firmware/edu16_sbc
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This commit is contained in:
ThePetrovich 2026-05-07 23:21:11 +08:00
parent 70798b6bf7
commit 3e77d34ccc
10 changed files with 669 additions and 146 deletions
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70
sbc_fw/config.h
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@ -20,36 +20,23 @@
// Serial communication
#define SERIAL_BAUD_RATE 38400
#define SERIAL_BUFFER_CLEAR() \
do { \
while (Serial.available()) { \
Serial.read(); \
} \
} while (0)
#define SERIAL_SEND_OK() \
do { \
Serial.print("ok\n"); \
Serial.flush(); \
SERIAL_BUFFER_CLEAR(); \
} while (0)
// Timing constants
#define STATUS_LED_BLINK_PERIOD 500U
#define MAIN_LOOP_DELAY 10
#define CPM_UPDATE_PERIOD 10000U
// ADC and detector settings
#define ADC_OVERSAMPLING_BITS 2 // 16x oversampling -> 2 extra bits
#define ADC_CHANNEL_16_MASK 0x7FFU // 11-bit channel mask
#define ADC_CHANNEL_32_MASK 0x3FFU // 10-bit channel mask
#define DETECTOR_CHANNEL_COUNT 2048
#define DETECTOR_CHANNEL_32_COUNT 1024
#define RSENSE_CHANNEL_16_MASK 0x7FFU // 11-bit channel mask
#define RSENSE_CHANNEL_32_MASK 0x3FFU // 10-bit channel mask
#define RSENSE_CHANNEL_COUNT 2048
#define RSENSE_CHANNEL_32_COUNT 1024
// Temperature sensor constants (MCP9700)
#define TEMP_SENSOR_OFFSET_MV 500L // 500 mV at 0°C
#define TEMP_SENSOR_SCALE_MV 10L // 10 mV per degree
#define ADC_VREF_MV 3000L // 3.0V reference
#define ADC_RESOLUTION 4096L // 12-bit effective resolution
#define MCP9700_OFFSET_MV 500L // 500 mV at 0°C
#define MCP9700_SCALE_MV 10L // 10 mV per degree
#define ADC_OVERSAMPLING_BITS 2 // 16x oversampling -> 2 extra bits
#define ADC_VREF_MV 3000L // 3.0V reference
#define ADC_RESOLUTION 1024L // 10-bit ADC
// Voltage divider constants
#define VOLTAGE_DIVIDER_RATIO 20.0f // 200k and 10k resistors
@ -70,4 +57,43 @@
#define LSENSE_EXPECTED_ID 0xE0
#define LSENSE_DATA_SIZE 12
typedef struct config_t {
uint8_t magic1; // 0xA5 to indicate valid config
uint8_t magic2; // 0x5A to indicate valid config
uint8_t pot_hv;
uint8_t pot_amp;
uint8_t pot_det;
struct {
uint16_t adccal0; // ADC offset at GND
uint16_t adccal3; // ADC reading at 3.0V reference
uint16_t tempcal;
uint16_t tempdrift_mvK; // SiPM temperature drift compensation in mV/K, normally around 20 mV/K
float gainlow; // gain value for pot_amp = 0
float gainhigh; // gain value for pot_amp = 255
} calibration __attribute__((packed));
union {
struct {
uint8_t spectrum_oversample_bits
: 2; // 0, 1, 2, or 3 for 1x, 4x, 16x, or 64x oversampling, only for spectrum measurement
uint8_t spectrum_channel_bits : 1; // 0 for 16-bit channels, 1 for 32-bit channels
uint8_t temperature_drift_compensation
: 1; // 0 to disable, 1 to enable temperature compensation
uint8_t adc_oversample_bits : 2; // 0, 1, 2, or 3 for 1x, 4x, 16x, or 64x ADC oversampling for
// temperature and voltage measurements
uint8_t reserved : 2;
} fields __attribute__((packed));
uint8_t value;
} flags __attribute__((packed));
struct {
uint8_t tempdrift_pot_hv_low;
uint8_t tempdrift_pot_hv_high;
uint8_t tempdrift_pot_amp_low;
uint8_t tempdrift_pot_amp_high;
uint8_t tempdrift_pot_det_low;
uint8_t tempdrift_pot_det_high;
} temp_drift_compensation_ranges __attribute__((packed));
} __attribute__((packed)) config_t;
extern config_t config;
#endif // CONFIG_H