FHSS: Static channel functions added

Author: Jarkko Paso

source/Service_Libs/fhss/channel_functions.c

@@ -42,7 +42,7 @@
 static uint32_t global_seed = 1;
 
 
-uint16_t tr51_calc_nearest_prime_number(uint16_t start_value)
+static uint16_t tr51_calc_nearest_prime_number(uint16_t start_value)
 {
     if (start_value < 2) {
         return 0;
@@ -60,22 +60,28 @@ uint16_t tr51_calc_nearest_prime_number(uint16_t start_value)
     return 0;
 }
 
-void tr51_seed_rand(uint32_t seed)
+static void tr51_seed_rand(uint32_t seed)
 {
     if (!seed) {
         seed = 1;
     }
     global_seed = seed;
 }
 
-int32_t tr51_get_rand(void)
+static int32_t tr51_get_rand(void)
 {
     uint32_t random_val = ((global_seed * 1103515245) + 12345) & 0x7fffffff;
     global_seed = random_val;
     return random_val;
 }
 
-void tr51_calculate_channel_table(uint16_t number_of_channels, uint16_t nearest_prime, int32_t *channel_table)
+/**
+ * @brief Calculate channel table based on TR51 channel function.
+ * @param number_of_channels Number of channels in table.
+ * @param nearest_prime Nearest prime number. Must be equal to or larger than number_of_channels.
+ * @param channel_table Output channel table. Has to be at least nearest_prime in length.
+ */
+static void tr51_calculate_channel_table(uint16_t number_of_channels, uint16_t nearest_prime, int32_t *channel_table)
 {
     int32_t i,j,k;
     tr51_seed_rand(1);
@@ -97,7 +103,7 @@ void tr51_calculate_channel_table(uint16_t number_of_channels, uint16_t nearest_
     }
 }
 
-void tr51_compute_cfd(uint8_t *mac, uint8_t *first_element, uint8_t *step_size, uint16_t channel_table_length)
+static void tr51_compute_cfd(uint8_t *mac, uint8_t *first_element, uint8_t *step_size, uint16_t channel_table_length)
 {
     *first_element = (mac[5] ^ mac[6] ^ mac[7]) % channel_table_length;
     *step_size = (mac[7] % (channel_table_length - 1)) + 1;
@@ -116,7 +122,18 @@ static uint8_t tr51_find_excluded(int32_t channel, uint16_t *excluded_channels,
     return 0;
 }
 
-uint16_t tr51_calculate_hopping_sequence(int32_t *channel_table, uint16_t channel_table_length, uint8_t first_element, uint8_t step_size, int32_t *output_table, uint16_t *excluded_channels, uint16_t number_of_excluded_channels)
+/**
+ * @brief Calculate hopping sequence for a specific peer using tr51 channel function.
+ * @param channel_table Used channel table.
+ * @param channel_table_length Length of the used channel table.
+ * @param first_element Start generated by CFD function.
+ * @param step_size Step size generated by CFD function.
+ * @param output_table Output hopping sequence table.
+ * @param excluded_channels List of not used channels.
+ * @param number_of_excluded_channels Number of not used channels.
+ * @return Number of channels in sequence.
+ */
+static uint16_t tr51_calculate_hopping_sequence(int32_t *channel_table, uint16_t channel_table_length, uint8_t first_element, uint8_t step_size, int32_t *output_table, uint16_t *excluded_channels, uint16_t number_of_excluded_channels)
 {
     uint16_t cntr = channel_table_length;
     uint8_t index = first_element;

source/Service_Libs/fhss/channel_functions.h

@@ -16,26 +16,6 @@
  */
 #ifndef CHANNEL_FUNC_H_
 #define CHANNEL_FUNC_H_
-/**
- * @brief Calculate channel table based on TR51 channel function.
- * @param number_of_channels Number of channels in table.
- * @param nearest_prime Nearest prime number. Must be equal to or larger than number_of_channels.
- * @param channel_table Output channel table. Has to be at least nearest_prime in length.
- */
-void tr51_calculate_channel_table(uint16_t number_of_channels, uint16_t nearest_prime, int32_t *channel_table);
-
-/**
- * @brief Calculate hopping sequence for a specific peer using tr51 channel function.
- * @param channel_table Used channel table.
- * @param channel_table_length Length of the used channel table.
- * @param first_element Start generated by CFD function.
- * @param step_size Step size generated by CFD function.
- * @param output_table Output hopping sequence table.
- * @param excluded_channels List of not used channels.
- * @param number_of_excluded_channels Number of not used channels.
- * @return Number of channels in sequence.
- */
-uint16_t tr51_calculate_hopping_sequence(int32_t *channel_table, uint16_t channel_table_length, uint8_t first_element, uint8_t step_size, int32_t *output_table, uint16_t *excluded_channels, uint16_t number_of_excluded_channels);
 
 /**
  * @brief Compute the unicast schedule channel index using tr51 channel function.