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use nRF SDK function to set up memory retention.

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This commit is contained in:
jun2sak 2021-02-25 02:34:43 +09:00
parent 9661d67cd3
commit f66896ce32
1 changed files with 15 additions and 4 deletions
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19
ports/nrf/common-hal/alarm/SleepMemory.c
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@ -28,6 +28,7 @@
#include <string.h>
#include "py/runtime.h"
#include "common-hal/alarm/SleepMemory.h"
#include "nrf_power.h"
#ifdef NRF_DEBUG_PRINT
extern void dbg_dump_RAMreg(void);
@ -51,14 +52,24 @@ void set_memory_retention(void) {
// set RAM[n].POWER register for RAM retention
// nRF52840 has RAM[0..7].Section[0..1] and RAM[8].Section[0..5]
// nRF52833 has RAM[0..7].Section[0..1] and RAM[8].Section[0,1]
for(int ram = 0; ram <= 7; ++ram) {
NRF_POWER->RAM[ram].POWERSET = 0x00030000; // RETENTION for section 0,1
for(int block = 0; block <= 7; ++block) {
nrf_power_rampower_mask_on(NRF_POWER, block,
NRF_POWER_RAMPOWER_S0RETENTION_MASK |
NRF_POWER_RAMPOWER_S1RETENTION_MASK);
};
#ifdef NRF52840
NRF_POWER->RAM[8].POWERSET = 0x001F0000; // RETENTION for section 0..5
nrf_power_rampower_mask_on(NRF_POWER, 8,
NRF_POWER_RAMPOWER_S0RETENTION_MASK |
NRF_POWER_RAMPOWER_S1RETENTION_MASK |
NRF_POWER_RAMPOWER_S2RETENTION_MASK |
NRF_POWER_RAMPOWER_S3RETENTION_MASK |
NRF_POWER_RAMPOWER_S4RETENTION_MASK |
NRF_POWER_RAMPOWER_S5RETENTION_MASK);
#endif
#ifdef NRF52833
NRF_POWER->RAM[8].POWERSET = 0x00030000; // RETENTION for section 0,1
nrf_power_rampower_mask_on(NRF_POWER, 8,
NRF_POWER_RAMPOWER_S0RETENTION_MASK |
NRF_POWER_RAMPOWER_S1RETENTION_MASK);
#endif
}