Diff: FreescaleIAP/FreescaleIAP.cpp

Revision:

8:00cefe0d59ed

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FreescaleIAP/FreescaleIAP.cpp	Sat Apr 23 18:24:07 2016 +0000
@@ -0,0 +1,241 @@
+#include "FreescaleIAP.h"
+
+//#define IAPDEBUG
+
+#ifdef TARGET_K64F
+//For K64F
+#   include "MK64F12.h"
+#   define USE_ProgramPhrase 1
+#   define FTFA                        FTFE
+#   define FTFA_FSTAT_FPVIOL_MASK      FTFE_FSTAT_FPVIOL_MASK 
+#   define FTFA_FSTAT_ACCERR_MASK      FTFE_FSTAT_ACCERR_MASK
+#   define FTFA_FSTAT_RDCOLERR_MASK    FTFE_FSTAT_RDCOLERR_MASK
+#   define FTFA_FSTAT_CCIF_MASK        FTFE_FSTAT_CCIF_MASK
+#   define FTFA_FSTAT_MGSTAT0_MASK     FTFE_FSTAT_MGSTAT0_MASK
+#else
+//Different names used on at least the K20:
+#   ifndef FTFA_FSTAT_FPVIOL_MASK
+#       define FTFA                        FTFL
+#       define FTFA_FSTAT_FPVIOL_MASK      FTFL_FSTAT_FPVIOL_MASK 
+#       define FTFA_FSTAT_ACCERR_MASK      FTFL_FSTAT_ACCERR_MASK
+#       define FTFA_FSTAT_RDCOLERR_MASK    FTFL_FSTAT_RDCOLERR_MASK
+#       define FTFA_FSTAT_CCIF_MASK        FTFL_FSTAT_CCIF_MASK
+#       define FTFA_FSTAT_MGSTAT0_MASK     FTFL_FSTAT_MGSTAT0_MASK
+#   endif
+#endif
+
+
+enum FCMD {
+    Read1s = 0x01,
+    ProgramCheck = 0x02,
+    ReadResource = 0x03,
+    ProgramLongword = 0x06,
+    ProgramPhrase = 0x07,    
+    EraseSector = 0x09,
+    Read1sBlock = 0x40,
+    ReadOnce = 0x41,
+    ProgramOnce = 0x43,
+    EraseAll = 0x44,
+    VerifyBackdoor = 0x45
+    };
+
+inline void run_command(void);
+bool check_boundary(int address, unsigned int length);
+bool check_align(int address);
+IAPCode verify_erased(int address, unsigned int length);
+IAPCode check_error(void);
+IAPCode program_word(int address, char *data);
+    
+__attribute__((section(".ARM.__at_0x79420"))) IAPCode erase_sector(int address) {
+    #ifdef IAPDEBUG
+    printf("IAP: Erasing at %x\r\n", address);
+    #endif
+    if (check_align(address))
+        return AlignError;
+    
+    //Setup command
+    FTFA->FCCOB0 = EraseSector;
+    FTFA->FCCOB1 = (address >> 16) & 0xFF;
+    FTFA->FCCOB2 = (address >> 8) & 0xFF;
+    FTFA->FCCOB3 = address & 0xFF;
+    
+    run_command();
+    
+    return check_error();
+}
+
+__attribute__((section(".ARM.__at_0x79420"))) IAPCode program_flash(int address, char *data, unsigned int length) {
+    #ifdef IAPDEBUG
+    printf("IAP: Programming flash at %x with length %d\r\n", address, length);
+    #endif
+    if (check_align(address))
+        return AlignError;
+        
+    IAPCode eraseCheck = verify_erased(address, length);
+    if (eraseCheck != Success)
+        return eraseCheck;
+    
+    IAPCode progResult;
+#ifdef USE_ProgramPhrase
+    for (int i = 0; i < length; i+=8) {
+        progResult = program_word(address + i, data + i);
+        if (progResult != Success)
+            return progResult;
+    }
+#else
+    for (int i = 0; i < length; i+=4) {
+        progResult = program_word(address + i, data + i);
+        if (progResult != Success)
+            return progResult;
+    }
+#endif    
+    return Success;
+}
+
+__attribute__((section(".ARM.__at_0x79420"))) uint32_t flash_size(void) {
+    uint32_t retval = (SIM->FCFG2 & 0x7F000000u) >> (24-13);
+    if (SIM->FCFG2 & (1<<23))           //Possible second flash bank
+        retval += (SIM->FCFG2 & 0x007F0000u) >> (16-13);
+    return retval;
+}
+
+__attribute__((section(".ARM.__at_0x79420"))) IAPCode program_word(int address, char *data) {
+    #ifdef IAPDEBUG
+    #ifdef USE_ProgramPhrase
+    printf("IAP: Programming word at %x, %d - %d - %d - %d - %d - %d - %d - %d\r\n", address, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
+    #else
+    printf("IAP: Programming word at %x, %d - %d - %d - %d\r\n", address, data[0], data[1], data[2], data[3]);
+    #endif
+    
+    #endif
+    if (check_align(address))
+        return AlignError;
+#ifdef USE_ProgramPhrase
+    FTFA->FCCOB0 = ProgramPhrase;
+    FTFA->FCCOB1 = (address >> 16) & 0xFF;
+    FTFA->FCCOB2 = (address >> 8) & 0xFF;
+    FTFA->FCCOB3 = address & 0xFF;
+    FTFA->FCCOB4 = data[3];
+    FTFA->FCCOB5 = data[2];
+    FTFA->FCCOB6 = data[1];
+    FTFA->FCCOB7 = data[0];
+    FTFA->FCCOB8 = data[7];
+    FTFA->FCCOB9 = data[6];
+    FTFA->FCCOBA = data[5];
+    FTFA->FCCOBB = data[4];    
+#else
+    //Setup command
+    FTFA->FCCOB0 = ProgramLongword;
+    FTFA->FCCOB1 = (address >> 16) & 0xFF;
+    FTFA->FCCOB2 = (address >> 8) & 0xFF;
+    FTFA->FCCOB3 = address & 0xFF;
+    FTFA->FCCOB4 = data[3];
+    FTFA->FCCOB5 = data[2];
+    FTFA->FCCOB6 = data[1];
+    FTFA->FCCOB7 = data[0];
+#endif    
+    run_command();
+    
+    return check_error();
+}
+
+/* Clear possible flags which are set, run command, wait until done */
+__attribute__((section(".ARM.__at_0x79420"))) inline void run_command(void) {
+    //Clear possible old errors, start command, wait until done
+    __disable_irq();            //Disable IRQs, preventing IRQ routines from trying to access flash (thanks to https://mbed.org/users/mjr/)
+    FTFA->FSTAT = FTFA_FSTAT_FPVIOL_MASK | FTFA_FSTAT_ACCERR_MASK | FTFA_FSTAT_RDCOLERR_MASK;
+    FTFA->FSTAT = FTFA_FSTAT_CCIF_MASK;
+    while (!(FTFA->FSTAT & FTFA_FSTAT_CCIF_MASK));
+    __enable_irq();
+}    
+    
+    
+
+/* Check if no flash boundary is violated
+   Returns true on violation */
+__attribute__((section(".ARM.__at_0x79420"))) bool check_boundary(int address, unsigned int length) {
+    int temp = (address+length - 1) / SECTOR_SIZE;
+    address /= SECTOR_SIZE;
+    bool retval = (address != temp);
+    #ifdef IAPDEBUG
+    if (retval)
+        printf("IAP: Boundary violation\r\n");
+    #endif
+    return retval;
+}
+
+/* Check if address is correctly aligned
+   Returns true on violation */
+__attribute__((section(".ARM.__at_0x79420"))) bool check_align(int address) {
+    bool retval = address & 0x03;
+    #ifdef IAPDEBUG
+    if (retval)
+        printf("IAP: Alignment violation\r\n");
+    #endif
+    return retval;
+}
+
+/* Check if an area of flash memory is erased
+   Returns error code or Success (in case of fully erased) */
+__attribute__((section(".ARM.__at_0x79420"))) IAPCode verify_erased(int address, unsigned int length) {
+    #ifdef IAPDEBUG
+    printf("IAP: Verify erased at %x with length %d\r\n", address, length);
+    #endif
+    
+    if (check_align(address))
+        return AlignError;
+    
+    //Setup command
+    FTFA->FCCOB0 = Read1s;
+    FTFA->FCCOB1 = (address >> 16) & 0xFF;
+    FTFA->FCCOB2 = (address >> 8) & 0xFF;
+    FTFA->FCCOB3 = address & 0xFF;
+    FTFA->FCCOB4 = (length >> 10) & 0xFF;
+    FTFA->FCCOB5 = (length >> 2) & 0xFF;
+    FTFA->FCCOB6 = 0;
+    
+    run_command();
+    
+    IAPCode retval = check_error();
+    if (retval == RuntimeError) {
+        #ifdef IAPDEBUG
+        printf("IAP: Flash was not erased\r\n");
+        #endif
+        return EraseError;
+    }
+    return retval;
+        
+}
+
+/* Check if an error occured 
+   Returns error code or Success*/
+__attribute__((section(".ARM.__at_0x79420"))) IAPCode check_error(void) {
+    if (FTFA->FSTAT & FTFA_FSTAT_FPVIOL_MASK) {
+        #ifdef IAPDEBUG
+        printf("IAP: Protection violation\r\n");
+        #endif
+        return ProtectionError;
+    }
+    if (FTFA->FSTAT & FTFA_FSTAT_ACCERR_MASK) {
+        #ifdef IAPDEBUG
+        printf("IAP: Flash access error\r\n");
+        #endif
+        return AccessError;
+    }
+    if (FTFA->FSTAT & FTFA_FSTAT_RDCOLERR_MASK) {
+        #ifdef IAPDEBUG
+        printf("IAP: Collision error\r\n");
+        #endif
+        return CollisionError;
+    }
+    if (FTFA->FSTAT & FTFA_FSTAT_MGSTAT0_MASK) {
+        #ifdef IAPDEBUG
+        printf("IAP: Runtime error\r\n");
+        #endif
+        return RuntimeError;
+    }
+    #ifdef IAPDEBUG
+    printf("IAP: No error reported\r\n");
+    #endif
+    return Success;
+}
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