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Switch iMX RT to RTC. Untested.

This commit is contained in:
Scott Shawcroft 2020-03-23 18:20:58 -07:00
parent 653b7619ec
commit a8ed6d993c
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GPG Key ID: 9349BC7E64B1921E
3 changed files with 47 additions and 16 deletions
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15
ports/mimxrt10xx/mphalport.c
View File

@ -33,21 +33,6 @@
#include "fsl_common.h"
void mp_hal_delay_ms(mp_uint_t delay) {
uint64_t start_tick = supervisor_ticks_ms64();
uint64_t duration = 0;
while (duration < delay) {
RUN_BACKGROUND_TASKS;
// Check to see if we've been CTRL-Ced by autoreload or the user.
if(MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception)) ||
MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_reload_exception))) {
break;
}
duration = (supervisor_ticks_ms64() - start_tick);
// TODO(tannewt): Go to sleep for a little while while we wait.
}
}
void mp_hal_delay_us(mp_uint_t delay) {
#if defined(MIMXRT1011_SERIES) || defined(MIMXRT1021_SERIES)
SDK_DelayAtLeastUs(delay, SystemCoreClock);

2
ports/mimxrt10xx/supervisor/internal_flash.c
View File

@ -183,7 +183,7 @@ uint32_t supervisor_flash_get_block_count(void) {
return CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE / FILESYSTEM_BLOCK_SIZE;
}
void supervisor_flash_flush(void) {
void port_internal_flash_flush(void) {
if (_flash_page_addr == NO_CACHE) return;
status_t status;

46
ports/mimxrt10xx/supervisor/port.c
View File

@ -341,6 +341,52 @@ uint32_t port_get_saved_word(void) {
return SNVS->LPGPR[1];
}
uint64_t port_get_raw_ticks(uint8_t* subticks) {
uint64_t ticks = 0;
uint64_t next_ticks = 1;
while (ticks != next_ticks) {
ticks = next_ticks;
next_ticks = ((uint64_t) SNVS->HPRTCMR) << 32 | SNVS->HPRTCLR;
}
if (subticks != NULL) {
*subticks = ticks % 32;
}
return ticks / 32;
}
// Enable 1/1024 second tick.
void port_enable_tick(void) {
uint32_t hpcr = SNVS->HPCR;
hpcr &= ~SNVS_HPCR_PI_FREQ_MASK;
SNVS->HPCR = hpcr | SNVS_HPCR_PI_FREQ(5) | SNVS_HPCR_PI_EN_MASK;
}
// Disable 1/1024 second tick.
void port_disable_tick(void) {
SNVS->HPCR &= ~SNVS_HPCR_PI_EN_MASK;
}
void port_interrupt_after_ticks(uint32_t ticks) {
uint8_t subticks;
uint64_t current_ticks = port_get_raw_ticks(&subticks);
current_ticks += ticks;
SNVS->HPTALR = current_ticks << 5 | subticks;
SNVS->HPTAMR = current_ticks >> (32 - 5);
SNVS->HPCR |= SNVS_HPCR_HPTA_EN_MASK;
}
void port_sleep_until_interrupt(void) {
// App note here: https://www.nxp.com/docs/en/application-note/AN12085.pdf
// Clear the FPU interrupt because it can prevent us from sleeping.
if (__get_FPSCR() & ~(0x9f)) {
__set_FPSCR(__get_FPSCR() & ~(0x9f));
(void) __get_FPSCR();
}
// Call wait for interrupt ourselves if the SD isn't enabled.
__WFI();
}
/**
* \brief Default interrupt handler for unused IRQs.
*/