SDCC model large problem

hi, Currently I am using C8051F345 chip , Silicon IDE (2.72) version and SDCC (2.6). I have problem in declaring global variables more than 171 bytes. The memory model currently used is model large.

I have initialized the controller and the UART . I am just transferring data from the controller in my program. When I increase the array size of a varible more than 171 bytes the code is not working. Is this a problem with SDCC(2.6) version or any problem related with hardware.

I have given the code below , I need some help on this memeory model problem /**********************************************************************************************************************/ //This program is to configure both uarts for variable baud rates /**********************************************************************************************************************/ #include #include "c8051F345.h" #include

xdata unsigned char memChk[171]; // this is the array whose size i want to change

void UART0_ISR (void) interrupt 4 { EA = 0;

if((SCON0 & 0x02) == 2) { SCON0 &= 0xFD; }

if((SCON0 & 0x01) == 1) { SCON0 &= 0xFE;

} EA = 1; }

void Uart0Init() { SCON0 = 0x10; //Receive is Enabled TMOD = 0x20; // Timer 1 is configured in MODE 2 as 8 bit auto reload mode CKCON = 0x01; // The SYSCLK/4 is selected as source for the timer operation TH1 = 0x64; //For the baud rate 9600, at SYSCLK 12MHZ. TR1 = 1; //The timer Run bit is enabled. } void SysInit() { EA = 1; // Enable all interrupts P0SKIP = 0x01; //This is used to skip P0.0 and to use P0.1 as TX1 and P0.2 as RX1 EIE1 = 0x80; // timer 3 enabled EIE2 = 0x02; // UART1 enabled ES0 = 1; //UART0 enabled PCA0MD = 0x00; // watch dog timer disable XBR0 |= 0x01;//UART0 TX0, RX0 routed to Port pins P0.4 and P0.5. XBR1 |= 0x40; //Weak Pull-ups enabled and Crossbar enabled. XBR2 |= 0x01; //UART1 TX1, RX1 routed to Port pins. OSCICN = 0x83; //Internal H-F Oscillator Enabled. and SYSCLK derived from Internal H-F Oscillator divided by 1. OSCICL = 0x1F; //The internal Oscillator is configured to slowest speed which is 12 MHZ in this controller CLKSEL = 0x70; //Internal Oscillator (as determined by the IFCN bits in register OSCICN)

P0MDIN = 0xFF; P0MDOUT = 0xFB; P1MDOUT = 0xFF; P4MDOUT = 0xFF;


void main() { SysInit(); Uart0Init(); P0MDIN = 0xFF; P0MDOUT = 0xFB; P1MDOUT = 0xFF; P4MDOUT = 0xFF;


{ SBUF0 = 'T'; }

Reply to
Loading thread data ...

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.