Hi,
I tried to use the examples provided by logic PD to test the LEDs on my LCDK using pushbuttons. However, the LEDs failed to initialize.
The code is intended for a SOM1 board they manufactured before, but I am not sure what I need to do to change this to be a LCDK compatible code. Can someone provided with some tutorial about how to use the user pushbuttons on CCS? Thank you. The code for using user pushbuttons to control the LEDs is as follows:
//-----------------------------------------------------------------------------
// \file test_led_pb.c
// \brief implementation of OMAP-L138 leds/dip switch/pushbutton test.
//
//-----------------------------------------------------------------------------
#include "stdio.h"
#include "types.h"
#include "evmomapl138.h"
#include "evmomapl138_timer.h"
#include "evmomapl138_led.h"
#include "evmomapl138_pb.h"
#include "test_led_pb.h"
//-----------------------------------------------------------------------------
// Private Defines and Macros
//-----------------------------------------------------------------------------
#define PB_MASK_LED_1 (0x0000001E)
#define PB_MASK_LED_2 (0x000001E0)
//-----------------------------------------------------------------------------
// Static Variable Declarations
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Private Function Prototypes
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Public Function Definitions
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// \brief tests the leds and pushbuttons. lights each led.
// prints message to stdout for pushbutton changes.
//
// \param none.
//
// \return uint32_t
//-----------------------------------------------------------------------------
uint32_t TEST_ledPB(void)
{
uint32_t rtn;
uint32_t i;
uint8_t tmp_val;
uint32_t last_pb_state = 0;
printf("------------------------------------------------------------\r\n");
printf(" OMAP-L138 LED and Pushbutton Test\r\n\r\n");
printf("Test Description\r\n");
printf("----------------\r\n");
printf("this code will begin by flashing the leds, then it will sit in\r\n");
printf("a forever loop checking the pushbuttons. when a change in the \r\n");
printf("pushbuttons is detected, a message will be printed to stdout \r\n");
printf("and an led will be toggled.\r\n");
printf("------------------------------------------------------------\r\n\r\n");
//-------------------------------------
// initialize the required bsl modules.
//-------------------------------------
printf("Initialize the Required BSL Modules\r\n");
printf("-----------------------------------\r\n\r\n");
rtn = LED_init();
if (rtn != ERR_NO_ERROR)
{
printf("error initializing leds!\r\n");
return (rtn);
}
rtn = PB_init();
if (rtn != ERR_NO_ERROR)
{
printf("error initializing pushbuttons.\r\n\r\n");
return (rtn);
}
//--------------
// execute test.
//--------------
printf("\r\nExecute Test\r\n");
printf("------------\r\n\r\n");
printf("flash led patterns\r\n\r\n");
// turn led 0 on and wait 1 second.
LED_turnOn(LED_1);
USTIMER_delay(DELAY_1_SEC);
// turn led 1 on and wait 1 second.
LED_turnOn(LED_2);
USTIMER_delay(DELAY_1_SEC);
// flash leds for a few seconds.
for (i = 0; i < 5; i++)
{
LED_toggle(LED_1);
LED_toggle(LED_2);
USTIMER_delay(DELAY_HALF_SEC);
}
printf("loop forever printing pushbutton status\r\n\r\n");
while (1)
{
// check the pushbuttons and print status changes.
for (i = 0; i < MAX_PB_NUM; i++)
{
rtn = PB_get(i, &tmp_val);
if (rtn != ERR_NO_ERROR)
return (rtn);
if (tmp_val)
{
if (!CHKBIT(last_pb_state, bitval_u32[i]))
{
printf("Pushbutton[%u] was pressed\r\n\r\n", i + 1);
}
SETBIT(last_pb_state, bitval_u32[i]);
}
else
{
if (CHKBIT(last_pb_state, bitval_u32[i]))
{
printf("Pushbutton[%u] was released\r\n\r\n", i + 1);
}
CLRBIT(last_pb_state, bitval_u32[i]);
}
}
// set leds based on latest pb status.
if (CHKBIT(last_pb_state, PB_MASK_LED_1))
LED_turnOn(LED_1);
else
LED_turnOff(LED_1);
if (CHKBIT(last_pb_state, PB_MASK_LED_2))
LED_turnOn(LED_2);
else
LED_turnOff(LED_2);
}
// currently can't reach this due to the forever loop.
// return (rtn);
}
//-----------------------------------------------------------------------------
// Private Function Definitions
//-----------------------------------------------------------------------------
