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electric2277
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| HMC6352 with PIC18LF4321 |
 Posted: Thu Feb 18, 2010 5:27 pm |
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I am trying to get my HMC6352 working with my PIC18LF4321, however when I use the code at the beginning of this post (slightly tweaked), I get very large number for the msb and lsb (the number is 4294836352).
Something to note is that I could not compile with
"lsb = SWReadI2C(0);"
I had to leave the '0' out in order to not have an "error [1204] too many arguments in function call"
My code is below:
| Code: |
#include "p18f4321.h" // Define PIC18LF4321 registers and bits
#include "usart.h" // Define Usart settings for serial output
#include "delays.h" // def
#include <stdio.h>
#include "sw_i2c.h"
/*******************************
* Configuration selections
*******************************
*/
#pragma config OSC = XT // Use RA6 and RA7 for 1-4MHz crystal oscillator
#pragma config WDT = OFF // Disable watchdog timer
#pragma config PWRT = OFF // Disable power-up delay //
#pragma config LVP = OFF // Disable low-voltage programming //
#pragma config MCLRE = ON // Enable master clear pin //
#pragma config CCP2MX = RB3 // Connect CCP2 internally to RB3 pin //
#pragma config BOR = SOFT // Brown-out reset controlled by software //
#pragma config BORV = 3 // Brown-out voltage set for 2.1V, nominal //
#pragma config LPT1OSC = OFF // Deselect low-power Timer1 oscillator //
/*******************************
* Global variables
*******************************/
#define HMC6352_I2C_WRITE_ADDRESS 0x42
#define HMC6352_I2C_READ_ADDRESS 0x43
#define HMC6352_GET_DATA_COMMAND 0x41
/*******************************
* Function prototypes
*******************************
*/
void Initial(void);
void InitTX(void);
void InitI2C(void);
void HMC6352_read_heading(void);
void HMC6352_read_heading()
{
int lsb;
int msb;
int addy;
SWStartI2C(); //i2c_start();
SWWriteI2C(HMC6352_I2C_WRITE_ADDRESS); //i2c_write(HMC6352_I2C_WRITE_ADDRESS);
SWWriteI2C(HMC6352_GET_DATA_COMMAND); //i2c_write(HMC6352_GET_DATA_COMMAND);
SWStopI2C(); //i2c_stop();
Delay1KTCYx(40); //delays 4000 cycles of 4 MHZ = 1 ms //delay_ms(7); // Allow 1 ms extra for safety
SWStartI2C(); //i2c_start();
SWWriteI2C(HMC6352_I2C_READ_ADDRESS); //i2c_write(HMC6352_I2C_READ_ADDRESS);
msb = SWReadI2C(); //msb=i2c_read();
lsb = SWReadI2C(0); //msb=i2c_read(0);
SWStopI2C(); //i2c_stop();
printf("MSB = %lu\n\r", msb);
printf("LSB = %lu\n\r", lsb);
}
/////// Main program //////////////////////////////////////////////////////////
/*******************************
* main
*******************************
*/
void main()
{
Initial(); // Initialize everything
InitTX(); // Initialize the UART
printf("Compass Heading = ");
while (1)
{
HMC6352_read_heading();
Delay10KTCYx(100);
}
}
/*******************************
* Initial
*
* This function performs all initializations of variables and registers.
*******************************
*/
void Initial()
{
OSCCON = 0b01100010; // Use Fosc = 4 MHz (Fcpu = 1 MHz)
ADCON1 = 0b00001011; // RA0,RA1,RA3 pins analog; others digital
TRISA = 0b00001111; // Set I/O for PORTA
TRISB = 0b00010000; // Set I/O for PORTB
TRISC = 0b00001100; // Set I/O for PORTC
TRISD = 0b10000000; // Set I/O for PORTD
TRISE = 0b00000010; // Set I/O for PORTE
PORTA = 0; // Set initial state for all outputs low
PORTB = 0;
PORTC = 0;
PORTD = 0;
PORTE = 0;
Delay10KTCYx(50);
RCONbits.SBOREN = 0; // Now disable brown-out reset
}
void InitTX()
{
RCSTA = 0b10010000; // Enable UART
TXSTA = 0b00100000; // Enable TX
SPBRG = 12; // Set baud rate corresponds to 19200 baudrate
BAUDCON = 0b00001000;
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Feb 18, 2010 5:34 pm |
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| You're using the Microchip C18 compiler. This forum is for the CCS compiler. |
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electric2277
Guest
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| CCS Compiler |
| Posted: Fri Feb 19, 2010 10:39 am |
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| Where do I go to get the CCS Compiler. I am guessing that it is not free. |
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