179 lines
4.6 KiB
C
179 lines
4.6 KiB
C
//w25x20cl.c
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#include "w25x20cl.h"
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include "io_atmega2560.h"
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#include "spi.h"
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#define _MFRID 0xEF
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#define _DEVID 0x11
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#define _CMD_ENABLE_WR 0x06
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#define _CMD_ENABLE_WR_VSR 0x50
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#define _CMD_DISABLE_WR 0x04
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#define _CMD_RD_STATUS_REG 0x05
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#define _CMD_WR_STATUS_REG 0x01
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#define _CMD_RD_DATA 0x03
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#define _CMD_RD_FAST 0x0b
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#define _CMD_RD_FAST_D_O 0x3b
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#define _CMD_RD_FAST_D_IO 0xbb
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#define _CMD_PAGE_PROGRAM 0x02
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#define _CMD_SECTOR_ERASE 0x20
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#define _CMD_BLOCK32_ERASE 0x52
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#define _CMD_BLOCK64_ERASE 0xd8
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#define _CMD_CHIP_ERASE 0xc7
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#define _CMD_CHIP_ERASE2 0x60
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#define _CMD_PWR_DOWN 0xb9
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#define _CMD_PWR_DOWN_REL 0xab
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#define _CMD_MFRID_DEVID 0x90
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#define _CMD_MFRID_DEVID_D 0x92
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#define _CMD_JEDEC_ID 0x9f
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#define _CMD_RD_UID 0x4b
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#define _CS_LOW() PORT(W25X20CL_PIN_CS) &= ~__MSK(W25X20CL_PIN_CS)
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#define _CS_HIGH() PORT(W25X20CL_PIN_CS) |= __MSK(W25X20CL_PIN_CS)
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//#define _SPI_TX swspi_tx
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//#define _SPI_RX swspi_rx
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#define _SPI_TX(b) spi_txrx(b)
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#define _SPI_RX() spi_txrx(0xff)
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int w25x20cl_mfrid_devid(void);
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int8_t w25x20cl_ini(void)
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{
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PIN_OUT(W25X20CL_PIN_CS);
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_CS_HIGH();
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if (!w25x20cl_mfrid_devid()) return 0;
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return 1;
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}
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void w25x20cl_enable_wr(void)
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{
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_CS_LOW();
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_SPI_TX(_CMD_ENABLE_WR); // send command 0x06
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_CS_HIGH();
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}
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void w25x20cl_disable_wr(void)
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{
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_CS_LOW();
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_SPI_TX(_CMD_DISABLE_WR); // send command 0x04
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_CS_HIGH();
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}
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uint8_t w25x20cl_rd_status_reg(void)
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{
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_CS_LOW();
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_SPI_TX(_CMD_RD_STATUS_REG); // send command 0x90
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uint8_t val = _SPI_RX(); // receive value
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_CS_HIGH();
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return val;
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}
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void w25x20cl_wr_status_reg(uint8_t val)
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{
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_CS_LOW();
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_SPI_TX(_CMD_WR_STATUS_REG); // send command 0x90
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_SPI_TX(val); // send value
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_CS_HIGH();
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}
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void w25x20cl_rd_data(uint32_t addr, uint8_t* data, uint16_t cnt)
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{
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_CS_LOW();
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_SPI_TX(_CMD_RD_DATA); // send command 0x03
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_SPI_TX(((uint8_t*)&addr)[2]); // send addr bits 16..23
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_SPI_TX(((uint8_t*)&addr)[1]); // send addr bits 8..15
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_SPI_TX(((uint8_t*)&addr)[0]); // send addr bits 0..7
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while (cnt--) // receive data
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*(data++) = _SPI_RX();
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_CS_HIGH();
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}
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void w25x20cl_page_program(uint32_t addr, uint8_t* data, uint16_t cnt)
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{
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_CS_LOW();
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_SPI_TX(_CMD_PAGE_PROGRAM); // send command 0x02
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_SPI_TX(((uint8_t*)&addr)[2]); // send addr bits 16..23
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_SPI_TX(((uint8_t*)&addr)[1]); // send addr bits 8..15
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_SPI_TX(((uint8_t*)&addr)[0]); // send addr bits 0..7
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while (cnt--) // send data
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_SPI_TX(*(data++));
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_CS_HIGH();
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}
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void w25x20cl_page_program_P(uint32_t addr, uint8_t* data, uint16_t cnt)
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{
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_CS_LOW();
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_SPI_TX(_CMD_PAGE_PROGRAM); // send command 0x02
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_SPI_TX(((uint8_t*)&addr)[2]); // send addr bits 16..23
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_SPI_TX(((uint8_t*)&addr)[1]); // send addr bits 8..15
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_SPI_TX(((uint8_t*)&addr)[0]); // send addr bits 0..7
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while (cnt--) // send data
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_SPI_TX(pgm_read_byte(data++));
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_CS_HIGH();
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}
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void w25x20cl_erase(uint8_t cmd, uint32_t addr)
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{
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_CS_LOW();
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_SPI_TX(_CMD_SECTOR_ERASE); // send command 0x20
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_SPI_TX(((uint8_t*)&addr)[2]); // send addr bits 16..23
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_SPI_TX(((uint8_t*)&addr)[1]); // send addr bits 8..15
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_SPI_TX(((uint8_t*)&addr)[0]); // send addr bits 0..7
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_CS_HIGH();
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}
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void w25x20cl_sector_erase(uint32_t addr)
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{
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return w25x20cl_erase(_CMD_SECTOR_ERASE, addr);
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}
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void w25x20cl_block32_erase(uint32_t addr)
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{
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return w25x20cl_erase(_CMD_BLOCK32_ERASE, addr);
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}
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void w25x20cl_block64_erase(uint32_t addr)
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{
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return w25x20cl_erase(_CMD_BLOCK64_ERASE, addr);
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}
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void w25x20cl_chip_erase(void)
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{
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_CS_LOW();
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_SPI_TX(_CMD_CHIP_ERASE); // send command 0xc7
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_CS_HIGH();
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}
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void w25x20cl_rd_uid(uint8_t* uid)
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{
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_CS_LOW();
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_SPI_TX(_CMD_RD_UID); // send command 0x4b
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uint8_t cnt = 4; // 4 dummy bytes
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while (cnt--) // receive dummy bytes
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_SPI_RX();
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cnt = 8; // 8 bytes UID
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while (cnt--) // receive UID
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uid[7 - cnt] = _SPI_RX();
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_CS_HIGH();
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}
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int w25x20cl_mfrid_devid(void)
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{
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_CS_LOW();
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_SPI_TX(_CMD_MFRID_DEVID); // send command 0x90
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uint8_t cnt = 3; // 3 address bytes
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while (cnt--) // send address bytes
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_SPI_TX(0x00);
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uint8_t w25x20cl_mfrid = _SPI_RX(); // receive mfrid
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uint8_t w25x20cl_devid = _SPI_RX(); // receive devid
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_CS_HIGH();
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return ((w25x20cl_mfrid == _MFRID) && (w25x20cl_devid == _DEVID));
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}
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