main.c File Reference

Example: Read raw temperature from BMP180 over I2C and print via UART2. More...

#include "navhal.h"

Include dependency graph for main.c:

Macros
#define	CORTEX_M4
#define	BMP180_ADDR   0x77
#define	BMP180_REG_CONTROL   0xF4
#define	BMP180_REG_RESULT   0xF6
#define	BMP180_CMD_TEMP   0x34
#define	I2C_BUS   I2C1

Functions
int	main (void)

Detailed Description

Example: Read raw temperature from BMP180 over I2C and print via UART2.

• Initializes SysTick for delay functions.
• Configures UART2 at 9600 baud for console output.
• Configures I2C1 and GPIO pins for BMP180 communication (PB8=SCL, PB9=SDA).
• Periodically starts a temperature measurement, reads the raw value, and prints it.

Note

Delay between measurement and reading follows BMP180 datasheet (~4.5 ms).

© 2025 NAVROBOTEC PVT. LTD. All rights reserved.

Macro Definition Documentation

BMP180_ADDR

#define BMP180_ADDR   0x77

BMP180_CMD_TEMP

#define BMP180_CMD_TEMP   0x34

BMP180_REG_CONTROL

#define BMP180_REG_CONTROL   0xF4

BMP180_REG_RESULT

#define BMP180_REG_RESULT   0xF6

CORTEX_M4

#define CORTEX_M4

I2C_BUS

#define I2C_BUS   I2C1

Function Documentation

main()

int main

(

void

)

< Initialize SysTick for delays

< Initialize UART2 at 9600 baud

< Stop execution if I2C init fails

< Wait for conversion (~4.5 ms for temperature)

< Assumes uart2_write_int exists

< Wait 1 second before next measurement