From 6171892fa32e8a662a494ec6ba28a82fddc68589 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Mon, 6 Aug 2012 19:33:44 -0700
Subject: [PATCH 1/1] altos: Add ao_gpio_get and ao_exti_set_mode

Needed to support general GPIO interrupts

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/stm/ao_arch_funcs.h | 13 +++++++++++++
 src/stm/ao_exti.h       |  3 +++
 src/stm/ao_exti_stm.c   | 14 ++++++++++++++
 src/stm/stm32l.h        |  2 +-
 4 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h
index d2c973f5..3d8ca1f2 100644
--- a/src/stm/ao_arch_funcs.h
+++ b/src/stm/ao_arch_funcs.h
@@ -78,12 +78,25 @@ ao_spi_init(void);
 
 #define ao_gpio_set(port, bit, pin, v) stm_gpio_set(port, bit, v)
 
+#define ao_gpio_get(port, bit, pin) stm_gpio_get(port, bit)
+
 #define ao_enable_output(port,bit,pin,v) do {			\
 		ao_enable_port(port);				\
 		ao_gpio_set(port, bit, pin, v);			\
 		stm_moder_set(port, bit, STM_MODER_OUTPUT);\
 	} while (0)
 
+#define ao_enable_input(port,bit,mode) do {				\
+		ao_enable_port(port);					\
+		stm_moder_set(port, bit, STM_MODER_INPUT);		\
+		if (mode == AO_EXTI_MODE_PULL_UP)			\
+			stm_pupdr_set(port, bit, STM_PUPDR_PULL_UP);	\
+		else if (mode == AO_EXTI_MODE_PULL_DOWN)		\
+			stm_pupdr_set(port, bit, STM_PUPDR_PULL_DOWN);	\
+		else							\
+			stm_pupdr_set(port, bit, STM_PUPDR_NONE);	\
+	} while (0)
+
 #define ao_enable_cs(port,bit) do {				\
 		stm_gpio_set((port), bit, 1);			\
 		stm_moder_set((port), bit, STM_MODER_OUTPUT);	\
diff --git a/src/stm/ao_exti.h b/src/stm/ao_exti.h
index b579ad9f..35b56b57 100644
--- a/src/stm/ao_exti.h
+++ b/src/stm/ao_exti.h
@@ -29,6 +29,9 @@
 void
 ao_exti_setup(struct stm_gpio *gpio, uint8_t pin, uint8_t mode, void (*callback)());
 
+void
+ao_exti_set_mode(struct stm_gpio *gpio, uint8_t pin, uint8_t mode);
+
 void
 ao_exti_set_callback(struct stm_gpio *gpio, uint8_t pin, void (*callback)());
 
diff --git a/src/stm/ao_exti_stm.c b/src/stm/ao_exti_stm.c
index d54e6ee6..11099b02 100644
--- a/src/stm/ao_exti_stm.c
+++ b/src/stm/ao_exti_stm.c
@@ -115,6 +115,20 @@ ao_exti_setup (struct stm_gpio *gpio, uint8_t pin, uint8_t mode, void (*callback
 	stm_nvic_set_enable(irq);
 }
 
+void
+ao_exti_set_mode(struct stm_gpio *gpio, uint8_t pin, uint8_t mode) {
+	uint32_t	mask = 1 << pin;
+	
+	if (mode & AO_EXTI_MODE_RISING)
+		stm_exti.rtsr |= mask;
+	else
+		stm_exti.rtsr &= ~mask;
+	if (mode & AO_EXTI_MODE_FALLING)
+		stm_exti.ftsr |= mask;
+	else
+		stm_exti.ftsr &= ~mask;
+}
+
 void
 ao_exti_set_callback(struct stm_gpio *gpio, uint8_t pin, void (*callback)()) {
 	ao_exti_callback[pin] = callback;
diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 4d665e8b..3a498a0a 100644
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -167,7 +167,7 @@ stm_gpio_set(struct stm_gpio *gpio, int pin, uint8_t value) {
 }
 
 static inline uint8_t
-stm_gpio_isset(struct stm_gpio *gpio, int pin) {
+stm_gpio_get(struct stm_gpio *gpio, int pin) {
 	return (gpio->idr >> pin) & 1;
 }
 
-- 
2.30.2