p kj / Mbed 2 deprecated LPC824-BlynkWeatherstation

Microduino

Dependencies:   mbed

Fork of Io_moon by Li Weiyi

Blynk_v0_3_7/Blynk/utility/BlynkFifo.h@1:e34100dd6532, 2016-06-24 (annotated)

Committer:
lixianyu
Date:
Fri Jun 24 02:06:43 2016 +0000
Revision:
1:e34100dd6532
Parent:
0:740c1eb2df13 
?Arduino??????????0~255??????LPC824????????????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lixianyu 0:740c1eb2df13 1 /**
lixianyu 0:740c1eb2df13 2 * @file BlynkFifo.h
lixianyu 0:740c1eb2df13 3 * @author Volodymyr Shymanskyy
lixianyu 0:740c1eb2df13 4 * @license This project is released under the MIT License (MIT)
lixianyu 0:740c1eb2df13 5 * @copyright Copyright (c) 2015 Volodymyr Shymanskyy
lixianyu 0:740c1eb2df13 6 * @date Feb 2015
lixianyu 0:740c1eb2df13 7 * @brief FIFO implementation
lixianyu 0:740c1eb2df13 8 *
lixianyu 0:740c1eb2df13 9 */
lixianyu 0:740c1eb2df13 10
lixianyu 0:740c1eb2df13 11 #ifndef BlynkFifo_h
lixianyu 0:740c1eb2df13 12 #define BlynkFifo_h
lixianyu 0:740c1eb2df13 13
lixianyu 0:740c1eb2df13 14 #include <utility/BlynkUtility.h>
lixianyu 0:740c1eb2df13 15
lixianyu 0:740c1eb2df13 16 template<typename T, unsigned SIZE>
lixianyu 0:740c1eb2df13 17 class BlynkFifo {
lixianyu 0:740c1eb2df13 18
lixianyu 0:740c1eb2df13 19 BlynkFifo(const BlynkFifo<T, SIZE> & rb);
lixianyu 0:740c1eb2df13 20
lixianyu 0:740c1eb2df13 21 public:
lixianyu 0:740c1eb2df13 22
lixianyu 0:740c1eb2df13 23 BlynkFifo() : fst(0), lst(0), flag(0) {}
lixianyu 0:740c1eb2df13 24 ~BlynkFifo() {}
lixianyu 0:740c1eb2df13 25
lixianyu 0:740c1eb2df13 26 void clear() {
lixianyu 0:740c1eb2df13 27 fst = 0;
lixianyu 0:740c1eb2df13 28 lst = 0;
lixianyu 0:740c1eb2df13 29 flag = 0;
lixianyu 0:740c1eb2df13 30 }
lixianyu 0:740c1eb2df13 31
lixianyu 0:740c1eb2df13 32 size_t write(const T* data, size_t n)
lixianyu 0:740c1eb2df13 33 {
lixianyu 0:740c1eb2df13 34 if ((n = BlynkMin(n, getFree()))) {
lixianyu 0:740c1eb2df13 35 const size_t ch1 = BlynkMin(n, SIZE - lst);
lixianyu 0:740c1eb2df13 36 memcpy(buffer + lst, data, ch1 * sizeof(T));
lixianyu 0:740c1eb2df13 37 lst = (lst + ch1) % SIZE;
lixianyu 0:740c1eb2df13 38
lixianyu 0:740c1eb2df13 39 if (ch1 < n) {
lixianyu 0:740c1eb2df13 40 const size_t ch2 = n - ch1;
lixianyu 0:740c1eb2df13 41 memcpy(buffer + lst, data + ch1, ch2 * sizeof(T));
lixianyu 0:740c1eb2df13 42 lst = (lst + ch2) % SIZE;
lixianyu 0:740c1eb2df13 43 }
lixianyu 0:740c1eb2df13 44
lixianyu 0:740c1eb2df13 45 if (fst == lst) {
lixianyu 0:740c1eb2df13 46 flag = 1;
lixianyu 0:740c1eb2df13 47 }
lixianyu 0:740c1eb2df13 48 }
lixianyu 0:740c1eb2df13 49 return n;
lixianyu 0:740c1eb2df13 50 }
lixianyu 0:740c1eb2df13 51
lixianyu 0:740c1eb2df13 52 size_t read(T* dest, size_t n)
lixianyu 0:740c1eb2df13 53 {
lixianyu 0:740c1eb2df13 54 if ((n = BlynkMin(n, getOccupied()))) {
lixianyu 0:740c1eb2df13 55 flag = 0;
lixianyu 0:740c1eb2df13 56
lixianyu 0:740c1eb2df13 57 const size_t ch1 = BlynkMin(n, SIZE - fst);
lixianyu 0:740c1eb2df13 58 memcpy(dest, buffer + fst, ch1 * sizeof(T));
lixianyu 0:740c1eb2df13 59 fst = (fst + ch1) % SIZE;
lixianyu 0:740c1eb2df13 60
lixianyu 0:740c1eb2df13 61 if (ch1 < n) {
lixianyu 0:740c1eb2df13 62 const size_t ch2 = n - ch1;
lixianyu 0:740c1eb2df13 63 memcpy(dest + ch1, buffer + fst, ch2 * sizeof(T));
lixianyu 0:740c1eb2df13 64 fst = (fst + ch2) % SIZE;
lixianyu 0:740c1eb2df13 65 }
lixianyu 0:740c1eb2df13 66 }
lixianyu 0:740c1eb2df13 67 return n;
lixianyu 0:740c1eb2df13 68 }
lixianyu 0:740c1eb2df13 69
lixianyu 0:740c1eb2df13 70 void dump(void)
lixianyu 0:740c1eb2df13 71 {
lixianyu 0:740c1eb2df13 72 for (int i = fst; i < lst; i++) {
lixianyu 0:740c1eb2df13 73 pc.printf("0x%02X ", buffer[i]);
lixianyu 0:740c1eb2df13 74 if (i % 16 == 0) {
lixianyu 0:740c1eb2df13 75 pc.printf("\r\n");
lixianyu 0:740c1eb2df13 76 }
lixianyu 0:740c1eb2df13 77 }
lixianyu 0:740c1eb2df13 78 }
lixianyu 0:740c1eb2df13 79
lixianyu 0:740c1eb2df13 80 bool push(const T& data) {
lixianyu 0:740c1eb2df13 81 return write(&data, 1) == 1;
lixianyu 0:740c1eb2df13 82 }
lixianyu 0:740c1eb2df13 83
lixianyu 0:740c1eb2df13 84 size_t getOccupied() const {
lixianyu 0:740c1eb2df13 85 if (lst == fst) {
lixianyu 0:740c1eb2df13 86 return flag ? SIZE : 0;
lixianyu 0:740c1eb2df13 87 } else if (lst > fst) {
lixianyu 0:740c1eb2df13 88 return lst - fst;
lixianyu 0:740c1eb2df13 89 } else {
lixianyu 0:740c1eb2df13 90 return SIZE + lst - fst;
lixianyu 0:740c1eb2df13 91 }
lixianyu 0:740c1eb2df13 92 }
lixianyu 0:740c1eb2df13 93
lixianyu 0:740c1eb2df13 94 size_t getFree() const {
lixianyu 0:740c1eb2df13 95 return SIZE - getOccupied();
lixianyu 0:740c1eb2df13 96 }
lixianyu 0:740c1eb2df13 97
lixianyu 0:740c1eb2df13 98 private:
lixianyu 0:740c1eb2df13 99 T buffer[SIZE];
lixianyu 0:740c1eb2df13 100 size_t fst;
lixianyu 0:740c1eb2df13 101 size_t lst;
lixianyu 0:740c1eb2df13 102 uint8_t flag;
lixianyu 0:740c1eb2df13 103 };
lixianyu 0:740c1eb2df13 104
lixianyu 0:740c1eb2df13 105 #endif
lixianyu 0:740c1eb2df13 106