vf6xx: merge gpio/uart examples

The plain "uart" example was just a slightly less featured version.
Compile tested only!

Author: karlp

examples/vf6xx/colibri-vf61/gpio/Makefile renamed to examples/vf6xx/colibri-vf61/uart-gpio/Makefile

@@ -18,7 +18,7 @@
 ## along with this library.  If not, see <http://www.gnu.org/licenses/>.
 ##
 
-BINARY = gpio
+BINARY = uart-gpio
 
 LDSCRIPT = ../colibri-vf61.ld
 

examples/vf6xx/colibri-vf61/gpio/gpio.c renamed to examples/vf6xx/colibri-vf61/uart-gpio/uart-gpio.c

@@ -34,7 +34,6 @@ static const uint32_t gpio_in = IOMUXC_PAD(MUX_MODE_ALT0, SPEED_LOW, \
 			DSE_150OHM, PUS_PU_100KOHM, IOMUXC_IBE);
 
 int _write(int file, char *ptr, int len);
-void sys_tick_handler(void);
 
 int _write(int file, char *ptr, int len)
 {
@@ -50,7 +49,7 @@ int _write(int file, char *ptr, int len)
 	return -1;
 }
 
-static void uart_init()
+static void uart_init(void)
 {
 	ccm_clock_gate_enable(CG9_UART2);
 	uart_enable(UART2);
@@ -61,6 +60,8 @@ int main(void)
 {
 	int old_state = -1;
 	int new_state = 0;
+	int i = 0;
+	float f = 0.0f;
 
 
 	/* Init Clock Control and UART */
@@ -79,14 +80,17 @@ int main(void)
 	/*
 	 * Read input GPIO in a loop and print changes
 	 * A jumper between PTC3<=> PTC2 can be used to set PTC2 to high
+	 * print integer and floating point counters as well, just for fun.
 	 */
 	while (1) {
 		new_state = gpio_get(PTC2);
 		if (old_state != new_state) {
-			printf("GPIO %d is %s\r\n", PTC2,
-				new_state ? "high" : "low");
+			printf("loop: %d (step: %f) GPIO %d is %s\r\n",
+				i, f, PTC2, new_state ? "high" : "low");
 			old_state = new_state;
 		}
+		i++;
+		f += 0.01;
 	}