Other Parts Discussed in Thread: USB-TO-GPIO2, UCD3138A
Tool/software:
I have been able to program block 0 with one application and Block2 with another.
I can use the PMBUS to switch between applications.
However, I need to be able to switch between applications under program mode in my firmware.
I have found the function that loads the memory control registers: attached
After calling the function, how do I get the program to start at the new block number? Seems there is one more step I need to do after these functions.
static void switch_active_program_to_pflash01(void)
{
//------------------------------------------------------------------------------------
// assumed entry state: program being executed is stored in pflash blocks 2 and 3
// backup copy is in blocks 0 and 1
// UPON ENTRY
// block 0: address = 0x10000
// MFBALR1: 0x0060 MFBAHR1: 0x10000
// block 1: address = 0x18000
// MFBALR17: 0x8060 MFBAHR17: 0x10000
// block 2: address = 0x00000
// MFBALR18: 0x0060 MFBAHR18: 0x00000
// block 3: address = 0x08000
// MFBALR19: 0x8060 MFBAHR19: 0x00000
//------------------------------------------------------------------------------------
// temporarily set size of blocks 2 and 3 to 0kB by setting MFBALRx.BLOCK_SIZE = 0 (x = 18,19)
// setting MFBALRx.BLOCK_SIZE = 0 disables these blocks
// this is necessary as you cannot map two blocks to the same address
// doing so will result in a data abort exception
DecRegs.MFBALR18.all = 0x0000; // block 2, size = 0 KBytes
DecRegs.MFBALR19.all = 0x8000; // block 3, size = 0 KBytes
DecRegs.MFBAHR1.all = 0x0000; // map block 0 to address 0x00000 (MFBAHL1 = 0x0060)
DecRegs.MFBAHR17.all = 0x0000; // map block 1 to address 0x08000 (MFBAHL17 = 0x8060)
DecRegs.MFBAHR18.all = 0x0001; // map block 2 to address 0x10000 (MFBAHL18 = 0x0000)
DecRegs.MFBAHR19.all = 0x0001; // map block 3 to address 0x18000 (MFBAHL19 = 0x8000)
DecRegs.MFBALR18.all = 0x0060; // block 2, size = 32Kbytes
DecRegs.MFBALR19.all = 0x8060; // block 3, size = 32Kbytes
}
static void switch_active_program_to_pflash23(void)
{
//------------------------------------------------------------------------------------
// assumed entry state: program being executed is stored in pflash blocks 0 and 1
// backup copy is in blocks 2 and 3
// UPON ENTRY
// block 0: address = 0x00000
// MFBALR1: 0x0060 MFBAHR1: 0x0000
// block 1: address = 0x08000
// MFBALR17: 0x8060 MFBAHR17: 0x0000
// block 2: address = 0x10000
// MFBALR18: 0x0060 MFBAHR18: 0x1000
// block 3: address = 0x18000
// MFBALR19: 0x0080 MFBAHR19: 0x1000
//------------------------------------------------------------------------------------
// temporarily set size of blocks 0 and 1 to 0kB by setting MFBALRx.BLOCK_SIZE = 0 (x = 1, 17)
// setting MFBALRx.BLOCK_SIZE = 0 disables these blocks
// this is necessary as you cannot map two blocks to the same address
// doing so will result in a data abort exception
DecRegs.MFBALR1.all = 0x0000; // block 0, size = 0 KBytes
DecRegs.MFBALR17.all = 0x8000; // block 1, size = 0 KBytes
DecRegs.MFBAHR18.all = 0x0000; // map block 2 to address 0x00000 (MFBAHL18 = 0x0060)
DecRegs.MFBAHR19.all = 0x0000; // map block 3 to address 0x08000 (MFBAHL19 = 0x8060)
DecRegs.MFBAHR1.all = 0x0001; // map block 0 to address 0x10000 (MFBAHL1 = 0x0000)
DecRegs.MFBAHR17.all = 0x0001; // map block 1 to address 0x18000 (MFBAHL17 = 0x8000)
DecRegs.MFBALR1.all = 0x0060; // block 0, size = 32Kbytes
DecRegs.MFBALR17.all = 0x8060; // block 1, size = 32Kbytes
}
