diff options
Diffstat (limited to 'tmk_core/common/chibios/sleep_led.c')
| -rw-r--r-- | tmk_core/common/chibios/sleep_led.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/tmk_core/common/chibios/sleep_led.c b/tmk_core/common/chibios/sleep_led.c deleted file mode 100644 index 477056a454..0000000000 --- a/tmk_core/common/chibios/sleep_led.c +++ /dev/null @@ -1,192 +0,0 @@ -#include <ch.h> -#include <hal.h> - -#include "led.h" -#include "sleep_led.h" - -/* All right, we go the "software" way: timer, toggle LED in interrupt. - * Based on hasu's code for AVRs. - * Use LP timer on Kinetises, TIM14 on STM32F0. - */ - -#ifndef SLEEP_LED_GPT_DRIVER -# if defined(STM32F0XX) -# define SLEEP_LED_GPT_DRIVER GPTD14 -# endif -#endif - -#if defined(KL2x) || defined(K20x) || defined(SLEEP_LED_GPT_DRIVER) /* common parts for timers/interrupts */ - -/* Breathing Sleep LED brighness(PWM On period) table - * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle - * - * http://www.wolframalpha.com/input/?i=%28sin%28+x%2F64*pi%29**8+*+255%2C+x%3D0+to+63 - * (0..63).each {|x| p ((sin(x/64.0*PI)**8)*255).to_i } - */ -static const uint8_t breathing_table[64] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 10, 15, 23, 32, 44, 58, 74, 93, 113, 135, 157, 179, 199, 218, 233, 245, 252, 255, 252, 245, 233, 218, 199, 179, 157, 135, 113, 93, 74, 58, 44, 32, 23, 15, 10, 6, 4, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; - -void sleep_led_timer_callback(void) { - /* Software PWM - * timer:1111 1111 1111 1111 - * \_____/\/ \_______/____ count(0-255) - * \ \______________ duration of step(4) - * \__________________ index of step table(0-63) - */ - - // this works for cca 65536 irqs/sec - static union { - uint16_t row; - struct { - uint8_t count : 8; - uint8_t duration : 2; - uint8_t index : 6; - } pwm; - } timer = {.row = 0}; - - timer.row++; - - // LED on - if (timer.pwm.count == 0) { - led_set(1 << USB_LED_CAPS_LOCK); - } - // LED off - if (timer.pwm.count == breathing_table[timer.pwm.index]) { - led_set(0); - } -} - -#endif /* common parts for known platforms */ - -#if defined(KL2x) || defined(K20x) /* platform selection: familiar Kinetis chips */ - -/* Use Low Power Timer (LPTMR) */ -# define TIMER_INTERRUPT_VECTOR KINETIS_LPTMR0_IRQ_VECTOR -# define RESET_COUNTER LPTMR0->CSR |= LPTMRx_CSR_TCF - -/* LPTMR clock options */ -# define LPTMR_CLOCK_MCGIRCLK 0 /* 4MHz clock */ -# define LPTMR_CLOCK_LPO 1 /* 1kHz clock */ -# define LPTMR_CLOCK_ERCLK32K 2 /* external 32kHz crystal */ -# define LPTMR_CLOCK_OSCERCLK 3 /* output from OSC */ - -/* Work around inconsistencies in Freescale naming */ -# if !defined(SIM_SCGC5_LPTMR) -# define SIM_SCGC5_LPTMR SIM_SCGC5_LPTIMER -# endif - -/* interrupt handler */ -OSAL_IRQ_HANDLER(TIMER_INTERRUPT_VECTOR) { - OSAL_IRQ_PROLOGUE(); - - sleep_led_timer_callback(); - - /* Reset the counter */ - RESET_COUNTER; - - OSAL_IRQ_EPILOGUE(); -} - -/* Initialise the timer */ -void sleep_led_init(void) { - /* Make sure the clock to the LPTMR is enabled */ - SIM->SCGC5 |= SIM_SCGC5_LPTMR; - /* Reset LPTMR settings */ - LPTMR0->CSR = 0; - /* Set the compare value */ - LPTMR0->CMR = 0; // trigger on counter value (i.e. every time) - -/* Set up clock source and prescaler */ -/* Software PWM - * ______ ______ __ - * | ON |___OFF___| ON |___OFF___| .... - * |<-------------->|<-------------->|<- .... - * PWM period PWM period - * - * R interrupts/period[resolution] - * F periods/second[frequency] - * R * F interrupts/second - */ - -/* === OPTION 1 === */ -# if 0 - // 1kHz LPO - // No prescaler => 1024 irqs/sec - // Note: this is too slow for a smooth breathe - LPTMR0->PSR = LPTMRx_PSR_PCS(LPTMR_CLOCK_LPO)|LPTMRx_PSR_PBYP; -# endif /* OPTION 1 */ - -/* === OPTION 2 === */ -# if 1 - // nMHz IRC (n=4 on KL25Z, KL26Z and K20x; n=2 or 8 on KL27Z) - MCG->C2 |= MCG_C2_IRCS; // fast (4MHz) internal ref clock -# if defined(KL27) // divide the 8MHz IRC by 2, to have the same MCGIRCLK speed as others - MCG->MC |= MCG_MC_LIRC_DIV2_DIV2; -# endif /* KL27 */ - MCG->C1 |= MCG_C1_IRCLKEN; // enable internal ref clock - // to work in stop mode, also MCG_C1_IREFSTEN - // Divide 4MHz by 2^N (N=6) => 62500 irqs/sec => - // => approx F=61, R=256, duration = 4 - LPTMR0->PSR = LPTMRx_PSR_PCS(LPTMR_CLOCK_MCGIRCLK) | LPTMRx_PSR_PRESCALE(6); -# endif /* OPTION 2 */ - -/* === OPTION 3 === */ -# if 0 - // OSC output (external crystal), usually 8MHz or 16MHz - OSC0->CR |= OSC_CR_ERCLKEN; // enable ext ref clock - // to work in stop mode, also OSC_CR_EREFSTEN - // Divide by 2^N - LPTMR0->PSR = LPTMRx_PSR_PCS(LPTMR_CLOCK_OSCERCLK)|LPTMRx_PSR_PRESCALE(7); -# endif /* OPTION 3 */ - /* === END OPTIONS === */ - - /* Interrupt on TCF set (compare flag) */ - nvicEnableVector(LPTMR0_IRQn, 2); // vector, priority - LPTMR0->CSR |= LPTMRx_CSR_TIE; -} - -void sleep_led_enable(void) { - /* Enable the timer */ - LPTMR0->CSR |= LPTMRx_CSR_TEN; -} - -void sleep_led_disable(void) { - /* Disable the timer */ - LPTMR0->CSR &= ~LPTMRx_CSR_TEN; -} - -void sleep_led_toggle(void) { - /* Toggle the timer */ - LPTMR0->CSR ^= LPTMRx_CSR_TEN; -} - -#elif defined(SLEEP_LED_GPT_DRIVER) - -static void gptTimerCallback(GPTDriver *gptp) { - (void)gptp; - sleep_led_timer_callback(); -} - -static const GPTConfig gptcfg = {1000000, gptTimerCallback, 0, 0}; - -/* Initialise the timer */ -void sleep_led_init(void) { gptStart(&SLEEP_LED_GPT_DRIVER, &gptcfg); } - -void sleep_led_enable(void) { gptStartContinuous(&SLEEP_LED_GPT_DRIVER, gptcfg.frequency / 0xFFFF); } - -void sleep_led_disable(void) { gptStopTimer(&SLEEP_LED_GPT_DRIVER); } - -void sleep_led_toggle(void) { (SLEEP_LED_GPT_DRIVER.state == GPT_READY) ? sleep_led_enable() : sleep_led_disable(); } - -#else /* platform selection: not on familiar chips */ - -void sleep_led_init(void) {} - -void sleep_led_enable(void) { led_set(1 << USB_LED_CAPS_LOCK); } - -void sleep_led_disable(void) { led_set(0); } - -void sleep_led_toggle(void) { - // not implemented -} - -#endif /* platform selection */ |