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jerzy pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git
The following commit(s) were added to refs/heads/master by this push:
new d75f60ea7 mcu/nrf5340: Disable UART before pin configuration
d75f60ea7 is described below
commit d75f60ea774328d347dc60beb5608bf39d0f5b4b
Author: Jerzy Kasenberg <[email protected]>
AuthorDate: Tue Jan 20 08:13:33 2026 +0100
mcu/nrf5340: Disable UART before pin configuration
Code was modifying UART PSEL configuration even
when peripheal was alreay enabled.
In normal case this is not a problem since during
hal_uart_init is called peripheral is not enabled.
However when booloader already enabled UART and
application tried to used peripheral with different
pin configuration change would not be apply
With this change peripheral is disabled before
modification it will be enabled later when needed.
Signed-off-by: Jerzy Kasenberg <[email protected]>
---
hw/mcu/nordic/nrf5340/src/hal_uart.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/mcu/nordic/nrf5340/src/hal_uart.c
b/hw/mcu/nordic/nrf5340/src/hal_uart.c
index e4a2dacf4..d8341cea8 100644
--- a/hw/mcu/nordic/nrf5340/src/hal_uart.c
+++ b/hw/mcu/nordic/nrf5340/src/hal_uart.c
@@ -354,6 +354,8 @@ hal_uart_init(int port, void *arg)
assert(false);
}
+ /* Disable UART for pin configuration */
+ u->nrf_uart->ENABLE = 0;
u->nrf_uart->PSEL.TXD = cfg->suc_pin_tx;
u->nrf_uart->PSEL.RXD = cfg->suc_pin_rx;
u->nrf_uart->PSEL.RTS = cfg->suc_pin_rts;
