How to transfer the data between the GPIO port to internal memory SRAM in LPC4370 without using the DMA technique such that is there is any single Embedded C instruction to transfer the any one of the GPIO port data into the internal SRAM specified addres

[sujayp]

How to transfer the data between the GPIO port to internal memory SRAM in LPC4370 without using the DMA technique such that is there is any single Embedded C instruction to transfer the any one of the GPIO port data into the internal SRAM specified address in LPC4370 ?

will you please suggest me, how to write the same

[jeremyzhou]

Hi sujay p,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.

To achieve the goal, firstly, you should define a array which locate at the specific address in the RAM, then the array can be wrote by the value of the GPIO port via C language.
Have a great day,
Ping

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[sujayp]

Hi,

Is the code something which is similar to the mentioned below such that in order to save the GPIO data  at the internal memory location :-

int main()

{

/* initial instruction is important to use the shadow area */

uint32_t *var  __attribute__((at(0x10080000)));

LPC_CREG->M4MEMMAP = 0x1C000000;

LPC_CREG->M0SUBMEMMAP = 0x1C000000;

LPC_CCU1->CLK_M4_GPIO_CFG = CCU_CLK_CFG_AUTO | CCU_CLK_CFG_RUN ;

while (!(LPC_CCU1->CLK_M4_GPIO_STAT & CCU_CLK_STAT_RUN));           

/*  CLK_M4_GPIO_STAT can access as a read value and cant be written and the value  which  would depends on the CLK_M4_GPIO_CFG Configuration  Register  */

/* To configure The GPIO port as the write pin or output Pin or output port in word format or Byte format  or Bit format */

/*  To format the GPIO single pin in the  output bit  */

LPC_SCU->SFSPD_12 = 4;

/* The 4 value is the mode Value for the function 4 such that GPIO PORT GPIO6[26] */

LPC_GPIO_PORT->DIR[6] |= 1 << 6;

/* The value is the Directory value set the GPIO6[26] as the output bit Pin */

LPC_GPIO_PORT->SET[6] = 1 << 6 ;

while(1)

{

if(LPC_GPIO_PORT->PIN[0] && LPC_GPIO_PORT->PIN[1] == 0xFFFFFFFF)

{

*var = LPC_GPIO_PORT->PIN[6];  //  Read the Port Number 6 and save it in the memory location 0x10080000

var++;                                             // Increment the Address

}

}

}

Regards

Sujay

[sujayp]

Hi,

Is the code something which is similar to the mentioned below such that in order to save the GPIO data  at the internal memory location :-

Actually in the previous code set GPIO6 [26] is set as a write pin ; I think it wont work

int main()

{

/* initial instruction is important to use the shadow area */

uint32_t *var  __attribute__((at(0x10080000)));

LPC_CREG->M4MEMMAP = 0x1C000000;

LPC_CREG->M0SUBMEMMAP = 0x1C000000;

LPC_CCU1->CLK_M4_GPIO_CFG = CCU_CLK_CFG_AUTO | CCU_CLK_CFG_RUN ;

while (!(LPC_CCU1->CLK_M4_GPIO_STAT & CCU_CLK_STAT_RUN));           

/*  CLK_M4_GPIO_STAT can access as a read value and cant be written and the value  which  would depends on the CLK_M4_GPIO_CFG Configuration  Register  */

*var = LPC_GPIO_PORT->PIN[6];  //  Read the Port Number 6 and save it in the memory location 0x10080000

var++;                       // increment the Address

}

Regards

Sujay

[vxs187]

Were you able to read pins? I am just trying to give a DC supply but am not able to get any proper output, it always gives me 0, meaning the input is always low, even when I am giving a DC of 3.3V. Do I have to supply a greater voltage? I am totally left clueless. I am using GPIO1_0.