48#include "dev/watchdog.h"
51#define PRINTF(...) printf(__VA_ARGS__)
53#define PRINTF(...) do {} while (0)
56#define SPI_FLASH_INS_WREN 0x06
57#define SPI_FLASH_INS_WRDI 0x04
58#define SPI_FLASH_INS_RDSR 0x05
59#define SPI_FLASH_INS_WRSR 0x01
60#define SPI_FLASH_INS_READ 0x03
61#define SPI_FLASH_INS_FAST_READ 0x0b
62#define SPI_FLASH_INS_PP 0x02
63#define SPI_FLASH_INS_SE 0xd8
64#define SPI_FLASH_INS_BE 0xc7
65#define SPI_FLASH_INS_DP 0xb9
66#define SPI_FLASH_INS_RES 0xab
76 SPI_WRITE(SPI_FLASH_INS_WREN);
83read_status_register(
void)
93 SPI_WRITE(SPI_FLASH_INS_RDSR);
112 u = read_status_register();
122erase_sector(
unsigned long offset)
132 SPI_WRITE_FAST(SPI_FLASH_INS_SE);
133 SPI_WRITE_FAST(offset >> 16);
134 SPI_WRITE_FAST(offset >> 8);
135 SPI_WRITE_FAST(offset >> 0);
136 SPI_WAITFORTx_ENDED();
150 P4DIR |= BV(FLASH_CS);
151 P5DIR |= BV(FLASH_HOLD);
160 unsigned char *p = _p;
161 const unsigned char *end = p + size;
168 SPI_WRITE_FAST(SPI_FLASH_INS_READ);
169 SPI_WRITE_FAST(offset >> 16);
170 SPI_WRITE_FAST(offset >> 8);
171 SPI_WRITE_FAST(offset >> 0);
172 SPI_WAITFORTx_ENDED();
175 for(; p < end; p++) {
187static const unsigned char *
188program_page(
unsigned long offset,
const unsigned char *p,
int nbytes)
190 const unsigned char *end = p + nbytes;
200 SPI_WRITE_FAST(SPI_FLASH_INS_PP);
201 SPI_WRITE_FAST(offset >> 16);
202 SPI_WRITE_FAST(offset >> 8);
203 SPI_WRITE_FAST(offset >> 0);
205 for(; p < end; p++) {
208 SPI_WAITFORTx_ENDED();
219 const unsigned char *p = _buf;
220 const unsigned long end =
addr + size;
221 unsigned long i, next_page;
223 for(i =
addr; i < end;) {
224 next_page = (i | 0xff) + 1;
225 if(next_page > end) {
228 p = program_page(i, p, next_page - i);
238 unsigned long end =
addr + size;
240 if(size % XMEM_ERASE_UNIT_SIZE != 0) {
241 PRINTF(
"xmem_erase: bad size\n");
245 if(
addr % XMEM_ERASE_UNIT_SIZE != 0) {
246 PRINTF(
"xmem_erase: bad offset\n");
250 for (;
addr < end;
addr += XMEM_ERASE_UNIT_SIZE) {
void watchdog_periodic(void)
Writes the WDT clear sequence.
void xmem_init(void)
Initialize the external memory.
int xmem_erase(long size, unsigned long addr)
Erase a sector in the flash memory.
int xmem_pwrite(const void *_buf, int size, unsigned long addr)
int xmem_pread(void *_p, int size, unsigned long addr)
Read a number of bytes from an offset in the external memory.
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
Header file to the external flash memory (XMem) API.