Do not automatically add software i2c bus

Author: Wu Han

port/i2c_soft_init.c

@@ -15,6 +15,9 @@ void stm32_set_sda(void *data, rt_int32_t state)
         GPIO_ResetBits(I2C1_GPIO , I2C1_GPIO_SDA); //GPIOB->BSRRH = I2C1_GPIO_SDA
 		// rt_pin_write(I2C1_GPIO_SDA,PIN_LOW);
     #endif
+
+    // If you are going to use software I2C, implement here
+
 }
 
 void stm32_set_scl(void *data, rt_int32_t state)
@@ -28,86 +31,109 @@ void stm32_set_scl(void *data, rt_int32_t state)
         GPIO_ResetBits(I2C1_GPIO , I2C1_GPIO_SCL); //GPIOB->BSRRH = I2C1_GPIO_SCL
 		// rt_pin_write(I2C1_GPIO_SCL,PIN_LOW);
     #endif
+
+    // If you are going to use software I2C, implement here
+
 }
 
 rt_int32_t stm32_get_sda(void *data)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-    return (rt_int32_t)GPIO_ReadInputDataBit(I2C1_GPIO , I2C1_GPIO_SDA);//return(GPIOB->IDR  & I2C1_GPIO_SDA)
+        return (rt_int32_t)GPIO_ReadInputDataBit(I2C1_GPIO , I2C1_GPIO_SDA);//return(GPIOB->IDR  & I2C1_GPIO_SDA)
 	#endif
     // return rt_pin_read(I2C1_GPIO_SDA);
+
+    // If you are going to use software I2C, implement here
+
 }
 
 rt_int32_t stm32_get_scl(void *data)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-    return (rt_int32_t)GPIO_ReadInputDataBit(I2C1_GPIO , I2C1_GPIO_SCL);//return(GPIOB->IDR  & I2C1_GPIO_SCL)
+        return (rt_int32_t)GPIO_ReadInputDataBit(I2C1_GPIO , I2C1_GPIO_SCL);//return(GPIOB->IDR  & I2C1_GPIO_SCL)
 	#endif
     // return rt_pin_read(I2C1_GPIO_SCL);
+
+    // If you are going to use software I2C, implement here
+
 }
 
 void stm32_udelay(rt_uint32_t us)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-    rt_uint32_t delta;
-    /* sysTick->LOAD=21000, RT_TICK_PER_SECOND=1000 */
-    us = us * (SysTick->LOAD/(1000000/RT_TICK_PER_SECOND));
-    delta = SysTick->VAL;
-    /* delay us */
-    while (delta - SysTick->VAL< us);
+        rt_uint32_t delta;
+        /* sysTick->LOAD=21000, RT_TICK_PER_SECOND=1000 */
+        us = us * (SysTick->LOAD/(1000000/RT_TICK_PER_SECOND));
+        delta = SysTick->VAL;
+        /* delay us */
+        while (delta - SysTick->VAL< us);
     #endif
+
+    // If you are going to use software I2C, implement here
+
 }
 
 void stm32_mdelay(rt_uint32_t ms)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-    stm32_udelay(ms * 1000);
+        stm32_udelay(ms * 1000);
     #endif
+
+    // If you are going to use software I2C, implement here
+
 }
 
 static const struct  rt_i2c_bit_ops stm32_i2c_bit_ops =
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-    (void*)0xaa,     //no use in set_sda,set_scl,get_sda,get_scl
-    stm32_set_sda,
-    stm32_set_scl,
-    stm32_get_sda,
-    stm32_get_scl,
-    stm32_udelay,
-    20,
+        (void*)0xaa,     //no use in set_sda,set_scl,get_sda,get_scl
+        stm32_set_sda,
+        stm32_set_scl,
+        stm32_get_sda,
+        stm32_get_scl,
+        stm32_udelay,
+        20,
     #endif 
+
+    // If you are going to use software I2C, implement here
+
 };
 
 static void RCC_Configuration(void)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-	RCC->APB2ENR|=1<<4;
-	RCC_APB2PeriphClockCmd( RCC_I2C, ENABLE );
+	   RCC->APB2ENR|=1<<4;
+	   RCC_APB2PeriphClockCmd( RCC_I2C, ENABLE );
     #endif
+
+    // If you are going to use software I2C, implement here
+
 }
 
 
 static void GPIO_Configuration(void)
 {
     // examples for STM32F103x
     #ifdef SOC_STM32F1
-	GPIO_InitTypeDef GPIO_InitStructure;
-	GPIO_InitStructure.GPIO_Pin = I2C1_GPIO_SDA | I2C1_GPIO_SCL;
-	GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_OD ;
-	GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
+    	GPIO_InitTypeDef GPIO_InitStructure;
+    	GPIO_InitStructure.GPIO_Pin = I2C1_GPIO_SDA | I2C1_GPIO_SCL;
+    	GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_OD ;
+    	GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
 
-	GPIO_Init(I2C1_GPIO, &GPIO_InitStructure);
+    	GPIO_Init(I2C1_GPIO, &GPIO_InitStructure);
 	#endif
 
 	// rt_pin_mode(I2C1_GPIO_SDA, PIN_MODE_OUTPUT_OD);
 	// rt_pin_mode(I2C1_GPIO_SCL, PIN_MODE_OUTPUT_OD);
 
+    // If you are going to use software I2C, implement here
+
 }
 
 int rt_hw_i2c_init(void)
@@ -123,5 +149,8 @@ int rt_hw_i2c_init(void)
 
     return 0;
 }
-INIT_BOARD_EXPORT(rt_hw_i2c_init);	
-//rt_hw_i2c_init will be called in rt_components_board_init()
+
+#ifdef SOC_STM32F1
+    // rt_hw_i2c_init will be called in rt_components_board_init()
+    INIT_BOARD_EXPORT(rt_hw_i2c_init);  
+#endif

port/i2c_soft_init.h

@@ -5,8 +5,8 @@
 #include <rtdevice.h>
 #include <drivers/i2c-bit-ops.h>
 
-#define RCC_I2C 				RCC_APB2Periph_GPIOB
-#define I2C1_GPIO 			GPIOB
+#define RCC_I2C 		RCC_APB2Periph_GPIOB
+#define I2C1_GPIO 		GPIOB
 #define I2C1_GPIO_SDA 	GPIO_Pin_7
 #define I2C1_GPIO_SCL 	GPIO_Pin_6
 

port/u8g_port.c

@@ -34,21 +34,21 @@ uint8_t u8x8_byte_rt_hw_i2c(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *ar
 	/* u8g2/u8x8 will never send more than 32 bytes between START_TRANSFER and END_TRANSFER */
 	struct rt_i2c_msg msgs;
 	static uint8_t buffer[32];		
-  static uint8_t buf_idx;
-  uint8_t *data;
+  	static uint8_t buf_idx;
+  	uint8_t *data;
 
 
 	rt_uint8_t t = 0;	
 	switch(msg)
 	{
 		case U8X8_MSG_BYTE_SEND:
 			data = (uint8_t *)arg_ptr;      
-      while( arg_int > 0 )
-      {
+	      	while( arg_int > 0 )
+	      	{
 				buffer[buf_idx++] = *data;
 				data++;
 				arg_int--;
-      }
+	      	}
 			break;
 		case U8X8_MSG_BYTE_INIT:
 			i2c_bus = rt_i2c_bus_device_find(I2C_DEVICE_NAME);
@@ -62,7 +62,7 @@ uint8_t u8x8_byte_rt_hw_i2c(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *ar
 			break;
 		case U8X8_MSG_BYTE_END_TRANSFER:
 			// I2C Data Transfer
-		  msgs.addr = u8x8_GetI2CAddress(u8x8)>>1;
+		  	msgs.addr = u8x8_GetI2CAddress(u8x8)>>1;
 			msgs.flags = RT_I2C_WR;
 			msgs.buf = buffer;
 			msgs.len = buf_idx;