diff options
Diffstat (limited to 'src/target/dsp5680xx.h')
| -rw-r--r-- | src/target/dsp5680xx.h | 79 |
1 files changed, 78 insertions, 1 deletions
diff --git a/src/target/dsp5680xx.h b/src/target/dsp5680xx.h index 50ab9907..a5747240 100644 --- a/src/target/dsp5680xx.h +++ b/src/target/dsp5680xx.h @@ -25,6 +25,19 @@ #include <jtag/jtag.h> +/** + * @file dsp5680xx.h + * @author Rodrigo Rosa <rodrigorosa.LG@gmail.com> + * @date Thu Jun 9 18:54:38 2011 + * + * @brief Basic support for the 5680xx DSP from Freescale. + * The chip has two taps in the JTAG chain, the Master tap and the Core tap. + * In this code the Master tap is only used to unlock the flash memory by executing a JTAG instruction. + * + * + */ + + #define S_FILE_DATA_OFFSET 0x200000 //---------------------------------------------------------------- @@ -160,6 +173,11 @@ #define HFM_USTAT_MASK_BLANK 0x4 #define HFM_USTAT_MASK_PVIOL_ACCER 0x30 +/** + * The value used on for the FM clock is important to prevent flashing errors and to prevent deterioration of the FM. + * This value was calculated using a spreadsheet tool available on the Freescale website under FAQ 25464. + * + */ #define HFM_CLK_DEFAULT 0x40 #define HFM_FLASH_BASE_ADDR 0x0 #define HFM_SIZE_BYTES 0x4000 // bytes @@ -168,10 +186,12 @@ #define HFM_SECTOR_COUNT 0x20 // A 16K block in pages of 256 words. +/** + * Writing HFM_LOCK_FLASH to HFM_LOCK_ADDR_L and HFM_LOCK_ADDR_H will enable security on flash after the next reset. + */ #define HFM_LOCK_FLASH 0xE70A #define HFM_LOCK_ADDR_L 0x1FF7 #define HFM_LOCK_ADDR_H 0x1FF8 -// Writing HFM_LOCK_FLASH to HFM_LOCK_ADDR_L and HFM_LOCK_ADDR_H will enable security on flash after the next reset. //---------------------------------------------------------------- //---------------------------------------------------------------- @@ -203,12 +223,69 @@ static inline struct dsp5680xx_common *target_to_dsp5680xx(struct target *target return target->arch_info; } +/** + * Writes to flash memory. + * Does not check if flash is erased, it's up to the user to erase the flash before running this function. + * + * @param target + * @param buffer + * @param address + * @param count In bytes. + * + * @return + */ int dsp5680xx_f_wr(struct target * target, uint8_t *buffer, uint32_t address, uint32_t count); +/** + * The FM has the funcionality of checking if the flash array is erased. This function executes it. It does not support individual sector analysis. + * + * @param target + * @param erased + * @param sector This parameter is ignored because the FM does not support checking if individual sectors are erased. + * + * @return + */ int dsp5680xx_f_erase_check(struct target * target,uint8_t * erased, uint32_t sector); + +/** + * Erases either a sector or the complete flash array. If either the range first-last covers the complete array or if @first == 0 and @last == 0 then a mass erase command is executed on the FM. If not, then individual sectors are erased. + * + * @param target + * @param first + * @param last + * + * @return + */ int dsp5680xx_f_erase(struct target * target, int first, int last); + +/** + * Reads the memory mapped protection register. + * + * @param target + * @param protected Data read from the protection register. + * + * @return + */ int dsp5680xx_f_protect_check(struct target * target, uint16_t * protected); + +/** + * Writes the flash security words with a specific value. The chip's security will be enabled after the first reset following the execution of this function. + * + * @param target + * + * @return + */ int dsp5680xx_f_lock(struct target * target); + +/** + * Executes a mass erase command. The must be done from the Master tap. + * It is up to the user to select the master tap (jtag tapenable dsp5680xx.chp) before running this function. + * The flash array will be unsecured (and erased) after the first reset following the execution of this function. + * + * @param target + * + * @return + */ int dsp5680xx_f_unlock(struct target * target); #endif // dsp5680xx.h |