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SWI2C for PAT9125 simplified/optimized

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This commit is contained in:
Robert Pelnar 2018-07-12 17:55:38 +02:00
parent f24c71d5a9
commit 410e911364
8 changed files with 224 additions and 234 deletions
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8
Firmware/config.h
View file

@ -8,6 +8,14 @@
#define ADC_OVRSAMPL 16 //oversampling multiplier
#define ADC_CALLBACK adc_ready //callback function ()
//SWI2C configuration
#define SWI2C
//#define SWI2C_SDA 20 //SDA on P3
//#define SWI2C_SCL 21 //SCL on P3
#define SWI2C_A8
#define SWI2C_DEL 20 //2us clock delay
#define SWI2C_TMO 2048 //2048 cycles timeout
//SM4 configuration
#define SM4_DEFDELAY 500 //default step delay [us]

2
Firmware/pat9125.cpp
View file

@ -80,7 +80,7 @@ int pat9125_init()
swspi_init();
#endif //PAT9125_SWSPI
#ifdef PAT9125_SWI2C
swi2c_init(PAT9125_SWI2C_SDA, PAT9125_SWI2C_SCL, PAT9125_SWI2C_CFG);
swi2c_init();
#endif //PAT9125_SWI2C
#ifdef PAT9125_HWI2C
Wire.begin();

9
Firmware/pins_Einsy_1_0.h
View file

@ -17,15 +17,12 @@
#define W25X20CL // external 256kB flash
#define SWI2C // enable software i2c
#define SWI2C_A8 // 8bit address functions
#define SWI2C_SDA 20 //SDA on P3
#define SWI2C_SCL 21 //SCL on P3
#define PAT9125_SWI2C
#define PAT9125_SWI2C_SDA 20 //SDA on P3
#define PAT9125_SWI2C_SCL 21 //SCL on P3
#define PAT9125_SWI2C_CFG 0xb1 //2us clock delay, 2048 cycles timeout
//#define PAT9125_HWI2C
#define X_TMC2130_CS 41
#define X_TMC2130_DIAG 64 // !!! changed from 40 (EINY03)

8
Firmware/pins_Rambo_1_0.h
View file

@ -11,15 +11,11 @@
#define PINDA_THERMISTOR
#define SWI2C // enable software i2c
#define SWI2C_A8 // 8bit address functions
#define SWI2C_SDA 20 //SDA on P3
#define SWI2C_SCL 84 //PH2 on P3, sensor cable must be rewired
#define PAT9125_SWI2C
#define PAT9125_SWI2C_SDA 20 //SDA on P3
#define PAT9125_SWI2C_SCL 84 //PH2 on P3, sensor cable must be rewired
#define PAT9125_SWI2C_CFG 0xb1 //2us clock delay, 2048 cycles timeout
//#define PAT9125_HWI2C
#define X_STEP_PIN 37
#define X_DIR_PIN 48

8
Firmware/pins_Rambo_1_3.h
View file

@ -11,15 +11,11 @@
#define PINDA_THERMISTOR
#define SWI2C // enable software i2c
#define SWI2C_A8 // 8bit address functions
#define SWI2C_SDA 20 //SDA on P3
#define SWI2C_SCL 21 //SCL on P3
#define PAT9125_SWI2C
#define PAT9125_SWI2C_SDA 20 //SDA on P3
#define PAT9125_SWI2C_SCL 21 //SCL on P3
#define PAT9125_SWI2C_CFG 0xb1 //2us clock delay, 2048 cycles timeout
//#define PAT9125_HWI2C
#define X_STEP_PIN 37
#define X_DIR_PIN 48

189
Firmware/swi2c.c Normal file
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@ -0,0 +1,189 @@
//swi2c.c
#include "swi2c.h"
#include <avr/io.h>
#include <avr/delay.h>
#include <avr/pgmspace.h>
#include "Configuration_prusa.h"
#include "pins.h"
#include "io_atmega2560.h"
#define SWI2C_RMSK 0x01 //read mask (bit0 = 1)
#define SWI2C_WMSK 0x00 //write mask (bit0 = 0)
#define SWI2C_ASHF 0x01 //address shift (<< 1)
#define SWI2C_DMSK 0x7f //device address mask
void __delay(void)
{
_delay_us(1.5);
}
void swi2c_init(void)
{
PIN_OUT(SWI2C_SDA);
PIN_OUT(SWI2C_SCL);
PIN_SET(SWI2C_SDA);
PIN_SET(SWI2C_SCL);
uint8_t i; for (i = 0; i < 100; i++)
__delay();
}
void swi2c_start(void)
{
PIN_CLR(SWI2C_SDA);
__delay();
PIN_CLR(SWI2C_SCL);
__delay();
}
void swi2c_stop(void)
{
PIN_SET(SWI2C_SCL);
__delay();
PIN_SET(SWI2C_SDA);
__delay();
}
void swi2c_ack(void)
{
PIN_CLR(SWI2C_SDA);
__delay();
PIN_SET(SWI2C_SCL);
__delay();
PIN_CLR(SWI2C_SCL);
__delay();
}
uint8_t swi2c_wait_ack()
{
PIN_INP(SWI2C_SDA);
__delay();
// PIN_SET(SWI2C_SDA);
__delay();
PIN_SET(SWI2C_SCL);
// __delay();
uint8_t ack = 0;
uint16_t ackto = SWI2C_TMO;
while (!(ack = (PIN_GET(SWI2C_SDA)?0:1)) && ackto--) __delay();
PIN_CLR(SWI2C_SCL);
__delay();
PIN_OUT(SWI2C_SDA);
__delay();
PIN_CLR(SWI2C_SDA);
__delay();
return ack;
}
uint8_t swi2c_read(void)
{
PIN_SET(SWI2C_SDA);
__delay();
PIN_INP(SWI2C_SDA);
uint8_t data = 0;
int8_t bit; for (bit = 7; bit >= 0; bit--)
{
PIN_SET(SWI2C_SCL);
__delay();
data |= (PIN_GET(SWI2C_SDA)?1:0) << bit;
PIN_CLR(SWI2C_SCL);
__delay();
}
PIN_OUT(SWI2C_SDA);
return data;
}
void swi2c_write(uint8_t data)
{
int8_t bit; for (bit = 7; bit >= 0; bit--)
{
if (data & (1 << bit)) PIN_SET(SWI2C_SDA);
else PIN_CLR(SWI2C_SDA);
__delay();
PIN_SET(SWI2C_SCL);
__delay();
PIN_CLR(SWI2C_SCL);
__delay();
}
}
uint8_t swi2c_check(uint8_t dev_addr)
{
swi2c_start();
swi2c_write((dev_addr & SWI2C_DMSK) << SWI2C_ASHF);
if (!swi2c_wait_ack()) { swi2c_stop(); return 0; }
swi2c_stop();
return 1;
}
#ifdef SWI2C_A8 //8bit address
uint8_t swi2c_readByte_A8(uint8_t dev_addr, uint8_t addr, uint8_t* pbyte)
{
swi2c_start();
swi2c_write(SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) { swi2c_stop(); return 0; }
swi2c_write(addr & 0xff);
if (!swi2c_wait_ack()) return 0;
swi2c_stop();
swi2c_start();
swi2c_write(SWI2C_RMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) return 0;
uint8_t byte = swi2c_read();
swi2c_stop();
if (pbyte) *pbyte = byte;
return 1;
}
uint8_t swi2c_writeByte_A8(uint8_t dev_addr, uint8_t addr, uint8_t* pbyte)
{
swi2c_start();
swi2c_write(SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) { swi2c_stop(); return 0; }
swi2c_write(addr & 0xff);
if (!swi2c_wait_ack()) return 0;
swi2c_write(*pbyte);
if (!swi2c_wait_ack()) return 0;
swi2c_stop();
return 1;
}
#endif //SWI2C_A8
#ifdef SWI2C_A16 //16bit address
uint8_t swi2c_readByte_A16(uint8_t dev_addr, unsigned short addr, uint8_t* pbyte)
{
swi2c_start();
swi2c_write(SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) { swi2c_stop(); return 0; }
swi2c_write(addr >> 8);
if (!swi2c_wait_ack()) return 0;
swi2c_write(addr & 0xff);
if (!swi2c_wait_ack()) return 0;
swi2c_stop();
swi2c_start();
swi2c_write(SWI2C_RMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) return 0;
uint8_t byte = swi2c_read();
swi2c_stop();
if (pbyte) *pbyte = byte;
return 1;
}
uint8_t swi2c_writeByte_A16(uint8_t dev_addr, unsigned short addr, uint8_t* pbyte)
{
swi2c_start();
swi2c_write(SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack()) { swi2c_stop(); return 0; }
swi2c_write(addr >> 8);
if (!swi2c_wait_ack()) return 0;
swi2c_write(addr & 0xff);
if (!swi2c_wait_ack()) return 0;
swi2c_write(*pbyte);
if (!swi2c_wait_ack()) return 0;
swi2c_stop();
return 1;
}
#endif //SWI2C_A16

209
Firmware/swi2c.cpp
View file

@ -1,209 +0,0 @@
#include "uni_avr_rpi.h"
#ifdef SWI2C
#include "swi2c.h"
#ifdef __AVR
unsigned char swi2c_sda = 20; // SDA pin
unsigned char swi2c_scl = 21; // SCL pin
#endif //__AVR
#ifdef __RPI
unsigned char swi2c_sda = 2; // SDA pin
unsigned char swi2c_scl = 3; // SCL pin
#endif //__RPI
unsigned char swi2c_cfg = 0xb1; // config
// bit0..3 = clock delay factor = 1 << 1 = 2 [us]
// bit4..7 = ack timeout factor = 1 << 11 = 2048 [cycles]
#define SWI2C_SDA swi2c_sda
#define SWI2C_SCL swi2c_scl
#define SWI2C_RMSK 0x01 //read mask (bit0 = 1)
#define SWI2C_WMSK 0x00 //write mask (bit0 = 0)
#define SWI2C_ASHF 0x01 //address shift (<< 1)
#define SWI2C_DMSK 0x7f //device address mask
void swi2c_init(unsigned char sda, unsigned char scl, unsigned char cfg)
{
swi2c_sda = sda;
swi2c_scl = scl;
swi2c_cfg = cfg;
GPIO_OUT(SWI2C_SDA);
GPIO_OUT(SWI2C_SCL);
GPIO_SET(SWI2C_SDA);
GPIO_SET(SWI2C_SCL);
DELAY(1000);
}
void swi2c_start(int delay)
{
GPIO_CLR(SWI2C_SDA);
DELAY(delay);
GPIO_CLR(SWI2C_SCL);
DELAY(delay);
}
void swi2c_stop(int delay)
{
GPIO_SET(SWI2C_SCL);
DELAY(delay);
GPIO_SET(SWI2C_SDA);
DELAY(delay);
}
void swi2c_ack(int delay)
{
GPIO_CLR(SWI2C_SDA);
DELAY(delay);
GPIO_SET(SWI2C_SCL);
DELAY(delay);
GPIO_CLR(SWI2C_SCL);
DELAY(delay);
}
int swi2c_wait_ack(int delay, int ackto)
{
GPIO_INP(SWI2C_SDA);
DELAY(delay);
// GPIO_SET(SWI2C_SDA);
DELAY(delay);
GPIO_SET(SWI2C_SCL);
// DELAY(delay);
int ack = 0;
while (!(ack = !GPIO_GET(SWI2C_SDA)) && ackto--) DELAY(delay);
GPIO_CLR(SWI2C_SCL);
DELAY(delay);
GPIO_OUT(SWI2C_SDA);
DELAY(delay);
GPIO_CLR(SWI2C_SDA);
DELAY(delay);
return ack;
}
unsigned char swi2c_read(int delay)
{
GPIO_SET(SWI2C_SDA);
DELAY(delay);
GPIO_INP(SWI2C_SDA);
unsigned char data = 0;
int bit; for (bit = 7; bit >= 0; bit--)
{
GPIO_SET(SWI2C_SCL);
DELAY(delay);
data |= GPIO_GET(SWI2C_SDA) << bit;
GPIO_CLR(SWI2C_SCL);
DELAY(delay);
}
GPIO_OUT(SWI2C_SDA);
return data;
}
void swi2c_write(int delay, unsigned char data)
{
int bit; for (bit = 7; bit >= 0; bit--)
{
if (data & (1 << bit)) GPIO_SET(SWI2C_SDA);
else GPIO_CLR(SWI2C_SDA);
DELAY(delay);
GPIO_SET(SWI2C_SCL);
DELAY(delay);
GPIO_CLR(SWI2C_SCL);
DELAY(delay);
}
}
int swi2c_check(unsigned char dev_addr)
{
int delay = 1 << (swi2c_cfg & 0xf);
int tmout = 1 << (swi2c_cfg >> 4);
swi2c_start(delay);
swi2c_write(delay, (dev_addr & SWI2C_DMSK) << SWI2C_ASHF);
if (!swi2c_wait_ack(delay, tmout)) { swi2c_stop(delay); return 0; }
swi2c_stop(delay);
return 1;
}
#ifdef SWI2C_A8 //8bit address
int swi2c_readByte_A8(unsigned char dev_addr, unsigned char addr, unsigned char* pbyte)
{
int delay = 1 << (swi2c_cfg & 0xf);
int tmout = 1 << (swi2c_cfg >> 4);
swi2c_start(delay);
swi2c_write(delay, SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) { swi2c_stop(delay); return 0; }
swi2c_write(delay, addr & 0xff);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_stop(delay);
swi2c_start(delay);
swi2c_write(delay, SWI2C_RMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) return 0;
unsigned char byte = swi2c_read(delay);
swi2c_stop(delay);
if (pbyte) *pbyte = byte;
return 1;
}
int swi2c_writeByte_A8(unsigned char dev_addr, unsigned char addr, unsigned char* pbyte)
{
int delay = 1 << (swi2c_cfg & 0xf);
int tmout = 1 << (swi2c_cfg >> 4);
swi2c_start(delay);
swi2c_write(delay, SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) { swi2c_stop(delay); return 0; }
swi2c_write(delay, addr & 0xff);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_write(delay, *pbyte);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_stop(delay);
return 1;
}
#endif //SWI2C_A8
#ifdef SWI2C_A16 //16bit address
int swi2c_readByte_A16(unsigned char dev_addr, unsigned short addr, unsigned char* pbyte)
{
int delay = 1 << (swi2c_cfg & 0xf);
int tmout = 1 << (swi2c_cfg >> 4);
swi2c_start(delay);
swi2c_write(delay, SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) { swi2c_stop(delay); return 0; }
swi2c_write(delay, addr >> 8);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_write(delay, addr & 0xff);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_stop(delay);
swi2c_start(delay);
swi2c_write(delay, SWI2C_RMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) return 0;
unsigned char byte = swi2c_read(delay);
swi2c_stop(delay);
if (pbyte) *pbyte = byte;
return 1;
}
int swi2c_writeByte_A16(unsigned char dev_addr, unsigned short addr, unsigned char* pbyte)
{
int delay = 1 << (swi2c_cfg & 0xf);
int tmout = 1 << (swi2c_cfg >> 4);
swi2c_start(delay);
swi2c_write(delay, SWI2C_WMSK | ((dev_addr & SWI2C_DMSK) << SWI2C_ASHF));
if (!swi2c_wait_ack(delay, tmout)) { swi2c_stop(delay); return 0; }
swi2c_write(delay, addr >> 8);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_write(delay, addr & 0xff);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_write(delay, *pbyte);
if (!swi2c_wait_ack(delay, tmout)) return 0;
swi2c_stop(delay);
return 1;
}
#endif //SWI2C_A16
#endif //SWI2C

25
Firmware/swi2c.h
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@ -1,22 +1,35 @@
//swi2c.h
#ifndef SWI2C_H
#define SWI2C_H
#include <inttypes.h>
#include "config.h"
#if defined(__cplusplus)
extern "C" {
#endif //defined(__cplusplus)
//initialize
extern void swi2c_init(unsigned char sda, unsigned char scl, unsigned char cfg);
extern void swi2c_init(void);
//check device address acknowledge
extern int swi2c_check(unsigned char dev_addr);
extern uint8_t swi2c_check(uint8_t dev_addr);
//read write functions - 8bit address (most i2c chips)
#ifdef SWI2C_A8
extern int swi2c_readByte_A8(unsigned char dev_addr, unsigned char addr, unsigned char* pbyte);
extern int swi2c_writeByte_A8(unsigned char dev_addr, unsigned char addr, unsigned char* pbyte);
extern uint8_t swi2c_readByte_A8(uint8_t dev_addr, uint8_t addr, uint8_t* pbyte);
extern uint8_t swi2c_writeByte_A8(uint8_t dev_addr, uint8_t addr, uint8_t* pbyte);
#endif //SWI2C_A8
//read write functions - 16bit address (e.g. serial eeprom AT24C256)
#ifdef SWI2C_A16
extern int swi2c_readByte_A16(unsigned char dev_addr, unsigned short addr, unsigned char* pbyte);
extern int swi2c_writeByte_A16(unsigned char dev_addr, unsigned short addr, unsigned char* pbyte);
extern uint8_t swi2c_readByte_A16(uint8_t dev_addr, uint16_t addr, uint8_t* pbyte);
extern uint8_t swi2c_writeByte_A16(uint8_t dev_addr, uint16_t addr, uint8_t* pbyte);
#endif //SWI2C_A16
#if defined(__cplusplus)
}
#endif //defined(__cplusplus)
#endif //SWI2C_H