Pr 16bit addressing support

[viorz]

TMS320 have 16-bits addressing, so

1. (uint8_t) same (uint16_t)
2. sizeof(float) is 2
3. union not same like STM32, because type uint8_t does not exist in hardware

Example:
union
{
uint64_t u8;
uint64_t u16;
uint64_t u32;
uint64_t u64;
uint8_t bytes[8];
} storage;

 address:|   bytes:        |   u64:                      |   u32:                       |   u16:    |   u8:
 0x00      |   bytes[0]    |   (u64         )&0xFF  |   (u32         )&0xFF  |   u16     |   u8
 0x01      |   bytes[1]    |   (u64>>16)&0xFF  |   (u32>>16)&0xFF  |
 0x02      |   bytes[2]    |   (u64>>32)&0xFF  |
 0x03      |   bytes[3]    |   (u64>>48)&0xFF  |
 0x04      |   bytes[4]    |
 0x05      |   bytes[5]    |
 0x06      |   bytes[6]    |
 0x07      |   bytes[7]    |

[tridge]

@viorz thanks for the contribution!
what testing have you done on this?

[tridge]

I've pushed some fixes to try to get CI to pass

[tridge]

@viorz it now builds and passes tests, but please let me know what testing you have done so I can be sure it really works

[tridge]

@viorz any update?

[EMBRMP2]

@viorz have you tested this commit with any TMS320 microcontroller

[tridge]

I believe this will work, and will merge, hopefully someone with this type of MCU will test

[viorz]

I tested it on TMS320F280049 and it work.