converter: Fix to_hex conversion

[apps/agl-service-can-low-level.git] / low-can-binding / utils / converter.cpp

diff --git a/low-can-binding/utils/converter.cpp b/low-can-binding/utils/converter.cpp
index 5cfc8f5..1d7abde 100644 (file)
--- a/low-can-binding/utils/converter.cpp
+++ b/low-can-binding/utils/converter.cpp
@@ -32,9 +32,8 @@ std::string converter_t::to_hex(const uint8_t data[], const size_t length)
        std::stringstream stream;
        stream << std::hex << std::setfill('0');
        for(int i = 0; i < length; i++)
-       {
-               stream << std::hex << ((int) data[i]);
-       }
+               stream << std::setfill('0') << std::setw(2) << std::hex << ((int) data[i]);
+
        return stream.str();
 }
 
@@ -49,10 +48,47 @@ std::string converter_t::to_hex(const uint8_t data[], const size_t length)
  * @param new_start_bit The first bit of the signal in the frame
  * @param new_end_bit The last bit of the signal in the frame
  */
-void converter_t::signal_to_bits_bytes(uint32_t bit_position, uint32_t bit_size, int &new_start_byte, int &new_end_byte, int &new_start_bit, int &new_end_bit)
+void converter_t::signal_to_bits_bytes(unsigned int bit_position, unsigned int bit_size, int &new_start_byte, int &new_end_byte, uint8_t &new_start_bit, uint8_t &new_end_bit)
 {
        new_start_byte = bit_position >> 3;
        new_start_bit = bit_position % 8;
        new_end_byte = (bit_position + bit_size - 1) >> 3;
        new_end_bit = (bit_position + bit_size - 1) % 8;
-}
\ No newline at end of file
+}
+
+
+/**
+ * @brief      This is to use when you have a big endian CAN frame layout.
+ *                     It converts the bit position so it matches with little endiant CAN frame layout.
+ *
+ * @param bit_position         Original bit position.
+ * @param bit_size             Size of the data.
+ * @return uint32_t    New little endian bit position.
+ */
+uint32_t converter_t::bit_position_swap(uint32_t bit_position,uint32_t bit_size)
+{
+       uint32_t start_byte_position = (uint32_t)(bit_position/8);
+       uint32_t bit_size_rest = bit_size;
+
+       if((int)(bit_size-(8 + start_byte_position*8-bit_position%8))>0)
+       {
+               AFB_ERROR("Error: bit_position and bit_size getting out of range");
+               return bit_position;
+       }
+
+       if(bit_size<=8 && ((bit_position+bit_size)%8==bit_size || (bit_position+bit_size)%8==0))
+       {
+               return (uint32_t)(start_byte_position*8 + (8-bit_size));
+       }
+       else
+       {
+               do
+               {
+                       bit_size_rest = bit_size_rest - ((start_byte_position+1)*8-bit_position);
+                       start_byte_position--;
+                       bit_position = start_byte_position*8;
+               } while (bit_size_rest>8);
+               return (uint32_t)(start_byte_position*8 + (8-bit_size_rest));
+       }
+
+}