asix-sigma: Enforce optionally specified sample count

[libsigrok.git] / src / hardware / asix-sigma / protocol.h

diff --git a/src/hardware/asix-sigma/protocol.h b/src/hardware/asix-sigma/protocol.h
index cbacb6715376337d03b39250f527661641446bb6..e4b3ea5f1106e994ccd9e81e90b436b475dd3931 100644 (file)
--- a/src/hardware/asix-sigma/protocol.h
+++ b/src/hardware/asix-sigma/protocol.h
@@ -30,6 +30,14 @@
 #include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
+/*
+ * Triggers are not working in this implementation. Stop claiming
+ * support for the feature which effectively is not available, until
+ * the implementation got fixed. Yet keep the code in place and allow
+ * developers to turn on this switch during development.
+ */
+#define ASIX_SIGMA_WITH_TRIGGER        0
+
 #define LOG_PREFIX "asix-sigma"
 
 #define USB_VENDOR                     0xa600
@@ -90,6 +98,26 @@ enum sigma_read_register {
 
 #define CHUNK_SIZE             1024
 
+/* WRITE_MODE register fields. */
+#define WMR_SDRAMWRITEEN       (1 << 0)
+#define WMR_SDRAMREADEN                (1 << 1)
+#define WMR_TRGRES             (1 << 2)
+#define WMR_TRGEN              (1 << 3)
+#define WMR_FORCESTOP          (1 << 4)
+#define WMR_TRGSW              (1 << 5)
+/* not used: bit position 6 */
+#define WMR_SDRAMINIT          (1 << 7)
+
+/* READ_MODE register fields. */
+#define RMR_SDRAMWRITEEN       (1 << 0)
+#define RMR_SDRAMREADEN                (1 << 1)
+/* not used: bit position 2 */
+#define RMR_TRGEN              (1 << 3)
+#define RMR_ROUND              (1 << 4)
+#define RMR_TRIGGERED          (1 << 5)
+#define RMR_POSTTRIGGERED      (1 << 6)
+/* not used: bit position 7 */
+
 /*
  * The entire ASIX Sigma DRAM is an array of struct sigma_dram_line[1024];
  */
@@ -210,6 +238,8 @@ struct dev_context {
        uint64_t cur_samplerate;
        uint64_t period_ps;
        uint64_t limit_msec;
+       uint64_t limit_samples;
+       uint64_t sent_samples;
        struct timeval start_tv;
        int cur_firmware;
        int num_channels;
@@ -229,6 +259,8 @@ SR_PRIV int sigma_write_register(uint8_t reg, uint8_t *data, size_t len,
 SR_PRIV int sigma_set_register(uint8_t reg, uint8_t value, struct dev_context *devc);
 SR_PRIV int sigma_write_trigger_lut(struct triggerlut *lut, struct dev_context *devc);
 SR_PRIV void sigma_clear_helper(void *priv);
+SR_PRIV uint64_t sigma_limit_samples_to_msec(const struct dev_context *devc,
+                                            uint64_t limit_samples);
 SR_PRIV int sigma_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate);
 SR_PRIV int sigma_convert_trigger(const struct sr_dev_inst *sdi);
 SR_PRIV int sigma_receive_data(int fd, int revents, void *cb_data);