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stmhal/uart: Increase inter-character timeout by 1ms.

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Sys-tick resolution is 1ms and a value of 2 will give a delay between 1ms
and 2ms (whereas a value of 1 gives a delay between 0ms and 1ms, which is
too short).
This commit is contained in:
Damien George 2016-12-28 17:32:18 +11:00
parent 16a584d7cf
commit e81116d07d
1 changed files with 2 additions and 1 deletions
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3
stmhal/uart.c
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@ -623,8 +623,9 @@ STATIC mp_obj_t pyb_uart_init_helper(pyb_uart_obj_t *self, mp_uint_t n_args, con
// set timeout_char
// make sure it is at least as long as a whole character (13 bits to be safe)
// minimum value is 2ms because sys-tick has a resolution of only 1ms
self->timeout_char = args.timeout_char.u_int;
uint32_t min_timeout_char = 13000 / init->BaudRate + 1;
uint32_t min_timeout_char = 13000 / init->BaudRate + 2;
if (self->timeout_char < min_timeout_char) {
self->timeout_char = min_timeout_char;
}