static void nordicsemi_nrf52840_init(void)
{
/* Workaround for Errata 36 "CLOCK: Some registers are not reset when
* expected" found at the Errata document for your device located at
* https://infocenter.nordicsemi.com/
*/
if (errata_36()) {
NRF_CLOCK->EVENTS_DONE = 0;
NRF_CLOCK->EVENTS_CTTO = 0;
NRF_CLOCK->CTIV = 0;
}
/* Workaround for Errata 98 "NFCT: Not able to communicate with the
* peer" found at the Errata document for your device located at
* https://infocenter.nordicsemi.com/
*/
if (errata_98()) {
*(volatile u32_t *)0x4000568Cul = 0x00038148ul;
}
/* Workaround for Errata 103 "CCM: Wrong reset value of CCM
* MAXPACKETSIZE" found at the Errata document for your device
* located at https://infocenter.nordicsemi.com/
*/
if (errata_103()) {
NRF_CCM->MAXPACKETSIZE = 0xFBul;
}
/* Workaround for Errata 115 "RAM: RAM content cannot be trusted upon
* waking up from System ON Idle or System OFF mode" found at the
* Errata document for your device located at
* https://infocenter.nordicsemi.com/
*/
if (errata_115()) {
*(volatile u32_t *)0x40000EE4 =
(*(volatile u32_t *) 0x40000EE4 & 0xFFFFFFF0) |
(*(u32_t *)0x10000258 & 0x0000000F);
}
/* Workaround for Errata 120 "QSPI: Data read or written is corrupted"
* found at the Errata document for your device located at
* https://infocenter.nordicsemi.com/
*/
if (errata_120()) {
*(volatile u32_t *)0x40029640ul = 0x200ul;
}
/* Workaround for Errata 136 "System: Bits in RESETREAS are set when
* they should not be" found at the Errata document for your device
* located at https://infocenter.nordicsemi.com/
*/
if (errata_136_nrf52840()) {
if (NRF_POWER->RESETREAS & POWER_RESETREAS_RESETPIN_Msk) {
NRF_POWER->RESETREAS = ~POWER_RESETREAS_RESETPIN_Msk;
}
}
/* Configure GPIO pads as pPin Reset pin if Pin Reset capabilities
* desired.
* If CONFIG_GPIO_AS_PINRESET is not defined, pin reset will not be
* available. One GPIO (see Product Specification to see which one) will
* then be reserved for PinReset and not available as normal GPIO.
*/
#if defined(CONFIG_GPIO_AS_PINRESET)
if (((NRF_UICR->PSELRESET[0] & UICR_PSELRESET_CONNECT_Msk) !=
(UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos)) ||
((NRF_UICR->PSELRESET[1] & UICR_PSELRESET_CONNECT_Msk) !=
(UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos))) {
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();
}
#endif
/* Enable SWO trace functionality. If ENABLE_SWO is not defined, SWO pin
* will be used as GPIO (see Product Specification to see which one).
*/
#if defined(ENABLE_SWO)
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Serial <<
CLOCK_TRACECONFIG_TRACEMUX_Pos;
NRF_P1->PIN_CNF[0] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos)
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
#endif
/* Enable Trace functionality. If ENABLE_TRACE is not defined, TRACE
* pins will be used as GPIOs (see Product Specification to see which
* ones).
*/
#if defined(ENABLE_TRACE)
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Parallel <<
CLOCK_TRACECONFIG_TRACEMUX_Pos;
NRF_P0->PIN_CNF[7] = (GPIO_PIN_CNF_DRIVE_H0H1 <<
GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect <<
GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P1->PIN_CNF[0] = (GPIO_PIN_CNF_DRIVE_H0H1 <<
GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect <<
GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P0->PIN_CNF[12] = (GPIO_PIN_CNF_DRIVE_H0H1 <<
GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect <<
GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P0->PIN_CNF[11] = (GPIO_PIN_CNF_DRIVE_H0H1 <<
GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect <<
GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P1->PIN_CNF[9] = (GPIO_PIN_CNF_DRIVE_H0H1 <<
GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect <<
GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
#endif
}
void SystemInit(void)
{
/* Enable SWO trace functionality. If ENABLE_SWO is not defined, SWO pin will be used as GPIO (see Product
Specification to see which one). */
#if defined (ENABLE_SWO)
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Serial << CLOCK_TRACECONFIG_TRACEMUX_Pos;
NRF_P1->PIN_CNF[0] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
#endif
/* Enable Trace functionality. If ENABLE_TRACE is not defined, TRACE pins will be used as GPIOs (see Product
Specification to see which ones). */
#if defined (ENABLE_TRACE)
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Parallel << CLOCK_TRACECONFIG_TRACEMUX_Pos;
NRF_P0->PIN_CNF[7] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P1->PIN_CNF[0] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P0->PIN_CNF[12] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P0->PIN_CNF[11] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
NRF_P1->PIN_CNF[9] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
#endif
/* Workaround for Errata 36 "CLOCK: Some registers are not reset when expected" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_36()){
NRF_CLOCK->EVENTS_DONE = 0;
NRF_CLOCK->EVENTS_CTTO = 0;
NRF_CLOCK->CTIV = 0;
}
/* Workaround for Errata 66 "TEMP: Linearity specification not met with default settings" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_66()){
NRF_TEMP->A0 = NRF_FICR->TEMP.A0;
NRF_TEMP->A1 = NRF_FICR->TEMP.A1;
NRF_TEMP->A2 = NRF_FICR->TEMP.A2;
NRF_TEMP->A3 = NRF_FICR->TEMP.A3;
NRF_TEMP->A4 = NRF_FICR->TEMP.A4;
NRF_TEMP->A5 = NRF_FICR->TEMP.A5;
NRF_TEMP->B0 = NRF_FICR->TEMP.B0;
NRF_TEMP->B1 = NRF_FICR->TEMP.B1;
NRF_TEMP->B2 = NRF_FICR->TEMP.B2;
NRF_TEMP->B3 = NRF_FICR->TEMP.B3;
NRF_TEMP->B4 = NRF_FICR->TEMP.B4;
NRF_TEMP->B5 = NRF_FICR->TEMP.B5;
NRF_TEMP->T0 = NRF_FICR->TEMP.T0;
NRF_TEMP->T1 = NRF_FICR->TEMP.T1;
NRF_TEMP->T2 = NRF_FICR->TEMP.T2;
NRF_TEMP->T3 = NRF_FICR->TEMP.T3;
NRF_TEMP->T4 = NRF_FICR->TEMP.T4;
}
/* Workaround for Errata 98 "NFCT: Not able to communicate with the peer" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_98()){
*(volatile uint32_t *)0x4000568Cul = 0x00038148ul;
}
/* Workaround for Errata 103 "CCM: Wrong reset value of CCM MAXPACKETSIZE" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_103()){
NRF_CCM->MAXPACKETSIZE = 0xFBul;
}
/* Workaround for Errata 115 "RAM: RAM content cannot be trusted upon waking up from System ON Idle or System OFF mode" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_115()){
*(volatile uint32_t *)0x40000EE4 = (*(volatile uint32_t *)0x40000EE4 & 0xFFFFFFF0) | (*(uint32_t *)0x10000258 & 0x0000000F);
}
/* Workaround for Errata 120 "QSPI: Data read or written is corrupted" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_120()){
*(volatile uint32_t *)0x40029640ul = 0x200ul;
}
/* Workaround for Errata 136 "System: Bits in RESETREAS are set when they should not be" found at the Errata document
for your device located at https://infocenter.nordicsemi.com/ */
if (errata_136()){
if (NRF_POWER->RESETREAS & POWER_RESETREAS_RESETPIN_Msk){
NRF_POWER->RESETREAS = ~POWER_RESETREAS_RESETPIN_Msk;
}
}
/* Enable the FPU if the compiler used floating point unit instructions. __FPU_USED is a MACRO defined by the
* compiler. Since the FPU consumes energy, remember to disable FPU use in the compiler if floating point unit
* operations are not used in your code. */
#if (__FPU_USED == 1)
SCB->CPACR |= (3UL << 20) | (3UL << 22);
__DSB();
__ISB();
#endif
/* Configure NFCT pins as GPIOs if NFCT is not to be used in your code. If CONFIG_NFCT_PINS_AS_GPIOS is not defined,
two GPIOs (see Product Specification to see which ones) will be reserved for NFC and will not be available as
normal GPIOs. */
#if defined (CONFIG_NFCT_PINS_AS_GPIOS)
if ((NRF_UICR->NFCPINS & UICR_NFCPINS_PROTECT_Msk) == (UICR_NFCPINS_PROTECT_NFC << UICR_NFCPINS_PROTECT_Pos)){
NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
NRF_UICR->NFCPINS &= ~UICR_NFCPINS_PROTECT_Msk;
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();
}
#endif
/* Configure GPIO pads as pPin Reset pin if Pin Reset capabilities desired. If CONFIG_GPIO_AS_PINRESET is not
defined, pin reset will not be available. One GPIO (see Product Specification to see which one) will then be
reserved for PinReset and not available as normal GPIO. */
#if defined (CONFIG_GPIO_AS_PINRESET)
if (((NRF_UICR->PSELRESET[0] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos)) ||
((NRF_UICR->PSELRESET[1] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos))){
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();
}
#endif
SystemCoreClockUpdate();
// Start the LF oscilator according to the mbed configuration (over the nrf5x_lf_clk_helper.h file)
NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_TO_USE << CLOCK_LFCLKSRC_SRC_Pos);
NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
NRF_CLOCK->TASKS_LFCLKSTART = 1;
// Wait for the external oscillator to start up.
while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0) {
// Do nothing.
}
/**
* Mbed HAL specific code section.
*
* The ITM has to be initialized before the SoftDevice which weren't guaranteed using the normal API.
*/
#if defined (DEVICE_ITM)
/* Enable SWO trace functionality */
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Serial << CLOCK_TRACECONFIG_TRACEMUX_Pos;
/* set SWO clock speed to 4 MHz */
NRF_CLOCK->TRACECONFIG = (NRF_CLOCK->TRACECONFIG & ~CLOCK_TRACECONFIG_TRACEPORTSPEED_Msk) |
(CLOCK_TRACECONFIG_TRACEPORTSPEED_4MHz << CLOCK_TRACECONFIG_TRACEPORTSPEED_Pos);
/* set SWO pin */
NRF_P0->PIN_CNF[18] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) |
(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
/* set prescaler */
TPI->ACPR = 0;
#endif
}
