Arrow / W25Q32

Winbond W25Q32 SPI library. Tested on Winbond W74M32 embedded on Hani-IoT. Based on https://os.mbed.com/users/perezalvarezhi/code/W25Q80BV/

W25Q32.h@0:cc8118fdcc22, 2020-01-08 (annotated)

Committer:
Pawel Zarembski
Date:
Wed Jan 08 11:13:52 2020 +0100
Revision:
0:cc8118fdcc22
Child:
1:d3928deefb53
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pawel Zarembski 0:cc8118fdcc22 1 #ifndef W25Q32_H
Pawel Zarembski 0:cc8118fdcc22 2 #define W25Q32_H
Pawel Zarembski 0:cc8118fdcc22 3
Pawel Zarembski 0:cc8118fdcc22 4 #include "mbed.h"
Pawel Zarembski 0:cc8118fdcc22 5
Pawel Zarembski 0:cc8118fdcc22 6 #define SPI_FREQ 1000000
Pawel Zarembski 0:cc8118fdcc22 7 #define SPI_MODE 0
Pawel Zarembski 0:cc8118fdcc22 8 #define SPI_NBIT 8
Pawel Zarembski 0:cc8118fdcc22 9
Pawel Zarembski 0:cc8118fdcc22 10 #define WRITE_ENABLE 0x06
Pawel Zarembski 0:cc8118fdcc22 11 #define WRITE_DISABLE 0x04
Pawel Zarembski 0:cc8118fdcc22 12 #define READ_DATA 0x03
Pawel Zarembski 0:cc8118fdcc22 13 #define WRITE_DATA 0x02
Pawel Zarembski 0:cc8118fdcc22 14 #define CHIP_ERASE 0x60
Pawel Zarembski 0:cc8118fdcc22 15 #define DEV_ID 0x90
Pawel Zarembski 0:cc8118fdcc22 16
Pawel Zarembski 0:cc8118fdcc22 17 #define DUMMY_ADDR 0x00
Pawel Zarembski 0:cc8118fdcc22 18 #define WAIT_TIME 1000
Pawel Zarembski 0:cc8118fdcc22 19
Pawel Zarembski 0:cc8118fdcc22 20 #define ADDR_BMASK2 0x00ff0000
Pawel Zarembski 0:cc8118fdcc22 21 #define ADDR_BMASK1 0x0000ff00
Pawel Zarembski 0:cc8118fdcc22 22 #define ADDR_BMASK0 0x000000ff
Pawel Zarembski 0:cc8118fdcc22 23
Pawel Zarembski 0:cc8118fdcc22 24 #define ADDR_BSHIFT2 16
Pawel Zarembski 0:cc8118fdcc22 25 #define ADDR_BSHIFT1 8
Pawel Zarembski 0:cc8118fdcc22 26 #define ADDR_BSHIFT0 0
Pawel Zarembski 0:cc8118fdcc22 27
Pawel Zarembski 0:cc8118fdcc22 28 class W25Q80BV {
Pawel Zarembski 0:cc8118fdcc22 29 public:
Pawel Zarembski 0:cc8118fdcc22 30 W25Q80BV(PinName mosi, PinName miso, PinName sclk, PinName cs);
Pawel Zarembski 0:cc8118fdcc22 31
Pawel Zarembski 0:cc8118fdcc22 32 int readByte(int addr); // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location
Pawel Zarembski 0:cc8118fdcc22 33 int readByte(int a2, int a1, int a0); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0]
Pawel Zarembski 0:cc8118fdcc22 34 void readStream(int addr, char* buf, int count); // takes a 24-bit address, reads count bytes, and stores results in buf
Pawel Zarembski 0:cc8118fdcc22 35
Pawel Zarembski 0:cc8118fdcc22 36 void writeByte(int addr, int data); // takes a 24-bit (3 bytes) address and a byte of data to write at that location
Pawel Zarembski 0:cc8118fdcc22 37 void writeByte(int a2, int a1, int a0, int data); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0]
Pawel Zarembski 0:cc8118fdcc22 38 void writeStream(int addr, char* buf, int count); // write count bytes of data from buf to memory, starting at addr
Pawel Zarembski 0:cc8118fdcc22 39
Pawel Zarembski 0:cc8118fdcc22 40 void chipErase(); // erase all data on chip
Pawel Zarembski 0:cc8118fdcc22 41 int getMID( ) ; // get the manufacturer ID
Pawel Zarembski 0:cc8118fdcc22 42
Pawel Zarembski 0:cc8118fdcc22 43 private:
Pawel Zarembski 0:cc8118fdcc22 44 void writeEnable(); // write enable
Pawel Zarembski 0:cc8118fdcc22 45 void writeDisable(); // write disable
Pawel Zarembski 0:cc8118fdcc22 46 void chipEnable(); // chip enable
Pawel Zarembski 0:cc8118fdcc22 47 void chipDisable(); // chip disable
Pawel Zarembski 0:cc8118fdcc22 48 int writeSPI(int data); // software SPI write
Pawel Zarembski 0:cc8118fdcc22 49
Pawel Zarembski 0:cc8118fdcc22 50 // SPI inputs/outputs
Pawel Zarembski 0:cc8118fdcc22 51 DigitalOut _cs;
Pawel Zarembski 0:cc8118fdcc22 52 DigitalOut _mosi;
Pawel Zarembski 0:cc8118fdcc22 53 DigitalIn _miso;
Pawel Zarembski 0:cc8118fdcc22 54 DigitalOut _sclk;
Pawel Zarembski 0:cc8118fdcc22 55 };
Pawel Zarembski 0:cc8118fdcc22 56
Pawel Zarembski 0:cc8118fdcc22 57 #endif