/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* This sample code shows how to use STM32F3xx CEC HAL API to transmit and
* receive data. The device is set in waiting to receive mode and sends
* messages when the evaluation board buttons are pushed by the user */
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 72 MHz */
SystemClock_Config();
/* LED and button-triggered interruptions initialization */
/* -1- Initialize LEDs mounted on EVAL board */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
BSP_LED_Init(LED4);
/* -2- Configure EXTI Line0 (connected to PA0 pin) in Interrupt mode */
/* Do basically the same as BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI); */
EXTILine0_Config();
/* -3- Configure EXTI Line2 (connected to PA2 pin) in interrupt mode */
/* Do basically the same as BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI); */
EXTILine2_TSC_Config();
/* -4- Configure EXTI Line9-5 (connected to PE6 pin) in interrupt mode */
/* Do basically the same as BSP_PB_Init(BUTTON_SEL, BUTTON_MODE_EXTI); */
EXTILine9_5_Config();
/* -5- Configure EXTI Line15-10 (connected to PF10 pin) in interrupt mode */
/* Do basically the same as BSP_PB_Init(JOY_UP, BUTTON_MODE_EXTI); */
EXTILine15_10_Config();
/* CEC device initialization */
#if defined (DEVICE_1)
DestinationAddress = DEVICE_ADDRESS_2; /* follower address */
#elif defined (DEVICE_2)
DestinationAddress = DEVICE_ADDRESS_1; /* follower address */
#endif
/* -6- CEC configuration (transfer will take place in Interrupt mode) */
hcec.Instance = CEC;
/* Deinitialize CEC to reinitialize from scratch */
HAL_CEC_DeInit(&hcec);
/* IP configuration */
CEC_Config(&hcec);
/* -7- CEC transfer general variables initialization */
ReceivedFrame = 0;
StartSending = 0;
NbOfReceivedBytes = 0;
CEC_FlushRxBuffer();
/* Test start */
/* Enter infinite reception loop: the CEC device is set in
* waiting to receive mode.
* The CEC "background" state is HAL_CEC_STATE_STANDBY_RX.
* Upon any message reception or transmission, the CEC
* comes back to that state.
* It is up to the user to define exit conditions in modifying
* accordingly the RX, TX or Error callback functions. */
HAL_CEC_Receive_IT(&hcec, (uint8_t *)&Tab_Rx);
while (HAL_CEC_GetState(&hcec) != HAL_CEC_STATE_READY)
{
/* if no reception has occurred and no error has been detected,
* transmit a message if the user has pushed a button */
if( (StartSending == 1) && (ReceivedFrame == 0))
{
HAL_CEC_Transmit_IT(&hcec, DestinationAddress, (uint8_t *)&Tab_Tx, TxSize);
/* loop until TX ends or TX error reported */
while (HAL_CEC_GetState(&hcec) != HAL_CEC_STATE_STANDBY_RX);
StartSending = 0;
}
/* if a frame has been received */
if (ReceivedFrame == 1)
{
if (Tab_Rx[1] == 0x44) /* Test on the opcode value */
{
/* Receive command is equal to Volume Up(Button Up) */
if (Tab_Rx[2] == 0x41) /* Test on the operand value */
{
BSP_LED_On(LED1);
BSP_LED_On(LED2);
BSP_LED_On(LED3);
BSP_LED_On(LED4);
}
else if (Tab_Rx[2] == 0x42) /* Receive command is equal to Volume Down(Button Down) */
{
BSP_LED_Off(LED1);
BSP_LED_Off(LED2);
BSP_LED_Off(LED3);
BSP_LED_Off(LED4);
}
}
else if (Tab_Rx[1] == 0x46) /* Test on the opcode value */
{
BSP_LED_On(LED1);
BSP_LED_On(LED2);
BSP_LED_Off(LED3);
BSP_LED_Off(LED4);
}
else if (Tab_Rx[1] == 0x9F) /* Test on the opcode value */
{
BSP_LED_Off(LED1);
BSP_LED_Off(LED2);
BSP_LED_On(LED3);
BSP_LED_On(LED4);
}
ReceivedFrame = 0;
}
else if (ReceivedFrame == 2) /* means CEC error detected */
{
/* Turn on LED3 */
BSP_LED_On(LED3);
ReceivedFrame = 0;
}
} /* while (HAL_CEC_GetState(&hcec) != HAL_CEC_STATE_READY) */
return 0;
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 72 MHz */
SystemClock_Config();
/*## Configuration of peripherals ##########################################*/
/* Initialize LEDs on board */
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
/* Initialize the User Button in Interrupt mode */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
/* Configure external lines 9 to 5 in interrupt mode */
EXTILine9_5_Config();
/* Configuration of ADC peripheral */
ADC_Config();
/* Run the ADC calibration in differential mode */
if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_DIFFERENTIAL_ENDED) != HAL_OK)
{
/* Start Conversation Error */
Error_Handler();
}
/* Configuration of DAC peripheral */
DAC_Config();
/*## Enable peripherals ####################################################*/
/* Set DAC Channel data register: channel corresponding to ADC channel ADCx_CHANNEL_DIFF_HIGH */
/* Set DAC output to 1/2 of full range (4095 <=> Vdda=3.3V): 2048 <=> 1.65V */
if (HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_HIGH, DAC_ALIGN_12B_R, RANGE_12BITS/2) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/* Set DAC Channel data register: channel corresponding to ADC channel ADCx_CHANNEL_DIFF_LOW */
/* Set DAC output to minimum of full range (0 <=> ground 0V) */
if (HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_LOW, DAC_ALIGN_12B_R, 0) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/* Enable DAC Channel: channel corresponding to ADC channel ADCx_CHANNEL_DIFF_HIGH */
if (HAL_DAC_Start(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_HIGH) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Enable DAC Channel: channel corresponding to ADC channel ADCx_CHANNEL_DIFF_LOW */
if (HAL_DAC_Start(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_LOW) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/*## Start ADC conversions #################################################*/
/* Start ADC conversion on regular group with interruption */
if (HAL_ADC_Start_IT(&AdcHandle) != HAL_OK)
{
/* Start Conversation Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
/* Set DAC voltage on channel corresponding to ADC channel ADCx_CHANNEL_DIFF_LOW */
/* in function of user button clicks count. */
/* Set DAC output succesively to: */
/* - minimum of full range (0 <=> ground 0V) */
/* - 1/4 of full range (4095 <=> Vdda=3.3V): 1023 <=> 0.825V */
/* - 1/2 of full range (4095 <=> Vdda=3.3V): 2048 <=> 1.65V */
/* - 3/4 of full range (4095 <=> Vdda=3.3V): 3071 <=> 2.475V */
/* - maximum of full range (4095 <=> Vdda=3.3V) */
if (HAL_DAC_SetValue(&DacHandle,
DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_LOW, DAC_ALIGN_12B_R,
(RANGE_12BITS * uwUserButtonClickCount / USERBUTTON_CLICK_COUNT_MAX)
) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* ADC Differential conversion result calculation: */
/* - An offset of half of full range is added to keep the full dynamic */
/* range of differential voltage. */
/* - Channels voltage is divided by 2, resolution is lowered of 1 bit. */
/* => Diff conversion result = mid-range + (channel_high-channel_low)/2 */
/* Turn-on/off LED2 in function of ADC differential conversion result */
/* - Turn-on LED2 if differential voltage is positive */
/* - Turn-off LED2 if differential voltage is negative */
if (uhADCxConvertedValue > RANGE_12BITS/2)
{
BSP_LED_On(LED2);
}
else
{
BSP_LED_Off(LED2);
}
}
}
