#define LIBSIGROK_HARDWARE_BRYMEN_DMM_PROTOCOL_H
#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "brymen-dmm: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
+#define LOG_PREFIX "brymen-dmm"
+
+#define DMM_BUFSIZE 256
+
+enum packet_len_status {
+ PACKET_HEADER_OK,
+ PACKET_NEED_MORE_DATA,
+ PACKET_INVALID_HEADER,
+};
/** Private, per-device-instance driver context. */
struct dev_context {
/** The current number of already received samples. */
uint64_t num_samples;
+
+ /** Start time of acquisition session */
+ int64_t starttime;
+
+ uint8_t buf[DMM_BUFSIZE];
+ int bufoffset;
+ int buflen;
+ int next_packet_len;
};
+/**
+ * Callback that assesses the size and status of the incoming packet.
+ *
+ * @return PACKET_HEADER_OK - This is a proper packet header.
+ * PACKET_NEED_MORE_DATA The buffer does not contain the entire header.
+ * PACKET_INVALID_HEADER Not a valid start of packet.
+ */
+typedef int (*packet_length_t)(const uint8_t *buf, int *len);
+
SR_PRIV int brymen_dmm_receive_data(int fd, int revents, void *cb_data);
+SR_PRIV int brymen_packet_request(struct sr_serial_dev_inst *serial);
+
+SR_PRIV int brymen_packet_length(const uint8_t *buf, int *len);
+SR_PRIV gboolean brymen_packet_is_valid(const uint8_t *buf);
+
+SR_PRIV int brymen_parse(const uint8_t *buf, float *floatval,
+ struct sr_datafeed_analog *analog, void *info);
+
+SR_PRIV int brymen_stream_detect(struct sr_serial_dev_inst *serial,
+ uint8_t *buf, size_t *buflen,
+ packet_length_t get_packet_size,
+ packet_valid_callback is_valid,
+ uint64_t timeout_ms, int baudrate);
#endif