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);
83 read_status_register(
void)
92 SPI_WRITE(SPI_FLASH_INS_RDSR);
111 u = read_status_register();
121 erase_sector(
unsigned long offset)
131 SPI_WRITE_FAST(SPI_FLASH_INS_SE);
132 SPI_WRITE_FAST(offset >> 16);
133 SPI_WRITE_FAST(offset >> 8);
134 SPI_WRITE_FAST(offset >> 0);
135 SPI_WAITFORTx_ENDED();
150 P4DIR |= BV(FLASH_CS) | BV(FLASH_HOLD) | BV(FLASH_PWR);
151 P4OUT |= BV(FLASH_PWR);
156 SPI_WRITE_FAST(SPI_FLASH_INS_RES);
157 SPI_WAITFORTx_ENDED();
165 xmem_pread(
void *_p,
int size,
unsigned long offset)
167 unsigned char *p = _p;
168 const unsigned char *end = p + size;
176 SPI_WRITE_FAST(SPI_FLASH_INS_READ);
177 SPI_WRITE_FAST(offset >> 16);
178 SPI_WRITE_FAST(offset >> 8);
179 SPI_WRITE_FAST(offset >> 0);
180 SPI_WAITFORTx_ENDED();
183 for(; p < end; p++) {
195 static const unsigned char *
196 program_page(
unsigned long offset,
const unsigned char *p,
int nbytes)
198 const unsigned char *end = p + nbytes;
207 SPI_WRITE_FAST(SPI_FLASH_INS_PP);
208 SPI_WRITE_FAST(offset >> 16);
209 SPI_WRITE_FAST(offset >> 8);
210 SPI_WRITE_FAST(offset >> 0);
212 for(; p < end; p++) {
215 SPI_WAITFORTx_ENDED();
224 xmem_pwrite(
const void *_buf,
int size,
unsigned long addr)
226 const unsigned char *p = _buf;
227 const unsigned long end = addr + size;
228 unsigned long i, next_page;
230 for(i = addr; i < end;) {
231 next_page = (i | 0xff) + 1;
232 if(next_page > end) {
235 p = program_page(i, p, next_page - i);
243 xmem_erase(
long size,
unsigned long addr)
245 unsigned long end = addr + size;
247 if(size % XMEM_ERASE_UNIT_SIZE != 0) {
248 PRINTF(
"xmem_erase: bad size\n");
252 if(addr % XMEM_ERASE_UNIT_SIZE != 0) {
253 PRINTF(
"xmem_erase: bad offset\n");
257 for (; addr < end; addr += XMEM_ERASE_UNIT_SIZE) {
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
static bool write_enable(const spi_device_t *flash_spi_configuration)
Enable write.
static bool wait_ready(const spi_device_t *flash_spi_configuration)
Wait till previous erase/program operation completes.
void watchdog_periodic(void)
Writes the WDT clear sequence.