Mercurial > ~darius > hgwebdir.cgi > stm32temp

annotate flash.c @ 18:afdd22502c2a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add i2c test code
author Daniel O'Connor <darius@dons.net.au>
date Wed, 14 Nov 2012 12:30:58 +1030
parents 58d76cf522ff
children bd8e2cf04034
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
1 #include <stdint.h>
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
2
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
3 #include "stm32f10x.h"
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
4 #include "spi.h"
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
5 #include "flash.h"
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
6
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
7 #define FL_SELECT() GPIO_ResetBits(GPIOA, GPIO_Pin_4)
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
8 #define FL_DESELECT() GPIO_SetBits(GPIOA, GPIO_Pin_4)
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
9
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
10 uint16_t
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
11 flashreadid(void) {
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
12 uint8_t fac, dev;
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
13
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
14 FL_SELECT(); /* Select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
15
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
16 SPI_WriteByte(FL_RDID); /* Send command */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
17 SPI_WriteByte(0x00); /* Send address cycles (ID data starts at 0) */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
18 SPI_WriteByte(0x00);
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
19 SPI_WriteByte(0x00);
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
20 fac = SPI_WriteByte(0x00); /* Read ID */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
21 dev = SPI_WriteByte(0x00);
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
22
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
23 FL_DESELECT(); /* De-select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
24
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
25 return fac << 8 | dev;
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
26 }
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
27
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
28 uint8_t
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
29 flashreadstatus(void) {
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
30 uint8_t status;
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
31
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
32 FL_SELECT(); /* Select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
33
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
34 SPI_WriteByte(FL_RDSR); /* Send command */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
35 SPI_WriteByte(0x00); /* Send dummy byte for address cycle */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
36 status = SPI_WriteByte(0x00); /* Read status */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
37
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
38 FL_DESELECT(); /* De-select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
39
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
40 return status;
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
41 }
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
42
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
43 void
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
44 flashwritestatus(uint8_t status) {
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
45 /* Enable status write */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
46 FL_SELECT(); /* Select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
47 SPI_WriteByte(FL_EWSR); /* Send command */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
48 SPI_WriteByte(0x00); /* Send data byte */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
49 FL_DESELECT();
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
50
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
51 /* Actually write status */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
52 FL_SELECT(); /* Re-select device for new command */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
53 SPI_WriteByte(FL_WRSR); /* Send command */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
54 SPI_WriteByte(status); /* Send data byte */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
55 FL_DESELECT(); /* De-select device */
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
56 }
58d76cf522ff Split out code into separate files.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
57