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Wakeup/delay fixes, and actually add retries for incoming and outgoing.

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This commit is contained in:
Ian Gulliver
2016-02-21 16:47:27 -08:00
parent 835a144d6e
commit 8f36ad0db8
4 changed files with 76 additions and 41 deletions
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15
adsbus/common.c
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@@ -236,19 +236,12 @@ void rand_fill(void *value, size_t size) {
#define RETRY_MIN_MS 2000
#define RETRY_MAX_MS 64000
#define RETRY_MULT 2
#define RETRY_MAX_JITTER_DIV 2
uint32_t retry_get_delay_ms(uint32_t prev_delay) {
uint32_t delay = prev_delay * RETRY_MULT;
delay = delay < RETRY_MIN_MS ? RETRY_MIN_MS : delay;
delay = delay > RETRY_MAX_MS ? RETRY_MAX_MS : delay;
uint32_t retry_get_delay_ms(uint32_t attempt) {
uint32_t max_delay = RETRY_MIN_MS * (1 << attempt);
max_delay = max_delay > RETRY_MAX_MS ? RETRY_MAX_MS : max_delay;
uint32_t max_jitter = delay / RETRY_MAX_JITTER_DIV;
uint32_t jitter;
rand_fill(&jitter, sizeof(jitter));
delay += jitter % max_jitter;
delay = delay > RETRY_MAX_MS ? RETRY_MAX_MS : delay;
return delay;
return jitter % max_delay;
}