+++ /dev/null
-/* Teensyduino Core Library
- * http://www.pjrc.com/teensy/
- * Copyright (c) 2013 PJRC.COM, LLC.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * 1. The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * 2. If the Software is incorporated into a build system that allows
- * selection among a list of target devices, then similar target
- * devices manufactured by PJRC.COM must be included in the list of
- * target devices and selectable in the same manner.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include "mk20dx128.h"
-
-
-extern unsigned long _stext;
-extern unsigned long _etext;
-extern unsigned long _sdata;
-extern unsigned long _edata;
-extern unsigned long _sbss;
-extern unsigned long _ebss;
-extern unsigned long _estack;
-//extern void __init_array_start(void);
-//extern void __init_array_end(void);
-extern int main (void);
-void ResetHandler(void);
-void _init_Teensyduino_internal_(void);
-void __libc_init_array(void);
-
-
-void fault_isr(void)
-{
- while (1) {
- // keep polling some communication while in fault
- // mode, so we don't completely die.
- if (SIM_SCGC4 & SIM_SCGC4_USBOTG) usb_isr();
- if (SIM_SCGC4 & SIM_SCGC4_UART0) uart0_status_isr();
- if (SIM_SCGC4 & SIM_SCGC4_UART1) uart1_status_isr();
- if (SIM_SCGC4 & SIM_SCGC4_UART2) uart2_status_isr();
- }
-}
-
-void unused_isr(void)
-{
- fault_isr();
-}
-
-extern volatile uint32_t systick_millis_count;
-void systick_default_isr(void)
-{
- systick_millis_count++;
-}
-
-void nmi_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void hard_fault_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void memmanage_fault_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void bus_fault_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void usage_fault_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void svcall_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void debugmonitor_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pendablesrvreq_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void systick_isr(void) __attribute__ ((weak, alias("systick_default_isr")));
-
-void dma_ch0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch3_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch4_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch5_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch6_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch7_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch8_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch9_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch10_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch11_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch12_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch13_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch14_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_ch15_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dma_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void mcm_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void flash_cmd_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void flash_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void low_voltage_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void wakeup_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void watchdog_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void i2c0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void i2c1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void i2c2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void spi0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void spi1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void spi2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void sdhc_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_message_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_bus_off_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_tx_warn_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_rx_warn_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void can0_wakeup_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void i2s0_tx_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void i2s0_rx_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart0_lon_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart0_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart0_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart1_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart1_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart2_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart2_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart3_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart3_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart4_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart4_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart5_status_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void uart5_error_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void adc0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void adc1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void cmp0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void cmp1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void cmp2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void ftm0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void ftm1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void ftm2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void ftm3_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void cmt_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void rtc_alarm_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void rtc_seconds_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pit0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pit1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pit2_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pit3_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void pdb_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void usb_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void usb_charge_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dac0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void dac1_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void tsi0_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void mcg_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void lptmr_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void porta_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void portb_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void portc_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void portd_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void porte_isr(void) __attribute__ ((weak, alias("unused_isr")));
-void software_isr(void) __attribute__ ((weak, alias("unused_isr")));
-
-
-// TODO: create AVR-stype ISR() macro, with default linkage to undefined handler
-//
-__attribute__ ((section(".vectors"), used))
-void (* const gVectors[])(void) =
-{
- (void (*)(void))((unsigned long)&_estack), // 0 ARM: Initial Stack Pointer
- ResetHandler, // 1 ARM: Initial Program Counter
- nmi_isr, // 2 ARM: Non-maskable Interrupt (NMI)
- hard_fault_isr, // 3 ARM: Hard Fault
- memmanage_fault_isr, // 4 ARM: MemManage Fault
- bus_fault_isr, // 5 ARM: Bus Fault
- usage_fault_isr, // 6 ARM: Usage Fault
- fault_isr, // 7 --
- fault_isr, // 8 --
- fault_isr, // 9 --
- fault_isr, // 10 --
- svcall_isr, // 11 ARM: Supervisor call (SVCall)
- debugmonitor_isr, // 12 ARM: Debug Monitor
- fault_isr, // 13 --
- pendablesrvreq_isr, // 14 ARM: Pendable req serv(PendableSrvReq)
- systick_isr, // 15 ARM: System tick timer (SysTick)
-#if defined(__MK20DX128__)
- dma_ch0_isr, // 16 DMA channel 0 transfer complete
- dma_ch1_isr, // 17 DMA channel 1 transfer complete
- dma_ch2_isr, // 18 DMA channel 2 transfer complete
- dma_ch3_isr, // 19 DMA channel 3 transfer complete
- dma_error_isr, // 20 DMA error interrupt channel
- unused_isr, // 21 DMA --
- flash_cmd_isr, // 22 Flash Memory Command complete
- flash_error_isr, // 23 Flash Read collision
- low_voltage_isr, // 24 Low-voltage detect/warning
- wakeup_isr, // 25 Low Leakage Wakeup
- watchdog_isr, // 26 Both EWM and WDOG interrupt
- i2c0_isr, // 27 I2C0
- spi0_isr, // 28 SPI0
- i2s0_tx_isr, // 29 I2S0 Transmit
- i2s0_rx_isr, // 30 I2S0 Receive
- uart0_lon_isr, // 31 UART0 CEA709.1-B (LON) status
- uart0_status_isr, // 32 UART0 status
- uart0_error_isr, // 33 UART0 error
- uart1_status_isr, // 34 UART1 status
- uart1_error_isr, // 35 UART1 error
- uart2_status_isr, // 36 UART2 status
- uart2_error_isr, // 37 UART2 error
- adc0_isr, // 38 ADC0
- cmp0_isr, // 39 CMP0
- cmp1_isr, // 40 CMP1
- ftm0_isr, // 41 FTM0
- ftm1_isr, // 42 FTM1
- cmt_isr, // 43 CMT
- rtc_alarm_isr, // 44 RTC Alarm interrupt
- rtc_seconds_isr, // 45 RTC Seconds interrupt
- pit0_isr, // 46 PIT Channel 0
- pit1_isr, // 47 PIT Channel 1
- pit2_isr, // 48 PIT Channel 2
- pit3_isr, // 49 PIT Channel 3
- pdb_isr, // 50 PDB Programmable Delay Block
- usb_isr, // 51 USB OTG
- usb_charge_isr, // 52 USB Charger Detect
- tsi0_isr, // 53 TSI0
- mcg_isr, // 54 MCG
- lptmr_isr, // 55 Low Power Timer
- porta_isr, // 56 Pin detect (Port A)
- portb_isr, // 57 Pin detect (Port B)
- portc_isr, // 58 Pin detect (Port C)
- portd_isr, // 59 Pin detect (Port D)
- porte_isr, // 60 Pin detect (Port E)
- software_isr, // 61 Software interrupt
-#elif defined(__MK20DX256__)
- dma_ch0_isr, // 16 DMA channel 0 transfer complete
- dma_ch1_isr, // 17 DMA channel 1 transfer complete
- dma_ch2_isr, // 18 DMA channel 2 transfer complete
- dma_ch3_isr, // 19 DMA channel 3 transfer complete
- dma_ch4_isr, // 20 DMA channel 4 transfer complete
- dma_ch5_isr, // 21 DMA channel 5 transfer complete
- dma_ch6_isr, // 22 DMA channel 6 transfer complete
- dma_ch7_isr, // 23 DMA channel 7 transfer complete
- dma_ch8_isr, // 24 DMA channel 8 transfer complete
- dma_ch9_isr, // 25 DMA channel 9 transfer complete
- dma_ch10_isr, // 26 DMA channel 10 transfer complete
- dma_ch11_isr, // 27 DMA channel 10 transfer complete
- dma_ch12_isr, // 28 DMA channel 10 transfer complete
- dma_ch13_isr, // 29 DMA channel 10 transfer complete
- dma_ch14_isr, // 30 DMA channel 10 transfer complete
- dma_ch15_isr, // 31 DMA channel 10 transfer complete
- dma_error_isr, // 32 DMA error interrupt channel
- unused_isr, // 33 --
- flash_cmd_isr, // 34 Flash Memory Command complete
- flash_error_isr, // 35 Flash Read collision
- low_voltage_isr, // 36 Low-voltage detect/warning
- wakeup_isr, // 37 Low Leakage Wakeup
- watchdog_isr, // 38 Both EWM and WDOG interrupt
- unused_isr, // 39 --
- i2c0_isr, // 40 I2C0
- i2c1_isr, // 41 I2C1
- spi0_isr, // 42 SPI0
- spi1_isr, // 43 SPI1
- unused_isr, // 44 --
- can0_message_isr, // 45 CAN OR'ed Message buffer (0-15)
- can0_bus_off_isr, // 46 CAN Bus Off
- can0_error_isr, // 47 CAN Error
- can0_tx_warn_isr, // 48 CAN Transmit Warning
- can0_rx_warn_isr, // 49 CAN Receive Warning
- can0_wakeup_isr, // 50 CAN Wake Up
- i2s0_tx_isr, // 51 I2S0 Transmit
- i2s0_rx_isr, // 52 I2S0 Receive
- unused_isr, // 53 --
- unused_isr, // 54 --
- unused_isr, // 55 --
- unused_isr, // 56 --
- unused_isr, // 57 --
- unused_isr, // 58 --
- unused_isr, // 59 --
- uart0_lon_isr, // 60 UART0 CEA709.1-B (LON) status
- uart0_status_isr, // 61 UART0 status
- uart0_error_isr, // 62 UART0 error
- uart1_status_isr, // 63 UART1 status
- uart1_error_isr, // 64 UART1 error
- uart2_status_isr, // 65 UART2 status
- uart2_error_isr, // 66 UART2 error
- unused_isr, // 67 --
- unused_isr, // 68 --
- unused_isr, // 69 --
- unused_isr, // 70 --
- unused_isr, // 71 --
- unused_isr, // 72 --
- adc0_isr, // 73 ADC0
- adc1_isr, // 74 ADC1
- cmp0_isr, // 75 CMP0
- cmp1_isr, // 76 CMP1
- cmp2_isr, // 77 CMP2
- ftm0_isr, // 78 FTM0
- ftm1_isr, // 79 FTM1
- ftm2_isr, // 80 FTM2
- cmt_isr, // 81 CMT
- rtc_alarm_isr, // 82 RTC Alarm interrupt
- rtc_seconds_isr, // 83 RTC Seconds interrupt
- pit0_isr, // 84 PIT Channel 0
- pit1_isr, // 85 PIT Channel 1
- pit2_isr, // 86 PIT Channel 2
- pit3_isr, // 87 PIT Channel 3
- pdb_isr, // 88 PDB Programmable Delay Block
- usb_isr, // 89 USB OTG
- usb_charge_isr, // 90 USB Charger Detect
- unused_isr, // 91 --
- unused_isr, // 92 --
- unused_isr, // 93 --
- unused_isr, // 94 --
- unused_isr, // 95 --
- unused_isr, // 96 --
- dac0_isr, // 97 DAC0
- unused_isr, // 98 --
- tsi0_isr, // 99 TSI0
- mcg_isr, // 100 MCG
- lptmr_isr, // 101 Low Power Timer
- unused_isr, // 102 --
- porta_isr, // 103 Pin detect (Port A)
- portb_isr, // 104 Pin detect (Port B)
- portc_isr, // 105 Pin detect (Port C)
- portd_isr, // 106 Pin detect (Port D)
- porte_isr, // 107 Pin detect (Port E)
- unused_isr, // 108 --
- unused_isr, // 109 --
- software_isr, // 110 Software interrupt
-#endif
-};
-
-//void usb_isr(void)
-//{
-//}
-
-__attribute__ ((section(".flashconfig"), used))
-const uint8_t flashconfigbytes[16] = {
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF
-};
-
-
-// Automatically initialize the RTC. When the build defines the compile
-// time, and the user has added a crystal, the RTC will automatically
-// begin at the time of the first upload.
-#ifndef TIME_T
-#define TIME_T 1349049600 // default 1 Oct 2012 (never used, Arduino sets this)
-#endif
-extern void rtc_set(unsigned long t);
-
-
-static void startup_default_early_hook(void) { WDOG_STCTRLH = WDOG_STCTRLH_ALLOWUPDATE; }
-static void startup_default_late_hook(void) {}
-void startup_early_hook(void) __attribute__ ((weak, alias("startup_default_early_hook")));
-void startup_late_hook(void) __attribute__ ((weak, alias("startup_default_late_hook")));
-
-__attribute__ ((section(".startup")))
-void ResetHandler(void)
-{
- uint32_t *src = &_etext;
- uint32_t *dest = &_sdata;
- unsigned int i;
-
- WDOG_UNLOCK = WDOG_UNLOCK_SEQ1;
- WDOG_UNLOCK = WDOG_UNLOCK_SEQ2;
- asm volatile ("nop");
- asm volatile ("nop");
- // programs using the watchdog timer or needing to initialize hardware as
- // early as possible can implement startup_early_hook()
- startup_early_hook();
-
- // enable clocks to always-used peripherals
-#if defined(__MK20DX128__)
- SIM_SCGC5 = 0x00043F82; // clocks active to all GPIO
- SIM_SCGC6 = SIM_SCGC6_RTC | SIM_SCGC6_FTM0 | SIM_SCGC6_FTM1 | SIM_SCGC6_ADC0 | SIM_SCGC6_FTFL;
-#elif defined(__MK20DX256__)
- SIM_SCGC3 = SIM_SCGC3_ADC1 | SIM_SCGC3_FTM2;
- SIM_SCGC5 = 0x00043F82; // clocks active to all GPIO
- SIM_SCGC6 = SIM_SCGC6_RTC | SIM_SCGC6_FTM0 | SIM_SCGC6_FTM1 | SIM_SCGC6_ADC0 | SIM_SCGC6_FTFL;
-#endif
-
- // if the RTC oscillator isn't enabled, get it started early
- if (!(RTC_CR & RTC_CR_OSCE)) {
- RTC_SR = 0;
- RTC_CR = RTC_CR_SC16P | RTC_CR_SC4P | RTC_CR_OSCE;
- }
-
- // release I/O pins hold, if we woke up from VLLS mode
- if (PMC_REGSC & PMC_REGSC_ACKISO) PMC_REGSC |= PMC_REGSC_ACKISO;
-
- // TODO: do this while the PLL is waiting to lock....
- while (dest < &_edata) *dest++ = *src++;
- dest = &_sbss;
- while (dest < &_ebss) *dest++ = 0;
- SCB_VTOR = 0; // use vector table in flash
-
- // default all interrupts to medium priority level
- for (i=0; i < NVIC_NUM_INTERRUPTS; i++) NVIC_SET_PRIORITY(i, 128);
-
- // start in FEI mode
- // enable capacitors for crystal
- OSC0_CR = OSC_SC8P | OSC_SC2P;
- // enable osc, 8-32 MHz range, low power mode
- MCG_C2 = MCG_C2_RANGE0(2) | MCG_C2_EREFS;
- // switch to crystal as clock source, FLL input = 16 MHz / 512
- MCG_C1 = MCG_C1_CLKS(2) | MCG_C1_FRDIV(4);
- // wait for crystal oscillator to begin
- while ((MCG_S & MCG_S_OSCINIT0) == 0) ;
- // wait for FLL to use oscillator
- while ((MCG_S & MCG_S_IREFST) != 0) ;
- // wait for MCGOUT to use oscillator
- while ((MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST(2)) ;
- // now we're in FBE mode
- // config PLL input for 16 MHz Crystal / 4 = 4 MHz
- MCG_C5 = MCG_C5_PRDIV0(3);
- // config PLL for 96 MHz output
- MCG_C6 = MCG_C6_PLLS | MCG_C6_VDIV0(0);
- // wait for PLL to start using xtal as its input
- while (!(MCG_S & MCG_S_PLLST)) ;
- // wait for PLL to lock
- while (!(MCG_S & MCG_S_LOCK0)) ;
- // now we're in PBE mode
-#if F_CPU == 96000000
- // config divisors: 96 MHz core, 48 MHz bus, 24 MHz flash
- SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(0) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV4(3);
-#elif F_CPU == 48000000
- // config divisors: 48 MHz core, 48 MHz bus, 24 MHz flash
- SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV4(3);
-#elif F_CPU == 24000000
- // config divisors: 24 MHz core, 24 MHz bus, 24 MHz flash
- SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(3) | SIM_CLKDIV1_OUTDIV2(3) | SIM_CLKDIV1_OUTDIV4(3);
-#else
-#error "Error, F_CPU must be 96000000, 48000000, or 24000000"
-#endif
- // switch to PLL as clock source, FLL input = 16 MHz / 512
- MCG_C1 = MCG_C1_CLKS(0) | MCG_C1_FRDIV(4);
- // wait for PLL clock to be used
- while ((MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST(3)) ;
- // now we're in PEE mode
- // configure USB for 48 MHz clock
- SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV(1); // USB = 96 MHz PLL / 2
- // USB uses PLL clock, trace is CPU clock, CLKOUT=OSCERCLK0
- SIM_SOPT2 = SIM_SOPT2_USBSRC | SIM_SOPT2_PLLFLLSEL | SIM_SOPT2_TRACECLKSEL | SIM_SOPT2_CLKOUTSEL(6);
-
- // initialize the SysTick counter
- SYST_RVR = (F_CPU / 1000) - 1;
- SYST_CSR = SYST_CSR_CLKSOURCE | SYST_CSR_TICKINT | SYST_CSR_ENABLE;
-
- //init_pins();
- __enable_irq();
-
- _init_Teensyduino_internal_();
- if (RTC_SR & RTC_SR_TIF) rtc_set(TIME_T);
-
- __libc_init_array();
-
-/*
- for (ptr = &__init_array_start; ptr < &__init_array_end; ptr++) {
- (*ptr)();
- }
-*/
- startup_late_hook();
- main();
- while (1) ;
-}
-
-// TODO: is this needed for c++ and where does it come from?
-/*
-void _init(void)
-{
-}
-*/
-
-char *__brkval = (char *)&_ebss;
-
-void * _sbrk(int incr)
-{
- //static char *heap_end = (char *)&_ebss;
- //char *prev = heap_end;
- //heap_end += incr;
-
- char *prev = __brkval;
- __brkval += incr;
- return prev;
-}
-
-__attribute__((weak))
-int _read(int file, char *ptr, int len)
-{
- return 0;
-}
-
-/* moved to Print.cpp, to support Print::printf()
-__attribute__((weak))
-int _write(int file, char *ptr, int len)
-{
- return 0;
-}
-*/
-
-__attribute__((weak))
-int _close(int fd)
-{
- return -1;
-}
-
-#include <sys/stat.h>
-
-__attribute__((weak))
-int _fstat(int fd, struct stat *st)
-{
- st->st_mode = S_IFCHR;
- return 0;
-}
-
-__attribute__((weak))
-int _isatty(int fd)
-{
- return 1;
-}
-
-__attribute__((weak))
-int _lseek(int fd, long long offset, int whence)
-{
- return -1;
-}
-
-__attribute__((weak))
-void _exit(int status)
-{
- while (1);
-}
-
-__attribute__((weak))
-void __cxa_pure_virtual()
-{
- while (1);
-}
-
-__attribute__((weak))
-int __cxa_guard_acquire (char *g)
-{
- return !(*g);
-}
-
-__attribute__((weak))
-void __cxa_guard_release(char *g)
-{
- *g = 1;
-}
-
-int nvic_execution_priority(void)
-{
- int priority=256;
- uint32_t primask, faultmask, basepri, ipsr;
-
- // full algorithm in ARM DDI0403D, page B1-639
- // this isn't quite complete, but hopefully good enough
- asm volatile("mrs %0, faultmask\n" : "=r" (faultmask)::);
- if (faultmask) return -1;
- asm volatile("mrs %0, primask\n" : "=r" (primask)::);
- if (primask) return 0;
- asm volatile("mrs %0, ipsr\n" : "=r" (ipsr)::);
- if (ipsr) {
- if (ipsr < 16) priority = 0; // could be non-zero
- else priority = NVIC_GET_PRIORITY(ipsr - 16);
- }
- asm volatile("mrs %0, basepri\n" : "=r" (basepri)::);
- if (basepri > 0 && basepri < priority) priority = basepri;
- return priority;
-}
-
notaz.gp2x.de / megadrive.git / blobdiff