Initial push

1 files changed, 47 insertions, 0 deletions

diff --git a/stacks/max25-bcpr/include/bcpr/bcpr_ser12.h b/stacks/max25-bcpr/include/bcpr/bcpr_ser12.h
new file mode 100644
index 0000000..2b6de8d
--- /dev/null
+++ b/stacks/max25-bcpr/include/bcpr/bcpr_ser12.h
@@ -0,0 +1,47 @@
+#ifndef BCPR_SER12_H
+#define BCPR_SER12_H
+
+#include "bcpr/bcpr_hdlc.h"
+#include <stdint.h>
+
+/* DOS cal.exe style: sticky/toggle DTR bit + RTS PTT (no HDLC). */
+enum {
+    BCPR_CAL_OFF = 0,
+    BCPR_CAL_HIGH = 1,
+    BCPR_CAL_LOW = 2,
+    BCPR_CAL_ALT = 3
+};
+
+typedef struct bcpr_ser12 {
+    unsigned baud;
+    unsigned baud_us;
+    int opt_dcd; /* 0 soft, 1 hard, -1 hard inv */
+    unsigned char tx_bit;
+    unsigned char last_rxbit;
+    int dcd_sum0, dcd_sum1, dcd_sum2;
+    int dcd_time;
+    unsigned pll_time;
+    unsigned txshreg;
+    unsigned shreg;
+    int ptt_hw; /* modem PTT keyed (logical; stays 1 during WD pause) */
+    int cal_mode; /* BCPR_CAL_* — bypasses HDLC TX */
+    /* FlexNet SER12 PTT WD — see bcpr_ser12_set_ptt_wd(). */
+    int ptt_wd;
+    unsigned ptt_wd_key_us;
+    unsigned ptt_wd_pause_us;
+    unsigned ptt_wd_phase_start_us;
+    int ptt_wd_pausing; /* 1 → force MCR idle (RTS clear) this tick */
+} bcpr_ser12_t;
+
+void bcpr_ser12_init(bcpr_ser12_t *s, unsigned baud, int opt_dcd);
+void bcpr_ser12_set_mode(bcpr_ser12_t *s, const char *mode, unsigned *baud_out);
+void bcpr_ser12_set_cal(bcpr_ser12_t *s, int cal_mode);
+/* FlexNet defaults: key_ms=14500, pause_ms=500. enable=0 disables. */
+void bcpr_ser12_set_ptt_wd(bcpr_ser12_t *s, int enable, int key_ms, int pause_ms);
+/* Software TOT: drop logical+HW PTT immediately. */
+void bcpr_ser12_force_unkey(bcpr_ser12_t *s);
+/* One bit-time / tick: sample cts (0/1), drive *mcr_out / *thr_feed */
+void bcpr_ser12_tick(bcpr_ser12_t *s, bcpr_hdlc_t *h, int cts, int *mcr_out,
+                     int *do_thr00, unsigned now_us);
+
+#endif