X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=boards%2Fstm32-p103%2Fhw%2Fhw_i2c_bitbang.h;h=a5aea90acb96d2509bf2252d26f31b6941923268;hb=b9e1e52093d33494bf4a8ca27c14a56a25b6e0bc;hp=4822af7c81462edea4647179aa79f75e0513df2e;hpb=a256e501c16b63a423267f8621d6bdcda20d3f3a;p=bertos.git

diff --git a/boards/stm32-p103/hw/hw_i2c_bitbang.h b/boards/stm32-p103/hw/hw_i2c_bitbang.h
index 4822af7c..a5aea90a 100644
--- a/boards/stm32-p103/hw/hw_i2c_bitbang.h
+++ b/boards/stm32-p103/hw/hw_i2c_bitbang.h
@@ -34,7 +34,6 @@
  * \brief Macro for I2C bitbang operation.
  *
  *
- * \version $Id$
  *
  * \author Francesco Sacchi <batt@develer.com>
  */
@@ -42,25 +41,116 @@
 #ifndef HW_I2C_BITBANG_H
 #define HW_I2C_BITBANG_H
 
-#warning TODO:This is an example implementation, you must implement it!
+#include <cfg/macros.h>
 
-#define SDA_HI  do { /* Implement me:Set SDA High by setting SDA pin as input */ } while (0)
-#define SDA_LO  do { /* Implement me:Set SDA Low by setting SDA pin as open collector output */ } while (0)
-#define SCL_HI  do { /* Implement me:Set SCL High by setting SCL pin as input */ } while (0)
-#define SCL_LO  do { /* Implement me:Set SCL Low by setting SCL pin as open collector output */ } while (0)
+#include <io/stm32.h>
 
+#include <drv/timer.h>
+#include <drv/gpio_stm32.h>
+#include <drv/clock_stm32.h>
 
-#define SCL_IN       (true) /* Implement me: read SDA pin state */
-#define SDA_IN       (true) /* Implement me: read SCL pin state */
+#define SDA_PIN   BV(0)
+#define SCL_PIN   BV(1)
+
+#define SDA_HI \
+			stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ)
+
+#define SDA_LO \
+			stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN, GPIO_MODE_OUT_PP, GPIO_SPEED_50MHZ)
+
+#define SCL_HI \
+			stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SCL_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ)
+
+#define SCL_LO \
+			stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SCL_PIN, GPIO_MODE_OUT_PP, GPIO_SPEED_50MHZ)
+
+
+#define SCL_IN \
+		({ \
+			(stm32_gpioPinRead((struct stm32_gpio *)GPIOB_BASE, SCL_PIN)); \
+		})
+
+#define SDA_IN \
+		({ \
+			(stm32_gpioPinRead((struct stm32_gpio *)GPIOB_BASE, SDA_PIN)); \
+		})
 
 /**
  * This macro should set SDA and SCL lines as input.
  */
-#define I2C_BITBANG_HW_INIT do { /* Implement me! */ } while (0)
+#define I2C_BITBANG_HW_INIT \
+	do { \
+		RCC->APB2ENR |= RCC_APB2_GPIOB; \
+		stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN | SCL_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ); \
+	} while (0)
+
+/**
+ * Half bit delay routine used to generate the correct timings.
+ */
+#define I2C_HALFBIT_DELAY() \
+	do { \
+	timer_delay(1); \
+	} while (0)
+
+
+/*
+ * New api
+ */
+#include <cfg/compiler.h>
+
+INLINE void i2c_sdaHi(int dev)
+{
+	(void)(dev);
+	stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ);
+}
+
+INLINE void i2c_sdaLo(int dev)
+{
+	(void)(dev);
+	stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN, GPIO_MODE_OUT_PP, GPIO_SPEED_50MHZ);
+}
+
+INLINE void i2c_sclHi(int dev)
+{
+	(void)(dev);
+	stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SCL_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ);
+}
+
+INLINE void i2c_sclLo(int dev)
+{
+	(void)(dev);
+	stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SCL_PIN, GPIO_MODE_OUT_PP, GPIO_SPEED_50MHZ);
+}
+
+INLINE bool i2c_sdaIn(int dev)
+{
+	(void)(dev);
+	return stm32_gpioPinRead((struct stm32_gpio *)GPIOB_BASE, SDA_PIN);
+}
+
+INLINE bool i2c_sclIn(int dev)
+{
+	(void)(dev);
+	return stm32_gpioPinRead((struct stm32_gpio *)GPIOB_BASE, SCL_PIN);
+}
 
 /**
  * Half bit delay routine used to generate the correct timings.
  */
-#define I2C_HALFBIT_DELAY() do { /* Implement me! */ } while (0)
+INLINE void i2c_halfbitDelay(int dev)
+{
+	(void)(dev);
+	timer_udelay(1);
+}
+
+/**
+ * This macro should set SDA and SCL lines as input.
+ */
+INLINE void i2c_bitbangInit(int dev)
+{
+	(void)(dev);
+	RCC->APB2ENR |= RCC_APB2_GPIOB;
+	stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, SDA_PIN | SCL_PIN, GPIO_MODE_IN_FLOATING, GPIO_SPEED_50MHZ);
+}
 
 #endif /* HW_I2C_BITBANG_H */