Subversion Repositories Code-Repo

Rev

Rev 270 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 270 Rev 273
Line 1... Line 1...
1 
#include "defines.h"
 1 
#include "defines.h"
2 
#include "MCP23009.h"
 2 
#include "MCP23009.h"
3 
#include "I2C2.h"
 3 
#include "I2C2.h"
4 
 
 4 
 
- 
 
 5 
static BTN_STATUS *status_ptr;
5 
 
 6 
 
6 
void MCP23009_Init(void) {
 7 
void MCP23009_Init(BTN_STATUS *status) {
- 
 
 8 
    status_ptr = status;
- 
 
 9
7 
    uint8_t buffer[8];
 10 
    uint8_t buffer[8];
8 
 
 11 
 
9 
    buffer[0] = 0x00;   // Starting register address
 12 
    buffer[0] = 0x00;   // Starting register address
10 
    buffer[1] = 0xFF;   // Set all pins as inputs
 13 
    buffer[1] = 0xFF;   // IODIR, Set all pins as inputs
11 
    buffer[2] = 0xFF;   // Reported values are inverted
 14 
    buffer[2] = 0xFF;   // IPOL, Reported values are inverted
12 
    buffer[3] = 0x00;   // Disable interrupt-on-change
 15 
    buffer[3] = 0xFF;   // GPINTEN, Enable interrupt-on-change
13 
    buffer[4] = 0x00;   // IOC default values
 16 
    buffer[4] = 0x00;   // DEFVAL, IOC default values
14 
    buffer[5] = 0x00;   // IOC compare to previous pin value
 17 
    buffer[5] = 0x00;   // INTCON, IOC compare to previous value
15 
    buffer[6] = 0x00;   // Config settings
 18 
    buffer[6] = 0x00;   // IOCON, Incrementing address, active-low interrupt cleared on GPIO read
16 
    buffer[7] = 0xFF;   // Enable pull-ups on all pins
 19 
    buffer[7] = 0xFF;   // GPPU, Enable pull-ups on all pins
17 
 
 20 
 
18 
    I2C2_Master_Send(MCP23009_ADDR, 8, buffer);
 21 
    I2C2_Master_Send(MCP23009_ADDR, 8, buffer);
19 
    uint8_t result;
 22 
    uint8_t result;
20 
    do {
 23 
    do {
21 
        result = I2C2_Get_Status();
 24 
        result = I2C2_Get_Status();
22 
    } while (!result);
 25 
    } while (!result);
23 
}
 26 
}
24 
 
 27 
 
25 
void MCP23009_Query(BTN_STATUS *status) {
 28 
void MCP23009_Query(void) {
26 
    uint8_t buffer[2] = {MCP23009_GPIOA};
 29 
    uint8_t buffer[2];
27 
 
 30 
 
28 
    I2C2_Master_Send(MCP23009_ADDR, 1, buffer);
 - 
 
29 
    uint8_t result;
 - 
 
30 
    do {
 - 
 
31 
        result = I2C2_Get_Status();
 - 
 
32 
    } while (!result);
 - 
 
33 
 
 - 
 
34 
    I2C2_Master_Recv(MCP23009_ADDR, 1);
 31 
    I2C2_Master_Restart(MCP23009_ADDR, MCP23009_GPIOA, 1);
35 
    uint8_t result;
 32 
    uint8_t result;
36 
    do {
 33 
    do {
37 
        result = I2C2_Get_Status();
 34 
        result = I2C2_Get_Status();
38 
    } while (!result);
 35 
    } while (!result);
39 
    I2C2_Read_Buffer(buffer);
 36 
    I2C2_Read_Buffer(buffer);
40 
 
 37 
 
41 
    status->w = buffer[0];
 - 
 
42 
}
 - 
 
43 

            38
            
    status_ptr->w = buffer[0];

          

          

            -
            
 

            39
            
}

          

          

            -
            
 

            40