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https://github.com/jfdelnero/rf-tools.git
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areas list decoder.
This commit is contained in:
Jean-François DEL NERO
+134
-15
@@ -29,7 +29,7 @@
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// Star Météo protocol :
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//
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// The Star Météo protocol was rebuilt based on multiple observations, tests
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// and team discussions with multiple people (ChrisJ, Jaymore, JeffHxC, obones...)
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// and team discussions with multiple people (ChrisJ, Jaymore, JeffHxC, obones, ...)
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// on the TetraHub Forum, the largest French language online community and discussion
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// board dedicated to radiocommunications, radio scanning, and digital radio systems
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//
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@@ -45,7 +45,7 @@
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//
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// Quartets Encoding :
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//
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// Valid POCSAG Alpha characters :
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// Valid POCSAG Alpha characters :
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//
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// 0x20<>0x22,
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// 0x24<>0x3F
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@@ -66,6 +66,10 @@
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// -------------------------------------------------------------------------------
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// Time Frame :
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//
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// | CURRENT_TIME_BLOCK | AREAS_ID_BLOCK |
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//
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// CURRENT_TIME_BLOCK :
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//
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// [0xF][HOUR][MINUTES_HIGH_BCD][MINUTES_LOW_BCD][MONTH][MONTH_DAY_YEAR_0][MONTH_DAY_YEAR_1][MONTH_DAY_YEAR_2][LOW_CHECKSUM]
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//
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// HOUR quartet encoding :
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@@ -98,30 +102,73 @@
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//
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// LOW_CHECKSUM <= 0x7 + sum of all previous quartets (from quartet [0xF] to [MONTH_DAY_YEAR_2])
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//
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// ----
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//
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// AREAS_ID_BLOCK :
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//
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// Warning : Most of the data in this frame/block are not aligned to the quartets.
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//
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// [0x0][0x0][0x0]<TRANSMISSIONS_INTERVAL (5 bits)><NUMBER_OF_AREAS (5bits)><AREAS_ID_LIST (NUMBER_OF_AREAS*7 Bits)>[RFU][HIGH_CHECKSUM][LOW_CHECKSUM][0][0]
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//
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// TRANSMISSIONS_INTERVAL encoding :
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//
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// 5 bits length
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// TRANSMISSIONS_INTERVAL <= (minutes between the forecast transmissions)
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//
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// The station listening reference times are 00:00 AM, 06:00 AM, 12:00 PM and 06:00 PM.
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// The listening 4 minutes window start time is : reference time + (TRANSMISSIONS_INTERVAL * AREA_INDEX).
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// example : The Area list is : 75 91 78 93 92
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// With TRANSMISSIONS_INTERVAL set to 12, if the station is set the to '93' area (index 3), the listening minutes is TRANSMISSIONS_INTERVAL * 3 = 36.
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// So the station will listen the radio at 0h36, 6h36, 12h36 and 18h36.
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//
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// NUMBER_OF_AREAS encoding :
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//
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// 5 bits length
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// NUMBER_OF_AREAS <= (number of 7 bits areas id following this field)
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//
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// AREAS_ID_LIST :
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//
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// 7 bits per ID. Total size : (7 bits * NUMBER_OF_AREAS) + pad to align the end of the list to the next quartet.
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// Pad the last list quartet with 0.
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//
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// AREAS_ID_LIST[x] <= French area ID (example : 75 = Paris)
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//
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// RFU :
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//
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// Filling quartet. Can be 0x1, 0x5, 0x7...
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//
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// HIGH_CHECKSUM quartet encoding :
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//
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// HIGH_CHECKSUM <= (0x7 + sum of all previous quartets (from quartet [0x0] to [RFU]))(7 downto 4)
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//
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// LOW_CHECKSUM quartet encoding :
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//
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// LOW_CHECKSUM <= (0x7 + sum of all previous quartets (from quartet [0xF] to [RFU]))(3 downto 0)
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//
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// -------------------------------------------------------------------------------
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// Forecasts frame
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//
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// | Header (6 quartets) | n+0 day_forcast (15 quartets) | n+1 day_forcast (15 quartets) | ... | n+5 day_forcast (15 quartets) | Probability of rain frame (if TYPE==0x0) |
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// | HEADER_BLOCK (6 quartets) | n+0 FORECAST_BLOCK (15 quartets) | n+1 FORECAST_BLOCK (15 quartets) | ... | n+5 FORECAST_BLOCK (15 quartets) | RAIN_PROBABILITY_BLOCK (if TYPE==0x0) |
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//
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// ----
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//
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// Header :
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// HEADER_BLOCK :
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//
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// [TYPE][AREA_CODE_HIGH][AREA_CODE_LOW][0x0][0x4][LOW_CHECKSUM]
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// [TYPE][AREA_ID_HIGH][AREA_ID_LOW][0x0][0x4][LOW_CHECKSUM]
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//
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// TYPE encoding :
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// 0x4 : Forecast without the rain probability forecast
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// 0x0 : Extended forecast with rain probability
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//
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// AREA_CODE_HIGH encoding :
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// AREA_ID_HIGH encoding :
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//
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// AREA_CODE_HIGH <= (area code)(7 downto 4)
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// AREA_ID_HIGH <= (area id)(7 downto 4)
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//
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// AREA_CODE_HIGH encoding :
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// AREA_ID_LOW encoding :
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//
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// AREA_CODE_HIGH <= (area code)(3 downto 0)
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// AREA_ID_LOW <= (area id)(3 downto 0)
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//
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// Note : Default area code used by the station : 75 - which is the Paris area.
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// Note : Default area id used by the station : 75 (Paris).
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//
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// LOW_CHECKSUM quartet encoding :
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//
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@@ -129,7 +176,7 @@
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//
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// ----
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//
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// day_forecast :
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// FORECAST_BLOCK :
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//
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// [LOW_TEMP_HIGH_BCD][LOW_TEMP_LOW_BCD][HIGH_TEMP_HIGH_BCD][HIGH_TEMP_LOW_BCD] ...
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// [PICTO_CODE_HIGH_0][PICTO_CODE_LOW_0][PICTO_CODE_HIGH_1][PICTO_CODE_LOW_1][PICTO_CODE_HIGH_2][PICTO_CODE_LOW_2][PICTO_CODE_HIGH_3][PICTO_CODE_LOW_3][PICTO_CODE_HIGH_4][PICTO_CODE_LOW_5][LOW_CHECKSUM]
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@@ -156,6 +203,11 @@
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// LOW_CHECKSUM <= 0x7 + sum of all previous quartets (from quartet [LOW_TEMP_HIGH_BCD] to [PICTO_CODE_LOW_5])
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//
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// ----
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//
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// RAIN_PROBABILITY_BLOCK :
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//
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// TODO
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//
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#include <errno.h>
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#include <stdio.h>
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@@ -285,6 +337,29 @@ void set_quartet( unsigned char * buf, int idx, unsigned char q)
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return;
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}
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uint32_t get_field(unsigned char * quartets_array, int bitidx, int fieldsize, int quartets_array_size)
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{
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int j;
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uint32_t val;
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val = 0;
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j = 0;
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while(j<fieldsize && (bitidx >> 2) < quartets_array_size )
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{
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val <<= 1;
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if ( quartets_array[bitidx >> 2] & (0x8 >> (bitidx&3)) )
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{
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val |= 0x1;
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}
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bitidx++;
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j++;
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}
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return val;
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}
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// Encode temperature to BCD+40
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unsigned char dectemp_to_bcd(int temp)
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{
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@@ -482,7 +557,7 @@ int main(int argc, char* argv[])
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frame * genfrm;
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int sum;
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char tmp_str[512];
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int forcast_cnt;
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int forecast_cnt;
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int prev_cnt,ck;
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verbose = 0;
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@@ -614,6 +689,50 @@ int main(int argc, char* argv[])
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{
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printf(" (Bad checksum) ");
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}
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printf(" Area codes : ");
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i++;
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idx = (i + 3) * 4;
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int interval_minutes, areas_cnt, areas_id;
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interval_minutes = get_field((unsigned char*)&genfrm[b].quartetfrm, idx, 5, MAX_MSG_SIZE*3);
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idx += 5;
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areas_cnt = get_field((unsigned char*)&genfrm[b].quartetfrm, idx, 5, MAX_MSG_SIZE*3);
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idx += 5;
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for(int areaidx=0;areaidx<areas_cnt;areaidx++)
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{
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areas_id = get_field((unsigned char*)&genfrm[b].quartetfrm, idx, 7, MAX_MSG_SIZE*3);
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idx += 7;
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printf("%d ", areas_id);
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}
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if (idx & 3)
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idx = (idx & (~0x3)) + 0x4;
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idx += 4;
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printf("Interval (minutes) : %d ", interval_minutes);
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sum = 0x7;
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while(i<(idx>>2))
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{
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sum += genfrm[b].quartetfrm[i];
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i++;
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}
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if( (sum&0xFF) == ( (genfrm[b].quartetfrm[i]<<4) | genfrm[b].quartetfrm[i+1] ) )
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{
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printf(" (Valid checksum)") ;
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}
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else
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{
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printf(" (Bad checksum) ");
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}
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printf("\n");
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break;
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@@ -816,15 +935,15 @@ int main(int argc, char* argv[])
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free(genfrm);
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}
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forcast_cnt = 0;
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forecast_cnt = 0;
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param_start_index = 0;
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while( isOption(argc, argv,"forecast",(char*)tmp_str, ¶m_start_index) )
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{
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forcast_cnt++;
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forecast_cnt++;
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param_start_index++;
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}
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if(forcast_cnt)
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if(forecast_cnt)
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{
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int departement;
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