int main(void)
{
/* Enable GPIOx Clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Initialise LEDs LD3&LD4, both off */
STM32vldiscovery_LEDInit(LED3);
STM32vldiscovery_LEDInit(LED4);
STM32vldiscovery_LEDOff(LED3);
STM32vldiscovery_LEDOff(LED4);
/* Initialise USER Button */
STM32vldiscovery_PBInit(BUTTON_USER, BUTTON_MODE_GPIO);
/* Setup SysTick Timer for 1 msec interrupts */
if (SysTick_Config(SystemCoreClock / 1000))
{
/* Capture error */
while (1);
}
/* Enable access to the backup register => LSE can be enabled */
PWR_BackupAccessCmd(ENABLE);
/* Enable LSE (Low Speed External Oscillation) */
RCC_LSEConfig(RCC_LSE_ON);
/* Check the LSE Status */
while(1)
{
if(LSE_Delay < LSE_FAIL_FLAG)
{
/* check whether LSE is ready, with 4 seconds timeout */
Delay (500);
LSE_Delay += 0x10;
if(RCC_GetFlagStatus(RCC_FLAG_LSERDY) != RESET)
{
/* Set flag: LSE PASS */
LSE_Delay |= LSE_PASS_FLAG;
/* Turn Off Led4 */
STM32vldiscovery_LEDOff(LED4);
/* Disable LSE */
RCC_LSEConfig(RCC_LSE_OFF);
break;
}
}
/* LSE_FAIL_FLAG = 0x80 */
else if(LSE_Delay >= LSE_FAIL_FLAG)
{
if(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
/* Set flag: LSE FAIL */
LSE_Delay |= LSE_FAIL_FLAG;
/* Turn On Led4 */
STM32vldiscovery_LEDOn(LED4);
}
/* Disable LSE */
RCC_LSEConfig(RCC_LSE_OFF);
break;
}
}
/* main while */
while(1)
{
if(0 == STM32vldiscovery_PBGetState(BUTTON_USER))
{
if(KeyState == 1)
{
if(0 == STM32vldiscovery_PBGetState(BUTTON_USER))
{
/* USER Button released */
KeyState = 0;
/* Turn Off LED4 */
STM32vldiscovery_LEDOff(LED4);
}
}
}
else if(STM32vldiscovery_PBGetState(BUTTON_USER))
{
if(KeyState == 0)
{
if(STM32vldiscovery_PBGetState(BUTTON_USER))
{
/* USER Button released */
KeyState = 1;
/* Turn ON LED4 */
STM32vldiscovery_LEDOn(LED4);
Delay(1000);
/* Turn OFF LED4 */
STM32vldiscovery_LEDOff(LED4);
/* BlinkSpeed: 0 -> 1 -> 2, then re-cycle */
BlinkSpeed ++ ;
}
}
}
count++;
Delay(100);
/* BlinkSpeed: 0 */
if(BlinkSpeed == 0)
{
if(4 == (count % 8))
STM32vldiscovery_LEDOn(LED3);
if(0 == (count % 8))
STM32vldiscovery_LEDOff(LED3);
}
/* BlinkSpeed: 1 */
if(BlinkSpeed == 1)
{
if(2 == (count % 4))
STM32vldiscovery_LEDOn(LED3);
if(0 == (count % 4))
STM32vldiscovery_LEDOff(LED3);
}
/* BlinkSpeed: 2 */
if(BlinkSpeed == 2)
{
if(0 == (count % 2))
STM32vldiscovery_LEDOn(LED3);
else
STM32vldiscovery_LEDOff(LED3);
}
/* BlinkSpeed: 3 */
else if(BlinkSpeed == 3)
BlinkSpeed = 0;
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f10x_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f10x.c file
*/
/* Configure the system clocks */
RCC_Configuration();
/* Initialize LEDs LD3 and LD4 and USER Button mounted on STM32VLDISCOVERY Board */
STM32vldiscovery_LEDInit(LED3);
STM32vldiscovery_LEDInit(LED4);
STM32vldiscovery_PBInit(BUTTON_USER, BUTTON_MODE_GPIO);
/* Test if Key Button GPIO Pin level is low (Key push-button on STM32 Discovery Board pressed) */
if (STM32vldiscovery_PBGetState(BUTTON_USER) != 0x00)
{ /* Key is pressed */
/* Turn on LED1 */
STM32vldiscovery_LEDOn(LED3);
/* Disable the Serial Wire Jtag Debug Port SWJ-DP */
GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);
/* Configure PA.13 (JTMS/SWDAT), PA.14 (JTCK/SWCLK) and PA.15 (JTDI) as
output push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PB.03 (JTDO) and PB.04 (JTRST) as output push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4;
GPIO_Init(GPIOB, &GPIO_InitStructure);
while (1)
{
/* Toggle JTMS/SWDAT pin */
GPIO_WriteBit(GPIOA, GPIO_Pin_13, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_13)));
/* Insert delay */
Delay(0x5FFFF);
/* Toggle JTCK/SWCLK pin */
GPIO_WriteBit(GPIOA, GPIO_Pin_14, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_14)));
/* Insert delay */
Delay(0x5FFFF);
/* Toggle JTDI pin */
GPIO_WriteBit(GPIOA, GPIO_Pin_15, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_15)));
/* Insert delay */
Delay(0x5FFFF);
/* Toggle JTDO pin */
GPIO_WriteBit(GPIOB, GPIO_Pin_3, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_3)));
/* Insert delay */
Delay(0x5FFFF);
/* Toggle JTRST pin */
GPIO_WriteBit(GPIOB, GPIO_Pin_4, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_4)));
/* Insert delay */
Delay(0x5FFFF);
}
}
else
{
/* Turn on LD4 */
STM32vldiscovery_LEDOn(LED4);
while (1)
{
}
}
}
