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Add esp/rtcmem_regs.h

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This commit is contained in:
Alex Stewart 2015-08-21 14:20:00 -07:00
parent fdbb361a60
commit 2f3b82812b
2 changed files with 48 additions and 3 deletions
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7
core/include/esp/registers.h
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@ -22,6 +22,7 @@
#include "esp/gpio_regs.h" #include "esp/gpio_regs.h"
#include "esp/timer_regs.h" #include "esp/timer_regs.h"
#include "esp/wdt_regs.h" #include "esp/wdt_regs.h"
#include "esp/rtcmem_regs.h"
#include "esp/dport_regs.h" #include "esp/dport_regs.h"
/* Register base addresses /* Register base addresses
@ -41,8 +42,8 @@
//#define WDT_BASE (MMIO_BASE + 0x0900) //#define WDT_BASE (MMIO_BASE + 0x0900)
#define I2C_BASE (MMIO_BASE + 0x0d00) #define I2C_BASE (MMIO_BASE + 0x0d00)
//#define UART1_BASE (MMIO_BASE + 0x0F00) //#define UART1_BASE (MMIO_BASE + 0x0F00)
#define RTCB_BASE (MMIO_BASE + 0x1000) //#define RTCB_BASE (MMIO_BASE + 0x1000)
#define RTCS_BASE (MMIO_BASE + 0x1100) //#define RTCS_BASE (MMIO_BASE + 0x1100)
#define RTCU_BASE (MMIO_BASE + 0x1200) //#define RTCU_BASE (MMIO_BASE + 0x1200)
#endif #endif

44
core/include/esp/rtcmem_regs.h Normal file
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@ -0,0 +1,44 @@
/* esp/rtcmem_regs.h
*
* ESP8266 RTC semi-persistent memory register definitions
*
* Not compatible with ESP SDK register access code.
*/
#ifndef _ESP_RTCMEM_REGS_H
#define _ESP_RTCMEM_REGS_H
#include "esp/types.h"
#include "common_macros.h"
/* The RTC memory is a range of 256 words (1 KB) of general-purpose memory
* within the Real Time Clock peripheral. Because it's part of the RTC, it
* continues to be powered (and retains its contents) even when the ESP8266 is
* in its deepest sleep mode (and other RAM is lost). It can therefore be
* useful for keeping data which must be persisted through sleep or a reset.
*
* Note, however, that it is not "battery backed", or flash memory, and thus
* will not keep its contents if power is removed entirely.
*/
// We could just define these as 'volatile uint32_t *', but doing things this
// way means that the RTCMEM* defines will include array size information, so
// the C compiler can do bounds-checking for static arguments.
typedef volatile uint32_t rtcmem_array64_t[64];
typedef volatile uint32_t rtcmem_array128_t[128];
typedef volatile uint32_t rtcmem_array256_t[256];
#define RTCMEM_BASE 0x60001000
/* RTCMEM is an array covering the entire semi-persistent memory range */
#define RTCMEM (*(rtcmem_array256_t *)(RTCMEM_BASE))
/* RTCMEM_BACKUP / RTCMEM_SYSTEM / RTCMEM_USER are the same range, divided up
* into chunks by application/use, as defined by Espressif */
#define RTCMEM_BACKUP (*(rtcmem_array64_t *)(RTCMEM_BASE))
#define RTCMEM_SYSTEM (*(rtcmem_array64_t *)(RTCMEM_BASE + 0x100))
#define RTCMEM_USER (*(rtcmem_array128_t *)(RTCMEM_BASE + 0x200))
#endif /* _ESP_RTCMEM_REGS_H */