MPC5xxxのトピックRAM MPC5744P

RAM MPC5744P

金翅大鹏鸟 — Mon, 08 Jun 2020 05:03:28 GMT

Do anyone know how to put the variables into fixed areas on the chip MPC5744P?

Re: RAM MPC5744P

petervlna — Mon, 08 Jun 2020 06:27:59 GMT

Hello,

Could you please explain what you mean by "fixed areas" ?

You can preserve data by using core registers, or EEPROM.

See core reference manual:

regards,

Peter

Re: RAM MPC5744P

金翅大鹏鸟 — Mon, 15 Jun 2020 08:32:53 GMT

I want to put the variables(

INT16 g_iTcMot1SpdReq = 0;
INT16 g_iTcMot1TqReq = 0;
UINT8 g_byTcMot2CtrlMod = 0;
INT16 g_iTcMot2SpdReq = 0;
INT16 g_iTcMot2TqReq = 0;
INT16 g_iTcTotaltqCmd = 0;
UINT8 g_byTcmot1LimtSts = 0;
INT16 g_iTcmot1TqCmd = 0;
INT16 g_iTcmot1TqMax = 0;
INT16 g_iTcmot1TqMin = 0;
UINT8 g_byTcmot2LimtSts = 0;
INT16 g_iTcmot2TqCmd = 0;
INT16 g_iTcmot2TqMax = 0;
INT16 g_iTcmot2TqMin = 0;
BYTE g_byTcuCanLossFlag = 0;
UINT8 g_byTcuErrCod = 0;
UINT8 g_byTcuErrLvl = 0;
UINT8 g_byTcuOperatMode = 0;
BYTE g_byTcuchkokflg1 = 0;
BYTE g_byTcuchkokflg2 = 0;
BYTE g_byTcuchkokflg3 = 0;
BYTE g_byTcuchkokflg4 = 0;
BYTE g_byTcuchkokflg5 = 0;
UINT8 g_byTculivcnt1 = 0;
UINT8 g_byTculivcnt2 = 0;
UINT8 g_byTculivcnt3 = 0;
UINT8 g_byTculivcnt4 = 0;)

at a address start from 0x40000100 to 0x40000400

Re: RAM MPC5744P

金翅大鹏鸟 — Mon, 15 Jun 2020 08:34:40 GMT

I do not know how to set in S32DS

Re: RAM MPC5744P

cholland — Mon, 15 Jun 2020 14:49:48 GMT

There is an example "Run From RAM" HOWTO: Run a routine from RAM in S32 Design Studio

You have to set the memory allocations using the linker and attributes.

The example shows how to run a function from ram, but you should be able to figure out how to set variable in ram.

HTH,