Hi guys, i'm looking for a code to see the temperature capture from an LM76 in a ST7032 display... I'm newbie and now i know only how to write something on the ST032 ahah... But i definitely don't know how interface it with the LM76. I'm working on C8051F020 with a chip (the drive where the LM76 and ST7032 are placed) link to the PORT 0
This is my starting code:
#include "C8051F020.H" //Device definitions #define DISPLAY_ADDR 0x07C //Display address #define LINE1 0x000 //Line 1 address #define LINE2 0x040 //Line 2 address //Master Trasmitter #define SMB_START 0x08 #define SMB_ADDR_ACK 0x018 #define SMB_DATA_ACK 0x028
I manage the display with this functions:
void init_display () { unsigned char dinit[] = {0x38, 0x39, 0x14, 0x74, 0x54, 0x6F, 0x0F, 0x01}; screen_led = 1; i2c_out(DISPLAY_ADDR, dinit, sizeof(dinit)); } void display_move_to (unsigned char addr) { unsigned char comm[] = {0x080, 0x000}; comm[1] = addr | 0x080; i2c_out(DISPLAY_ADDR, comm, 2); }
And this is the other functions:
sbit screen_led = P0^6; sbit green_led = P1^6; void init() { WDTCN = 0x0DE; //le solite cose WDTCN = 0x0AD; OSCICN &= 0x014; EA = 1; /******************* i2c initalization *******************/ XBR0 = 0x005; XBR1 = 0x000; XBR2 = 0x040; SMB0CN = 0x044; SMB0CR = 0x0B0; SCON0 |= 0x010; EIE1 |= 2; P1MDOUT |= 0x040; P0MDOUT |= 0x040; SI = 0; } char* i2c_data_out; char i2c_addr_out; unsigned char i2c_length_out; unsigned char i2c_index_out; void i2c_out(char addr, char* _data, unsigned char length) { while (i2c_index_out < i2c_length_out); STO = 1; STO = 0; i2c_length_out = length; i2c_index_out = 0; i2c_data_out = _data; i2c_addr_out = addr; STA = 1; //starta } void i2c_status_interrupt () interrupt 7 { switch(SMB0STA) { case SMB_START: STA = 0; STO = 0; SMB0DAT = (i2c_addr_out & 0x0FE); SI = 0; break; case SMB_ADDR_ACK: SMB0DAT = i2c_data_out[0]; SI = 0; break; case SMB_DATA_ACK: i2c_index_out = i2c_index_out + 1; if (i2c_index_out < i2c_length_out) { SMB0DAT = i2c_data_out[i2c_index_out]; } else { STO = 1; STA = 0; } SI = 0; break; default: break; } }
And finally, the main!:
void main() { init(); green_led = 0; init_display(); i2c_out(DISPLAY_ADDR, "@LINE1", 6); display_move_to(LINE2); i2c_out(DISPLAY_ADDR, "@LINE2", 6); while(1); }
With this code i can write LINE1 and LINE2 in both display line
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This is the code i think can work to initialize LM76:
#define LM76_ADDR 0x48 //LM76 address //Master Receiver #define SMB_START_SENS 0x08 #define SMB_ADDR_ACK_SENS 0x40 #define SMB_DATA_ACK_SENS 0x50
But now i don't know how to proceed...
Any suggests? Thanks :D
Ok, thank you!