// ----- Includes -----
+// Debug Includes
+#if defined(_bootloader_)
+#include <inttypes.h>
+#include <debug.h>
+#else
+#include <print.h>
+#endif
+
// Local Includes
#include "mk20dx.h"
// NVIC - Default ISR
void fault_isr()
{
+ print("Fault!" NL );
while ( 1 )
{
// keep polling some communication while in fault
}
+// NVIC - Non-Maskable Interrupt ISR
+void nmi_default_isr()
+{
+ print("NMI!" NL );
+}
+
+
+// NVIC - Hard Fault ISR
+void hard_fault_default_isr()
+{
+ print("Hard Fault! SCB_HFSR: ");
+ printHex32( SCB_HFSR );
+ print( NL );
+ SOFTWARE_RESET();
+}
+
+
+// NVIC - Memory Manager Fault ISR
+void memmanage_fault_default_isr()
+{
+ print("Memory Manager Fault! SCB_CFSR: ");
+ printHex32( SCB_CFSR );
+ print(" SCB_MMAR: ");
+ printHex32( SCB_MMAR );
+ print( NL );
+}
+
+
+// NVIC - Bus Fault ISR
+void bus_fault_default_isr()
+{
+ print("Bus Fault! SCB_CFSR: ");
+ printHex32( SCB_CFSR );
+ print(" SCB_BFAR: ");
+ printHex32( SCB_BFAR );
+ print( NL );
+}
+
+
+// NVIC - Usage Fault ISR
+void usage_fault_default_isr()
+{
+ print("Usage Fault! SCB_CFSR: ");
+ printHex32( SCB_CFSR );
+ print( NL );
+}
+
+
// NVIC - Default ISR/Vector Linking
-void nmi_isr() __attribute__ ((weak, alias("unused_isr")));
-void hard_fault_isr() __attribute__ ((weak, alias("unused_isr")));
-void memmanage_fault_isr() __attribute__ ((weak, alias("unused_isr")));
-void bus_fault_isr() __attribute__ ((weak, alias("unused_isr")));
-void usage_fault_isr() __attribute__ ((weak, alias("unused_isr")));
+void nmi_isr() __attribute__ ((weak, alias("nmi_default_isr")));
+void hard_fault_isr() __attribute__ ((weak, alias("hard_fault_default_isr")));
+void memmanage_fault_isr() __attribute__ ((weak, alias("memmanage_fault_default_isr")));
+void bus_fault_isr() __attribute__ ((weak, alias("bus_fault_default_isr")));
+void usage_fault_isr() __attribute__ ((weak, alias("usage_fault_default_isr")));
void svcall_isr() __attribute__ ((weak, alias("unused_isr")));
void debugmonitor_isr() __attribute__ ((weak, alias("unused_isr")));
void pendablesrvreq_isr() __attribute__ ((weak, alias("unused_isr")));
0x03, // Flash nonvolatile option byte FOPT
0xFF, // EEPROM Protection Byte FEPROT
0xFF, // Data Flash Protection Byte FDPROT
+};
#endif
__attribute__((noreturn))
static inline void jump_to_app( uintptr_t addr )
{
- // addr is in r0
- __asm__("ldr sp, [%[addr], #0]\n"
- "ldr pc, [%[addr], #4]"
- :: [addr] "r" (addr));
- // NOTREACHED
- __builtin_unreachable();
+ // addr is in r0
+ __asm__("ldr sp, [%[addr], #0]\n"
+ "ldr pc, [%[addr], #4]"
+ :: [addr] "r" (addr));
+ // NOTREACHED
+ __builtin_unreachable();
}
#endif
//
// Also checking for ARM lock-up signal (invalid firmware image)
// RCM_SRS1 & 0x02
- if ( RCM_SRS0 & 0x40 || RCM_SRS0 & 0x20 || RCM_SRS1 & 0x02 || _app_rom == 0xffffffff ||
- memcmp( (uint8_t*)&VBAT, sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic) ) == 0 ) // Check for soft reload
+ if ( // PIN (External Reset Pin/Switch)
+ RCM_SRS0 & 0x40
+ // WDOG (Watchdog timeout)
+ || RCM_SRS0 & 0x20
+ // LOCKUP (ARM Core LOCKUP event)
+ || RCM_SRS1 & 0x02
+ // Blank flash check
+ || _app_rom == 0xffffffff
+ // Software reset
+ || memcmp( (uint8_t*)&VBAT, sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic) ) == 0
+ )
{
memset( (uint8_t*)&VBAT, 0, sizeof(VBAT) );
}
SIM_SCGC6 = SIM_SCGC6_FTM0 | SIM_SCGC6_FTM1 | SIM_SCGC6_ADC0 | SIM_SCGC6_FTFL;
#if defined(_mk20dx128_)
SIM_SCGC6 |= SIM_SCGC6_RTC;
-#elif defined(_mk20dx256_)
+#elif defined(_mk20dx256_) || defined(_mk20dx256vlh7_)
SIM_SCGC3 = SIM_SCGC3_ADC1 | SIM_SCGC3_FTM2;
SIM_SCGC6 |= SIM_SCGC6_RTC;
#endif
NVIC_SET_PRIORITY( i, 128 );
}
- // FLL at 48MHz
+ // FLL at 48MHz
MCG_C4 = MCG_C4_DMX32 | MCG_C4_DRST_DRS( 1 );
// USB Clock and FLL select
// Teensy 3.0 and 3.1 and Kiibohd-dfu (mk20dx256vlh7)
#else
- SCB_VTOR = 0; // use vector table in flash
+#if defined(_mk20dx128_) || defined(_mk20dx256_)
+ // use vector table in flash
+ SCB_VTOR = 0;
+#endif
// default all interrupts to medium priority level
for ( unsigned int i = 0; i < NVIC_NUM_INTERRUPTS; i++ )
while ( (MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST( 2 ) );
// now we're in FBE mode
+#if F_CPU == 72000000
+ // config PLL input for 16 MHz Crystal / 8 = 2 MHz
+ MCG_C5 = MCG_C5_PRDIV0( 7 );
+#else
// config PLL input for 16 MHz Crystal / 4 = 4 MHz
MCG_C5 = MCG_C5_PRDIV0( 3 );
+#endif
+#if F_CPU == 72000000
+ // config PLL for 72 MHz output (36 * 2 MHz Ext PLL)
+ MCG_C6 = MCG_C6_PLLS | MCG_C6_VDIV0( 12 );
+#else
// config PLL for 96 MHz output
MCG_C6 = MCG_C6_PLLS | MCG_C6_VDIV0( 0 );
+#endif
// wait for PLL to start using xtal as its input
while ( !(MCG_S & MCG_S_PLLST) );
#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 == 72000000
+ // config divisors: 72 MHz core, 36 MHz bus, 24 MHz flash
+ SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1( 0 ) | SIM_CLKDIV1_OUTDIV2( 1 ) | SIM_CLKDIV1_OUTDIV4( 2 );
#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 );
// 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"
+#error "Error, F_CPU must be 96000000, 72000000, 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 );
while ( (MCG_S & MCG_S_CLKST_MASK) != MCG_S_CLKST( 3 ) );
// now we're in PEE mode
+#if F_CPU == 72000000
+ // configure USB for 48 MHz clock
+ SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV( 2 ) | SIM_CLKDIV2_USBFRAC; // USB = 72 MHz PLL / 1.5
+#else
// configure USB for 48 MHz clock
SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV( 1 ); // USB = 96 MHz PLL / 2
+#endif
// 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 );