Helmut Tschemernjak
SX1276GenericLib to support sx1276 bassed LoRa modules, including HopeRF RFM95, Murata CMWX1ZZABZ and Semtech SX1276MB1MAS/SX1276MB1LAS modules
Dependents: DISCO-L072CZ-LRWAN1_LoRa_PingPong DISCO-L072CZ-LRWAN1_LoRa_PingPong DISCO-L072CZ-LRWAN1_LoRa_PingPong DISCO-L072CZ-LRWAN1_LoRa_USB_Rx ... more
Arduino-mbed-APIs/arduino-d21.cpp@77:7f227a4dffe6, 2017-07-31 (annotated)
- Committer:
- Helmut Tschemernjak
- Date:
- Mon Jul 31 16:11:17 2017 +0200
- Revision:
- 77:7f227a4dffe6
- Child:
- 78:9d2cc07d9525
Moved SAMD timer and sleep code into new file arduino-d21.cpp
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Helmut Tschemernjak | 77:7f227a4dffe6 | 1 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 2 | * The file is Licensed under the Apache License, Version 2.0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 3 | * (c) 2017 Helmut Tschemernjak |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 4 | * 30826 Garbsen (Hannover) Germany |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 5 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 6 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 7 | #ifdef ARDUINO |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 8 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 9 | using namespace std; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 10 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 11 | #include "arduino-mbed.h" |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 12 | #include "arduino-util.h" |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 13 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 14 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 15 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 16 | #if defined(__SAMD21G18A__) || defined(__SAMD21J18A__) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 17 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 18 | * __SAMD21J18A__ is the SamD21 Explained Board |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 19 | * __SAMD21G18A__ is Genuino Zero-Board (compatible with the LoRa board) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 20 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 21 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 22 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 23 | * see tcc.h is automatically included from: |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 24 | * Arduino15/packages/arduino/tools/CMSIS-Atmel/1.1.0/CMSIS/ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 25 | * Device/ATMEL/samd21/include/component/tcc.h |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 26 | * See also tcc.c (ASF/mbed, e.g. Tcc_get_count_value) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 27 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 28 | static void initTimer(Tcc *t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 29 | static uint32_t getTimerCount(Tcc *t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 30 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 31 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 32 | * The Atmel D21 has three TCC timer, other models have more. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 33 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 34 | const struct TCC_config { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 35 | Tcc *tcc_ptr; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 36 | IRQn_Type tcc_irq; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 37 | uint8_t nbits; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 38 | } TCC_data[] { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 39 | { TCC0, TCC0_IRQn, 24 }, |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 40 | { TCC1, TCC1_IRQn, 24 }, |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 41 | { TCC2, TCC2_IRQn, 16 }, |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 42 | { NULL, (IRQn_Type)NULL, 0 } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 43 | }; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 44 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 45 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 46 | * We preferably use the TCC timers because it supports 24-bit counters |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 47 | * versus TC Timer which supports only 8 or 16 bit counters only. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 48 | * TCC0/1/2 timer work on the D21 using Arduino Zero. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 49 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 50 | #define USE_TCC_TIMEOUT 0 // 0=TCC0, 1=TTC1, 2=TTC2 (see TCC_data) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 51 | #define USE_TCC_TICKER 1 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 52 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 53 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 54 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 55 | * every 21333 ns equals one tick (1/(48000000/1024)) // prescaler 1024, 48 MHz |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 56 | * every 61035 ns equals one tick (1/(32768/2)) // prescaler 2, 32 kHz |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 57 | * COUNT*DIVIDER*SECS until interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 58 | * CPU 48 MHz = (65536*1024)/1.398636s |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 59 | * RTC 32 kHz = (65536*2)/4.0s |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 60 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 61 | #define NS_PER_CLOCK_CPU 21333 // ns secs per clock |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 62 | #define NS_PER_CLOCK_RTC 61035 // ns secs per clock |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 63 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 64 | #define NS_PER_CLOCK NS_PER_CLOCK_RTC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 65 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 66 | /* ----------------- TICKER TIMER CODE ----------------------*/ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 67 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 68 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 69 | * The global ns_counter contains the time in ns from the last time |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 70 | * the counter has been wrapped. It cannot be used directly because the |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 71 | * current counter has to be added fore using it. Use instead |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 72 | * ns_getTicker(), us_ ns_getTicker(), ms_getTicker() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 73 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 74 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 75 | uint64_t ticker_ns; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 76 | static bool initTickerDone = false; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 77 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 78 | uint64_t ns_getTicker(void) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 79 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 80 | Tcc *t = TCC_data[USE_TCC_TICKER].tcc_ptr; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 81 | if (!initTickerDone) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 82 | initTimer(t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 83 | initTickerDone = true; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 84 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 85 | // set counter top to max 16 bit for testing |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 86 | // t->PER.bit.PER = 0xffff; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 87 | // while (t->SYNCBUSY.bit.PER == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 88 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 89 | t->CTRLA.reg |= TCC_CTRLA_ENABLE ; // Enable TC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 90 | while (t->SYNCBUSY.bit.ENABLE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 91 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 92 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 93 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 94 | * if we are called from the interrupt level, the counter contains |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 95 | * somehow wrong data, therfore we needs to read it twice. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 96 | * Another option was to add a little wait (loop 500x) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 97 | * in the TCC_TIMEOUT interrupt handler. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 98 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 99 | if (SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk) // check if we are in the interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 100 | getTimerCount(t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 101 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 102 | uint64_t counter_us = (uint64_t)NS_PER_CLOCK * (uint64_t)getTimerCount(t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 103 | uint64_t ns = ticker_ns + counter_us; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 104 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 105 | return ns; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 106 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 107 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 108 | #if USE_TCC_TICKER == 0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 109 | void TCC0_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 110 | #elif USE_TCC_TICKER == 1 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 111 | void TCC1_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 112 | #elif USE_TCC_TICKER == 2 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 113 | void TCC2_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 114 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 115 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 116 | Tcc *t = TCC_data[USE_TCC_TICKER].tcc_ptr; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 117 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 118 | * Overflow means the timer top exeeded |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 119 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 120 | if (t->INTFLAG.bit.OVF == 1) { // A overflow caused the interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 121 | t->INTFLAG.bit.OVF = 1; // writing a one clears the flag ovf flag |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 122 | // ser->println("T_OVF"); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 123 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 124 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 125 | * reading the count once is needed, otherwise |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 126 | * it will not wrap correct. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 127 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 128 | getTimerCount(t); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 129 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 130 | int bits = TCC_data[USE_TCC_TICKER].nbits; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 131 | int maxCounts = (uint32_t)(1<<bits); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 132 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 133 | ticker_ns += (uint64_t)NS_PER_CLOCK * (uint64_t)maxCounts; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 134 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 135 | if (t->INTFLAG.bit.MC0 == 1) { // A compare to cc0 caused the interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 136 | t->INTFLAG.bit.MC0 = 1; // writing a one clears the MCO (match capture) flag |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 137 | // ser->println("T_MC0"); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 138 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 139 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 140 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 141 | /* ----------------- SUPPORT CODE FOR TCC TIMERS----------------------*/ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 142 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 143 | static bool initTimerDone = false; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 144 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 145 | static void initTimer(Tcc *t) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 146 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 147 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 148 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 149 | * enable clock for TCC, see gclk.h |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 150 | * GCLK_CLKCTRL_GEN_GCLK0 for 48 Mhz CPU |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 151 | * GCLK_CLKCTRL_GEN_GCLK1 for 32k extern crystal XOSC32K (ifdef CRYSTALLESS) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 152 | * GCLK_CLKCTRL_GEN_GCLK1 for 32k internal OSC32K |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 153 | * see Arduino: arduino/hardware/samd/1.6.15/cores/arduino/startup.c |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 154 | * Use TCC_CTRLA_PRESCALER_DIV1024 for for 48 Mhz clock |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 155 | * Use TCC_CTRLA_PRESCALER_DIV2 for 32k clock |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 156 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 157 | if (t == TCC0 || t == TCC1) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 158 | REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK1 | GCLK_CLKCTRL_ID_TCC0_TCC1); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 159 | } else if (t == TCC2) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 160 | REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK1 | GCLK_CLKCTRL_ID_TCC2_TC3_Val); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 161 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 162 | while (GCLK->STATUS.bit.SYNCBUSY == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 163 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 164 | t->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TCC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 165 | while (t->SYNCBUSY.bit.ENABLE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 166 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 167 | t->CTRLA.reg |= (TCC_CTRLA_PRESCALER_DIV2 | TCC_CTRLA_RUNSTDBY); // Set perscaler |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 168 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 169 | t->WAVE.reg |= TCC_WAVE_WAVEGEN_NFRQ; // Set wave form configuration |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 170 | while (t->SYNCBUSY.bit.WAVE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 171 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 172 | t->PER.bit.PER = 0xffffff; // set counter top to max 24 bit |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 173 | while (t->SYNCBUSY.bit.PER == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 174 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 175 | // the compare counter TC->CC[0].reg will be set in the startTimer |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 176 | // after the timeout calculation is known. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 177 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 178 | // Interrupts |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 179 | t->INTENSET.reg = 0; // disable all interrupts |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 180 | t->INTENSET.bit.OVF = 1; // enable overfollow |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 181 | t->INTENSET.bit.MC0 = 1; // enable compare match to CC0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 182 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 183 | const struct TCC_config *cp = &TCC_data[0]; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 184 | while (cp->tcc_ptr) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 185 | if (cp->tcc_ptr == t) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 186 | NVIC_EnableIRQ(cp->tcc_irq); // Enable InterruptVector |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 187 | break; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 188 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 189 | cp++; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 190 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 191 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 192 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 193 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 194 | #if 0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 195 | // Atmel ASF Code |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 196 | static uint32_t getTimerCount(Tcc *t) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 197 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 198 | uint32_t last_cmd; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 199 | /* Wait last command done */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 200 | do { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 201 | while (t->SYNCBUSY.bit.CTRLB); /* Wait for sync */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 202 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 203 | last_cmd = t->CTRLBSET.reg & TCC_CTRLBSET_CMD_Msk; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 204 | if (TCC_CTRLBSET_CMD_NONE == last_cmd) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 205 | /* Issue read command and break */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 206 | t->CTRLBSET.bit.CMD = TCC_CTRLBSET_CMD_READSYNC_Val; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 207 | break; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 208 | } else if (TCC_CTRLBSET_CMD_READSYNC == last_cmd) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 209 | /* Command have been issued */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 210 | break; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 211 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 212 | } while (1); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 213 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 214 | while (t->SYNCBUSY.bit.COUNT); /* Wait for sync */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 215 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 216 | return t->COUNT.reg; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 217 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 218 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 219 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 220 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 221 | static uint32_t getTimerCount(Tcc *t) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 222 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 223 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 224 | noInterrupts(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 225 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 226 | while (t->SYNCBUSY.bit.CTRLB); /* Wait for sync */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 227 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 228 | t->CTRLBSET.bit.CMD = TCC_CTRLBSET_CMD_READSYNC_Val; /* Issue read command and break */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 229 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 230 | while (t->SYNCBUSY.bit.COUNT); /* Wait for sync */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 231 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 232 | uint32_t count = t->COUNT.reg; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 233 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 234 | interrupts(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 235 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 236 | return count; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 237 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 238 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 239 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 240 | Tcc *getTimeout_tcc(void) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 241 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 242 | return TCC_data[USE_TCC_TIMEOUT].tcc_ptr; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 243 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 244 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 245 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 246 | void stopTimer(Tcc *t) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 247 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 248 | t->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 249 | while (t->SYNCBUSY.bit.ENABLE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 250 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 251 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 252 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 253 | /* ----------------- TIMEOUT TIMER CODE ----------------------*/ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 254 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 255 | void startTimer(Tcc *t, uint64_t delay_ns) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 256 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 257 | if (!initTimerDone) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 258 | initTimer(t); // initial setup with stopped timer |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 259 | initTimerDone = true; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 260 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 261 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 262 | stopTimer(t); // avoid timer interrupts while calculating |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 263 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 264 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 265 | * every 21333 ns equals one tick (1/(48000000/1024)) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 266 | * COUNT*DIVIDER*SECS until interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 267 | * 48 Mhz = (65536*1024)/1.398636s |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 268 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 269 | uint64_t nclocks = (uint64_t)delay_ns; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 270 | nclocks /= (uint64_t)NS_PER_CLOCK; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 271 | int nCounts = nclocks; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 272 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 273 | int bits = TCC_data[USE_TCC_TIMEOUT].nbits; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 274 | int maxCounts = (uint32_t)(1<<bits)-1; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 275 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 276 | if (nCounts > maxCounts) // if count exceeds timer capacity |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 277 | nCounts = maxCounts; // set the largest posible count. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 278 | if (nCounts <= 0) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 279 | nCounts = 1; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 280 | t->CC[0].bit.CC = nCounts; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 281 | while (t->SYNCBUSY.bit.CC0 == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 282 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 283 | t->CTRLA.reg |= TCC_CTRLA_ENABLE ; // Enable TC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 284 | while (t->SYNCBUSY.bit.ENABLE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 285 | #if 0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 286 | ser->print(ms_getTicker(), DEC); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 287 | ser->print(" startTimer: nCounts="); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 288 | ser->println(nCounts, DEC); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 289 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 290 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 291 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 292 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 293 | #if USE_TCC_TIMEOUT == 0 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 294 | void TCC0_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 295 | #elif USE_TCC_TIMEOUT == 1 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 296 | void TCC1_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 297 | #elif USE_TCC_TIMEOUT == 2 |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 298 | void TCC2_Handler() |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 299 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 300 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 301 | Tcc *t = TCC_data[USE_TCC_TIMEOUT].tcc_ptr; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 302 | uint64_t nsecs = ns_getTicker(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 303 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 304 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 305 | * Overflow means the max timer exeeded, we need restart the timer |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 306 | * Interrupts and |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 307 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 308 | if (t->INTFLAG.bit.OVF == 1) { // A overflow caused the interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 309 | t->INTFLAG.bit.OVF = 1; // writing a one clears the flag ovf flag |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 310 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 311 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 312 | if (t->INTFLAG.bit.MC0 == 1) { // A compare to cc0 caused the interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 313 | //ser->print("MC0\r\n"); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 314 | t->INTFLAG.bit.MC0 = 1; // writing a one clears the MCO (match capture) flag |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 315 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 316 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 317 | t->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TC |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 318 | while (t->SYNCBUSY.bit.ENABLE == 1); // wait for sync |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 319 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 320 | for (int i = 0; i < MAX_TIMEOUTS-1; i++) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 321 | struct TimeoutVector *tvp = &TimeOuts[i]; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 322 | if (tvp->timer && nsecs >= tvp->timer->_timeout) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 323 | Timeout *saveTimer = tvp->timer; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 324 | tvp->timer = NULL; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 325 | Timeout::_irq_handler(saveTimer); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 326 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 327 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 328 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 329 | * we need to restart the timer for remaining interrupts |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 330 | * Another reason is that we stopped this counter, in case there are |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 331 | * remaining counts, we need to re-schedule the counter. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 332 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 333 | Timeout::restart(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 334 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 335 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 336 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 337 | /* ----------------- D21 sleep() and deepsleep() code ----------------------*/ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 338 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 339 | void sleep(void) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 340 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 341 | /* |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 342 | * If we use the native USB port our Serial is SerialUSB |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 343 | * and if the SerialUSB and connected we should |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 344 | * not enter into sleep mode because this kills the Arduino USB emulation |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 345 | */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 346 | if (ser && ser == (Stream *)&SerialUSB) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 347 | __WFI(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 348 | return; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 349 | // USB->CTRLA.bit.ENABLE = 0; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 350 | // USB->HOST.CTRLA.reg = 0; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 351 | // USB->HOST.CTRLA.bit.ENABLE &= USB_CTRLA_ENABLE; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 352 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 353 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 354 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 355 | #if 1 // (SAMD20 || SAMD21) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 356 | /* Errata: Make sure that the Flash does not power all the way down |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 357 | * when in sleep mode. */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 358 | NVMCTRL->CTRLB.bit.SLEEPPRM = NVMCTRL_CTRLB_SLEEPPRM_DISABLED_Val; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 359 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 360 | uint32_t saved_ms = ms_getTicker(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 361 | SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // disbale SysTick |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 362 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 363 | SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; // clear deep sleep |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 364 | PM->SLEEP.reg = 2; // SYSTEM_SLEEPMODE_IDLE_2 IDLE 2 sleep mode. |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 365 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 366 | __DSB(); // ensures the completion of memory accesses |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 367 | __WFI(); // wait for interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 368 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 369 | int count = ms_getTicker() - saved_ms; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 370 | if (count > 0) { // update the Arduino Systicks |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 371 | for (int i = 0; i < count; i++) { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 372 | SysTick_Handler(); |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 373 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 374 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 375 | SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // enable SysTick |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 376 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 377 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 378 | void deepsleep(void) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 379 | { |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 380 | #if 1 // (SAMD20 || SAMD21) |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 381 | /* Errata: Make sure that the Flash does not power all the way down |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 382 | * when in sleep mode. */ |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 383 | NVMCTRL->CTRLB.bit.SLEEPPRM = NVMCTRL_CTRLB_SLEEPPRM_DISABLED_Val; |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 384 | #endif |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 385 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 386 | SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // disbale SysTick |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 387 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 388 | SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; // standby mode |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 389 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 390 | __DSB(); // ensures the completion of memory accesses |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 391 | __WFI(); // wait for interrupt |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 392 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 393 | SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // enable SysTick |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 394 | } |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 395 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 396 | #endif // D21 TCC Timer, sleep, etc- |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 397 | |
| Helmut Tschemernjak | 77:7f227a4dffe6 | 398 | #endif // ARDUINO |
