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btstack_util: add btstack_next_cid_ignoring_zero

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This commit is contained in:
Milanka Ringwald 2021-06-09 11:19:15 +02:00
parent 98f6d969a9
commit a73d0b9d3c
3 changed files with 35 additions and 3 deletions
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10
src/btstack_util.c
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@ -479,3 +479,13 @@ uint8_t btstack_crc8_calc(uint8_t *data, uint16_t len){
/* Ones complement */
return 0xFFu - crc8(data, len);
}
uint16_t btstack_next_cid_ignoring_zero(uint16_t current_cid){
uint16_t next_cid;
if (current_cid == 0xffff) {
next_cid = 1;
} else {
next_cid = current_cid + 1;
}
return next_cid;
}

21
src/btstack_util.h
View File

@ -279,12 +279,29 @@ int string_len_for_uint32(uint32_t i);
int count_set_bits_uint32(uint32_t x);
/**
* CRC8 functions using ETSI TS 101 369 V6.3.0.
* Only used by RFCOMM
* @brief Check CRC8 using ETSI TS 101 369 V6.3.0.
* @note Only used by RFCOMM
* @param data
* @param len
* @param check_sum
*/
uint8_t btstack_crc8_check(uint8_t * data, uint16_t len, uint8_t check_sum);
/**
* @brief Calculate CRC8 using ETSI TS 101 369 V6.3.0.
* @note Only used by RFCOMM
* @param data
* @param len
*/
uint8_t btstack_crc8_calc(uint8_t * data, uint16_t len);
/**
* @brief Get next cid
* @param current_cid
* @return next cid skiping 0
*/
uint16_t btstack_next_cid_ignoring_zero(uint16_t current_cid);
/* API_END */
#if defined __cplusplus

7
test/embedded/embedded_test.c
View File

@ -230,6 +230,12 @@ TEST_GROUP(BTstackUtil){
}
};
TEST(BTstackUtil, btstack_next_cid_ignoring_zero){
CHECK_EQUAL(1, btstack_next_cid_ignoring_zero(0));
CHECK_EQUAL(5, btstack_next_cid_ignoring_zero(4));
CHECK_EQUAL(1, btstack_next_cid_ignoring_zero(0xFFFF));
}
TEST(BTstackUtil, bd_addr_cmp){
bd_addr_t a = {0};
bd_addr_t b = {0};
@ -241,7 +247,6 @@ TEST(BTstackUtil, bd_addr_cmp){
bd_addr_t a3 = {0xBC, 0xEC, 0x5D, 0xE6, 0x15, 0x03};
bd_addr_t b3 = {0xCB, 0xEC, 0x5D, 0xE6, 0x15, 0x03};
CHECK(0 != bd_addr_cmp(a3, b3));
}
TEST(BTstackUtil, bd_addr_copy){