Muhammad Ali Mazidi, Shujen Chen, Sarmad Naimi, Sepehr Naimi : Freescale ARM Cortex -M Embedded Programming Joseph Yiu : The Definitive Guide to -M0 a

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1 ARM Cortex - p KEIL MDK 5 Hobbielektronika csoport 2016/2017 1

2 Muhammad Ali Mazidi, Shujen Chen, Sarmad Naimi, Sepehr Naimi : Freescale ARM Cortex -M Embedded Programming Joseph Yiu : The Definitive Guide to -M0 and Cortex -M0+ Processors (2nd Ed.) ARM University Program: Course / Lab Material for Teaching Embedded Systems/MCUs (for the FRDM -KL25Z board ) Trevor Martin: The the Cortex -M Processor Family Freescale : MKL25Z128VLK4 MCU datasheet Freescale : KL25 Sub -Family Reference Manual Freescale : FRDM -KL25Z User Manual Freescale : KLQRUG - Kinetis L Peripheral Module Quick Reference User 's Guide Freescale : AN Power Management for Kinetis MCUs Hobbielektronika csoport 2016/2017 2

3 LPTMR PIT Periodikus MCG WIC Wake -up Interrupt Controller Hobbielektronika csoport 2016/2017 3

4 16 bit es N 16) VLLS0 ) LPTMR 0 _CSR regis z ter : LPTMR 0 _PSR regis z ter : LPTMR 0 _CNR regis z ter : LPTRM 0 _CMR Hobbielektronika csoport 2016/2017 4

5 SIM_SCGC5 Az LPTMR - -be SIM_SCGC5 CMSIS SIM_SCGC5 = SIM_SCGC5_LPTMR_MASK; a hol a SIM_SCGC5_LPTMR_MASK - # define SIM_SCGC5_LPTMR_MASK 0x1u Hobbielektronika csoport 2016/2017 5

6 TCF: Timer Compare Flag 1 -be TIE : Timer Interrupt Enable (0: letiltva, 1: TCF == 1 ) TPS: Timer Pin Select 00: CMP0 kimenet, 01: LPTMR0_ALT1 (PTA19/Alt6), 10: LPTMR0_ALT2 (PTC5/Alt3), ) ) TPP: Timer Pin Polarity (0: 1: TFC: Timer Free Runner 0: 1: TMS: Timer Mode Select 0: 1: TEN: Timer Enable 0: tilt, 1: Hobbielektronika csoport 2016/2017 6

7 PRESCALE: : 2 PRESCALE+1 : 2 PRESCALE PBYP: 0 : 1 : PCS: 00: MCGIRCLK, 01: LPO 1 khz, 10: ERCLK32K, 11: OSCERCLK) KL25 Sub -Family Reference Manual Hobbielektronika csoport 2016/2017 7

8 Az LPTMR0 A CNR LPTMR0. pszeudo LPTMR - >CNR = 0; adat = LPTMR - >CNR ; Ha az LPTMR0 LPTMR0_CNR az LPTMR0_CMR LPTMR0_CSR[TCF] -be Ha LPTMR0_CSR[TFC] = 0, TCF LPTMR0_CNR Hobbielektronika csoport 2016/2017 8

9 LPTMR - rel LPTMR0 Az LPTMR0 az 1 khz -es LPO. PTB19 # include <MKL25Z4.H> # define bit(x) (1<<x) void delayms (uint16_t n); int main ( void ) { SIM - >SCGC5 = SIM_SCGC5_PORTB_MASK; // A GPIOB port } PORTB - PTB - >PDDR = bit(19); // PTB19 legyen kimenet! while (1) { } delayms (1000); // 1000 ms PTB - void delayms (uint16_t n) { // 1 if (n > 0) { LPTMR0 - LPTMR0 - LPTMR0 - >PSR = LPTMR_PSR_PBYP_MASK; // LPTMR0 - >CMR = n; LPTMR0 - while (!(LPTMR0 - >CSR & LPTMR_CSR_TCF_MASK)); // TCF - re LPTMR0 - >CSR = LPTMR_CSR_TCF_MASK; // } } Hobbielektronika csoport 2016/2017 9

10 Az ARM Cortex -M0+ sleep ) deep sleep with WIC ) eep sleep with SRPG support using WIC ) NVIC modul kezeli a WIC modul Hobbielektronika csoport 2016/

11 Kinetis L e Hobbielektronika csoport 2016/

12 Kinetis 1. Run 2. Very Low Power Run (VLPR) max. 4/1 MHz ) 3. Wait A CPU alszik, az NVIC, 4. Very Low Power Wait (VLPW) a CPU alszik, NVIC 5. Stop, NVIC letiltva, WIC letiltva 6. Very Low Power Stop (VLPS), NVIC letiltva, WIC letiltva, SRAM 7. Low Leakage Stop (LLS), NVIC letiltva, LLWU, SRAM 8. Very Low Leakage Stop3 (VLLS3), NVIC letiltva, LLWU, SRAM 9. Very Low Leakage Stop 1 (VLLS1), NVIC letiltva, LLWU, a letiltva, SRAM lekapcsolva, modul letiltva. 10. Very Low Leakage Stop 0 (VLLS0), NVIC letiltva, LLWU, a SRAM A KLQRUG Hobbielektronika csoport 2016/

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16 (Joseph Yiu : The Definitive Guide to -M0 and Cortex -M0+ Processors 19.7 alfejezet) Hobbielektronika csoport 2016/

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19 CLOCK_SETUP = 0 MCG CLOCK_SETUP = 2 CLOCK_SETUP = 3 RESET mindig az FEI BLPE Ehhez a FEI FBE BLPE CLOCK_SETUP = 1 SystemInit () Hobbielektronika csoport 2016/

20 LPTMR - rel -t most Very Low -Power Run ( VLPR ) VLPS Low -Power Timer ( LPTMR ) modul -t. A VLPR a CLOCK_SETUP -ra a projekt system _MKL25Z4.h # define CLOCK_SETUP 3 a SytemInit () system _MKL25Z4.c A VLPR SMC - > PMCTRL[RUNM] bitcsoportot 010 -be kell. A VLPS SCB ->SCR SMC -> PMCTRL WFI LPTMR modul VLPS NVIC, hanem a WIC Hobbielektronika csoport 2016/

21 # include <MKL25Z4.H> # define bit(x) (1<<x) Program12_2 A PTB18 LED -et villogtatjuk, k void LPTMR0_ IRQHandler ( void ) { LPTMR0 - >CSR = LPTMR_CSR_TCF_MASK; // A TCF } int main ( void ) { int c; SIM - SIM - >SCGC5 = SIM_SCGC5_PORTB_MASK; // A GPIOB port PORTB - >PCR[18] = PORT_PCR_MUX(1); // PTB18 PTB - >PSOR = bit(18); // kikapcsoljuk a piros LED - et PTB - >PDDR = bit(18); // PTB18 legyen kimenet! wait _ ms (2000); // 2000 ms // --- Az SMC - >PMROT regiszter Reset // SMC - >PMPROT = SMC_PMPROT_AVLP_MASK; // VLPR/VLPS SMC_PMCTRL &= ~SMC_PMCTRL_RUNM_MASK; SMC - >PMCTRL = SMC_PMCTRL_RUNM(2); // Very - Low - Power - Run while ((SMC - >PMSTAT & 0x7F)!=0x04); // VLPR wakeup _ setms ms enable _ irq while (1) { PTB - >PCOR = bit(18); // bekapcsoljuk a piros LED - et wait _ ms (100); // 100 ms PTB - >PSOR = bit(18); // kikapcsoljuk a piros LED - et deepsleep VLPS } } Hobbielektronika csoport 2016/

22 Program12_2 void wakeup _ setms (uint16_t delay ) { LPTMR0 - LPTMR0 - LPTMR0 - >PSR = LPTMR_PSR_PBYP_MASK; // LPTMR0 - >CMR = delay ; LPTMR0 - LPTMR0 - NVIC_ EnableIRQ (LPTMR0_ IRQn ); // LPTMR0 } void deepsleep ( void int dummy ; SCB - >SCR = SCB_SCR_SLEEPDEEP_ Msk deepsleep SMC_PMCTRL &= ~SMC_PMCTRL_STOPM_MASK; SMC - >PMCTRL = SMC_PMCTRL_STOPM(2); // Very - Low - Power dummy = SMC - dummy ++; // kiadjuk a WFI parancsot! } void wait _ ms (int n) { int i; SysTick - >CTRL = 0; // SysTick SysTick - >LOAD = ms SysTick - SysTick - interrupt for (i = 0; i < n; i++) { while (( SysTick - >CTRL & 0x10000) == 0); // A COUNT } SysTick - >CTRL = 0; // SysTick } Hobbielektronika csoport 2016/

23 PIT - Periodic Interrupt Timer Az MKL25Z128VLK4 Hobbielektronika csoport 2016/

24 PIT Interrupt Periodic Interrupt Timer TVL PIT interrupt PIT interrupt PIT interrupt PIT interrupt 1000-et a keletkezik, a keletkezik, a keletkezik, a keletkezik, a a TSV-be! at rel, - TSV-be! at at PIT (TSV) PIT_LDVALn 32 -bit (32 -bit) LDVAL Fix MCG Interrupt (TVL) PIT_CVALn Hobbielektronika csoport 2016/

25 PIT regiszterek LTMR64H LTMR64L PIT_MCR MDIS a PIT FRZ Hobbielektronika csoport 2016/

26 : PIT : PIT ->MCR : PIT ->CHANNEL[n].LDVAL, stb. PIT_LDVALn PIT_CVALn PIT_TCTRLn CHN: o : (PIT ->CHANNEL[n].LDVAL ) : (PIT ->CHANNEL[n].CVAL ) : (PIT ->CHANNEL[n].TCTRL ) 0: o 1: timer n n -1 TIE: TEN: PIT_TFLG o o o o 0: 1: 0: 1: n : TIF: o 1: Hobbielektronika csoport 2016/

27 A PIT modul e SIM - >SCGC6 = SIM_SCGC6_PIT_MASK;, PIT0 PIT - >MCR &= ~PIT_MCR_MDIS_MASK; PIT - >MCR = PIT_MCR_FRZ_MASK; // 0: fut, 1: befagyaszt PIT - >CHANNEL[0].LDVAL = PIT_LDVAL_TSV( ); PIT - >CHANNEL[0].TCTRL &= PIT_TCTRL_CHN_MASK; PIT_LDVAL_TSV () Az n. TCTRL[CHN] - az n. az n -1. Hobbielektronika csoport 2016/

28 T LDV AL = -1 kell, mivel (ahol f count a buszfrekvencia) 0 -ig LDV AL regis z ter : ms - LDV AL = ms * 24 MHz - 1 = Hz LDV = (1/91 Hz)*24 MHz - 1 = round ( ) = Hobbielektronika csoport 2016/

29 Ebben a programban a d elayms () csordul alul. - meg: a CPU frekvencia = 48 MHz, a buszfrekvencia = 24 MHz. LED -et Hobbielektronika csoport 2016/

30 # include <MKL25Z4.h > # define bit(x) (1<<x) void delayms (uint32_t n) { uint32_t timeout ; timeout = PIT - >CHANNEL[1].CVAL - while (PIT - >CHANNEL[1].CVAL > timeout } uint32_t bus _ frequency ( void ) { return ( SystemCoreClock /((( SIM - >CLKDIV1 & SIM_CLKDIV1_OUTDIV4_MASK )>>SIM_CLKDIV1_OUTDIV4_SHIFT ) + 1)); } int main ( void ) { // PIT_MCR = 0; // PIT - >CHANNEL[1].LDVAL = 0xFFFFFFFF; PIT - PIT - // PIT - >CHANNEL[0].LDVAL = ( bus _ frequency () + 500)/1000-1; PIT - // SIM - PORTD - PTD - >PDDR = bit(1); // PTD1 kimenet legyen } Program12_3 while (1) { delayms (1000); // 1000 ms PTD - } Hobbielektronika csoport 2016/