groundwork for BMS

include/max17048.h

@@ -0,0 +1,38 @@
+#ifndef MAX_17_H
+#define MAX_17_H
+
+#define MAX17048_ADDR           0x36
+#define MAX17048_REG_VCELL      0x02 // Voltage
+#define MAX17048_REG_SOC        0x04 // State of Charge (%)
+#define MAX17048_REG_MODE       0x06
+#define MAX17048_REG_VERSION    0x08
+#define MAX17048_REG_CONFIG     0x0C
+#define MAX17048_REG_CMD        0xFE // Command (Reset)
+#define MAX17048_REG_STATUS     0x1A
+#define MAX17048_REG_VALRT      0x14
+#define MAX17048_REG_VRST_ID    0x18
+
+// Commands
+#define MAX17048_CMD_POR        0x5400 // Power On Reset command
+#define MAX17048_CMD_QSTRT      0x4000 // Quick Start command
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "driver/i2c.h"
+
+esp_err_t max17048_init();
+uint8_t bms_get_soc();
+esp_err_t bms_set_alert_bound_voltages(float min, float max);
+esp_err_t bms_set_reset_voltage(float vreset);
+esp_err_t bms_clear_status();
+
+#define bms_set_alsc() max17048_friendly_write_reg(MAX17048_REG_CONFIG, 0, 1<<6, 0, 1<<6)
+#define bms_clear_status() max17048_write_reg(MAX17048_REG_STATUS, 0, 0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif