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n_tx_preamble_modem_samples function

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n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv)
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DJ2LS 2021-02-25 08:40:48 +01:00 committed by GitHub
parent 76aa3094fc
commit c9c869e802
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1 changed files with 7 additions and 6 deletions
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11
modem.py
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@ -107,10 +107,11 @@ class RF():
payload_per_frame = bytes_per_frame -2
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv) #get n_tx_modem_samples which defines the size of the modulation object
n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv)
mod_out = ctypes.c_short * n_tx_modem_samples
mod_out = mod_out()
mod_out_preamble = ctypes.c_short * (n_tx_modem_samples) #*2 #1760 for mode 10,11,12 #4000 for mode 9
mod_out_preamble = ctypes.c_short * n_tx_preamble_modem_samples #*2 #1760 for mode 10,11,12 #4000 for mode 9
mod_out_preamble = mod_out_preamble()
buffer = bytearray(payload_per_frame) # use this if CRC16 checksum is required ( DATA1-3)
@ -121,8 +122,7 @@ class RF():
buffer += crc # append crc16 to buffer
data = (ctypes.c_ubyte * bytes_per_frame).from_buffer_copy(buffer)
preamble_bytes = self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
txbuffer = bytearray()
txbuffer += bytes(mod_out_preamble)
@ -153,13 +153,14 @@ class RF():
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv)#*2 #get n_tx_modem_samples which defines the size of the modulation object
n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv)
mod_out = ctypes.c_short * n_tx_modem_samples
mod_out = mod_out()
mod_out_preamble = ctypes.c_short * (3520) #*2 #1760 for mode 10,11,12 #4000 for mode 9
mod_out_preamble = ctypes.c_short * n_tx_preamble_modem_samples #*2 #1760 for mode 10,11,12 #4000 for mode 9
mod_out_preamble = mod_out_preamble()
preamble = self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble);
self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble);
txbuffer = bytearray()
txbuffer += bytes(mod_out_preamble)