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112 lines
2.7 KiB
112 lines
2.7 KiB
6 years ago
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// Created by MightyPork on 2018/02/03.
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//
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#ifndef GEX_F072_DAC_INTERNAL_H
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#define GEX_F072_DAC_INTERNAL_H
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#ifndef DAC_INTERNAL
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#error bad include!
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#endif
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#include "unit_base.h"
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enum UDAC_Noise {
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NOISE_NONE = 0b00, // 0
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NOISE_WHITE = 0b01, // 1
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NOISE_TRIANGLE = 0b10, // 2
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};
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enum UDAC_Waveform {
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UDAC_WAVE_DC,
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UDAC_WAVE_SINE,
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UDAC_WAVE_TRIANGLE,
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UDAC_WAVE_SAWTOOTH_UP,
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UDAC_WAVE_SAWTOOTH_DOWN,
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UDAC_WAVE_RECTANGLE,
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};
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struct udac_channel_cfg {
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bool enable;
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bool buffered;
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enum UDAC_Noise noise_type;
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uint8_t noise_level; // 0-11
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};
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// 0 - 1 MHz, 2-500k, 4-250k, 8-125k
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#define UDAC_TIM_FREQ_DIVIDER 8
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#define UDAC_INDEX_WIDTH 13 // corresponds to 8192 places
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#define UDAC_INDEX_SHIFT (32 - UDAC_INDEX_WIDTH)
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#define UDAC_MAX_INDEX ((1 << UDAC_INDEX_WIDTH) - 1)
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#define UDAC_VALUE_COUNT (1 << UDAC_INDEX_WIDTH)
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extern const uint8_t LUT_sine_8192_quad_packed[];
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struct udac_channel_live {
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enum UDAC_Noise noise_type;
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uint8_t noise_level; // 0-11
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enum UDAC_Waveform waveform;
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uint16_t rectangle_ontime; // for rectangle wave, 0-8191
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uint16_t rectangle_high;
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uint16_t rectangle_low;
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uint16_t dc_level; // for DC wave
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uint32_t counter;
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uint32_t increment;
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// last set phase if the frequencies are the same
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// - can be used for live frequency changes without reset (meaningful only with matching increment values)
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uint16_t phase;
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uint16_t last_index;
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uint16_t last_value;
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};
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/** Private data structure */
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struct priv {
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// settings
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struct {
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struct udac_channel_cfg ch[2];
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} cfg;
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// internal state
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struct udac_channel_live ch[2];
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TIM_TypeDef *TIMx; // timer used for the DDS function
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};
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/** Allocate data structure and set defaults */
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error_t UDAC_preInit(Unit *unit);
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/** Load from a binary buffer stored in Flash */
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void UDAC_loadBinary(Unit *unit, PayloadParser *pp);
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/** Write to a binary buffer for storing in Flash */
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void UDAC_writeBinary(Unit *unit, PayloadBuilder *pb);
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// ------------------------------------------------------------------------
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/** Parse a key-value pair from the INI file */
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error_t UDAC_loadIni(Unit *unit, const char *key, const char *value);
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/** Generate INI file section for the unit */
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void UDAC_writeIni(Unit *unit, IniWriter *iw);
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// ------------------------------------------------------------------------
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/** Finalize unit set-up */
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error_t UDAC_init(Unit *unit);
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/** Tear down the unit */
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void UDAC_deInit(Unit *unit);
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void UDAC_Reconfigure(Unit *unit);
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void UDAC_HandleIT(void *arg);
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error_t UDAC_SetFreq(Unit *unit, int channel, float freq);
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void UDAC_ToggleTimerIfNeeded(Unit *unit);
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#endif //GEX_F072_DAC_INTERNAL_H
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