X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fstm%2Fao_exti_stm.c;fp=src%2Fstm%2Fao_exti_stm.c;h=013d453be2f456dce4540280d3bb4a81e3157745;hb=1489263b895a2a825e29d0560c9b1dbba8a3f431;hp=0000000000000000000000000000000000000000;hpb=cc305ea231ae22278abf91c0d9925f5992945369;p=fw%2Faltos

diff --git a/src/stm/ao_exti_stm.c b/src/stm/ao_exti_stm.c
new file mode 100644
index 00000000..013d453b
--- /dev/null
+++ b/src/stm/ao_exti_stm.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright © 2012 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_exti.h>
+
+static void	(*ao_exti_callback[16])(void);
+
+static void
+ao_exti_isr(void) {
+	uint32_t	pending = stm_exti.pr;
+	uint8_t		pin;
+
+	/* Clear pending interrupts */
+	stm_exti.pr = pending;
+	for (pin = 0; pin < 16 && pending; pin++) {
+		uint32_t	mask = (1 << pin);
+
+		if (pending & mask) {
+			pending &= ~mask;
+			if (ao_exti_callback[pin])
+				(*ao_exti_callback[pin])();
+		}
+	}
+}
+
+void stm_exti0_isr(void) { ao_exti_isr(); }
+void stm_exti1_isr(void) { ao_exti_isr(); }
+void stm_exti2_isr(void) { ao_exti_isr(); }
+void stm_exti3_isr(void) { ao_exti_isr(); }
+void stm_exti4_isr(void) { ao_exti_isr(); }
+void stm_exti9_5_isr(void) { ao_exti_isr(); }
+void stm_exti15_10_isr(void) { ao_exti_isr(); }
+
+void
+ao_exti_setup (struct stm_gpio *gpio, uint8_t pin, uint8_t mode, void (*callback)(void)) {
+	uint32_t	mask = 1 << pin;
+	uint32_t	pupdr;
+	uint8_t		irq;
+	
+	ao_exti_callback[pin] = callback;
+	/* configure pin as input, setting selected pull-up/down mode */
+	stm_moder_set(gpio, pin, STM_MODER_INPUT);
+	switch (mode & (AO_EXTI_MODE_PULL_UP|AO_EXTI_MODE_PULL_DOWN)) {
+	case 0:
+	default:
+		pupdr  = STM_PUPDR_NONE;
+		break;
+	case AO_EXTI_MODE_PULL_UP:
+		pupdr = STM_PUPDR_PULL_UP;
+		break;
+	case AO_EXTI_MODE_PULL_DOWN:
+		pupdr = STM_PUPDR_PULL_DOWN;
+		break;
+	}
+	stm_pupdr_set(gpio, pin, pupdr);
+
+	/* Set interrupt mask and rising/falling mode */
+	stm_exti.imr &= ~mask;
+	stm_exti.rtsr |= mask;
+	if (mode & AO_EXTI_MODE_RISING)
+		stm_exti.rtsr |= mask;
+	if (mode & AO_EXTI_MODE_FALLING)
+		stm_exti.ftsr |= mask;
+
+	if (pin <= 4)
+		irq = STM_ISR_EXTI0_POS + pin;
+	else if (pin <= 9)
+		irq = STM_ISR_EXTI9_5_POS;
+	else
+		irq = STM_ISR_EXTI15_10_POS;
+	stm_nvic_set_priority(irq, 10);
+	stm_nvic_set_enable(irq);
+}
+
+void
+ao_exti_enable(struct stm_gpio *gpio, uint8_t pin) {
+	stm_exti.imr |= (1 << pin);
+}
+
+void
+ao_exti_disable(struct stm_gpio *gpio, uint8_t pin) {
+	stm_exti.imr &= ~(1 << pin);
+}
+
+void
+ao_exti_init(void)
+{
+	stm_nvic_set_priority(STM_ISR_EXTI1_POS, 10);
+	stm_nvic_set_priority(STM_ISR_EXTI2_POS, 10);
+	stm_nvic_set_priority(STM_ISR_EXTI3_POS, 10);
+	stm_nvic_set_priority(STM_ISR_EXTI4_POS, 10);
+	stm_nvic_set_priority(STM_ISR_EXTI9_5_POS, 10);
+	stm_nvic_set_priority(STM_ISR_EXTI15_10_POS, 10);
+}