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Basic Arduino UNO Bluetooth Testing with the BLE 4.0 (CC2541, MLT-BT04 IC)
Post 303043348 by Neo on Saturday 25th of January 2020 09:25:19 AM
01-25-2020
Administrator
Here is the chip.... as I find these kind of details matter and are often omitted on these kinds of Internet tutorials and discussions. I will replace this photo (taken quickly with my iPhone) with a screen shot from my computer when I find the USB cable to my little microscope.
In fact, the way I got this test to work (finding a starting point sketch) was to use my microscope to read the model number on the chip: the CC2541
A number of times recently, I received some modules with the model number of the chip "burned off" with a laser, which is really annoying.
Update: Here is the same chip shot using the USB interface to my Mac Pro :
Both "chip shots" were taken though the plastic wrapper around the BLE module... that is why the image is a bit blurry)
In fact, the way I got this test to work (finding a starting point sketch) was to use my microscope to read the model number on the chip: the CC2541
A number of times recently, I received some modules with the model number of the chip "burned off" with a laser, which is really annoying.
Update: Here is the same chip shot using the USB interface to my Mac Pro :
Both "chip shots" were taken though the plastic wrapper around the BLE module... that is why the image is a bit blurry)
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LEARN ABOUT CENTOS
struct_nand_ecc_ctrl
STRUCT
NAND_ECC_CTRL(9) Structures STRUCT NAND_ECC_CTRL(9) NAME
struct_nand_ecc_ctrl - Control structure for ECC SYNOPSIS
struct nand_ecc_ctrl { nand_ecc_modes_t mode; int steps; int size; int bytes; int total; int strength; int prepad; int postpad; struct nand_ecclayout * layout; void * priv; void (* hwctl) (struct mtd_info *mtd, int mode); int (* calculate) (struct mtd_info *mtd, const uint8_t *dat,uint8_t *ecc_code); int (* correct) (struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,uint8_t *calc_ecc); int (* read_page_raw) (struct mtd_info *mtd, struct nand_chip *chip,uint8_t *buf, int oob_required, int page); int (* write_page_raw) (struct mtd_info *mtd, struct nand_chip *chip,const uint8_t *buf, int oob_required); int (* read_page) (struct mtd_info *mtd, struct nand_chip *chip,uint8_t *buf, int oob_required, int page); int (* read_subpage) (struct mtd_info *mtd, struct nand_chip *chip,uint32_t offs, uint32_t len, uint8_t *buf); int (* write_subpage) (struct mtd_info *mtd, struct nand_chip *chip,uint32_t offset, uint32_t data_len,const uint8_t *data_buf, int oob_required); int (* write_page) (struct mtd_info *mtd, struct nand_chip *chip,const uint8_t *buf, int oob_required); int (* write_oob_raw) (struct mtd_info *mtd, struct nand_chip *chip,int page); int (* read_oob_raw) (struct mtd_info *mtd, struct nand_chip *chip,int page); int (* read_oob) (struct mtd_info *mtd, struct nand_chip *chip, int page); int (* write_oob) (struct mtd_info *mtd, struct nand_chip *chip,int page); }; MEMBERS
mode ECC mode steps number of ECC steps per page size data bytes per ECC step bytes ECC bytes per step total total number of ECC bytes per page strength max number of correctible bits per ECC step prepad padding information for syndrome based ECC generators postpad padding information for syndrome based ECC generators layout ECC layout control struct pointer priv pointer to private ECC control data hwctl function to control hardware ECC generator. Must only be provided if an hardware ECC is available calculate function for ECC calculation or readback from ECC hardware correct function for ECC correction, matching to ECC generator (sw/hw) read_page_raw function to read a raw page without ECC write_page_raw function to write a raw page without ECC read_page function to read a page according to the ECC generator requirements; returns maximum number of bitflips corrected in any single ECC step, 0 if bitflips uncorrectable, -EIO hw error read_subpage function to read parts of the page covered by ECC; returns same as read_page write_subpage function to write parts of the page covered by ECC. write_page function to write a page according to the ECC generator requirements. write_oob_raw function to write chip OOB data without ECC read_oob_raw function to read chip OOB data without ECC read_oob function to read chip OOB data write_oob function to write chip OOB data AUTHOR
Thomas Gleixner <tglx@linutronix.de> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT NAND_ECC_CTRL(9)