Name of the project
l152_slotted_nb_delays
Description
Application will simultaneously blink 4 LEDs at 4 different speeds. This is a demonstration for the library presented in the previous article. It is a simple app, but more complex ones can be written like simultaneously scrolling a text on 4 (or more) 7seg LED displays. reading temperature sensors, sending data on serial, displaying data on an alpha numeric LCD, while “waiting” for a button to be pressed, etc. You use the VPC to set the board clocks and the four output pins. In my example I labeled them from LED1 to LED4
Code snippet: the required headers and definitions (some are already inserted by the VPC):
#include "stdint.h"
#include "main.h"
#include "my_gpio.h"
#include "my_uart.h"
#define TIM6_SNBD_FREQ 1000 // every 1 millisecond
#define TIM6_SNBD_NR_SLOTS 4 // we are using 4 different delays
#include "tim6_slotted_nb_delays.h"
Code snippet: the main code of the application (well, the user written part):
#define LED1_DELAY_IDX 0 // first delay has 0 index as is a place in an array
#define LED2_DELAY_IDX 1
#define LED3_DELAY_IDX 2
#define LED4_DELAY_IDX 3
#define LED1_DELAY 250 // delay in milliseconds
#define LED2_DELAY 500
#define LED3_DELAY 750
#define LED4_DELAY 1000
int main(void){
/* local variables */
/* mandatory system initializations */
vpc_system_init();
//vpc_rtc_init(); /* enable if required */
vpc_gpio_init();
//vpc_usart2_uart_init(); /* enable if required */
/* third-party initializations */
/* do your own initializations below */
tim6_snbd_init();
tim6_snbd_set(LED1_DELAY_IDX, LED1_DELAY);
tim6_snbd_set(LED2_DELAY_IDX, LED2_DELAY);
tim6_snbd_set(LED3_DELAY_IDX, LED3_DELAY);
tim6_snbd_set(LED4_DELAY_IDX, LED4_DELAY);
while(1){
/* your forever repeating code */
if (tim6_snbd_check(LED1_DELAY_IDX)){
GPIO_ToggleBits(LED1_Port, LED1_Pin);
tim6_snbd_set(LED1_DELAY_IDX, LED1_DELAY);
}
if (tim6_snbd_check(LED2_DELAY_IDX)){
GPIO_ToggleBits(LED2_Port, LED2_Pin);
tim6_snbd_set(LED2_DELAY_IDX, LED2_DELAY);
}
if (tim6_snbd_check(LED3_DELAY_IDX)){
GPIO_ToggleBits(LED3_Port, LED3_Pin);
tim6_snbd_set(LED3_DELAY_IDX, LED3_DELAY);
}
if (tim6_snbd_check(LED4_DELAY_IDX)){
GPIO_ToggleBits(LED4_Port, LED4_Pin);
tim6_snbd_set(LED4_DELAY_IDX, LED4_DELAY);
}
}
return 0;
}
Note
This example require version 3.3.3 or newer of VPC.
Project published in repository.
VPC - Visual Pin Configurator 