Rivian Irvine Team
/
TCTF_Control_Main
Control Code with I/O and ADC working
MCP23008/MCP23008.cpp@7:8a5e65e63e2a, 2018-03-20 (annotated)
- Committer:
- jrodenburg
- Date:
- Tue Mar 20 19:22:55 2018 +0000
- Revision:
- 7:8a5e65e63e2a
- Parent:
- 6:c980535393ed
- Child:
- 9:8cd14861dc63
- Child:
- 12:1cada1fe4743
Code before integrating Huyen's code
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jrodenburg | 0:a28a1035c31b | 1 | #include "mbed.h" |
jrodenburg | 0:a28a1035c31b | 2 | #include "MCP23008.h" |
jrodenburg | 0:a28a1035c31b | 3 | #include "MODSERIAL.h" |
jrodenburg | 0:a28a1035c31b | 4 | |
jrodenburg | 0:a28a1035c31b | 5 | MODSERIAL pc2(USBTX, USBRX); |
jrodenburg | 0:a28a1035c31b | 6 | |
jrodenburg | 0:a28a1035c31b | 7 | namespace { |
jrodenburg | 0:a28a1035c31b | 8 | const uint8_t I2C_WRITE = 0x00; |
jrodenburg | 0:a28a1035c31b | 9 | const uint8_t I2C_READ = 0x01; |
jrodenburg | 0:a28a1035c31b | 10 | |
jrodenburg | 0:a28a1035c31b | 11 | /* MCP23008 registers */ |
jrodenburg | 0:a28a1035c31b | 12 | const uint8_t IODIR = 0x00; |
jrodenburg | 0:a28a1035c31b | 13 | const uint8_t GPIO = 0x09; |
jrodenburg | 5:0f38a0bd4f86 | 14 | const uint8_t PULLUP = 0x06; |
jrodenburg | 0:a28a1035c31b | 15 | |
jrodenburg | 0:a28a1035c31b | 16 | //Channel addresses |
jrodenburg | 0:a28a1035c31b | 17 | const uint8_t CHNL_0 = 0x01; |
jrodenburg | 0:a28a1035c31b | 18 | const uint8_t CHNL_1 = 0x02; |
jrodenburg | 0:a28a1035c31b | 19 | const uint8_t CHNL_2 = 0x04; |
jrodenburg | 0:a28a1035c31b | 20 | const uint8_t CHNL_3 = 0x08; |
jrodenburg | 0:a28a1035c31b | 21 | }; |
jrodenburg | 0:a28a1035c31b | 22 | |
jrodenburg | 0:a28a1035c31b | 23 | MCP23008::MCP23008 (PinName sda, PinName scl, uint8_t address, int freq): i2c( sda, scl ){ |
jrodenburg | 0:a28a1035c31b | 24 | addrI2C = address; |
jrodenburg | 0:a28a1035c31b | 25 | i2c.frequency(freq); |
jrodenburg | 0:a28a1035c31b | 26 | } |
jrodenburg | 0:a28a1035c31b | 27 | |
jrodenburg | 0:a28a1035c31b | 28 | void MCP23008::setAddress(int address){ |
jrodenburg | 0:a28a1035c31b | 29 | addrI2C = address; |
jrodenburg | 0:a28a1035c31b | 30 | } |
jrodenburg | 0:a28a1035c31b | 31 | |
jrodenburg | 1:0182b86f9bd4 | 32 | void MCP23008::writeOutput(int chn1, int chn2, int chn3, int chn4){ |
jrodenburg | 0:a28a1035c31b | 33 | char data[2]; |
jrodenburg | 5:0f38a0bd4f86 | 34 | char data2[2]; |
jrodenburg | 1:0182b86f9bd4 | 35 | uint8_t val = 0x00; |
jrodenburg | 1:0182b86f9bd4 | 36 | |
jrodenburg | 1:0182b86f9bd4 | 37 | //Create mask for all bits that should be on |
jrodenburg | 1:0182b86f9bd4 | 38 | if(chn1) val = val | CHNL_0; |
jrodenburg | 1:0182b86f9bd4 | 39 | if(chn2) val = val | CHNL_1; |
jrodenburg | 1:0182b86f9bd4 | 40 | if(chn3) val = val | CHNL_2; |
jrodenburg | 1:0182b86f9bd4 | 41 | if(chn4) val = val | CHNL_3; |
jrodenburg | 0:a28a1035c31b | 42 | |
jrodenburg | 1:0182b86f9bd4 | 43 | data[0] = GPIO; //register address |
jrodenburg | 1:0182b86f9bd4 | 44 | data[1] = val; //GPIO bit map |
jrodenburg | 5:0f38a0bd4f86 | 45 | data2[0] = PULLUP; |
jrodenburg | 5:0f38a0bd4f86 | 46 | data2[1] = 0x00; |
jrodenburg | 1:0182b86f9bd4 | 47 | |
jrodenburg | 5:0f38a0bd4f86 | 48 | i2c.write((addrI2C<<1)|(I2C_WRITE), data, 2); |
jrodenburg | 5:0f38a0bd4f86 | 49 | i2c.write((addrI2C<<1)|(I2C_WRITE), data2, 2); |
jrodenburg | 7:8a5e65e63e2a | 50 | wait(0.1); |
jrodenburg | 0:a28a1035c31b | 51 | } |
jrodenburg | 0:a28a1035c31b | 52 | |
jrodenburg | 0:a28a1035c31b | 53 | void MCP23008::init(){ |
jrodenburg | 0:a28a1035c31b | 54 | char io_setup[2]; |
jrodenburg | 0:a28a1035c31b | 55 | |
jrodenburg | 0:a28a1035c31b | 56 | io_setup[0] = IODIR; |
jrodenburg | 0:a28a1035c31b | 57 | io_setup[1] = 0x00; //turn all pins to outputs |
jrodenburg | 0:a28a1035c31b | 58 | |
jrodenburg | 0:a28a1035c31b | 59 | i2c.write((addrI2C<<1)|(I2C_WRITE), io_setup, 2); |
jrodenburg | 7:8a5e65e63e2a | 60 | wait(0.1); |
jrodenburg | 0:a28a1035c31b | 61 | |
jrodenburg | 0:a28a1035c31b | 62 | //Set all outputs to off |
jrodenburg | 0:a28a1035c31b | 63 | GPIO_Pin_Status = 0x00; |
jrodenburg | 0:a28a1035c31b | 64 | } |