Daisuke Yanagihara / Mbed 2 deprecated ref_spi_simplest_master

v2

Dependencies:   mbed

spi_master.cpp@4:e86f33d05627, 2021-01-08 (annotated)

Committer:
Yanagihara
Date:
Fri Jan 08 08:04:52 2021 +0000
Revision:
4:e86f33d05627
Parent:
3:894278e5d918 
v3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
taiga_prelude 0:382b3838a100 1 #include "mbed.h"
taiga_prelude 0:382b3838a100 2
taiga_prelude 0:382b3838a100 3 SPI to_eps(p5,p6,p7);
taiga_prelude 0:382b3838a100 4 DigitalOut cs(p8);
taiga_prelude 0:382b3838a100 5
taiga_prelude 0:382b3838a100 6 Serial pc(USBTX,USBRX);
taiga_prelude 0:382b3838a100 7
taiga_prelude 0:382b3838a100 8 #define DTIME 0.1
taiga_prelude 0:382b3838a100 9
taiga_prelude 0:382b3838a100 10 int main()
taiga_prelude 0:382b3838a100 11 {
taiga_prelude 0:382b3838a100 12 pc.printf("--Hi,this is cdh(master).\r\n");
taiga_prelude 0:382b3838a100 13 cs = 1;
taiga_prelude 0:382b3838a100 14
Yanagihara 2:6d9572f5523e 15 to_eps.format(8,3);
taiga_prelude 0:382b3838a100 16 to_eps.frequency(1000000);
Yanagihara 3:894278e5d918 17
Yanagihara 3:894278e5d918 18 int sdummy = 0xFF; //2nd frame
taiga_prelude 0:382b3838a100 19
taiga_prelude 0:382b3838a100 20 while(1) {
taiga_prelude 0:382b3838a100 21 char c = pc.getc();
Yanagihara 3:894278e5d918 22 int cmd = c - '0';
Yanagihara 3:894278e5d918 23 pc.printf("cmd: %d, ",cmd); // 2桁も打ち込み可能にしたい // cmdを16進数に直す
Yanagihara 3:894278e5d918 24
Yanagihara 3:894278e5d918 25 // 1st frame (send cmd)
taiga_prelude 0:382b3838a100 26 cs=0;
Yanagihara 3:894278e5d918 27 int rdummy = to_eps.write(cmd); // send command
taiga_prelude 0:382b3838a100 28 cs=1;
Yanagihara 3:894278e5d918 29 pc.printf("rdummy: %x, ",rdummy); // receive "dummy" to slave
Yanagihara 1:5a1355e57aed 30
Yanagihara 3:894278e5d918 31 // 2nd frame (send "dummy" to receive "slave data")
Yanagihara 3:894278e5d918 32 if(cmd == 1){
Yanagihara 1:5a1355e57aed 33 wait(1);
Yanagihara 1:5a1355e57aed 34 cs=0;
Yanagihara 3:894278e5d918 35 int rdata = to_eps.write(sdummy);
Yanagihara 1:5a1355e57aed 36 cs=1;
Yanagihara 3:894278e5d918 37 pc.printf("<--rdata: %x\r\n",rdata);
Yanagihara 1:5a1355e57aed 38 }
Yanagihara 1:5a1355e57aed 39
Yanagihara 4:e86f33d05627 40 // receive 2byte data // (現状:2byteの場合mode=0では不具合が発生→プルアップしていないことが原因の可能性)
Yanagihara 1:5a1355e57aed 41 if(cmd == 2){
Yanagihara 1:5a1355e57aed 42 wait(3);
Yanagihara 1:5a1355e57aed 43 cs=0;
Yanagihara 1:5a1355e57aed 44 int rdata1 = to_eps.write(0x00);
Yanagihara 1:5a1355e57aed 45 int rdata2 = to_eps.write(0x00);
Yanagihara 1:5a1355e57aed 46 cs=1;
Yanagihara 1:5a1355e57aed 47 pc.printf("rdata1: %x\r\n",rdata1);
Yanagihara 1:5a1355e57aed 48 pc.printf("rdata2: %x\r\n",rdata2);
Yanagihara 1:5a1355e57aed 49 }
taiga_prelude 0:382b3838a100 50 }
taiga_prelude 0:382b3838a100 51 }