Diff: Device/WakeUp_Freescale.cpp

Revision:

23:026ce8177010

Parent:

22:49ca85e8822f

--- a/Device/WakeUp_Freescale.cpp	Wed Nov 11 20:20:27 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,135 +0,0 @@
-#if defined(TARGET_Freescale)
-
-#include "WakeUp.h"
-#include "us_ticker_api.h"
-
-FunctionPointer WakeUp::callback;
-float WakeUp::cycles_per_ms = 1.0;
-
-static uint16_t remainder_count;
-static uint32_t oldvector;
-static uint8_t oldPSR;
-
-//See if we have a 32kHz crystal on the clock input
-//Check if the DMX32 bit is set, not perfect, but most cases will work
-static inline bool is32kXtal(void) {
-    return (MCG->C4 & MCG_C4_DMX32_MASK);
-}
-
-void restore(void);
-
-void WakeUp::set_ms(uint32_t ms)
-{
-    /* Clock the timer */
-    SIM->SCGC5 |= 0x1u;
-    
-    //Check if it is running, in that case, store current values
-    remainder_count = 0;
-    if (NVIC_GetVector(LPTimer_IRQn) != (uint32_t)WakeUp::irq_handler) {
-        oldvector = NVIC_GetVector(LPTimer_IRQn);
-        oldPSR = LPTMR0->PSR;
-        
-        if (LPTMR0->CSR & LPTMR_CSR_TIE_MASK) {
-            //Write first to sync value
-            LPTMR0->CNR = 0;
-            uint16_t countval = LPTMR0->CNR;
-            if (countval < LPTMR0->CMR)
-                remainder_count = countval - LPTMR0->CMR;
-        }
-    }
-    
-    LPTMR0->CSR = 0;
-
-    if (ms != 0) {
-        /* Set interrupt handler */
-        NVIC_SetVector(LPTimer_IRQn, (uint32_t)WakeUp::irq_handler);
-        NVIC_EnableIRQ(LPTimer_IRQn);
-        
-        uint32_t counts;
-        //Set clock
-        if (is32kXtal()) {
-            SIM->SOPT1 &= ~SIM_SOPT1_OSC32KSEL_MASK;    //Put RTC/LPTMR on 32kHz external. 
-            #ifdef OSC0
-            OSC0->CR |= OSC_CR_EREFSTEN_MASK;
-            #else
-            OSC->CR |= OSC_CR_EREFSTEN_MASK;
-            #endif
-            LPTMR0->PSR = LPTMR_PSR_PCS(2);
-            counts = (uint32_t)((float)ms * 32.768f);
-        } else {
-            //Clock from the 1kHz LPO
-            LPTMR0->PSR = LPTMR_PSR_PCS(1);
-            counts = (uint32_t)((float)ms * cycles_per_ms);
-        }
-        
-        //If no prescaler is needed
-        if (counts <= 0xFFFF) 
-            LPTMR0->PSR |= LPTMR_PSR_PBYP_MASK;
-        else {        //Otherwise increase prescaler until it fits
-            counts >>= 1;
-            uint32_t prescaler = 0;
-            while (counts > 0xFFFF) {
-                counts >>= 1;
-                prescaler++;
-            }
-            LPTMR0->PSR |= LPTMR_PSR_PRESCALE(prescaler);
-        }
-        LPTMR0->CMR = counts;        
-
-        LPTMR0->CSR = LPTMR_CSR_TIE_MASK;
-        LPTMR0->CSR |= LPTMR_CSR_TEN_MASK;
-    } else {
-        restore();
-    }
-
-}
-
-
-void WakeUp::irq_handler(void)
-{
-    // write 1 to TCF to clear the LPT timer compare flag
-    LPTMR0->CSR |= LPTMR_CSR_TCF_MASK;
-    restore();
-    callback.call();
-}
-
-void WakeUp::calibrate(void)
-{
-    if (!is32kXtal()) {
-        wait_us(1);     //Otherwise next wait might overwrite our settings
-        cycles_per_ms = 1.0;
-        set_ms(1100);
-        wait_ms(100);
-    
-        //Write first to sync value
-        LPTMR0->CNR = 0;
-        uint32_t ticks = LPTMR0->CNR;
-        cycles_per_ms = ticks / 100.0;
-        set_ms(0);
-    }
-}
-
-void restore(void){
-    /* Reset */
-    LPTMR0->CSR = 0;
-    
-    /* Set interrupt handler */
-    NVIC_SetVector(LPTimer_IRQn, oldvector);
-    NVIC_EnableIRQ(LPTimer_IRQn);
-    
-    /* Clock at (1)MHz -> (1)tick/us */
-    LPTMR0->PSR = oldPSR;
-
-    if (remainder_count) {  
-        /* Set the compare register */
-        LPTMR0->CMR = remainder_count;
-        
-        /* Enable interrupt */
-        LPTMR0->CSR |= LPTMR_CSR_TIE_MASK;
-        
-        /* Start the timer */
-        LPTMR0->CSR |= LPTMR_CSR_TEN_MASK;
-    }
-}
-
-#endif
\ No newline at end of file