msp430f5529-blinking-led/Readme.md

# Introduction
Basic code to Blink the LED on the MSP430 F5529 Launchpad Evaluation Kit MSP-EXP430F5529LP from Texas Instruments, using the GCC tool-chain from terminal.

# The repository
This repository includes the `main.c` and `msp430.dat` files required to accomplish the compilation and debuging process.

## The Code `main.c`

The example code blinks the on board LED attached to **P1.0**, you can copy the contents from here or clone use the file included in the repository:

```
#include <msp430f5529.h> 
void main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer
//	PM5CTL0 = 0x0000;		// disable high impedance mode
	P1DIR = 0x01;   		//set up bit 0 of P1 as output
	P1OUT = 0x00;  			//initialize bit 0 of P1 to 0
	
	for(;;){    			//loop
	    volatile unsigned int i;
	    P1OUT ^= 0x01;  		//toggle bit 0 of P1
	    				//Delay
	    for(i=40000; i>0;){
	        i--;
	        __no_operation();
	    }
	}
}
``` 

## The `msp430.dat`
The content of `msp430.dat` configures the communication between computer and the launchpad.

Add more description later

# Compiling 

```
export PATH="/home/gmarx/msp430-gcc/bin:$PATH"
msp430-elf-gcc -I /home/gmarx/msp430-gcc/include -L /home/gmarx/msp430-gcc/include  -mmcu=msp430f5529 -O2 -g main.c -o main.o
```

# Debuging

```
gdb_agent_console msp430.dat
CPU Name             Port
--------             ----
msp430              :55000

Starting all cores
CPU Name             Status
--------             ------
msp430               Waiting for client
```

In a new terminal tab or window:
```
msp430-elf-gdb --tui main.o
(gdb) target remote :55000
Remote debugging using :55000
0x00004400 in __crt0_start ()

```

The agent will response in the other terminal:
```
msp430               Client connected...Connecting to Target
Found USB FET at ttyACM0
Target connected...Starting server
```

Then, continue in the gdb terminal prompt:

```
(gdb) load
Loading section .lowtext, size 0xa lma 0x4400
Loading section .text, size 0x2e lma 0x440a
Loading section __reset_vector, size 0x2 lma 0xfffe
Start address 0x00004400, load size 58
Transfer rate: 38 bytes/sec, 19 bytes/write.
(gdb) b 1
Breakpoint 1 at 0x440c: file main.c, line 4.
(gdb) continue
Continuing.

Breakpoint 1, main () at main.c:4
(gdb) s 1 
```

and you will see the code in the terminal running step by step, or write `continue` to observe the LED blinking on the Launch pad board.


# Problems:

```
msp430-elf-gdb main.o
msp430-elf-gdb: error while loading shared libraries: libncursesw.so.5: cannot open shared object file: No such file or directory

yay -S ncurses5-compat-libs
```