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UsaPack.cpp@0:8adbff0ff843, 2021-04-23 (annotated)
- Committer:
- cocorlow
- Date:
- Fri Apr 23 18:53:23 2021 +0000
- Revision:
- 0:8adbff0ff843
- Child:
- 1:7d6e751f5986
UART COBS
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| cocorlow | 0:8adbff0ff843 | 1 | #include "UsaPack.hpp" |
| cocorlow | 0:8adbff0ff843 | 2 | #include "mbed.h" |
| cocorlow | 0:8adbff0ff843 | 3 | |
| cocorlow | 0:8adbff0ff843 | 4 | void UsaPack::Receive() |
| cocorlow | 0:8adbff0ff843 | 5 | { |
| cocorlow | 0:8adbff0ff843 | 6 | |
| cocorlow | 0:8adbff0ff843 | 7 | } |
| cocorlow | 0:8adbff0ff843 | 8 | |
| cocorlow | 0:8adbff0ff843 | 9 | UsaPack::UsaPack(PinName tx, PinName rx, int baud) |
| cocorlow | 0:8adbff0ff843 | 10 | :serial(tx, rx, baud), uart_index(0), package_index(0) |
| cocorlow | 0:8adbff0ff843 | 11 | { |
| cocorlow | 0:8adbff0ff843 | 12 | serial.attach(this, &UsaPack::Receive, Serial::RxIrq); |
| cocorlow | 0:8adbff0ff843 | 13 | for (int i = 0; i < uart_size; i++) |
| cocorlow | 0:8adbff0ff843 | 14 | { |
| cocorlow | 0:8adbff0ff843 | 15 | uart_buffer[i] = '\0'; |
| cocorlow | 0:8adbff0ff843 | 16 | } |
| cocorlow | 0:8adbff0ff843 | 17 | } |
| cocorlow | 0:8adbff0ff843 | 18 | |
| cocorlow | 0:8adbff0ff843 | 19 | void UsaPack::CobsEncode(uint8_t data[], int length, uint8_t send_data[]) |
| cocorlow | 0:8adbff0ff843 | 20 | { |
| cocorlow | 0:8adbff0ff843 | 21 | int last_zero = 0; |
| cocorlow | 0:8adbff0ff843 | 22 | for (int i = 0; i < length; i++) |
| cocorlow | 0:8adbff0ff843 | 23 | { |
| cocorlow | 0:8adbff0ff843 | 24 | if (data[i] == 0) |
| cocorlow | 0:8adbff0ff843 | 25 | { |
| cocorlow | 0:8adbff0ff843 | 26 | send_data[last_zero] = i - last_zero + 1; |
| cocorlow | 0:8adbff0ff843 | 27 | last_zero = i + 1; |
| cocorlow | 0:8adbff0ff843 | 28 | } |
| cocorlow | 0:8adbff0ff843 | 29 | else |
| cocorlow | 0:8adbff0ff843 | 30 | { |
| cocorlow | 0:8adbff0ff843 | 31 | send_data[i + 1] = data[i]; |
| cocorlow | 0:8adbff0ff843 | 32 | } |
| cocorlow | 0:8adbff0ff843 | 33 | } |
| cocorlow | 0:8adbff0ff843 | 34 | send_data[last_zero] = length - last_zero + 1; |
| cocorlow | 0:8adbff0ff843 | 35 | send_data[length + 1] = 0; |
| cocorlow | 0:8adbff0ff843 | 36 | } |
| cocorlow | 0:8adbff0ff843 | 37 | |
| cocorlow | 0:8adbff0ff843 | 38 | void UsaPack::CobsDecode(uint8_t receive_data[], int length, uint8_t data[]) |
| cocorlow | 0:8adbff0ff843 | 39 | { |
| cocorlow | 0:8adbff0ff843 | 40 | int next_zero; |
| cocorlow | 0:8adbff0ff843 | 41 | next_zero = receive_data[0] - 1; |
| cocorlow | 0:8adbff0ff843 | 42 | for (int i = 0; i < length; i++) |
| cocorlow | 0:8adbff0ff843 | 43 | { |
| cocorlow | 0:8adbff0ff843 | 44 | data[i] = receive_data[i + 1]; |
| cocorlow | 0:8adbff0ff843 | 45 | } |
| cocorlow | 0:8adbff0ff843 | 46 | while (next_zero < length) |
| cocorlow | 0:8adbff0ff843 | 47 | { |
| cocorlow | 0:8adbff0ff843 | 48 | data[next_zero] = 0; |
| cocorlow | 0:8adbff0ff843 | 49 | next_zero += receive_data[next_zero + 1]; |
| cocorlow | 0:8adbff0ff843 | 50 | } |
| cocorlow | 0:8adbff0ff843 | 51 | } |
| cocorlow | 0:8adbff0ff843 | 52 |