/
SST25VF.cpp
214 lines (167 loc) · 5.29 KB
/
SST25VF.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/************************************************************************************
*
* Name : SST25VF.cpp
* Author : Noah Shibley
* Date : Aug 17th, 2013
* Version : 0.1
* Notes : Based on SST code from: www.Beat707.com design. (Rugged Circuits and Wusik)
*
*
*
***********************************************************************************/
#include "SST25VF.h"
SST25VF::SST25VF(){
}
void SST25VF::begin(int chipSelect,int writeProtect,int hold){
//set pin #s
FLASH_SSn = chipSelect;
FLASH_Wp = writeProtect;
FLASH_Hold = hold;
pinMode(FLASH_Wp, OUTPUT);
digitalWrite(FLASH_Wp, HIGH); //write protect off
pinMode(FLASH_Hold, OUTPUT);
digitalWrite(FLASH_Hold, HIGH); //mem hold off
pinMode(FLASH_SSn, OUTPUT); //chip select
digitalWrite(FLASH_SSn, HIGH);
digitalWrite(FLASH_SSn, LOW);
sstSPISettings = SPISettings(SST25VF_SPI_CLOCK, SST25VF_SPI_BIT_ORDER, SST25VF_SPI_MODE);
SPI.begin();
SPI.usingInterrupt(255);
init();
readID();
}
void SST25VF::update(){
}
// ======================================================================================= //
void SST25VF::waitUntilDone()
{
uint8_t data = 0;
while (1)
{
digitalWrite(FLASH_SSn,LOW);
(void) SPI.transfer(0x05);
data = SPI.transfer(0);
digitalWrite(FLASH_SSn,HIGH);
if (!bitRead(data,0)) break;
nop();
}
}
// ======================================================================================= //
void SST25VF::init()
{
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
SPI.transfer(0x50); //enable write status register instruction
digitalWrite(FLASH_SSn,HIGH);
delay(50);
digitalWrite(FLASH_SSn,LOW);
SPI.transfer(0x01); //write the status register instruction
SPI.transfer(0x00);//value to write to register - xx0000xx will remove all block protection
digitalWrite(FLASH_SSn,HIGH);
delay(50);
SPI.endTransaction();
}
// ======================================================================================= //
void SST25VF::readID()
{
uint8_t id, mtype, dev;
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
(void) SPI.transfer(0x9F); // Read ID command
id = SPI.transfer(0);
mtype = SPI.transfer(0);
dev = SPI.transfer(0);
char buf[16] = {0};
sprintf(buf, "%02X %02X %02X", id, mtype, dev);
Serial.print("SPI ID ");
Serial.println(buf);
digitalWrite(FLASH_SSn,HIGH);
SPI.endTransaction();;
}
// ======================================================================================= //
void SST25VF::totalErase()
{
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
SPI.transfer(0x06);//write enable instruction
digitalWrite(FLASH_SSn,HIGH);
nop();
digitalWrite(FLASH_SSn, LOW);
(void) SPI.transfer(0x60); // Erase Chip //
digitalWrite(FLASH_SSn, HIGH);
waitUntilDone();
SPI.endTransaction();;
}
// ======================================================================================= //
void SST25VF::setAddress(uint32_t addr)
{
(void) SPI.transfer(addr >> 16);
(void) SPI.transfer(addr >> 8);
(void) SPI.transfer(addr);
}
// ======================================================================================= //
void SST25VF::readInit(uint32_t address)
{
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
(void) SPI.transfer(0x03); // Read Memory - 25/33 Mhz //
setAddress(address);
}
// ======================================================================================= //
uint8_t SST25VF::readNext() {
return SPI.transfer(0);
}
// ======================================================================================= //
void SST25VF::readFinish()
{
digitalWrite(FLASH_SSn,HIGH);
SPI.endTransaction();;
}
// ======================================================================================= //
void SST25VF::writeByte(uint32_t address, uint8_t data)
{
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
SPI.transfer(0x06);//write enable instruction
digitalWrite(FLASH_SSn,HIGH);
nop();
digitalWrite(FLASH_SSn,LOW);
(void) SPI.transfer(0x02); // Write Byte //
setAddress(address);
(void) SPI.transfer(data);
digitalWrite(FLASH_SSn,HIGH);
waitUntilDone();
SPI.endTransaction();;
}
uint32_t SST25VF::writeArray(uint32_t address,const uint8_t dataBuffer[],uint16_t dataLength)
{
for(uint16_t i=0;i<dataLength;i++)
{
writeByte((uint32_t)address+i,dataBuffer[i]);
}
return address + dataLength;
}
void SST25VF::readArray(uint32_t address,uint8_t dataBuffer[],uint16_t dataLength)
{
readInit((address));
for (uint16_t i=0; i<dataLength; ++i)
{
dataBuffer[i] = readNext();
}
readFinish();
}
// ======================================================================================= //
void SST25VF::sectorErase(uint8_t sectorAddress)
{
SPI.beginTransaction(sstSPISettings);
digitalWrite(FLASH_SSn,LOW);
SPI.transfer(0x06);//write enable instruction
digitalWrite(FLASH_SSn,HIGH);
nop();
digitalWrite(FLASH_SSn,LOW);
(void) SPI.transfer(0x20); // Erase 4KB Sector //
setAddress(4096UL*long(sectorAddress));
digitalWrite(FLASH_SSn,HIGH);
waitUntilDone();
SPI.endTransaction();;
}