From 8458978ad5512dc813ac700d59983c56917fa205 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 26 Jul 2020 11:55:32 +0200
Subject: Add minimal STM32F446RE Nucleo support. No interrupts yet.

---
 src/arch/stm32f446re-nucleo/driver/gpio.cc   |  3 +++
 src/arch/stm32f446re-nucleo/driver/stdout.cc | 31 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 src/arch/stm32f446re-nucleo/driver/gpio.cc
 create mode 100644 src/arch/stm32f446re-nucleo/driver/stdout.cc

(limited to 'src/arch/stm32f446re-nucleo/driver')

diff --git a/src/arch/stm32f446re-nucleo/driver/gpio.cc b/src/arch/stm32f446re-nucleo/driver/gpio.cc
new file mode 100644
index 0000000..1403aed
--- /dev/null
+++ b/src/arch/stm32f446re-nucleo/driver/gpio.cc
@@ -0,0 +1,3 @@
+#include "driver/gpio.h"
+
+GPIO gpio;
diff --git a/src/arch/stm32f446re-nucleo/driver/stdout.cc b/src/arch/stm32f446re-nucleo/driver/stdout.cc
new file mode 100644
index 0000000..2c20158
--- /dev/null
+++ b/src/arch/stm32f446re-nucleo/driver/stdout.cc
@@ -0,0 +1,31 @@
+#include "driver/stdout.h"
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/usart.h>
+
+void StandardOutput::setup()
+{
+	rcc_periph_clock_enable(RCC_USART2);
+	gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2);
+	gpio_set_af(GPIOA, GPIO_AF7, GPIO2);
+
+	usart_set_baudrate(USART2, 115200);
+	usart_set_databits(USART2, 8);
+	usart_set_stopbits(USART2, USART_STOPBITS_1);
+	usart_set_mode(USART2, USART_MODE_TX);
+	usart_set_parity(USART2, USART_PARITY_NONE);
+	usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+
+	usart_enable(USART2);
+}
+
+void StandardOutput::put(char c)
+{
+	usart_send_blocking(USART2, c);
+	if (c == '\n') {
+		put('\r');
+	}
+}
+
+StandardOutput kout;
-- 
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