From df18715f17db9273f45f880d7ba390b983eb8869 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sat, 26 Jul 2014 09:24:53 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7100 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/ports/AVR/pwm_lld.c | 990 ++++++++++++++++++++++----------------------- 1 file changed, 495 insertions(+), 495 deletions(-) (limited to 'os/hal/ports/AVR/pwm_lld.c') diff --git a/os/hal/ports/AVR/pwm_lld.c b/os/hal/ports/AVR/pwm_lld.c index 450d57b78..7a5dc014e 100644 --- a/os/hal/ports/AVR/pwm_lld.c +++ b/os/hal/ports/AVR/pwm_lld.c @@ -1,495 +1,495 @@ -/* - ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -*/ - -/* - This driver is based on the work done by Matteo Serva available at - http://github.com/matteoserva/ChibiOS-AVR -*/ - -/** - * @file AVR/pwm_lld.c - * @brief AVR PWM driver subsystem low level driver. - * - * @addtogroup PWM - * @{ - */ - -#include "hal.h" - -#if HAL_USE_PWM || defined(__DOXYGEN__) - -/*===========================================================================*/ -/* Driver local definitions. */ -/*===========================================================================*/ - -typedef struct { - volatile uint8_t *tccra; - volatile uint8_t *tccrb; - volatile uint8_t *ocrah; - volatile uint8_t *ocral; - volatile uint8_t *ocrbh; - volatile uint8_t *ocrbl; - volatile uint8_t *ocrch; - volatile uint8_t *ocrcl; - volatile uint8_t *tifr; - volatile uint8_t *timsk; -} timer_registers_t; - -static timer_registers_t regs_table[]= -{ -#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) -#if defined(OCR1C) - {&TCCR1A, &TCCR1B, &OCR1AH, &OCR1AL, &OCR1BH, &OCR1BL, &OCR1CH, &OCR1CL, &TIFR1, &TIMSK1}, -#else - {&TCCR1A, &TCCR1B, &OCR1AH, &OCR1AL, &OCR1BH, &OCR1BL, NULL, NULL, &TIFR1, &TIMSK1}, -#endif -#endif -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) - {&TCCR2A, &TCCR2B, &OCR2A, &OCR2A, &OCR2B, &OCR2B, NULL, NULL, &TIFR2, &TIMSK2}, -#endif -#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) - {&TCCR3A, &TCCR3B, &OCR3AH, &OCR3AL, &OCR3BH, &OCR3BL, &OCR3CH, &OCR3CL, &TIFR3, &TIMSK3}, -#endif -#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) - {&TCCR4A, &TCCR4B, &OCR4AH, &OCR4AL, &OCR4CH, &OCR4CL, &OCR4CH, &OCR4CL, &TIFR4, &TIMSK4}, -#endif -#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) - {&TCCR5A, &TCCR5B, &OCR5AH, &OCR5AL, &OCR5BH, &OCR5BL, &OCR5CH, &OCR5CL, &TIFR5, &TIMSK5}, -#endif -}; - -/*===========================================================================*/ -/* Driver exported variables. */ -/*===========================================================================*/ - -/** @brief PWM driver identifiers.*/ -#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) -PWMDriver PWMD1; -#endif -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) -PWMDriver PWMD2; -#endif -#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) -PWMDriver PWMD3; -#endif -#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) -PWMDriver PWMD4; -#endif -#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) -PWMDriver PWMD5; -#endif - -/*===========================================================================*/ -/* Driver local variables. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Driver local functions. */ -/*===========================================================================*/ - -static void config_channel(volatile uint8_t *tccra, - uint8_t com1, - uint8_t com0, - pwmmode_t mode) -{ - *tccra &= ~((1 << com1) | (1 << com0)); - if (mode == PWM_OUTPUT_ACTIVE_HIGH) - *tccra |= ((1 << com1) | (0 << com0)); /* non inverting mode */ - else if (mode == PWM_OUTPUT_ACTIVE_LOW) - *tccra |= (1 << com1) | (1 << com0); /* inverting mode */ -} - -static uint8_t timer_index(PWMDriver *pwmp) -{ - uint8_t index = 0; - -#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) - if (pwmp == &PWMD1) return index; - else index++; -#endif -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) - if (pwmp == &PWMD2) return index; - else index++; -#endif -#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) - if (pwmp == &PWMD3) return index; - else index++; -#endif -#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) - if (pwmp == &PWMD4) return index; - else index++; -#endif -#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) - if (pwmp == &PWMD5) return index; - else index++; -#endif - - /* This is an error! */ - return index; -} - -/*===========================================================================*/ -/* Driver interrupt handlers. */ -/*===========================================================================*/ - -/* - * interrupt for compare1&2 and clock overflow. pwmd1 & pwmd2 - */ -#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) -OSAL_IRQ_HANDLER(TIMER1_OVF_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD1.config->callback(&PWMD1); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER1_COMPA_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD1.config->channels[0].callback(&PWMD1); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER1_COMPB_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD1.config->channels[1].callback(&PWMD1); - OSAL_IRQ_EPILOGUE(); -} -#if PWM_CHANNELS > 2 -OSAL_IRQ_HANDLER(TIMER1_COMPC_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD1.config->channels[2].callback(&PWMD1); - OSAL_IRQ_EPILOGUE(); -} -#endif -#endif - -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) -OSAL_IRQ_HANDLER(TIMER2_OVF_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD2.config->callback(&PWMD2); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER2_COMPA_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD2.config->channels[0].callback(&PWMD2); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER2_COMPB_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD2.config->channels[1].callback(&PWMD2); - OSAL_IRQ_EPILOGUE(); -} -#endif - -#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) -OSAL_IRQ_HANDLER(TIMER3_OVF_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD3.config->callback(&PWMD3); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER3_COMPA_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD3.config->channels[0].callback(&PWMD3); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER3_COMPB_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD3.config->channels[1].callback(&PWMD3); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER3_COMPC_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD3.config->channels[2].callback(&PWMD3); - OSAL_IRQ_EPILOGUE(); -} -#endif - -#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) -OSAL_IRQ_HANDLER(TIMER4_OVF_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD4.config->callback(&PWMD4); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER4_COMPA_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD4.config->channels[0].callback(&PWMD4); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER4_COMPB_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD4.config->channels[1].callback(&PWMD4); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER4_COMPC_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD4.config->channels[2].callback(&PWMD4); - OSAL_IRQ_EPILOGUE(); -} -#endif - -#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) -OSAL_IRQ_HANDLER(TIMER5_OVF_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD5.config->callback(&PWMD5); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER5_COMPA_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD5.config->channels[0].callback(&PWMD5); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER5_COMPB_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD5.config->channels[1].callback(&PWMD5); - OSAL_IRQ_EPILOGUE(); -} - -OSAL_IRQ_HANDLER(TIMER5_COMPC_vect) -{ - OSAL_IRQ_PROLOGUE(); - PWMD5.config->channels[2].callback(&PWMD5); - OSAL_IRQ_EPILOGUE(); -} -#endif - -/*===========================================================================*/ -/* Driver exported functions. */ -/*===========================================================================*/ - -/** - * @brief Low level PWM driver initialization. - * - * @notapi - */ -void pwm_lld_init(void) -{ -#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) - pwmObjectInit(&PWMD1); - TCCR1A = (1 << WGM11) | (1 << WGM10); - TCCR1B = (0 << WGM13) | (1 << WGM12); -#endif - -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) - pwmObjectInit(&PWMD2); - TCCR2A = (1 << WGM21) | (1 << WGM20); - TCCR2B = (0 << WGM22); -#endif - -#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) - pwmObjectInit(&PWMD3); - TCCR3A = (1 << WGM31) | (1 << WGM30); - TCCR3B = (0 << WGM33) | (1 << WGM32); -#endif - -#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) - pwmObjectInit(&PWMD4); - TCCR4A = (1 << WGM41) | (1 << WGM40); - TCCR4B = (0 << WGM43) | (1 << WGM42); -#endif - -#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) - pwmObjectInit(&PWMD5); - TCCR5A = (1 << WGM51) | (1 << WGM50); - TCCR5B = (0 << WGM53) | (1 << WGM52); -#endif -} - -/** - * @brief Configures and activates the PWM peripheral. - * - * @param[in] pwmp pointer to the @p PWMDriver object - * - * @notapi - */ -void pwm_lld_start(PWMDriver *pwmp) -{ - if (pwmp->state == PWM_STOP) { - -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) - if (pwmp == &PWMD2) { - TCCR2B &= ~((1 << CS22) | (1 << CS21)); - TCCR2B |= (1 << CS20); - if (pwmp->config->callback != NULL) - TIMSK2 |= (1 << TOIE2); - return; - } -#endif - - /* TODO: support other prescaler options */ - - uint8_t i = timer_index(pwmp); - *regs_table[i].tccrb &= ~(1 << CS11); - *regs_table[i].tccrb |= (1 << CS12) | (1 << CS10); - *regs_table[i].timsk = (1 << TOIE1); - } -} - -/** - * @brief Deactivates the PWM peripheral. - * - * @param[in] pwmp pointer to the @p PWMDriver object - * - * @notapi - */ -void pwm_lld_stop(PWMDriver *pwmp) -{ - uint8_t i = timer_index(pwmp); - *regs_table[i].tccrb &= ~((1 << CS12) | (1 << CS11) | (1 << CS10)); - *regs_table[i].timsk = 0; -} - -/** - * @brief Changes the period the PWM peripheral. - * @details This function changes the period of a PWM unit that has already - * been activated using @p pwmStart(). - * @pre The PWM unit must have been activated using @p pwmStart(). - * @post The PWM unit period is changed to the new value. - * @note The function has effect at the next cycle start. - * @note If a period is specified that is shorter than the pulse width - * programmed in one of the channels then the behavior is not - * guaranteed. - * - * @param[in] pwmp pointer to a @p PWMDriver object - * @param[in] period new cycle time in ticks - * - * @notapi - */ -void pwm_lld_change_period(PWMDriver *pwmp, pwmcnt_t period) -{ -} - -/** - * @brief Enables a PWM channel. - * @pre The PWM unit must have been activated using @p pwmStart(). - * @post The channel is active using the specified configuration. - * @note Depending on the hardware implementation this function has - * effect starting on the next cycle (recommended implementation) - * or immediately (fallback implementation). - * - * @param[in] pwmp pointer to a @p PWMDriver object - * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1) - * @param[in] width PWM pulse width as clock pulses number - * - * @notapi - */ -void pwm_lld_enable_channel(PWMDriver *pwmp, - pwmchannel_t channel, - pwmcnt_t width) -{ - uint16_t val = width; - if (val > MAX_PWM_VALUE) - val = MAX_PWM_VALUE; - -#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) - if (pwmp == &PWMD2) { - config_channel(&TCCR2A, - 7 - 2*channel, - 6 - 2*channel, - pwmp->config->channels[channel].mode); - TIMSK2 |= (1 << (channel + 1)); - /* Timer 2 is 8 bit */ - if (val > 0xFF) - val = 0xFF; - if (pwmp->config->channels[channel].callback) { - switch (channel) { - case 0: OCR2A = val; break; - case 1: OCR2B = val; break; - } - } - return; - } -#endif - - uint8_t i = timer_index(pwmp); - config_channel(regs_table[i].tccra, - 7 - 2*channel, - 6 - 2*channel, - pwmp->config->channels[channel].mode); - volatile uint8_t *ocrh, *ocrl; - switch (channel) { - case 1: - ocrh = regs_table[i].ocrbh; - ocrl = regs_table[i].ocrbl; - break; - case 2: - ocrh = regs_table[i].ocrch; - ocrl = regs_table[i].ocrcl; - break; - default: - ocrh = regs_table[i].ocrah; - ocrl = regs_table[i].ocral; - } - *ocrh = val >> 8; - *ocrl = val & 0xFF; - *regs_table[i].tifr |= (1 << (channel + 1)); - if (pwmp->config->channels[channel].callback) - *regs_table[i].timsk |= (1 << (channel + 1)); -} - -/** - * @brief Disables a PWM channel. - * @pre The PWM unit must have been activated using @p pwmStart(). - * @post The channel is disabled and its output line returned to the - * idle state. - * @note Depending on the hardware implementation this function has - * effect starting on the next cycle (recommended implementation) - * or immediately (fallback implementation). - * - * @param[in] pwmp pointer to a @p PWMDriver object - * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1) - * - * @notapi - */ -void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) -{ - uint8_t i = timer_index(pwmp); - config_channel(regs_table[i].tccra, - 7 - 2*channel, - 6 - 2*channel, - PWM_OUTPUT_DISABLED); - *regs_table[i].timsk &= ~(1 << (channel + 1)); -} - -#endif /* HAL_USE_PWM */ - -/** @} */ +/* + ChibiOS/HAL - Copyright (C) 2006-2014 Giovanni Di Sirio + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +/* + This driver is based on the work done by Matteo Serva available at + http://github.com/matteoserva/ChibiOS-AVR +*/ + +/** + * @file AVR/pwm_lld.c + * @brief AVR PWM driver subsystem low level driver. + * + * @addtogroup PWM + * @{ + */ + +#include "hal.h" + +#if HAL_USE_PWM || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +typedef struct { + volatile uint8_t *tccra; + volatile uint8_t *tccrb; + volatile uint8_t *ocrah; + volatile uint8_t *ocral; + volatile uint8_t *ocrbh; + volatile uint8_t *ocrbl; + volatile uint8_t *ocrch; + volatile uint8_t *ocrcl; + volatile uint8_t *tifr; + volatile uint8_t *timsk; +} timer_registers_t; + +static timer_registers_t regs_table[]= +{ +#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) +#if defined(OCR1C) + {&TCCR1A, &TCCR1B, &OCR1AH, &OCR1AL, &OCR1BH, &OCR1BL, &OCR1CH, &OCR1CL, &TIFR1, &TIMSK1}, +#else + {&TCCR1A, &TCCR1B, &OCR1AH, &OCR1AL, &OCR1BH, &OCR1BL, NULL, NULL, &TIFR1, &TIMSK1}, +#endif +#endif +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) + {&TCCR2A, &TCCR2B, &OCR2A, &OCR2A, &OCR2B, &OCR2B, NULL, NULL, &TIFR2, &TIMSK2}, +#endif +#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) + {&TCCR3A, &TCCR3B, &OCR3AH, &OCR3AL, &OCR3BH, &OCR3BL, &OCR3CH, &OCR3CL, &TIFR3, &TIMSK3}, +#endif +#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) + {&TCCR4A, &TCCR4B, &OCR4AH, &OCR4AL, &OCR4CH, &OCR4CL, &OCR4CH, &OCR4CL, &TIFR4, &TIMSK4}, +#endif +#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) + {&TCCR5A, &TCCR5B, &OCR5AH, &OCR5AL, &OCR5BH, &OCR5BL, &OCR5CH, &OCR5CL, &TIFR5, &TIMSK5}, +#endif +}; + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/** @brief PWM driver identifiers.*/ +#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) +PWMDriver PWMD1; +#endif +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) +PWMDriver PWMD2; +#endif +#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) +PWMDriver PWMD3; +#endif +#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) +PWMDriver PWMD4; +#endif +#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) +PWMDriver PWMD5; +#endif + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +static void config_channel(volatile uint8_t *tccra, + uint8_t com1, + uint8_t com0, + pwmmode_t mode) +{ + *tccra &= ~((1 << com1) | (1 << com0)); + if (mode == PWM_OUTPUT_ACTIVE_HIGH) + *tccra |= ((1 << com1) | (0 << com0)); /* non inverting mode */ + else if (mode == PWM_OUTPUT_ACTIVE_LOW) + *tccra |= (1 << com1) | (1 << com0); /* inverting mode */ +} + +static uint8_t timer_index(PWMDriver *pwmp) +{ + uint8_t index = 0; + +#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) + if (pwmp == &PWMD1) return index; + else index++; +#endif +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) + if (pwmp == &PWMD2) return index; + else index++; +#endif +#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) + if (pwmp == &PWMD3) return index; + else index++; +#endif +#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) + if (pwmp == &PWMD4) return index; + else index++; +#endif +#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) + if (pwmp == &PWMD5) return index; + else index++; +#endif + + /* This is an error! */ + return index; +} + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +/* + * interrupt for compare1&2 and clock overflow. pwmd1 & pwmd2 + */ +#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(TIMER1_OVF_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD1.config->callback(&PWMD1); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER1_COMPA_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD1.config->channels[0].callback(&PWMD1); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER1_COMPB_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD1.config->channels[1].callback(&PWMD1); + OSAL_IRQ_EPILOGUE(); +} +#if PWM_CHANNELS > 2 +OSAL_IRQ_HANDLER(TIMER1_COMPC_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD1.config->channels[2].callback(&PWMD1); + OSAL_IRQ_EPILOGUE(); +} +#endif +#endif + +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(TIMER2_OVF_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD2.config->callback(&PWMD2); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER2_COMPA_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD2.config->channels[0].callback(&PWMD2); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER2_COMPB_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD2.config->channels[1].callback(&PWMD2); + OSAL_IRQ_EPILOGUE(); +} +#endif + +#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(TIMER3_OVF_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD3.config->callback(&PWMD3); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER3_COMPA_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD3.config->channels[0].callback(&PWMD3); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER3_COMPB_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD3.config->channels[1].callback(&PWMD3); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER3_COMPC_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD3.config->channels[2].callback(&PWMD3); + OSAL_IRQ_EPILOGUE(); +} +#endif + +#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(TIMER4_OVF_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD4.config->callback(&PWMD4); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER4_COMPA_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD4.config->channels[0].callback(&PWMD4); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER4_COMPB_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD4.config->channels[1].callback(&PWMD4); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER4_COMPC_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD4.config->channels[2].callback(&PWMD4); + OSAL_IRQ_EPILOGUE(); +} +#endif + +#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(TIMER5_OVF_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD5.config->callback(&PWMD5); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER5_COMPA_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD5.config->channels[0].callback(&PWMD5); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER5_COMPB_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD5.config->channels[1].callback(&PWMD5); + OSAL_IRQ_EPILOGUE(); +} + +OSAL_IRQ_HANDLER(TIMER5_COMPC_vect) +{ + OSAL_IRQ_PROLOGUE(); + PWMD5.config->channels[2].callback(&PWMD5); + OSAL_IRQ_EPILOGUE(); +} +#endif + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Low level PWM driver initialization. + * + * @notapi + */ +void pwm_lld_init(void) +{ +#if AVR_PWM_USE_TIM1 || defined(__DOXYGEN__) + pwmObjectInit(&PWMD1); + TCCR1A = (1 << WGM11) | (1 << WGM10); + TCCR1B = (0 << WGM13) | (1 << WGM12); +#endif + +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) + pwmObjectInit(&PWMD2); + TCCR2A = (1 << WGM21) | (1 << WGM20); + TCCR2B = (0 << WGM22); +#endif + +#if AVR_PWM_USE_TIM3 || defined(__DOXYGEN__) + pwmObjectInit(&PWMD3); + TCCR3A = (1 << WGM31) | (1 << WGM30); + TCCR3B = (0 << WGM33) | (1 << WGM32); +#endif + +#if AVR_PWM_USE_TIM4 || defined(__DOXYGEN__) + pwmObjectInit(&PWMD4); + TCCR4A = (1 << WGM41) | (1 << WGM40); + TCCR4B = (0 << WGM43) | (1 << WGM42); +#endif + +#if AVR_PWM_USE_TIM5 || defined(__DOXYGEN__) + pwmObjectInit(&PWMD5); + TCCR5A = (1 << WGM51) | (1 << WGM50); + TCCR5B = (0 << WGM53) | (1 << WGM52); +#endif +} + +/** + * @brief Configures and activates the PWM peripheral. + * + * @param[in] pwmp pointer to the @p PWMDriver object + * + * @notapi + */ +void pwm_lld_start(PWMDriver *pwmp) +{ + if (pwmp->state == PWM_STOP) { + +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) + if (pwmp == &PWMD2) { + TCCR2B &= ~((1 << CS22) | (1 << CS21)); + TCCR2B |= (1 << CS20); + if (pwmp->config->callback != NULL) + TIMSK2 |= (1 << TOIE2); + return; + } +#endif + + /* TODO: support other prescaler options */ + + uint8_t i = timer_index(pwmp); + *regs_table[i].tccrb &= ~(1 << CS11); + *regs_table[i].tccrb |= (1 << CS12) | (1 << CS10); + *regs_table[i].timsk = (1 << TOIE1); + } +} + +/** + * @brief Deactivates the PWM peripheral. + * + * @param[in] pwmp pointer to the @p PWMDriver object + * + * @notapi + */ +void pwm_lld_stop(PWMDriver *pwmp) +{ + uint8_t i = timer_index(pwmp); + *regs_table[i].tccrb &= ~((1 << CS12) | (1 << CS11) | (1 << CS10)); + *regs_table[i].timsk = 0; +} + +/** + * @brief Changes the period the PWM peripheral. + * @details This function changes the period of a PWM unit that has already + * been activated using @p pwmStart(). + * @pre The PWM unit must have been activated using @p pwmStart(). + * @post The PWM unit period is changed to the new value. + * @note The function has effect at the next cycle start. + * @note If a period is specified that is shorter than the pulse width + * programmed in one of the channels then the behavior is not + * guaranteed. + * + * @param[in] pwmp pointer to a @p PWMDriver object + * @param[in] period new cycle time in ticks + * + * @notapi + */ +void pwm_lld_change_period(PWMDriver *pwmp, pwmcnt_t period) +{ +} + +/** + * @brief Enables a PWM channel. + * @pre The PWM unit must have been activated using @p pwmStart(). + * @post The channel is active using the specified configuration. + * @note Depending on the hardware implementation this function has + * effect starting on the next cycle (recommended implementation) + * or immediately (fallback implementation). + * + * @param[in] pwmp pointer to a @p PWMDriver object + * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1) + * @param[in] width PWM pulse width as clock pulses number + * + * @notapi + */ +void pwm_lld_enable_channel(PWMDriver *pwmp, + pwmchannel_t channel, + pwmcnt_t width) +{ + uint16_t val = width; + if (val > MAX_PWM_VALUE) + val = MAX_PWM_VALUE; + +#if AVR_PWM_USE_TIM2 || defined(__DOXYGEN__) + if (pwmp == &PWMD2) { + config_channel(&TCCR2A, + 7 - 2*channel, + 6 - 2*channel, + pwmp->config->channels[channel].mode); + TIMSK2 |= (1 << (channel + 1)); + /* Timer 2 is 8 bit */ + if (val > 0xFF) + val = 0xFF; + if (pwmp->config->channels[channel].callback) { + switch (channel) { + case 0: OCR2A = val; break; + case 1: OCR2B = val; break; + } + } + return; + } +#endif + + uint8_t i = timer_index(pwmp); + config_channel(regs_table[i].tccra, + 7 - 2*channel, + 6 - 2*channel, + pwmp->config->channels[channel].mode); + volatile uint8_t *ocrh, *ocrl; + switch (channel) { + case 1: + ocrh = regs_table[i].ocrbh; + ocrl = regs_table[i].ocrbl; + break; + case 2: + ocrh = regs_table[i].ocrch; + ocrl = regs_table[i].ocrcl; + break; + default: + ocrh = regs_table[i].ocrah; + ocrl = regs_table[i].ocral; + } + *ocrh = val >> 8; + *ocrl = val & 0xFF; + *regs_table[i].tifr |= (1 << (channel + 1)); + if (pwmp->config->channels[channel].callback) + *regs_table[i].timsk |= (1 << (channel + 1)); +} + +/** + * @brief Disables a PWM channel. + * @pre The PWM unit must have been activated using @p pwmStart(). + * @post The channel is disabled and its output line returned to the + * idle state. + * @note Depending on the hardware implementation this function has + * effect starting on the next cycle (recommended implementation) + * or immediately (fallback implementation). + * + * @param[in] pwmp pointer to a @p PWMDriver object + * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1) + * + * @notapi + */ +void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) +{ + uint8_t i = timer_index(pwmp); + config_channel(regs_table[i].tccra, + 7 - 2*channel, + 6 - 2*channel, + PWM_OUTPUT_DISABLED); + *regs_table[i].timsk &= ~(1 << (channel + 1)); +} + +#endif /* HAL_USE_PWM */ + +/** @} */ -- cgit v1.2.3