv->opmode != ADC_OPMODE_ARMED) {
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return E_BUSY;
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}
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for (uint8_t i = 0; i < 18; i++) {
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if (priv->channels_mask & (1 << i)) {
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pb_u16(&pb, priv->last_samples[i]);
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}
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}
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com_respond_pb(frame_id, MSG_SUCCESS, &pb);
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return E_SUCCESS;
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/**
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* Read smoothed values.
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* Response: interleaved (u8:channel, f32:value) for all channels
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*/
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case CMD_READ_SMOOTHED:
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if(priv->opmode != ADC_OPMODE_IDLE && priv->opmode != ADC_OPMODE_ARMED) {
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return E_BUSY;
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}
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if (! priv->cfg.enable_averaging) {
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com_respond_str(MSG_ERROR, frame_id, "Averaging disabled");
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return E_FAILURE;
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}
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if (priv->real_frequency_int > UADC_MAX_FREQ_FOR_AVERAGING) {
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com_respond_str(MSG_ERROR, frame_id, "Too fast for averaging");
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return E_FAILURE;
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}
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for (uint8_t i = 0; i < 18; i++) {
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if (priv->channels_mask & (1 << i)) {
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pb_float(&pb, priv->averaging_bins[i]);
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}
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}
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com_respond_pb(frame_id, MSG_SUCCESS, &pb);
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return E_SUCCESS;
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/**
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* Configure a trigger. This is legal only if the current state is IDLE or ARMED (will re-arm).
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*
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* Payload:
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* u8 - source channel
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* u16 - triggering level
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* u8 - edge to trigger on: 1-rising, 2-falling, 3-both
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* u16 - pre-trigger samples count
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* u32 - post-trigger samples count
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* u16 - trigger hold-off in ms (dead time after firing, before it cna fire again if armed)
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* u8(bool) - auto re-arm after firing and completing the capture
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*/
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case CMD_SETUP_TRIGGER:
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adc_dbg("> Setup trigger");
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if (priv->opmode != ADC_OPMODE_IDLE &&
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priv->opmode != ADC_OPMODE_ARMED &&
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priv->opmode != ADC_OPMODE_REARM_PENDING) {
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return E_BUSY;
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}
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{
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const uint8_t source = pp_u8(pp);
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const uint16_t level = pp_u16(pp);
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const uint8_t edge = pp_u8(pp);
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const uint32_t pretrig = pp_u32(pp);
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const uint32_t count = pp_u32(pp);
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const uint16_t holdoff = pp_u16(pp);
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const bool auto_rearm = pp_bool(pp);
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if (source > UADC_MAX_CHANNEL) {
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com_respond_str(MSG_ERROR, frame_id, "Invalid trig source");
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return E_FAILURE;
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}
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if (0 == (priv->channels_mask & (1 << source))) {
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com_respond_str(MSG_ERROR, frame_id, "Channel not enabled");
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return E_FAILURE;
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}
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if (level > 4095) {
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com_respond_str(MSG_ERROR, frame_id, "Level out of range (0-4095)");
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return E_FAILURE;
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}
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if (edge == 0 || edge > 3) {
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com_respond_str(MSG_ERROR, frame_id, "Bad edge");
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return E_FAILURE;
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}
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// XXX the max size may be too much
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const uint32_t max_pretrig = (priv->buf_itemcount / priv->nb_channels);
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if (pretrig > max_pretrig) {
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com_respond_snprintf(frame_id, MSG_ERROR,
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"Pretrig too large (max %d)", (int) max_pretrig);
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return E_FAILURE;
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}
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priv->trigger_source = source;
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priv->trig_level = level;
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priv->trig_prev_level = priv->last_samples[source];
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priv->trig_edge = edge;
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priv->pretrig_len = pretrig;
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priv->trig_len = count;
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priv->trig_holdoff = holdoff;
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priv->auto_rearm = auto_rearm;
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}
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return E_SUCCESS;
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/**
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* Arm (permissible only if idle and the trigger is configured)
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*/
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case CMD_ARM:
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adc_dbg("> Arm");
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uint8_t sticky = pp_u8(pp);
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if(priv->opmode == ADC_OPMODE_ARMED || priv->opmode == ADC_OPMODE_REARM_PENDING) {
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// We are armed or will re-arm promptly, act like the call succeeded
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// The auto flag is set regardless
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} else {
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if (priv->opmode != ADC_OPMODE_IDLE) {
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return E_BUSY; // capture in progress
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}
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if (priv->trig_len == 0) {
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com_respond_str(MSG_ERROR, frame_id, "Trigger not configured.");
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return E_FAILURE;
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}
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UADC_SwitchMode(unit, ADC_OPMODE_ARMED);
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}
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if (sticky != 255) {
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priv->auto_rearm = (bool)sticky;
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}
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return E_SUCCESS;
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/**
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* Dis-arm. Permissible only when idle or armed.
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* Switches to idle.
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*/
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case CMD_DISARM:
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adc_dbg("> Disarm");
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priv->auto_rearm = false;
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if(priv->opmode == ADC_OPMODE_IDLE) {
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return E_SUCCESS; // already idle, success - no work to do
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}
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// capture in progress
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if (priv->opmode != ADC_OPMODE_ARMED &&
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priv->opmode != ADC_OPMODE_REARM_PENDING) {
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// Capture in progress, we already cleared auto rearm, so we're done for now
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// auto_rearm is checked in the EOS isr and if cleared, does not re-arm.
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return E_SUCCESS;
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}
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UADC_SwitchMode(unit, ADC_OPMODE_IDLE);
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return E_SUCCESS;
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/**
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* Abort any ongoing capture and dis-arm.
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*/
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case CMD_ABORT:;
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adc_dbg("> Abort capture");
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UADC_AbortCapture(unit);
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return E_SUCCESS;
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/**
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* Force a trigger (complete with pre-trigger capture and hold-off)
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* The reported edge will be 0b11, here meaning "manual trigger"
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*/
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case CMD_FORCE_TRIGGER:
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adc_dbg("> Force trigger");
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// This is similar to block capture, but includes the pre-trig buffer and has fixed size based on trigger config
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// FORCE is useful for checking if the trigger is set up correctly
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if (priv->opmode != ADC_OPMODE_ARMED &&
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priv->opmode != ADC_OPMODE_IDLE &&
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priv->opmode != ADC_OPMODE_REARM_PENDING) return E_BUSY;
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if (priv->trig_len == 0) {
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com_respond_str(MSG_ERROR, frame_id, "Trigger not configured.");
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return E_FAILURE;
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}
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UADC_HandleTrigger(unit, 0b11, PTIM_GetMicrotime());
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return E_SUCCESS;
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/**
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* Start a block capture (like manual trigger, but without pre-trigger and arming)
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*
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* Payload:
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* u32 - sample count (for each channel)
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*/
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case CMD_BLOCK_CAPTURE:
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adc_dbg("> Block cpt");
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if (priv->opmode != ADC_OPMODE_ARMED &&
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priv->opmode != ADC_OPMODE_REARM_PENDING &&
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priv->opmode != ADC_OPMODE_IDLE) return E_BUSY;
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uint32_t count = pp_u32(pp);
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UADC_StartBlockCapture(unit, count, frame_id);
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return E_SUCCESS;
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/**
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* Start streaming (like block capture, but unlimited)
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* The stream can be terminated by the stop command.
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*/
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case CMD_STREAM_START:
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adc_dbg("> Stream ON");
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if (priv->opmode != ADC_OPMODE_ARMED &&
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priv->opmode != ADC_OPMODE_REARM_PENDING &&
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priv->opmode != ADC_OPMODE_IDLE) return E_BUSY;
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UADC_StartStream(unit, frame_id);
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return E_SUCCESS;
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/**
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* Stop a stream.
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*/
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case CMD_STREAM_STOP:
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adc_dbg("> Stream OFF");
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if (priv->opmode != ADC_OPMODE_STREAM) {
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com_respond_str(MSG_ERROR, frame_id, "Not streaming");
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return E_FAILURE;
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}
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UADC_StopStream(unit);
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return E_SUCCESS;
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default:
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return E_UNKNOWN_COMMAND;
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}
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}
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// ------------------------------------------------------------------------
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/** Unit template */
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const UnitDriver UNIT_ADC = {
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.name = "ADC",
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.description = "Analog/digital converter",
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// Settings
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.preInit = UADC_preInit,
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.cfgLoadBinary = UADC_loadBinary,
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.cfgWriteBinary = UADC_writeBinary,
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.cfgLoadIni = UADC_loadIni,
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.cfgWriteIni = UADC_writeIni,
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// Init
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.init = UADC_init,
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.deInit = UADC_deInit,
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// Function
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.handleRequest = UADC_handleRequest,
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.updateTick = UADC_updateTick,
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};
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