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Add W25Q80BV function to fast-read from device.

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This commit is contained in:
Jared Boone
2015-08-28 12:48:05 -07:00
parent 90e1653613
commit 7c98d3e14b
2 changed files with 25 additions and 0 deletions
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22
firmware/common/w25q80bv.c
View File

@ -243,3 +243,25 @@ void w25q80bv_program(uint32_t addr, uint32_t len, const uint8_t* data)
w25q80bv_page_program(addr, len, data);
}
}
void w25q80bv_read(uint32_t addr, uint32_t len, uint8_t* const data)
{
uint32_t i;
/* do nothing if we would overflow the flash */
if ((len > W25Q80BV_NUM_BYTES) || (addr > W25Q80BV_NUM_BYTES)
|| ((addr + len) > W25Q80BV_NUM_BYTES))
return;
w25q80bv_wait_while_busy();
gpio_clear(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
ssp_transfer(SSP0_NUM, W25Q80BV_FAST_READ);
ssp_transfer(SSP0_NUM, (addr >> 16) & 0xFF);
ssp_transfer(SSP0_NUM, (addr >> 8) & 0xFF);
ssp_transfer(SSP0_NUM, (addr >> 0) & 0xFF);
ssp_transfer(SSP0_NUM, 0xFF);
for (i = 0; i < len; i++)
data[i] = ssp_transfer(SSP0_NUM, 0xFF);
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
}

3
firmware/common/w25q80bv.h
View File

@ -27,6 +27,8 @@
#define W25Q80BV_NUM_PAGES 4096U
#define W25Q80BV_NUM_BYTES 1048576U
#define W25Q80BV_READ_DATA 0x03
#define W25Q80BV_FAST_READ 0x0b
#define W25Q80BV_WRITE_ENABLE 0x06
#define W25Q80BV_CHIP_ERASE 0xC7
#define W25Q80BV_READ_STATUS1 0x05
@ -51,5 +53,6 @@ void w25q80bv_chip_erase(void);
void w25q80bv_program(uint32_t addr, uint32_t len, const uint8_t* data);
uint8_t w25q80bv_get_device_id(void);
void w25q80bv_get_unique_id(w25q80bv_unique_id_t* unique_id);
void w25q80bv_read(uint32_t addr, uint32_t len, uint8_t* const data);
#endif//__W25Q80BV_H__