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samd/machine_uart: Fix lock-up in loopback mode if read buffer is full.

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Signed-off-by: robert-hh <robert@hammelrath.com>
This commit is contained in:
robert-hh
2025-03-09 11:39:12 +01:00
committed by Damien George
parent 6db7b47ab9
commit 4dfee50a0b
1 changed files with 2 additions and 1 deletions
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ports/samd/machine_uart.c
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@@ -156,7 +156,8 @@ void common_uart_irq_handler(int uart_id) {
} }
} }
#endif #endif
} else if (uart->USART.INTFLAG.bit.DRE != 0) { }
if (uart->USART.INTFLAG.bit.DRE != 0) {
#if MICROPY_HW_UART_TXBUF #if MICROPY_HW_UART_TXBUF
// handle the outgoing data // handle the outgoing data
if (ringbuf_avail(&self->write_buffer) > 0) { if (ringbuf_avail(&self->write_buffer) > 0) {