#define LOG_PREFIX "itech-it8500"
+/*
+ * Unit uses 26 byte binary packets for communications.
+ * Packets have fixed format:
+ *
+ * Offset|Length|Description
+ * ------|------|-------------------------------------
+ * 0 | 1 | Preable (always set to 0xAA).
+ * 1 | 1 | Unit Address (0-254, 255=broadcast).
+ * 2 | 1 | Command number.
+ * 3 | 22 | Variable data.
+ * 25 | 1 | Parity code (checksum).
+ */
+#define IT8500_HEADER_LEN 3
+#define IT8500_DATA_LEN 22
+#define IT8500_PACKET_LEN (IT8500_HEADER_LEN + IT8500_DATA_LEN + 1)
+
+#define IT8500_PREAMBLE 0xaa
+#define IT8500_MAX_MODEL_NAME_LEN 5
+
+/* Status packet status byte values. */
+#define IT8500_COMMAND_SUCCESSFUL 0x80
+#define IT8500_INVALID_CHECKSUM 0x90
+#define IT8500_INVALID_PARAMETER 0xa0
+#define IT8500_UNKNOWN_COMMAND 0xb0
+#define IT8500_INVALID_COMMAND 0xc0
+
+/*
+ * Operating modes.
+ * Note! These map directly to mode numbers used in CMD_SET_MODE
+ * and CMD_GET_MODE commands, so values are manually defined below.
+ */
+enum itech_it8500_modes {
+ CC = 0,
+ CV = 1,
+ CW = 2,
+ CR = 3,
+ IT8500_MODES, /* Total count, for internal use. */
+};
+
+enum itech_it8500_command {
+ CMD_GET_LOAD_LIMITS = 0x01,
+ CMD_SET_HW_OPP_VALUE = 0x02,
+ CMD_GET_HW_OPP_VALUE = 0x03,
+ CMD_SET_VON_MODE = 0x0e,
+ CMD_GET_VON_MODE = 0x0f,
+ CMD_SET_VON_VALUE = 0x10,
+ CMD_GET_VON_VALUE = 0x11,
+ CMD_RESPONSE = 0x12, /* Response to commands not returning any data. */
+ CMD_SET_REMOTE_MODE = 0x20,
+ CMD_LOAD_ON_OFF = 0x21,
+ CMD_SET_MAX_VOLTAGE = 0x22,
+ CMD_GET_MAX_VOLTAGE = 0x23,
+ CMD_SET_MAX_CURRENT = 0x24,
+ CMD_GET_MAX_CURRENT = 0x25,
+ CMD_SET_MAX_POWER = 0x26,
+ CMD_GET_MAX_POWER = 0x27,
+ CMD_SET_MODE = 0x28,
+ CMD_GET_MODE = 0x29,
+ CMD_SET_CC_CURRENT = 0x2a,
+ CMD_GET_CC_CURRENT = 0x2b,
+ CMD_SET_CV_VOLTAGE = 0x2c,
+ CMD_GET_CV_VOLTAGE = 0x2d,
+ CMD_SET_CW_POWER = 0x2e,
+ CMD_GET_CW_POWER = 0x2f,
+ CMD_SET_CR_RESISTANCE = 0x30,
+ CMD_GET_CR_RESISTANCE = 0x31,
+ CMD_SET_BATTERY_MIN_VOLTAGE = 0x4e,
+ CMD_GET_BATTERY_MIN_VOLTAGE = 0x4f,
+ CMD_SET_LOAD_ON_TIMER = 0x50,
+ CMD_GET_LOAD_ON_TIMER = 0x51,
+ CMD_LOAD_ON_TIMER = 0x52,
+ CMD_LOAD_ON_TIME_STATUS = 0x53,
+ CMD_SET_ADDRESS = 0x54,
+ CMD_LOCAL_CONTROL = 0x55,
+ CMD_REMOTE_SENSING = 0x56,
+ CMD_REMOTE_SENSING_STATUS = 0x57,
+ CMD_SET_TRIGGER_SOURCE = 0x58,
+ CMD_GET_TRIGGER_SOURCE = 0x59,
+ CMD_TRIGGER = 0x5a,
+ CMD_SAVE_SETTINGS = 0x5b,
+ CMD_LOAD_SETTINGS = 0x5c,
+ CMD_SET_FUNCTION = 0x5d,
+ CMD_GET_FUNCTION = 0x5e,
+ CMD_GET_STATE = 0x5f,
+ CMD_GET_MODEL_INFO = 0x6a,
+ CMD_GET_BARCODE_INFO = 0x6b,
+ CMD_SET_OCP_VALUE = 0x80,
+ CMD_GET_OCP_VALUE = 0x81,
+ CMD_SET_OCP_DELAY = 0x82,
+ CMD_GET_OCP_DELAY = 0x83,
+ CMD_ENABLE_OCP = 0x84,
+ CMD_DISABLE_OCP = 0x85,
+ CMD_SET_OPP_VALUE = 0x86,
+ CMD_GET_OPP_VALUE = 0x87,
+ CMD_SET_OPP_DELAY = 0x88,
+ CMD_GET_OPP_DELAY = 0x89,
+};
+
+/*
+ * Data structure to track commands and reponses.
+ */
+struct itech_it8500_cmd_packet {
+ uint8_t command; /* Command number. */
+ uint8_t address; /* Unit address: 0..254 (255 = broadcast). */
+ uint8_t data[IT8500_DATA_LEN]; /* Command/Response data. */
+};
+
+/*
+ * "Operation state" register flags.
+ */
+#define OS_CAL_FLAG 0x01
+#define OS_WTG_FLAG 0x02
+#define OS_REM_FLAG 0x04
+#define OS_OUT_FLAG 0x08
+#define OS_LOCAL_FLAG 0x10
+#define OS_SENSE_FLAG 0x20
+#define OS_LOT_FLAG 0x40
+
+/*
+ * "Demand state" register flags.
+ */
+#define DS_RV_FLAG 0x0001
+#define DS_OV_FLAG 0x0002
+#define DS_OC_FLAG 0x0004
+#define DS_OP_FLAG 0x0008
+#define DS_OT_FLAG 0x0010
+#define DS_SV_FLAG 0x0020
+#define DS_CC_MODE_FLAG 0x0040
+#define DS_CV_MODE_FLAG 0x0080
+#define DS_CW_MODE_FLAG 0x0100
+#define DS_CR_MODE_FLAG 0x0200
+
struct dev_context {
+ char model[IT8500_MAX_MODEL_NAME_LEN + 1];
+ uint8_t fw_ver_major;
+ uint8_t fw_ver_minor;
+ uint8_t address;
+ double max_current;
+ double min_voltage;
+ double max_voltage;
+ double max_power;
+ double min_resistance;
+ double max_resistance;
+ size_t max_sample_rate_idx;
+
+ double voltage;
+ double current;
+ double power;
+ uint8_t operation_state;
+ uint16_t demand_state;
+ enum itech_it8500_modes mode;
+ gboolean load_on;
+
+ uint64_t sample_rate;
+ struct sr_sw_limits limits;
+
+ GMutex mutex;
};
+SR_PRIV uint8_t itech_it8500_checksum(const uint8_t *packet);
+SR_PRIV const char *itech_it8500_mode_to_string(enum itech_it8500_modes mode);
+SR_PRIV int itech_it8500_string_to_mode(const char *modename,
+ enum itech_it8500_modes *mode);
+SR_PRIV int itech_it8500_send_cmd(struct sr_serial_dev_inst *serial,
+ struct itech_it8500_cmd_packet *cmd,
+ struct itech_it8500_cmd_packet **response);
+SR_PRIV int itech_it8500_cmd(const struct sr_dev_inst *sdi,
+ struct itech_it8500_cmd_packet *cmd,
+ struct itech_it8500_cmd_packet **response);
+SR_PRIV void itech_it8500_status_change(const struct sr_dev_inst *sdi,
+ uint8_t old_op, uint8_t new_op,
+ uint16_t old_de, uint16_t new_de,
+ enum itech_it8500_modes old_m, enum itech_it8500_modes new_m);
+SR_PRIV int itech_it8500_get_status(const struct sr_dev_inst *sdi);
+SR_PRIV int itech_it8500_get_int(const struct sr_dev_inst *sdi,
+ enum itech_it8500_command command, int *result);
+SR_PRIV void itech_it8500_channel_send_value(const struct sr_dev_inst *sdi,
+ struct sr_channel *ch, double value, enum sr_mq mq,
+ enum sr_unit unit, int digits);
SR_PRIV int itech_it8500_receive_data(int fd, int revents, void *cb_data);
#endif
projects / libsigrok.git / blobdiff