/**
* @brief Example main entry point.
* @par Parameters:
* None
* @retval
* None
*/
void main(void)
{
/* Initialize I/Os in Output Mode for LEDs */
GPIO_Init(LEDS_PORT, LED1_PIN | LED2_PIN, GPIO_MODE_OUT_PP_LOW_FAST);
/* Initialize I/O in Input Mode with Interrupt for button and joystick */
/* Button */
GPIO_Init(BUTTON_PORT, BUTTON_PIN, GPIO_MODE_IN_FL_IT);
/* Joystick */
GPIO_Init(JOYSTICK_PORT, JOYSTICK_DOWN_PIN, GPIO_MODE_IN_FL_IT);
/* Initialize the Interrupt sensitivity for button and joystick */
EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOB, EXTI_SENSITIVITY_FALL_LOW);
EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_FALL_LOW);
/*
Change the software priority between button and joystick:
- By hardware the PORTB (joystick) has a higher priority than PORTC (button)
- We configure the PORTC (button) to have a higher sw priority than PORTB (joystick)
*/
ITC_SetSoftwarePriority(ITC_IRQ_PORTB, ITC_PRIORITYLEVEL_1); /* joystick */
ITC_SetSoftwarePriority(ITC_IRQ_PORTC, ITC_PRIORITYLEVEL_2); /* button = higher sw priority */
enableInterrupts();
/* LEDs are ON together */
GPIO_WriteHigh(LEDS_PORT, (LED1_PIN | LED2_PIN));
while (1);
}
void timer_init()
{
TIM2_DeInit();
TIM2_TimeBaseInit(TIM2_PRESCALER_1, 1600);
//TIM2_PrescalerConfig(TIM2_PRESCALER_32768, TIM2_PSCRELOADMODE_IMMEDIATE);
TIM2_ITConfig(TIM2_IT_UPDATE, ENABLE);
ITC_SetSoftwarePriority(ITC_IRQ_TIM2_OVF, ITC_PRIORITYLEVEL_1);
TIM2_Cmd(ENABLE);
}
void setINTPri(void)
{
disableInterrupts();
ITC_SetSoftwarePriority(ITC_IRQ_TIM1_OVF, ITC_PRIORITYLEVEL_2);
ITC_SetSoftwarePriority(ITC_IRQ_ADC1, ITC_PRIORITYLEVEL_1);
ITC_SetSoftwarePriority(ITC_IRQ_TIM2_OVF, ITC_PRIORITYLEVEL_2);
ITC_SetSoftwarePriority(ITC_IRQ_TIM4_OVF, ITC_PRIORITYLEVEL_2);
ITC_SetSoftwarePriority(ITC_IRQ_UART2_TX, ITC_PRIORITYLEVEL_3);
ITC_SetSoftwarePriority(ITC_IRQ_UART2_RX, ITC_PRIORITYLEVEL_3);
enableInterrupts();
}
/**
* @brief Main program.
* @param None
* @retval None
*/
void main()
{
/* TIM4 & I2C clock Enable*/
CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE);
CLK_PeripheralClockConfig(CLK_Peripheral_I2C1, ENABLE);
#ifdef FAST_I2C_MODE
/* system_clock / 1 */
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
#else
/* system_clock / 2 */
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_2);
#endif
/* Initialize LEDs mounted on STM8L1526-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Initialize push-buttons mounted on STM8L1526-EVAL board */
STM_EVAL_PBInit(BUTTON_RIGHT, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_LEFT, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_UP, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_DOWN, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_EXTI);
/* Initialize TIM4 peripheral to generate an interrupt each 1ms */
TIM4_TimeBaseInit(TIM4_Prescaler_128, TIM4_PERIOD);
/* Enable Update interrupt */
TIM4_ITConfig(TIM4_IT_Update, ENABLE);
/* Initialize I2C peripheral */
I2C_Init(I2C1, I2C_SPEED, 0xA0,
I2C_Mode_I2C, I2C_DutyCycle_2,
I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);
/* Set I2C IT software priority as highest */
#ifdef STM8L15X_MD
ITC_SetSoftwarePriority(I2C1_IRQn, ITC_PriorityLevel_3);
#elif defined (STM8L15X_HD) || defined (STM8L15X_MDP)
ITC_SetSoftwarePriority(I2C1_SPI2_IRQn, ITC_PriorityLevel_3);
#endif /* STM8L15X_MD */
enableInterrupts();
/* Enable TIM4 */
TIM4_Cmd(ENABLE);
while (1)
{
switch (PressedButton)
{
case BUTTON_RIGHT:
PressedButton = NO_BUTTON;
NumOfBytes = 1;
TxBuffer[NumOfBytes-1] = 0x01;
ButtonPressed = 1;
break;
case BUTTON_LEFT:
PressedButton = NO_BUTTON;
NumOfBytes = 1;
TxBuffer[NumOfBytes-1] = 0x02;
ButtonPressed = 1;
break;
case BUTTON_UP:
PressedButton = NO_BUTTON;
NumOfBytes = 1;
TxBuffer[NumOfBytes-1] = 0x03;
ButtonPressed = 1;
break;
case BUTTON_DOWN:
PressedButton = NO_BUTTON;
NumOfBytes = 1;
TxBuffer[NumOfBytes-1] = 0x04;
ButtonPressed = 1;
break;
case BUTTON_SEL:
PressedButton = NO_BUTTON;
NumOfBytes = BUFFERSIZE;
TxBuffer[0] = 0xAA;
ButtonPressed = 1;
for (i = 1; i < NumOfBytes; i++)
{
TxBuffer[i] = i;
}
break;
default:
break;
}
if (ButtonPressed == 1)
{
/* Enable Buffer and Event Interrupt*/
I2C_ITConfig(I2C1, (I2C_IT_TypeDef)(I2C_IT_EVT | I2C_IT_BUF) , ENABLE);
/* Generate the Start condition */
I2C_GenerateSTART(I2C1, ENABLE);
/*
Data transfer is performed in the I2C interrupt routine
*/
/* Wait until end of data transfer */
while (NumOfBytes);
while (I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
/* Make sure that the STOP bit is cleared by Hardware before CR2 write access */
while ((I2C1->CR2 & I2C_CR2_STOP) == I2C_CR2_STOP);
ButtonPressed = 0;
}
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
void main(void)
{
/* Initialize LEDs mounted on STM8L152X-EVAL board */
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
/* Initialize key and Joystick down buttons mounted on STM8L152X-EVAL board */
STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_DOWN, BUTTON_MODE_EXTI);
#ifdef USE_STM8L1526_EVAL
/* Set PC1 sensitivity to falling edge and low level */
EXTI_SetPinSensitivity(EXTI_Pin_1, EXTI_Trigger_Falling_Low);
/* Set PD4 sensitivity to falling edge and low level */
EXTI_SetPinSensitivity(EXTI_Pin_4, EXTI_Trigger_Falling_Low);
/*
Change the software priority between key and joystick down buttons:
- By default the Pin_1 (key) and Pin_4 have the same priority level: level3
- We configure the Pin_4 (joystick_down) to have a higher sw priority than Pin_1 (key)
*/
/* Set the EXTI1 IRQ (which is connected to key button) level to 1 */
ITC_SetSoftwarePriority(EXTI1_IRQn, ITC_PriorityLevel_1);
/* Set the EXTI4 IRQ (which is connected to joystick down button) software level to 2 */
/* Thus joystick down button IRQ software priority is higher than key one */
/* Pressing joystick down button interrupts the execution of the EXTI1 Interrupt Service Routine */
ITC_SetSoftwarePriority(EXTI4_IRQn, ITC_PriorityLevel_2);
#elif defined USE_STM8L1528_EVAL
/* Set PH6 sensitivity to falling edge and low level */
EXTI_SetPinSensitivity(EXTI_Pin_6, EXTI_Trigger_Falling_Low);
/* Set PG1 sensitivity to falling edge and low level */
EXTI_SetPinSensitivity(EXTI_Pin_1, EXTI_Trigger_Falling_Low);
/*
Change the software priority between key and joystick down buttons:
- By default the Pin_6 (key) and Pin_1 have the same priority level: level3
- We configure the Pin_1 (joystick_down) to have a higher sw priority than Pin_6 (key)
*/
/* Set the EXTI6 IRQ (which is connected to key button) level to 1 */
ITC_SetSoftwarePriority(EXTI6_IRQn, ITC_PriorityLevel_1);
/* Set the EXTI1 IRQ (which is connected to joystick down button) software level to 2 */
/* Thus joystick down button IRQ software priority is higher than key one */
/* Pressing joystick down button interrupts the execution of the EXTI6 Interrupt Service Routine */
ITC_SetSoftwarePriority(EXTI1_IRQn, ITC_PriorityLevel_2);
#endif /* USE_STM8L152X_EVAL */
/* enable interrupts by setting level 0 */
enableInterrupts();
/* LD2 and LD3 are on */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
while (1);
}
