Bayley Wang / Mbed 2 deprecated SerialBlockTransfer

demo block-based serial transfer

Dependencies:   mbed

main.cpp@0:0d85b515c87d, 2018-01-29 (annotated)

Committer:
bwang
Date:
Mon Jan 29 10:49:38 2018 +0000
Revision:
0:0d85b515c87d
demo;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bwang 0:0d85b515c87d 1 #include "mbed.h"
bwang 0:0d85b515c87d 2
bwang 0:0d85b515c87d 3 #define PAGE_SIZE 4096
bwang 0:0d85b515c87d 4 #define HEADER_SIZE 10
bwang 0:0d85b515c87d 5 #define PACKET_SIZE 8
bwang 0:0d85b515c87d 6 #define BAUD_RATE 921600
bwang 0:0d85b515c87d 7 #define F_SW 5000.0f
bwang 0:0d85b515c87d 8
bwang 0:0d85b515c87d 9 #define clip(a) if ((a > 254)) a = 254
bwang 0:0d85b515c87d 10
bwang 0:0d85b515c87d 11 Serial serial4(A0, A1);
bwang 0:0d85b515c87d 12 Ticker tick;
bwang 0:0d85b515c87d 13 DigitalOut test(PC_8);
bwang 0:0d85b515c87d 14 DigitalOut test2(PC_6);
bwang 0:0d85b515c87d 15 DigitalOut led(LED1);
bwang 0:0d85b515c87d 16
bwang 0:0d85b515c87d 17 int index = 0;
bwang 0:0d85b515c87d 18 char *front, *back, *tmp;
bwang 0:0d85b515c87d 19 char buf1[PAGE_SIZE], buf2[PAGE_SIZE];
bwang 0:0d85b515c87d 20
bwang 0:0d85b515c87d 21 unsigned char a = 0, b = 32, c = 64, d = 96, e = 128, f = 160, g = 192, h = 224;
bwang 0:0d85b515c87d 22 void tic() {
bwang 0:0d85b515c87d 23 test = 1;
bwang 0:0d85b515c87d 24 volatile int x;
bwang 0:0d85b515c87d 25 for (x = 0; x < 1000; x++) {
bwang 0:0d85b515c87d 26 }
bwang 0:0d85b515c87d 27 front[index] = 0xff;
bwang 0:0d85b515c87d 28 front[index+1] = a++;
bwang 0:0d85b515c87d 29 front[index+2] = b++;
bwang 0:0d85b515c87d 30 front[index+3] = c++;
bwang 0:0d85b515c87d 31 front[index+4] = d++;
bwang 0:0d85b515c87d 32 front[index+5] = e++;
bwang 0:0d85b515c87d 33 front[index+6] = f++;
bwang 0:0d85b515c87d 34 front[index+7] = g++;
bwang 0:0d85b515c87d 35 front[index+8] = h++;
bwang 0:0d85b515c87d 36 if (a == 0xff) a = 0;
bwang 0:0d85b515c87d 37 if (b == 0xff) b = 0;
bwang 0:0d85b515c87d 38 if (c == 0xff) c = 0;
bwang 0:0d85b515c87d 39 if (d == 0xff) d = 0;
bwang 0:0d85b515c87d 40 if (e == 0xff) e = 0;
bwang 0:0d85b515c87d 41 if (f == 0xff) f = 0;
bwang 0:0d85b515c87d 42 if (g == 0xff) g = 0;
bwang 0:0d85b515c87d 43 if (h == 0xff) h = 0;
bwang 0:0d85b515c87d 44 index += PACKET_SIZE+1;
bwang 0:0d85b515c87d 45 test = 0;
bwang 0:0d85b515c87d 46 }
bwang 0:0d85b515c87d 47
bwang 0:0d85b515c87d 48 int main() {
bwang 0:0d85b515c87d 49 front = buf1;
bwang 0:0d85b515c87d 50 back = buf2;
bwang 0:0d85b515c87d 51
bwang 0:0d85b515c87d 52 serial4.baud(BAUD_RATE);
bwang 0:0d85b515c87d 53 tick.attach(tic, 1/F_SW);
bwang 0:0d85b515c87d 54
bwang 0:0d85b515c87d 55 for (;;) {
bwang 0:0d85b515c87d 56 if (index == PAGE_SIZE-HEADER_SIZE) {
bwang 0:0d85b515c87d 57 test2 = 1;
bwang 0:0d85b515c87d 58 led = 1;
bwang 0:0d85b515c87d 59 index = 0;
bwang 0:0d85b515c87d 60 tmp = front;
bwang 0:0d85b515c87d 61 front = back;
bwang 0:0d85b515c87d 62 back = tmp;
bwang 0:0d85b515c87d 63 for (int i = 0; i < PAGE_SIZE-HEADER_SIZE; i++) serial4.putc(back[i]);
bwang 0:0d85b515c87d 64 led = 0;
bwang 0:0d85b515c87d 65 test2 = 0;
bwang 0:0d85b515c87d 66 }
bwang 0:0d85b515c87d 67 }
bwang 0:0d85b515c87d 68 }