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mimxrt10xx: Return proper UART read length when everything was read

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arturo182 2020-03-26 00:15:48 +01:00
parent 59eb35da30
commit 18c12e7822
1 changed files with 6 additions and 1 deletions
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7
ports/mimxrt10xx/common-hal/busio/UART.c
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@ -270,9 +270,14 @@ size_t common_hal_busio_uart_read(busio_uart_obj_t *self, uint8_t *data, size_t
LPUART_TransferAbortReceive(self->uart, &self->handle); LPUART_TransferAbortReceive(self->uart, &self->handle);
} }
// No data left, we got it all
if (self->handle.rxData == NULL) {
return len;
}
// The only place we can reliably tell how many bytes have been received is from the current // The only place we can reliably tell how many bytes have been received is from the current
// wp in the handle (because the abort nukes rxDataSize, and reading it before abort is a race.) // wp in the handle (because the abort nukes rxDataSize, and reading it before abort is a race.)
return self->handle.rxData-data; return self->handle.rxData - data;
} }
// Write characters. // Write characters.