treitmey
Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA
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| verification of typemod and fram |
 Posted: Fri Feb 24, 2006 3:10 pm |
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Could someone with fram on there system check this. It seems when I use typemod and local (to main) vars the system works. When I change the to globals, the last entry of the list presents an incorrect value
| Code: | #include <18F452.H>
#case
#use delay(clock=40000000)
#fuses h4,nowdt,noprotect,nolvp
#use rs232(baud=19200,xmit=PIN_C0,invert,stream=DEBUG,disable_ints) // stderr(same as debug)
#zero_ram
int8 ERRORS;
#define FRAM_CHIPS 4
//#include "FM24C256.C"
#include <74595.C>
//----------prototypes--------
void init_fram();
multi_read_fram(int32 address,int8 *data,int8 size);
multi_write_fram(int32 address,int8 *data,int8 size);
//----//
typemod <,multi_read_fram, multi_write_fram,0,131071> fram;
//place int8 fram here for global variable
//======================= MAIN ============================//
void main(void)
{
int8 fram f_1,fram f_2,fram f_3,fram f_4,fram f_5;
int16 cnt;
setup_adc_ports(NO_ANALOGS);
set_tris_a(0);set_tris_b(0);set_tris_c(0);set_tris_d(0);set_tris_e(0);
output_low(PIN_C5);//tx enable
output_high(PIN_C6);
fprintf(DEBUG,"Start!\n\r");
init_fram();
f_1=1;
f_2=2;
f_3=3;
f_4=4;
f_5=5;
for(cnt=0;cnt<12;cnt++);
fprintf(DEBUG,"%u %u %u %u %u\n\r",f_1,f_2,f_3,f_4,f_5);
fprintf(DEBUG,"DONE !\n\r");
while(1)
{
}
}
#ifndef FRAM_SDA
#define FRAM_SDA PIN_C4
#define FRAM_SCL PIN_C3
#endif
#use I2C(MASTER,SDA=FRAM_SDA,SCL=FRAM_SCL,FORCE_HW,FAST=1000000,RESTART_WDT)
#define FRAM_ADDRESS int32
#define FRAM_SIZE 32768
#ifndef FRAM_CHIPS
#define FRAM_CHIPS 1
#endif
#define FRAM_MAX_ADDRESS (FRAM_SIZE*FRAM_CHIPS)-1 //4 chips 0,1,2,3
#define hi(x) (*(&x+1)) //data held at addr of x + 1
#define lo(x) (*(&x)) //data held at addr of x
//======================init_fram===========================//
void init_fram(){
output_float(FRAM_SCL);
output_float(FRAM_SDA);
}
//======================multi_read_fram===========================//
//start addr 0,32768,65536,98304,131072,163840,196608,229376
multi_read_fram(int32 address,int8 *data,int8 size){
int8 start_size;
//fprintf(DEBUG,"-mr-");
start_size=size;
for(;size;data++,size--,address++)
{
if(address>FRAM_MAX_ADDRESS){
bit_set(ERRORS,4);
//fprintf(DEBUG,"ERROR address too big!\n\r%lu\n\r",address);
}
if(address%FRAM_SIZE==0 || size==start_size){
//fprintf(DEBUG,"sending slave address=%lu\n\r",address);
i2c_start();
i2c_write((0xA0|(int8)(address>>14))&0xFE);//&0xFE forces to write
i2c_write(hi(address));
i2c_write(lo(address));
i2c_start();
i2c_write((0xA0|(int8)(address>>14))|1);//|1 forces to read
}
if((address+1)%FRAM_SIZE && size!=1)
{
*data=i2c_read(1);//The ack will put next data on bus
//fprintf(DEBUG,"read with ack %lu=%u\n\r",address,*data);
}
else
{
*data=i2c_read(0);//No ack on last read of chip
//fprintf(DEBUG,"read without ack %lu=%u\n\r",address,*data);
//fprintf(DEBUG,"I2c stop\n\r");
i2c_stop();
}
}
//fprintf(DEBUG,"-mr- done!\n\r");
//return(TRUE);
}
//======================multi_write_fram===========================//
multi_write_fram(int32 address,int8 *data,int8 size)
{
int8 start_size;
start_size=size;
//fprintf(DEBUG,"-mw- %lu %lu\n\r",address,size);
for(;size;data++,size--,address++){
if(address>FRAM_MAX_ADDRESS){
bit_set(ERRORS,4);
//fprintf(DEBUG,"ERROR address too big!\n\r%lu\n\r",address);
}
if(address%FRAM_SIZE==0 || size==start_size){
//fprintf(DEBUG,"I2c stop\n\r");
i2c_stop();
//fprintf(DEBUG,"I2c start\n\r");
i2c_start();
//fprintf(DEBUG,"sending slave address=%lu\n\r",address);
i2c_write((0xA0|(int8)(address>>14))&0xFE);
i2c_write(hi(address));
i2c_write(lo(address));
}
i2c_write(*data);
//fprintf(DEBUG,"wrote %u\n\r",*data);
}
i2c_stop();
//fprintf(DEBUG,"dmw\n\r");
//return(TRUE);
}
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