diff --git a/flight/OpenPilot/System/inc/pios_board.h b/flight/OpenPilot/System/inc/pios_board.h index d5c7eff8b..e787b1ee5 100644 --- a/flight/OpenPilot/System/inc/pios_board.h +++ b/flight/OpenPilot/System/inc/pios_board.h @@ -28,6 +28,23 @@ #define PIOS_BOARD_H +//------------------------ +// Timers and Channels Used +//------------------------ +/* +Timer | Channel 1 | Channel 2 | Channel 3 | Channel 4 +------+-----------+-----------+-----------+---------- +TIM1 | RC In 3 | RC In 6 | RC In 5 | +TIM2 | --------------- PIOS_DELAY ----------------- +TIM3 | RC In 7 | RC In 8 | RC In 1 | RC In 2 +TIM4 | Servo 1 | Servo 2 | Servo 3 | Servo 4 +TIM5 | RC In 4 | | | +TIM6 | ----------- PIOS_PWM (Supervisor) ---------- +TIM7 | | | | +TIM8 | Servo 5 | Servo 6 | Servo 7 | Servo 8 +------+-----------+-----------+-----------+---------- +*/ + //------------------------ // DMA Channels Used //------------------------ @@ -181,7 +198,7 @@ // Delay Timer //------------------------- #define PIOS_DELAY_TIMER TIM2 -#define PIOS_DELAY_TIMER_RCC RCC_APB1Periph_TIM2 +#define PIOS_DELAY_TIMER_RCC_FUNC RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE) //------------------------- // Master Clock @@ -232,7 +249,13 @@ #define RECEIVER8_PIN GPIO_Pin_5 // PB5 #define RECEIVER8_TIM_PORT TIM3 #define RECEIVER8_CH TIM_Channel_2 // TIM3_CH2 -#define NUM_RECEIVER_INPUTS 8 +#define PIOS_PWM_NUM_INPUTS 1 +#define PIOS_PWM_SUPV_ENABLED 1 +#define PIOS_PWM_SUPV_TIMER TIM6 +#define PIOS_PWM_SUPV_TIMER_RCC_FUNC RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE) +#define PIOS_PWM_SUPV_HZ 25 +#define PIOS_PWM_SUPV_IRQ_CHANNEL TIM6_IRQn +#define PIOS_PWM_SUPV_IRQ_FUNC void TIM6_IRQHandler(void) //------------------------- // Servo outputs diff --git a/flight/OpenPilot/System/openpilot.c b/flight/OpenPilot/System/openpilot.c index 2d4e70a7e..e4b5a5ac8 100644 --- a/flight/OpenPilot/System/openpilot.c +++ b/flight/OpenPilot/System/openpilot.c @@ -106,7 +106,7 @@ int main() /* Create a FreeRTOS task */ xTaskCreate(TaskTick, (signed portCHAR *)"Test", configMINIMAL_STACK_SIZE , NULL, 1, NULL); xTaskCreate(TaskTesting, (signed portCHAR *)"TaskTesting", configMINIMAL_STACK_SIZE , NULL, 4, NULL); - //xTaskCreate(TaskServos, (signed portCHAR *)"Servos", configMINIMAL_STACK_SIZE , NULL, 4, NULL); + xTaskCreate(TaskServos, (signed portCHAR *)"Servos", configMINIMAL_STACK_SIZE , NULL, 3, NULL); //xTaskCreate(TaskSDCard, (signed portCHAR *)"SDCard", configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 2), NULL); /* Start the FreeRTOS scheduler */ @@ -142,7 +142,7 @@ static void TaskTick(void *pvParameters) static void TaskTesting(void *pvParameters) { - portTickType xDelay = 500 / portTICK_RATE_MS; + portTickType xDelay = 1000 / portTICK_RATE_MS; portTickType xTimeout = 10 / portTICK_RATE_MS; for(;;) @@ -160,7 +160,7 @@ static void TaskTesting(void *pvParameters) PIOS_COM_SendFormattedStringNonBlocking(COM_DEBUG_USART, "%u\r", PIOS_BMP085_GetPressure()); */ - PIOS_COM_SendFormattedStringNonBlocking(COM_DEBUG_USART, "%u uS\r", PIOS_PWM_Get()); + PIOS_COM_SendFormattedStringNonBlocking(COM_DEBUG_USART, "%u uS\r", PIOS_PWM_Get(0)); /* This blocks the task until there is something on the buffer */ /*xSemaphoreTake(PIOS_USART1_Buffer, portMAX_DELAY); diff --git a/flight/PiOS/STM32F10x/pios_delay.c b/flight/PiOS/STM32F10x/pios_delay.c index 4619091ad..6c140349c 100644 --- a/flight/PiOS/STM32F10x/pios_delay.c +++ b/flight/PiOS/STM32F10x/pios_delay.c @@ -44,11 +44,7 @@ int32_t PIOS_DELAY_Init(void) { /* Enable timer clock */ - if(PIOS_DELAY_TIMER_RCC == RCC_APB2Periph_TIM1 || PIOS_DELAY_TIMER_RCC == RCC_APB2Periph_TIM8) { - RCC_APB2PeriphClockCmd(PIOS_DELAY_TIMER_RCC, ENABLE); - } else { - RCC_APB1PeriphClockCmd(PIOS_DELAY_TIMER_RCC, ENABLE); - } + PIOS_DELAY_TIMER_RCC_FUNC; /* Time base configuration */ TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; diff --git a/flight/PiOS/STM32F10x/pios_pwm.c b/flight/PiOS/STM32F10x/pios_pwm.c index c4e0615e4..4cc849796 100644 --- a/flight/PiOS/STM32F10x/pios_pwm.c +++ b/flight/PiOS/STM32F10x/pios_pwm.c @@ -32,20 +32,40 @@ #if !defined(PIOS_DONT_USE_PWM) /* Local Variables */ -static volatile uint16_t ic3_readvalue1 = 0, ic3_readvalue2 = 0; -static volatile uint16_t capture_number = 0; -static volatile uint32_t CAPTURE = 0; -static volatile uint32_t TIM3_FREQ = 0; +static uint8_t CaptureState[PIOS_PWM_NUM_INPUTS]; +static uint16_t RiseValue[PIOS_PWM_NUM_INPUTS]; +static uint16_t FallValue[PIOS_PWM_NUM_INPUTS]; +static uint32_t CaptureValue[PIOS_PWM_NUM_INPUTS]; + +static uint8_t SupervisorState = 0; +static uint32_t CapCounter[PIOS_PWM_NUM_INPUTS]; +static uint32_t CapCounterPrev[PIOS_PWM_NUM_INPUTS]; + /** * Initialises all the LED's */ void PIOS_PWM_Init(void) { + /* Flush counter variables */ + int32_t i; + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + CaptureState[i] = 0; + } + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + RiseValue[i] = 0; + } + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + FallValue[i] = 0; + } + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + CaptureValue[i] = 0; + } + /* Setup RCC */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); - /* Enable the TIM3 global Interrupt */ + /* Enable timer interrupts */ NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; @@ -53,8 +73,10 @@ void PIOS_PWM_Init(void) NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); + /* Partial pin remap for PB5 */ GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); + /* Configure input pins */ GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; @@ -62,8 +84,8 @@ void PIOS_PWM_Init(void) GPIO_InitStructure.GPIO_Pin = RECEIVER8_PIN; GPIO_Init(RECEIVER8_GPIO_PORT, &GPIO_InitStructure); + /* Configure timer for input capture */ TIM_ICInitTypeDef TIM_ICInitStructure; - TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; @@ -72,20 +94,75 @@ void PIOS_PWM_Init(void) TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; TIM_ICInit(RECEIVER8_TIM_PORT, &TIM_ICInitStructure); + /* Configure timer clocks */ TIM_InternalClockConfig(RECEIVER8_TIM_PORT); TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); TIM_TimeBaseStructure.TIM_Period = 0xFFFF; - TIM_TimeBaseStructure.TIM_Prescaler = (PIOS_MASTER_CLOCK / 1000000) - 1;//17; // fCK_PSC / (17 + 1) 1ms = 4000 + TIM_TimeBaseStructure.TIM_Prescaler = (PIOS_MASTER_CLOCK / 1000000) - 1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(RECEIVER8_TIM_PORT, &TIM_TimeBaseStructure); - /* TIM enable counter */ - TIM_Cmd(RECEIVER8_TIM_PORT, ENABLE); - /* Enable the CC2 Interrupt Request */ TIM_ITConfig(RECEIVER8_TIM_PORT, TIM_IT_CC2, ENABLE); + + /* Enable timers */ + TIM_Cmd(RECEIVER8_TIM_PORT, ENABLE); + + + /* Supervisor Setup */ +#if (PIOS_PWM_SUPV_ENABLED) + /* Flush counter variables */ + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + CapCounter[i] = 0; + } + for(i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + CapCounterPrev[i] = 0; + } + + /* Enable timer clock */ + PIOS_PWM_SUPV_TIMER_RCC_FUNC; + + /* Configure interrupts */ + NVIC_InitStructure.NVIC_IRQChannel = PIOS_PWM_SUPV_IRQ_CHANNEL; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); + + /* Time base configuration */ + TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); + TIM_TimeBaseStructure.TIM_Period = ((1000000 / PIOS_PWM_SUPV_HZ) - 1); + TIM_TimeBaseStructure.TIM_Prescaler = (PIOS_MASTER_CLOCK / 1000000) - 1; /* For 1 uS accuracy */ + TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; + TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; + TIM_TimeBaseInit(PIOS_PWM_SUPV_TIMER, &TIM_TimeBaseStructure); + + /* Enable the CC2 Interrupt Request */ + TIM_ITConfig(PIOS_PWM_SUPV_TIMER, TIM_IT_Update, ENABLE); + + /* Clear update pending flag */ + TIM_ClearFlag(TIM2, TIM_FLAG_Update); + + /* Enable counter */ + TIM_Cmd(PIOS_PWM_SUPV_TIMER, ENABLE); +#endif +} + +/** +* Get the value of an input channel +* \param[in] Channel Number of the channel desired +* \output -1 Channel not available +* \output >0 Channel value +*/ +int32_t PIOS_PWM_Get(int8_t Channel) +{ + /* Return error if channel not available */ + if(Channel >= PIOS_PWM_NUM_INPUTS) { + return -1; + } + return CaptureValue[Channel]; } /** @@ -97,49 +174,82 @@ void TIM3_IRQHandler(void) /* Clear TIM3 Capture compare interrupt pending bit */ TIM_ClearITPendingBit(RECEIVER8_TIM_PORT, TIM_IT_CC2); - if(capture_number == 0) { + /* Simple rise or fall state machine */ + if(CaptureState[0] == 0) { /* Get the Input Capture value */ - ic3_readvalue1 = TIM_GetCapture2(RECEIVER8_TIM_PORT); - capture_number = 1; + RiseValue[0] = TIM_GetCapture2(RECEIVER8_TIM_PORT); + /* Switch states */ + CaptureState[0] = 1; + + /* Switch polarity of input capture */ TIM_ICInitTypeDef TIM_ICInitStructure; - TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; + TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; + TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; + TIM_ICInitStructure.TIM_ICFilter = 0x0; + TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling; - TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; - TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; - TIM_ICInitStructure.TIM_ICFilter = 0x0; TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; TIM_ICInit(RECEIVER8_TIM_PORT, &TIM_ICInitStructure); - } else if(capture_number == 1) { + } else { /* Get the Input Capture value */ - ic3_readvalue2 = TIM_GetCapture2(RECEIVER8_TIM_PORT); - - TIM_ICInitTypeDef TIM_ICInitStructure; - TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; - TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; - TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; - TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; - TIM_ICInitStructure.TIM_ICFilter = 0x0; - TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; - TIM_ICInit(RECEIVER8_TIM_PORT, &TIM_ICInitStructure); + FallValue[0] = TIM_GetCapture2(RECEIVER8_TIM_PORT); /* Capture computation */ - if (ic3_readvalue2 > ic3_readvalue1) { - CAPTURE = (ic3_readvalue2 - ic3_readvalue1); + if (FallValue[0] > RiseValue[0]) { + CaptureValue[0] = (FallValue[0] - RiseValue[0]); } else { - CAPTURE = ((0xFFFF - ic3_readvalue1) + ic3_readvalue2); + CaptureValue[0] = ((0xFFFF - RiseValue[0]) + FallValue[0]); } - capture_number = 0; + /* Switch states */ + CaptureState[0] = 0; + /* Increase supervisor counter */ + CapCounter[0]++; + + /* Switch polarity of input capture */ + TIM_ICInitTypeDef TIM_ICInitStructure; + TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; + TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; + TIM_ICInitStructure.TIM_ICFilter = 0x0; + + TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; + TIM_ICInitStructure.TIM_Channel = RECEIVER8_CH; + TIM_ICInit(RECEIVER8_TIM_PORT, &TIM_ICInitStructure); } } } -uint32_t PIOS_PWM_Get(void) +/** +* This function handles TIM3 global interrupt request. +*/ +PIOS_PWM_SUPV_IRQ_FUNC { - return CAPTURE; + /* Clear timer interrupt pending bit */ + TIM_ClearITPendingBit(PIOS_PWM_SUPV_TIMER, TIM_IT_Update); + + /* Simple state machine */ + if(SupervisorState == 0) { + /* Save this states values */ + for(int32_t i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + CapCounterPrev[i] = CapCounter[i]; + } + + /* Move to next state */ + SupervisorState = 1; + } else { + /* See what channels have been updated */ + for(int32_t i = 0; i < PIOS_PWM_NUM_INPUTS; i++) { + if(CapCounter[i] == CapCounterPrev[i]) { + CaptureValue[i] = 0; + } + } + + /* Move to next state */ + SupervisorState = 0; + } } #endif diff --git a/flight/PiOS/inc/pios_pwm.h b/flight/PiOS/inc/pios_pwm.h index bacaee426..1c0c5da82 100644 --- a/flight/PiOS/inc/pios_pwm.h +++ b/flight/PiOS/inc/pios_pwm.h @@ -28,6 +28,6 @@ /* Public Functions */ extern void PIOS_PWM_Init(void); -extern uint32_t PIOS_PWM_Get(void); +extern int32_t PIOS_PWM_Get(int8_t Channel); #endif /* PIOS_PWM_H */