Wim Huiskamp / Mbed 2 deprecated MCP_test

Example of how to use the library for the MCP23017 16 bit expander port for I2C.

Dependencies:   mbed

main.cpp@0:88d87b1c1f8b, 2010-12-18 (annotated)

Committer:
wim
Date:
Sat Dec 18 19:44:49 2010 +0000
Revision:
0:88d87b1c1f8b
Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wim 0:88d87b1c1f8b 1 #include "mbed.h"
wim 0:88d87b1c1f8b 2 #include "MCP23017.h"
wim 0:88d87b1c1f8b 3
wim 0:88d87b1c1f8b 4 DigitalOut myled1(LED1);
wim 0:88d87b1c1f8b 5 DigitalOut myled2(LED2);
wim 0:88d87b1c1f8b 6
wim 0:88d87b1c1f8b 7 Serial pc(USBTX, USBRX);
wim 0:88d87b1c1f8b 8 I2C i2c(p9, p10);
wim 0:88d87b1c1f8b 9
wim 0:88d87b1c1f8b 10 MCP23017 mcp23017 = MCP23017(i2c, 0x40);
wim 0:88d87b1c1f8b 11
wim 0:88d87b1c1f8b 12 int main() {
wim 0:88d87b1c1f8b 13
wim 0:88d87b1c1f8b 14 pc.printf("Hello World\n");
wim 0:88d87b1c1f8b 15
wim 0:88d87b1c1f8b 16 // I2C init
wim 0:88d87b1c1f8b 17 i2c.frequency(100000);
wim 0:88d87b1c1f8b 18
wim 0:88d87b1c1f8b 19 // Port A is databus - Output
wim 0:88d87b1c1f8b 20 mcp23017.direction(PORT_A, PORT_DIR_OUT);
wim 0:88d87b1c1f8b 21 // Port B is controlbus - Output
wim 0:88d87b1c1f8b 22 mcp23017.direction(PORT_B, PORT_DIR_OUT);
wim 0:88d87b1c1f8b 23
wim 0:88d87b1c1f8b 24 myled2 = 1;
wim 0:88d87b1c1f8b 25 pc.printf("MPC Init done\n");
wim 0:88d87b1c1f8b 26
wim 0:88d87b1c1f8b 27 while(1) {
wim 0:88d87b1c1f8b 28 myled1 = 1;
wim 0:88d87b1c1f8b 29 mcp23017.write(PORT_A, 0xFF);
wim 0:88d87b1c1f8b 30 mcp23017.write(PORT_B, 0xFF);
wim 0:88d87b1c1f8b 31 wait(0.2);
wim 0:88d87b1c1f8b 32
wim 0:88d87b1c1f8b 33 myled1 = 0;
wim 0:88d87b1c1f8b 34 mcp23017.write(PORT_A, 0x00);
wim 0:88d87b1c1f8b 35 mcp23017.write(PORT_B, 0x00);
wim 0:88d87b1c1f8b 36 wait(0.2);
wim 0:88d87b1c1f8b 37 pc.printf("*");
wim 0:88d87b1c1f8b 38 }
wim 0:88d87b1c1f8b 39 }