CCS/MSP432P401R: Problem with variables space

Andrea Cimetti

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Hello,

I have this problem, a buffer (with adress 0x20000200) with 128 spaces and it goes and inglobe a struct which adress is 0x20000280, now in my program the struct is a must and I need it to run my hardware but when I reset the buffer, it resets my structur too. I already tryed to optimize the global variables, but it doesn't change. Do you have a suggestion?

Thanks

over 8 years ago

0 Bob Landers over 8 years ago

TI__Expert 8510 points

Andrea,
Can you describe or send code for exactly what you are doing when you "reset the the buffer?".
-Bob L

0 Andrea Cimetti over 8 years ago in reply to Bob Landers

Prodigy 110 points

The code is realy massive, but ok, I link what I think is essential.

typedef struct  {
	EPD_SIZE_t	  	Size_ID;
	uint8_t   		channel_select[8]; /**< the SPI register data of Channel Select */
    union{
	uint8_t   		voltage_level;     /**< the SPI register data of Voltage Level */
    uint8_t   		Dummy_line_offset;     /**<dummy line offset length*/
    };
	uint16_t  		horizontal_size;   /**< the bytes of width of EPD */
	uint16_t  		vertical_size;     /**< the bytes of height of EPD */
	uint8_t   		data_line_size;    /**< Data + Scan + Dummy bytes */
	uint16_t  		frame_time_offset; /**< the rest of frame time in a stage */
	uint16_t  		stage_time;        /**< defined stage time */
} COG_parameters_t;        //Struct of the variable at adress 0x2000280

typedef union {
	union {
        //eTC_G2_Aurora_Mb
        struct eTC_G2Mb_144_line_data_t eTC_G2Mb_144_line_data; /**< line data structure of 1.44" EPD */
		struct eTC_G2Mb_200_line_data_t eTC_G2Mb_200_line_data; /**< line data structure of 2" EPD */
		struct eTC_G2Mb_270_line_data_t eTC_G2Mb_270_line_data; /**< line data structure of 2.7" EPD */
		struct eTC_G2Mb_190_line_data_t eTC_G2Mb_190_line_data; /**< line data structure of 1.9" EPD */
		struct eTC_G2Mb_260_line_data_t eTC_G2Mb_260_line_data; /**< line data structure of 2.6" EPD */

    } line_data_by_size; /**< the line data of specific EPD size */
	uint8_t uint8[LINE_BUFFER_DATA_SIZE]; /**< the maximum line buffer data size as length */ //LINE_BUFFER_DATA_SIZE=128
} eTC_G2Mb_line_data_t;     //Struct of the variable at adress 0x2000200

uint8_t eTC_G2Mb_initialize_driver (OperationMode_t operationmode) {
		uint16_t i;
	// Empty the Line buffer
	for (i = 0; i <= LINE_BUFFER_DATA_SIZE; i ++) {             //THE ERROR IS HERE LINE_BUFFER_DATA_SIZE = 128
		COG_Line.uint8[i] = 0x00;                           //COG_Line is of type eTC_G2Mb_line_data_t
	}
	// Determine the EPD size for driving COG
	eTC_G2Mb_RegAssign_Select();
	
	i = 0;

	while (EPD_IsBusy()) {
		if((i++) >= 0x0FFF) return ERROR_BUSY;
	}

	//Check COG ID
	if((EPD_Gx_spi_rid() & 0x0F) !=0x02) return ERROR_COG_ID;
	//Disable OE
	EPD_Gx_spi_send_byte(0x02,0x40);
	//Check Breakage
	if((EPD_Gx_spi_r(0x0F,0x00) & 0x80) != 0x80) return ERROR_BREAKAGE;
	//Power Saving Mode
 	EPD_Gx_spi_send_byte(0x0B, 0x02);
	//Channel Select
	EPD_Gx_spi_send (0x01, (uint8_t *)&cur_cog_param->channel_select, 8);
	//High Power Mode Osc Setting
	EPD_Gx_spi_send_byte(0x07,0xD1);
	//Power Setting
	EPD_Gx_spi_send_byte(0x08,0x02);
	//Set Vcom level
	EPD_Gx_spi_send_byte(0x09,0xC2);
	//Power Setting
	EPD_Gx_spi_send_byte(0x04,0x03);
	//Driver latch on
	EPD_Gx_spi_send_byte(0x03,0x01);
	//Driver latch off
	EPD_Gx_spi_send_byte(0x03,0x00);
	EPD_delay_ms(5);
	//Chargepump Start
	i=0;
	do {
		//Start chargepump positive V
		//VGH & VDH on
		EPD_Gx_spi_send_byte(0x05,0x01);
		EPD_delay_ms(240);
		//Start chargepump neg voltage
		//VGL & VDL on
		EPD_Gx_spi_send_byte(0x05,0x03);
		EPD_delay_ms(40);
		//Set chargepump
		//Vcom_Driver to ON
		//Vcom_Driver on
		EPD_Gx_spi_send_byte(0x05,0x0F);
		EPD_delay_ms(40);
		//Check DC/DC
		if((EPD_Gx_spi_r(0x0F,0x00) & 0x40) == 0x40)
		{
			//Output enable to disable
			EPD_Gx_spi_send_byte(0x02,0x06);
			break;
		}
	}while((i++) != 4);

	if(i>=4) return ERROR_CHARGEPUMP;
	else return RES_OK;
}