save some implementation

main/hw/mcp3550.h

@@ -0,0 +1,38 @@
+#ifndef MPC3550_COMPONENT
+#define MPC3550_COMPONENT
+
+#include "driver/spi_master.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "buscfg.h"
+
+#define CONFIG_FREERTOS_HZ 100
+
+#define MCP3550_SPS 3.75f
+#define MCP3550_CONVERSION_MS ((int)(1000.0f / MCP3550_SPS)) // ~267ms
+
+
+extern spi_device_handle_t mcp3550_handle;
+
+void mcp3550_spi_init();
+int32_t mcp3550_read(uint8_t cs_pin);
+float mcp3550_to_voltage(int32_t value, float vref);
+
+typedef struct {
+    int32_t raw_nh3;
+    int32_t raw_co;
+    int32_t raw_no2;
+    int32_t raw_uvc;
+    float volts_nh3;
+    float volts_co;
+    float volts_no2;
+    float volts_uvc;
+} mics_adc_data_t;
+
+extern spi_device_handle_t mcp3550_handle;
+
+void log_mics_adc_values(mics_adc_data_t *data);
+mics_adc_data_t mcp3550_read_all(float vref);
+
+#endif