Commit 5c00757a authored by Damien George's avatar Damien George
Browse files

stmhal: uart ioctl uses EINVAL, and checks TXE bit for write-ability.

parent 013d53c0
......@@ -27,6 +27,7 @@
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include "stm32f4xx_hal.h"
......@@ -488,12 +489,11 @@ mp_uint_t uart_ioctl(mp_obj_t self_in, mp_uint_t request, int *errcode, ...) {
if ((flags & MP_IOCTL_POLL_RD) && uart_rx_any(self)) {
ret |= MP_IOCTL_POLL_RD;
}
if (flags & MP_IOCTL_POLL_WR) {
// TODO can we always write?
if ((flags & MP_IOCTL_POLL_WR) && __HAL_UART_GET_FLAG(&self->uart, UART_FLAG_TXE)) {
ret |= MP_IOCTL_POLL_WR;
}
} else {
*errcode = 1; // EPERM, operation not permitted
*errcode = EINVAL;
ret = -1;
}
va_end(vargs);
......
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