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drivers/dose: clarify timeout calculation

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This commit is contained in:
Benjamin Valentin 2021-11-11 14:43:07 +01:00
parent 32c29bf062
commit 965fa3ef10
1 changed files with 4 additions and 1 deletions
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5
drivers/dose/dose.c
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@ -680,7 +680,10 @@ void dose_setup(dose_t *ctx, const dose_params_t *params, uint8_t index)
/* The timeout base is the minimal timeout base used for this driver.
* We have to ensure it is above the XTIMER_BACKOFF. Otherwise state
* transitions are triggered from another state transition setting up the
* timeout. */
* timeout.
* To calculate how long it takes to transfer one byte we assume
* 8 data bits + 1 start bit + 1 stop bit per byte.
*/
ctx->timeout_base = CONFIG_DOSE_TIMEOUT_BYTES * 10UL * US_PER_SEC / params->baudrate;
if (ctx->timeout_base < xtimer_usec_from_ticks(min_timeout)) {
ctx->timeout_base = xtimer_usec_from_ticks(min_timeout);