anchao commented on code in PR #8439:
URL: https://github.com/apache/nuttx/pull/8439#discussion_r1097354992
##########
arch/arm/src/rp2040/rp2040_serial.c:
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@@ -884,8 +884,7 @@ static bool up_rxavailable(struct uart_dev_s *dev)
static void up_send(struct uart_dev_s *dev, int ch)
{
- struct up_dev_s *priv = (struct up_dev_s *)dev->priv;
- up_serialout(priv, RP2040_UART_UARTDR_OFFSET, (uint32_t)ch);
+ up_putc(ch);
Review Comment:
Done, use arm_lowputc() instead of up_putc()
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