From: Keith Packard <keithp@keithp.com>
Date: Tue, 16 Jul 2019 18:04:16 +0000 (-0700)
Subject: altos/stmf0: Add 'ao_serial_shutdown'
X-Git-Tag: 1.9.1~1^2~60
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=bdcb3653bd9fb97f98773ac3bc1f87a6f52b1121

altos/stmf0: Add 'ao_serial_shutdown'

This powers down the UART logic on request.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/kernel/ao_serial.h b/src/kernel/ao_serial.h
index 440b562b..3500a093 100644
--- a/src/kernel/ao_serial.h
+++ b/src/kernel/ao_serial.h
@@ -117,6 +117,9 @@ void
 ao_serial3_set_speed(uint8_t speed);
 #endif
 
+void
+ao_serial_shutdown(void);
+
 void
 ao_serial_init(void);
 
diff --git a/src/stmf0/ao_serial_stm.c b/src/stmf0/ao_serial_stm.c
index 5097041a..ef35394a 100644
--- a/src/stmf0/ao_serial_stm.c
+++ b/src/stmf0/ao_serial_stm.c
@@ -375,6 +375,17 @@ ao_serial_set_sw_rts_cts(struct ao_stm_usart *usart,
 }
 #endif
 
+void
+ao_serial_shutdown(void)
+{
+#if HAS_SERIAL_1
+	stm_rcc.apb2enr &= ~(1 << STM_RCC_APB2ENR_USART1EN);
+#endif
+#if HAS_SERIAL_2
+	stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_USART2EN);
+#endif
+}
+
 void
 ao_serial_init(void)
 {