arduino/optiboot
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Day of testing and minor edits.

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The RTC might be busy at startup.
This seems to be working - code successfully uploaded, after I got all the fuses right.
This commit is contained in:
WestfW
2019-09-03 02:57:51 -07:00
parent 1d763359a7
commit bb9ae67aee
1 changed files with 20 additions and 12 deletions
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30
optiboot/bootloaders/optiboot/optiboot_x.c
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@ -134,6 +134,17 @@ optiboot_version = 256*(OPTIBOOT_MAJVER + OPTIBOOT_CUSTOMVER) + OPTIBOOT_MINVER;
#include <inttypes.h>
#include <avr/io.h>
FUSES = {
// .WDTCFG, /* Watchdog Configuration */
// .BODCFG, /* BOD Configuration */
.OSCCFG = 2, /* Oscillator Configuration */
// .TCD0CFG, /* TCD0 Configuration */
.SYSCFG0 = 0xC8, /* RESET is active */
.SYSCFG1 = 0x06, /* startup 32ms */
// .APPEND = 0, /* Application Code Section End */
.BOOTEND = 2 /* Boot Section End */
};
/*
* optiboot uses several "address" variables that are sometimes byte pointers,
* sometimes word pointers. sometimes 16bit quantities, and sometimes built
@ -230,7 +241,8 @@ static void getNch(uint8_t);
#if LED_START_FLASHES > 0
static inline void flash_led(uint8_t);
#endif
static inline void watchdogReset();
#define watchdogReset() __asm__ __volatile__ ("wdr\n")
/*
* RAMSTART should be self-explanatory. It's bigger on parts with a
@ -287,6 +299,7 @@ int main(void) {
* and still skip bootloader if not necessary
*/
ch = RSTCTRL.RSTFR;
RSTCTRL.RSTFR = ch; // reset causes, for now.
// Skip all logic and run bootloader if cause is cleared (application request)
if (ch != 0) {
@ -329,6 +342,8 @@ int main(void) {
#if LED_START_FLASHES > 0
// Set up RTC counting at about 1/8s (input is 32kHz)
while (RTC.STATUS & RTC_CTRLABUSY_bm)
; // RTC is used by startup logic (!) and might be busy.
RTC.CTRLA= RTC_PRESCALER_DIV4096_gc | RTC_RTCEN_bm;
RTC.DBGCTRL = 1; // enable during debug
#endif
@ -428,9 +443,9 @@ int main(void) {
address.word += MAPPED_EEPROM_START;
}
do
*address.bptr++ = getch();
while (--length);
do {
*(address.bptr++) = getch();
} while (--length);
// Read command terminator, start reply
verifySpace();
@ -530,13 +545,6 @@ void flash_led(uint8_t count) {
}
#endif
// Watchdog functions. These are only safe with interrupts turned off.
void watchdogReset() {
__asm__ __volatile__ (
"wdr\n"
);
}
void watchdogConfig(uint8_t x) {
_PROTECTED_WRITE(WDT.CTRLA, x);
}