altos/stm32f4: Add STM32F413 disco board support

Discovery development board

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

3 files changed, 111 insertions, 0 deletions

diff --git a/src/stm32f4-disco/Makefile b/src/stm32f4-disco/Makefile
new file mode 100644
index 00000000..2d912b22
--- /dev/null
+++ b/src/stm32f4-disco/Makefile
@@ -0,0 +1,30 @@
+include ../stm32f4/Makefile-raw.defs
+
+ALTOS_SRC = \
+	ao_interrupt.c \
+	ao_panic.c \
+	ao_timer.c
+
+CFLAGS = $(STM32F4_CFLAGS)
+
+PROG=stm32f4-disco-$(VERSION)
+ELF=$(PROG).elf
+IHX=$(PROG).ihx
+
+SRC=$(ALTOS_SRC) ao_disco.c
+OBJ=$(SRC:.c=.o)
+MAP=$(PROG).map
+
+all: $(ELF) $(IHX)
+
+$(ELF): Makefile $(OBJ)
+	$(call quiet,CC) $(LDFLAGS) $(CFLAGS) -o $@ $(OBJ) -Wl,-M=$(MAP) $(LIBS)
+
+distclean:	clean
+
+clean:
+	rm -f *.o *.elf *.ihx
+
+install:
+
+uninstall:
diff --git a/src/stm32f4-disco/ao_disco.c b/src/stm32f4-disco/ao_disco.c
new file mode 100644
index 00000000..efbed947
--- /dev/null
+++ b/src/stm32f4-disco/ao_disco.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2018 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <ao.h>
+
+void main(void)
+{
+	float		x;
+	int		r = 1;
+	int		g = 0;
+
+	ao_clock_init();
+
+	ao_timer_init();
+
+	ao_enable_output(LED_GREEN_PORT, LED_GREEN_PIN, 0);
+	ao_enable_output(LED_RED_PORT, LED_RED_PIN, 1);
+	for (;;) {
+		ao_gpio_set(LED_GREEN_PORT, LED_GREEN_PIN, g);
+		ao_gpio_set(LED_RED_PORT, LED_RED_PIN, r);
+		g ^= 1;
+		r ^= 1;
+		for (x = 0.0f; x < 100000.0f; x = x + 0.1f)
+			ao_arch_nop();
+	}
+}
diff --git a/src/stm32f4-disco/ao_pins.h b/src/stm32f4-disco/ao_pins.h
new file mode 100644
index 00000000..3bbace1a
--- /dev/null
+++ b/src/stm32f4-disco/ao_pins.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2018 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+#ifndef _AO_PINS_H_
+#define _AO_PINS_H_
+
+#define HAS_BEEP	0
+
+#define B_USER_PORT	(&stm_gpioa)
+#define B_USER_PIN	0
+
+#define LED_GREEN_PORT	(&stm_gpioc)
+#define LED_GREEN_PIN	5
+#define LED_RED_PORT	(&stm_gpioe)
+#define LED_RED_PIN	3
+
+#define AO_HSE		8000000	/* fed from st/link processor */
+#define AO_HSE_BYPASS	1	/* no xtal, directly fed */
+
+#define AO_PLL_M	8	/* down to 1MHz */
+
+#define AO_PLL1_N	192	/* up to 192MHz */
+#define AO_PLL1_P	2	/* down to 96MHz */
+#define AO_PLL1_Q	4	/* down to 48MHz for USB and SDIO */
+
+#define AO_AHB_PRESCALER	1
+#define AO_RCC_CFGR_HPRE_DIV	STM_RCC_CFGR_HPRE_DIV_1
+
+#define AO_APB1_PRESCALER	1
+#define AO_RCC_CFGR_PPRE1_DIV	STM_RCC_CFGR_PPRE1_DIV_1
+#define AO_APB2_PRESCALER	1
+#define AO_RCC_CFGR_PPRE2_DIV	STM_RCC_CFGR_PPRE2_DIV_1
+
+#endif /* _AO_PINS_H_ */