X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fstm%2Fao_boot_pin.c;fp=src%2Fstm%2Fao_boot_pin.c;h=03b0214f6bf492fed6be3639d42f945588e1a45b;hp=0000000000000000000000000000000000000000;hb=b1a43ce313c85cb7f8f16f7f0647d9d4320ba692;hpb=56a7cbbf51f5c9ebbfe17d1cc30ed807572af3cc

diff --git a/src/stm/ao_boot_pin.c b/src/stm/ao_boot_pin.c
new file mode 100644
index 00000000..03b0214f
--- /dev/null
+++ b/src/stm/ao_boot_pin.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2013 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; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_boot.h>
+#include <ao_exti.h>
+
+void
+ao_boot_check_pin(void)
+{
+	uint16_t v;
+
+	/* Enable power interface clock */
+	stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
+	
+	/* Enable the input pin */
+	ao_enable_input(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN,
+			AO_BOOT_APPLICATION_MODE);
+
+	/* Read the value */
+	v = stm_gpio_get(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN);
+
+	/* Reset the chip to turn off the port and the power interface clock */
+	ao_gpio_set_mode(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN, 0);
+	ao_disable_port(&AO_BOOT_APPLICATION_GPIO);
+	stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_PWREN);
+	if (v == AO_BOOT_APPLICATION_VALUE)
+		ao_boot_chain(AO_BOOT_APPLICATION_BASE);
+}