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Fixes #2790: power on/off lop if big VCC capcitor was used

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This commit is contained in:
Damjan Adamic
2015-08-28 18:07:24 +02:00
parent 7befb457f2
commit e4f7fd910c
2 changed files with 40 additions and 25 deletions
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radio/src/loadboot.cpp
+24 -5
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@@ -100,13 +100,19 @@ void _bootStart()
__ASM volatile ("nop");
__ASM volatile ("nop");
// Turn soft power ON now
GPIOD->BSRRL = 1; // set PWR_GPIO_PIN_ON pin to 1
GPIOD->MODER = (GPIOD->MODER & 0xFFFFFFFC) | 1; // General purpose output mode
// Turn soft power ON now, but only if we got started because of the watchdog
// or software reset. If the radio was started by user pressing the power button
// then that button is providing power and we don't need to enable it here.
//
// If we were to turn it on here indiscriminately, then the radio can go into the
// power on/off loop after being powered off by the user. (issue #2790)
if (WAS_RESET_BY_WATCHDOG_OR_SOFTWARE()) {
GPIOD->BSRRL = 1; // set PWR_GPIO_PIN_ON pin to 1
GPIOD->MODER = (GPIOD->MODER & 0xFFFFFFFC) | 1; // General purpose output mode
}
// TRIMS_GPIO_PIN_LHR is on PG0 on 9XE and on PE3 on Taranis
// TRIMS_GPIO_PIN_RHL is on PC1 on all versions
// turn on pull-ups on trim keys
GPIOC->PUPDR = 0x00000004;
#if defined(REV9E)
@@ -114,11 +120,24 @@ void _bootStart()
#else
GPIOE->PUPDR = 0x00000040;
#endif
// wait for inputs to stabilize
for (uint32_t i = 0; i < 50000; i += 1) {
bwdt_reset();
}
// now the second part of power on sequence
// If we got here and the radio was not started by the watchdog/software reset,
// then we must have a power button pressed. If not then we are in power on/off loop
// and to terminate it, just wait here without turning on PWR pin. The power supply will
// eventually exhaust and the radio will turn off.
if (!WAS_RESET_BY_WATCHDOG_OR_SOFTWARE()) {
// wait here until the power key is pressed
while (GPIOD->IDR & PWR_GPIO_PIN_SWITCH) {
bwdt_reset();
}
}
if (!(TRIMS_GPIO_REG_LHR & TRIMS_GPIO_PIN_LHR) && !(TRIMS_GPIO_REG_RHL & TRIMS_GPIO_PIN_RHL)) {
// Bootloader needed
const uint8_t *src;