1  /*
 2    PSRAM driver for IPS6404
 3  */
 4  
 5  #ifndef _PSRAM_T_H_
 6  #define _PSRAM_T_H_
 7  
 8  #ifdef __cplusplus
 9  #include <Arduino.h>
10  #include "platform_config.h"
11  
12  #ifdef HAS_PSRAM
13  #define PAGE_SIZE    16 //32 //2048 //1024
14  #define MAX_PAGES    8
15  #else
16  #define PAGE_SIZE    256
17  #define MAX_PAGES    8 
18  #endif
19  
20  struct Page {
21     uint8_t  page[PAGE_SIZE];
22     uint32_t pageid;
23     int8_t next;
24     int8_t prev;
25  };
26  
27  class PSRAM_T
28  {
29    public:
30      PSRAM_T(uint8_t _CS, uint8_t _MOSI=11, uint8_t _SCLK=13, uint8_t _MISO=12);
31      void begin(void);
32      void pswrite(uint32_t addr, uint8_t val);
33      uint8_t psread(uint32_t addr);
34      uint16_t psread_w(uint32_t addr);
35     
36    private:
37      static uint8_t psram_read(uint32_t addr);
38      static void psram_read_n(uint32_t addr, uint8_t * val, int n);
39      static void psram_write(uint32_t addr, uint8_t val);
40      static void psram_write_n(uint32_t addr, uint8_t * val, int n);
41     
42    protected:
43      static uint8_t _cs, _miso, _mosi, _sclk;
44      static Page pages[MAX_PAGES];
45      static uint8_t nbPages;
46      static int8_t top;
47      static int8_t last;
48  };
49  #endif
50  
51  #endif
52