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We would like to know if anyone can help us with the c-code for programing the EEPROM of a 9S12DP256 device. I'm using IAR ICC6812 compiler. The oscillator cristal frekvens is 16 MHz. Thanks in advance.. Peter and Martin Below is my function for programming thats not working. #include "r912dp256.h" program_2byte_in_EEPROM(char a, char b, char adress_c); main(void) { program_2byte_in_EEPROM(0x11,0x22,0x00); program_2byte_in_EEPROM(0x33,0x44,0x02); while(1) { ; } } void program_2byte_in_EEPROM(char a, char b, char adress_c) { char *pointer_c; if ((ECLKDIV & 0x80) != 1) /* Bit EDIVLD(Clock Divider Loaded) set? */ { ECLKDIV = 0x4A; /* 0 1 0 0 1 0 1 0 EEPROM Clock Divider Register | | | | | | | | | | | | | | | \____ EDIV[0] - Clock Divider Bits bit 0 | | | | | | \______ EDIV[1] - Clock Divider Bits bit 1 | | | | | \________ EDIV[2] - Clock Divider Bits bit 2 | | | | \__________ EDIV[3] - Clock Divider Bits bit 3 | | | \____________ EDIV[4] - Clock Divider Bits bit 4 | | \______________ EDIV[5] - Clock Divider Bits bit 5 | \________________ PRDIV8 - Enable Prescaler by 8 \__________________ EDIVLD - Clock Divider Loaded */ } ESTAT &= ~0x20; /* Clear PVIOL(Protection Violation) */ ESTAT &= ~0x10; /* Clear ACCERR(EEPROM Access Error) */ while((ESTAT & 0x80) == 1); /* wait until CBEIF(Command Buffer Empty Interrupt Flag) clear? */ pointer_c = &E2PROM; /* Point to the first adress in EEPROM. (=0x800) */ pointer_c += adress_c; /* Add the adress. */ *pointer_c = a; pointer_c++; *pointer_c = b; ECMD = 0x20; /* Program a word (2 byte) */ ESTAT &= ~0x80; /* Clear CBEIF(Command Buffer Empty Interrupt Flag) */ while((ESTAT & 0x80) == 1); /* wait until CBEIF(Command Buffer Empty Interrupt Flag) clear? */ while((ESTAT & 0x40) == 0); /* wait until CCIF(Command Complete Interrupt Flag) set? */ } |
Programming EEPROM
Started by ●November 28, 2002
