I2C changes for the K64F

Fixed also here single byte read (probably)

Author: Sissors

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KSDK_MCUS/TARGET_K64F/i2c_api.c

@@ -44,8 +44,6 @@ static const PinMap PinMap_I2C_SCL[] = {
     {NC   , NC   , 0}
 };
 
-static uint8_t first_read;
-
 void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
     uint32_t i2c_sda = pinmap_peripheral(sda, PinMap_I2C_SDA);
     uint32_t i2c_scl = pinmap_peripheral(scl, PinMap_I2C_SCL);
@@ -60,12 +58,10 @@ void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
 
     pinmap_pinout(sda, PinMap_I2C_SDA);
     pinmap_pinout(scl, PinMap_I2C_SCL);
-    first_read = 1;
 }
 
 int i2c_start(i2c_t *obj) {
     i2c_hal_send_start(obj->instance);
-    first_read = 1;
     return 0;
 }
 
@@ -78,7 +74,6 @@ int i2c_stop(i2c_t *obj) {
     // This wait is also included on the samples
     // code provided with the freedom board
     for (n = 0; n < 100; n++) __NOP();
-    first_read = 1;
     return 0;
 }
 
@@ -229,26 +224,15 @@ int i2c_byte_read(i2c_t *obj, int last) {
     // set rx mode
     i2c_hal_set_direction(obj->instance, kI2CReceive);
 
-    if(first_read) {
-        // first dummy read
-        i2c_do_read(obj, &data, 0);
-        first_read = 0;
-    }
-
-    if (last) {
-        // set tx mode
-        i2c_hal_set_direction(obj->instance, kI2CTransmit);
-        return i2c_hal_read(obj->instance);
-    }
-
+    // Setup read
     i2c_do_read(obj, &data, last);
 
-    return data;
+    // set tx mode
+    i2c_hal_set_direction(obj->instance, kI2CTransmit);
+    return i2c_hal_read(obj->instance);
 }
 
 int i2c_byte_write(i2c_t *obj, int data) {
-    first_read = 1;
-
     // set tx mode
     i2c_hal_set_direction(obj->instance, kI2CTransmit);