87 lines
3.3 KiB
C++
87 lines
3.3 KiB
C++
/*
|
|
Copyright (c) 2014-2015 Arduino LLC. All right reserved.
|
|
Copyright (c) 2016 Sandeep Mistry All right reserved.
|
|
Copyright (c) 2018, Adafruit Industries (adafruit.com)
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "variant.h"
|
|
#include "nrf.h"
|
|
#include "wiring_constants.h"
|
|
#include "wiring_digital.h"
|
|
#include "SEGGER_RTT.h"
|
|
|
|
extern "C" {
|
|
#include "nrf_soc.h"
|
|
}
|
|
|
|
static bool pofcon_disabled = false;
|
|
|
|
const uint32_t g_ADigitalPinMap[] = {
|
|
// P0
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
|
|
|
|
// P1
|
|
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47};
|
|
|
|
void initVariant()
|
|
{
|
|
// Configure P0.18 as RESET pin (UICR->PSELRESET).
|
|
// nrf52_recover (ERASEALL) clears UICR to 0xFFFFFFFF, disabling reset.
|
|
// SystemInit() should do this via CONFIG_GPIO_AS_PINRESET, but that code path
|
|
// is not compiled in by the Adafruit core. Write UICR directly here - this
|
|
// runs before SoftDevice is enabled, so NVMC is accessible.
|
|
if ((NRF_UICR->PSELRESET[0] != 18) || (NRF_UICR->PSELRESET[1] != 18)) {
|
|
NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
|
|
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
|
|
NRF_UICR->PSELRESET[0] = 18;
|
|
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
|
|
NRF_UICR->PSELRESET[1] = 18;
|
|
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
|
|
NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
|
|
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
|
|
NVIC_SystemReset(); // Reboot to apply PSELRESET (hardware reconfigures P0.18)
|
|
}
|
|
}
|
|
|
|
void variant_shutdown()
|
|
{
|
|
nrf_gpio_cfg_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP); // Enable internal pull-up on the button pin
|
|
nrf_gpio_pin_sense_t sense = NRF_GPIO_PIN_SENSE_LOW; // Configure SENSE signal on low edge
|
|
nrf_gpio_cfg_sense_set(BUTTON_PIN, sense); // Apply SENSE to wake up the device from the deep sleep
|
|
}
|
|
|
|
void variant_nrf52LoopHook(void)
|
|
{
|
|
// Debug: toggle P0.11 to confirm this hook is called
|
|
static bool initialized = false;
|
|
if (!initialized) {
|
|
nrf_gpio_cfg_output(11);
|
|
initialized = true;
|
|
}
|
|
nrf_gpio_pin_toggle(11);
|
|
|
|
// Disable POFCON via SoftDevice API - direct NRF_POWER->POFCON writes are
|
|
// ignored once SoftDevice is enabled. E22-400M33S TX causes transient VDD
|
|
// drops that trigger POFWARN -> lfs_assert -> NVIC_SystemReset.
|
|
static uint32_t retry_count = 0;
|
|
if (retry_count < 3) {
|
|
uint32_t ret = sd_power_pof_enable(0);
|
|
SEGGER_RTT_printf(0, "variant_loop: ret=%d POFCON=0x%x\r\n", ret, NRF_POWER->POFCON);
|
|
retry_count++;
|
|
}
|
|
}
|