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*
* Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
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*
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/**
* @file otp.h
* One TIme Programmable ( OTP ) Flash routine/s.
*
* @author Lorenz Meier <lm@inf.ethz.ch>
* @author David "Buzz" Bussenschutt <davidbuzz@gmail.com>
*
*/
#ifndef OTP_H_
#define OTP_H_
__BEGIN_DECLS
#define ADDR_OTP_START 0x1FFF7800
#define ADDR_OTP_LOCK_START 0x1FFF7A00
#define OTP_LOCK_LOCKED 0x00
#define OTP_LOCK_UNLOCKED 0xFF
#include <unistd.h>
#include <stdio.h>
// possible flash statuses
#define F_BUSY 1
#define F_ERROR_WRP 2
#define F_ERROR_PROGRAM 3
#define F_ERROR_OPERATION 4
#define F_COMPLETE 5
typedef struct {
volatile uint32_t accesscontrol; // 0x00
volatile uint32_t key; // 0x04
volatile uint32_t optionkey; // 0x08
volatile uint32_t status; // 0x0C
volatile uint32_t control; // 0x10
volatile uint32_t optioncontrol; //0x14
} flash_registers;
#define PERIPH_BASE ((uint32_t)0x40000000) //Peripheral base address
#define AHB1PERIPH_BASE (PERIPH_BASE + 0x00020000)
#define F_R_BASE (AHB1PERIPH_BASE + 0x3C00)
#define FLASH ((flash_registers *) F_R_BASE)
#define F_BSY ((uint32_t)0x00010000) //FLASH Busy flag bit
#define F_OPERR ((uint32_t)0x00000002) //FLASH operation Error flag bit
#define F_WRPERR ((uint32_t)0x00000010) //FLASH Write protected error flag bit
#define CR_PSIZE_MASK ((uint32_t)0xFFFFFCFF)
#define F_PSIZE_WORD ((uint32_t)0x00000200)
#define F_PSIZE_BYTE ((uint32_t)0x00000000)
#define F_CR_PG ((uint32_t)0x00000001) // a bit in the F_CR register
#define F_CR_LOCK ((uint32_t)0x80000000) // also another bit.
#define F_KEY1 ((uint32_t)0x45670123)
#define F_KEY2 ((uint32_t)0xCDEF89AB)
#define IS_F_ADDRESS(ADDRESS) ((((ADDRESS) >= 0x08000000) && ((ADDRESS) < 0x080FFFFF)) || (((ADDRESS) >= 0x1FFF7800) && ((ADDRESS) < 0x1FFF7A0F)))
#pragma pack(push, 1)
/*
* The OTP area is divided into 16 OTP data blocks of 32 bytes and one lock OTP block of 16 bytes.
* The OTP data and lock blocks cannot be erased. The lock block contains 16 bytes LOCKBi (0 ≤ i ≤ 15)
* to lock the corresponding OTP data block (blocks 0 to 15). Each OTP data block can be programmed
* until the value 0x00 is programmed in the corresponding OTP lock byte. The lock bytes must only
* contain 0x00 and 0xFF values, otherwise the OTP bytes might not be taken into account correctly.
*/
struct otp {
// first 32 bytes = the '0' Block
char id[4]; ///4 bytes < 'P' 'X' '4' '\n'
uint8_t id_type; ///1 byte < 0 for USB VID, 1 for generic VID
uint32_t vid; ///4 bytes
uint32_t pid; ///4 bytes
char unused[19]; ///19 bytes
// Cert-of-Auth is next 4 blocks ie 1-4 ( where zero is first block )
char signature[128];
// insert extras here
uint32_t lock_bytes[4];
};
struct otp_lock {
uint8_t lock_bytes[16];
};
#pragma pack(pop)
#define ADDR_F_SIZE 0x1FFF7A22
#pragma pack(push, 1)
union udid {
uint32_t serial[3];
uint8_t data[12];
};
#pragma pack(pop)
/**
* s
*/
//__EXPORT float calc_indicated_airspeed(float differential_pressure);
__EXPORT void F_unlock(void);
__EXPORT void F_lock(void);
__EXPORT int val_read(void *dest, volatile const void *src, int bytes);
__EXPORT int val_write(volatile void *dest, const void *src, int bytes);
__EXPORT int write_otp(uint8_t id_type, uint32_t vid, uint32_t pid, char *signature);
__EXPORT int lock_otp(void);
__EXPORT int F_write_byte(uint32_t Address, uint8_t Data);
__EXPORT int F_write_word(uint32_t Address, uint32_t Data);
__END_DECLS
#endif
