Add preliminary STM32F746ZG-Nucleo support

4 files changed, 71 insertions, 0 deletions

diff --git a/src/arch/stm32f746zg-nucleo/driver/counter.cc b/src/arch/stm32f746zg-nucleo/driver/counter.cc
new file mode 100644
index 0000000..5f007f1
--- /dev/null
+++ b/src/arch/stm32f746zg-nucleo/driver/counter.cc
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2024 Birte Kristina Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "arch.h"
+#include "driver/counter.h"
+
+Counter counter;
+
+void tim2_isr(void)
+{
+	if (timer_get_flag(TIM2, TIM_SR_UIF)) {
+		timer_clear_flag(TIM2, TIM_SR_UIF);
+		if (counter.overflow < 4294967295) {
+			counter.overflow++;
+		}
+	}
+}
diff --git a/src/arch/stm32f746zg-nucleo/driver/gpio.cc b/src/arch/stm32f746zg-nucleo/driver/gpio.cc
new file mode 100644
index 0000000..82a9fd0
--- /dev/null
+++ b/src/arch/stm32f746zg-nucleo/driver/gpio.cc
@@ -0,0 +1,8 @@
+/*
+ * Copyright 2024 Birte Kristina Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "driver/gpio.h"
+
+GPIO gpio;
diff --git a/src/arch/stm32f746zg-nucleo/driver/stdout.cc b/src/arch/stm32f746zg-nucleo/driver/stdout.cc
new file mode 100644
index 0000000..9a5bdfb
--- /dev/null
+++ b/src/arch/stm32f746zg-nucleo/driver/stdout.cc
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2024 Birte Kristina Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#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_USART3);
+	gpio_mode_setup(GPIOD, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO8);
+	gpio_set_af(GPIOD, GPIO_AF7, GPIO8);
+
+	usart_set_baudrate(USART3, 115200);
+	usart_set_databits(USART3, 8);
+	usart_set_stopbits(USART3, USART_STOPBITS_1);
+	usart_set_mode(USART3, USART_MODE_TX);
+	usart_set_parity(USART3, USART_PARITY_NONE);
+	usart_set_flow_control(USART3, USART_FLOWCONTROL_NONE);
+
+	usart_enable(USART3);
+}
+
+void StandardOutput::put(char c)
+{
+	usart_send_blocking(USART3, c);
+	if (c == '\n') {
+		put('\r');
+	}
+}
+
+StandardOutput kout;
diff --git a/src/arch/stm32f746zg-nucleo/driver/uptime.cc b/src/arch/stm32f746zg-nucleo/driver/uptime.cc
new file mode 100644
index 0000000..8ddb57a
--- /dev/null
+++ b/src/arch/stm32f746zg-nucleo/driver/uptime.cc
@@ -0,0 +1,8 @@
+/*
+ * Copyright 2024 Birte Kristina Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "driver/uptime.h"
+
+Uptime uptime;