mirror of https://github.com/rusefi/wideband.git
84 lines
1.6 KiB
C++
84 lines
1.6 KiB
C++
#include "pump_dac.h"
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#include "pwm.h"
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#include "heater_control.h"
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#include "wideband_config.h"
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#include "hal.h"
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// 48MHz / 1024 = 46.8khz PWM
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static const PWMConfig pumpDacConfig = {
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48'000'000,
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1024,
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nullptr,
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{
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{PWM_OUTPUT_ACTIVE_HIGH, nullptr},
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{PWM_OUTPUT_ACTIVE_HIGH, nullptr},
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{PWM_OUTPUT_ACTIVE_HIGH, nullptr},
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{PWM_OUTPUT_ACTIVE_HIGH, nullptr}
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},
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0,
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0,
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#if STM32_PWM_USE_ADVANCED
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0
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#endif
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};
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static Pwm pumpDac(PUMP_DAC_PWM_DEVICE);
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struct pump_dac_state {
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int32_t curIpump;
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};
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static const uint8_t pumpDacPwmCh[] = {
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PUMP_DAC_PWM_CHANNEL_0,
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#if (AFR_CHANNELS > 1)
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PUMP_DAC_PWM_CHANNEL_1,
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#endif
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};
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static struct pump_dac_state state[AFR_CHANNELS];
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void InitPumpDac()
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{
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pumpDac.Start(pumpDacConfig);
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for (int ch = 0; ch < AFR_CHANNELS; ch++)
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{
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// Set zero current to start - sensor can be damaged if current flowing
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// while warming up
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SetPumpCurrentTarget(ch, 0);
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}
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}
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void SetPumpCurrentTarget(int ch, int32_t microampere)
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{
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// Don't allow pump current when the sensor isn't hot
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if (!IsRunningClosedLoop(ch))
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{
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microampere = 0;
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}
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state[ch].curIpump = microampere;
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// 47 ohm resistor
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// 0.147 gain
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// effective resistance of 317 ohms
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float volts = -0.000321162f * microampere;
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// offset by half vcc
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volts += HALF_VCC;
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pumpDac.SetDuty(pumpDacPwmCh[ch], volts / VCC_VOLTS);
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}
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float GetPumpOutputDuty(int ch)
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{
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return pumpDac.GetLastDuty(ch);
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}
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float GetPumpCurrent(int ch)
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{
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return (float)state[ch].curIpump / 1000.0;
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}
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