arduino/esp8266
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fix UART RX PullUps and TWI

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This commit is contained in:
ficeto 2015-05-03 17:51:06 +03:00
parent fcbd7dbed0
commit 3d0dafcbc0
4 changed files with 36 additions and 26 deletions
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2
cores/esp8266/Arduino.h
View File

@ -37,7 +37,7 @@ extern "C" {
#include "binary.h"
#include "pgmspace.h"
#include "esp8266_peri.h"
#include "si2c.h"
#include "twi.h"
void yield(void);

40
cores/esp8266/si2c.c → cores/esp8266/core_esp8266_si2c.c
View File

@ -18,12 +18,12 @@
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "si2c.h"
#include "twi.h"
#include "pins_arduino.h"
#include "wiring_private.h"
uint8_t twi_dcount = 18;
static uint8_t twi_sda, twi_scl;
unsigned char twi_dcount = 18;
static unsigned char twi_sda, twi_scl;
#define SDA_LOW() (GPES = (1 << twi_sda)) //Enable SDA (becomes output and since GPO is 0 for the pin, it will pull the line low)
#define SDA_HIGH() (GPEC = (1 << twi_sda)) //Disable SDA (becomes input and since it has pullup it will go high)
@ -42,7 +42,7 @@ static uint8_t twi_sda, twi_scl;
#define TWI_CLOCK_STRETCH 400
#endif
void twi_setClock(uint32_t freq){
void twi_setClock(unsigned int freq){
#if F_CPU == FCPU80
if(freq <= 100000) twi_dcount = 18;//about 100KHz
else if(freq <= 200000) twi_dcount = 8;//about 200KHz
@ -58,7 +58,7 @@ void twi_setClock(uint32_t freq){
#endif
}
void twi_init(uint8_t sda, uint8_t scl){
void twi_init(unsigned char sda, unsigned char scl){
twi_sda = sda;
twi_scl = scl;
pinMode(twi_sda, INPUT_PULLUP);
@ -71,9 +71,9 @@ void twi_stop(void){
pinMode(twi_scl, INPUT);
}
static void twi_delay(uint8_t v){
uint8_t i;
uint32_t reg;
static void twi_delay(unsigned char v){
unsigned char i;
unsigned int reg;
for(i=0;i<v;i++) reg = GPI;
}
@ -88,7 +88,7 @@ static bool twi_write_start(void) {
}
static bool twi_write_stop(void){
uint8_t i = 0;
unsigned char i = 0;
SCL_LOW();
SDA_LOW();
twi_delay(twi_dcount);
@ -102,7 +102,7 @@ static bool twi_write_stop(void){
}
static bool twi_write_bit(bool bit) {
uint8_t i = 0;
unsigned char i = 0;
SCL_LOW();
if (bit) SDA_HIGH();
else SDA_LOW();
@ -114,7 +114,7 @@ static bool twi_write_bit(bool bit) {
}
static bool twi_read_bit(void) {
uint8_t i = 0;
unsigned char i = 0;
SCL_LOW();
SDA_HIGH();
twi_delay(twi_dcount+1);
@ -125,8 +125,8 @@ static bool twi_read_bit(void) {
return bit;
}
static bool twi_write_byte(uint8_t byte) {
uint8_t bit;
static bool twi_write_byte(unsigned char byte) {
unsigned char bit;
for (bit = 0; bit < 8; bit++) {
twi_write_bit(byte & 0x80);
byte <<= 1;
@ -134,16 +134,16 @@ static bool twi_write_byte(uint8_t byte) {
return twi_read_bit();//NACK/ACK
}
static uint8_t twi_read_byte(bool nack) {
uint8_t byte = 0;
uint8_t bit;
static unsigned char twi_read_byte(bool nack) {
unsigned char byte = 0;
unsigned char bit;
for (bit = 0; bit < 8; bit++) byte = (byte << 1) | twi_read_bit();
twi_write_bit(nack);
return byte;
}
uint8_t twi_writeTo(uint8_t address, uint8_t * buf, uint32_t len, uint8_t sendStop){
uint32_t i;
unsigned char twi_writeTo(unsigned char address, unsigned char * buf, unsigned int len, unsigned char sendStop){
unsigned int i;
if(!twi_write_start()) return 4;//line busy
if(!twi_write_byte(((address << 1) | 0) & 0xFF)) return 2;//received NACK on transmit of address
for(i=0; i<len; i++){
@ -153,8 +153,8 @@ uint8_t twi_writeTo(uint8_t address, uint8_t * buf, uint32_t len, uint8_t sendSt
return 0;
}
uint8_t twi_readFrom(uint8_t address, uint8_t* buf, uint32_t len, uint8_t sendStop){
uint32_t i;
unsigned char twi_readFrom(unsigned char address, unsigned char* buf, unsigned int len, unsigned char sendStop){
unsigned int i;
if(!twi_write_start()) return 4;//line busy
if(!twi_write_byte(((address << 1) | 1) & 0xFF)) return 2;//received NACK on transmit of address
for(i=0; i<len; i++) buf[i] = twi_read_byte(false);

2
cores/esp8266/core_esp8266_wiring_digital.c
View File

@ -31,10 +31,12 @@ extern void __pinMode(uint8_t pin, uint8_t mode) {
GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
GPEC = (1 << pin); //Disable
GPF(pin) = GPFFS(GPFFS_BUS(pin));//Set mode to BUS (RX0, TX0, TX1, SPI, HSPI or CLK depending in the pin)
if(pin == 3) GPF(pin) |= (1 << GPFPU);//enable pullup on RX
} else if(mode & FUNCTION_0){
GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
GPEC = (1 << pin); //Disable
GPF(pin) = GPFFS((mode >> 4) & 0x07);
if(pin == 13 && mode == FUNCTION_4) GPF(pin) |= (1 << GPFPU);//enable pullup on RX
} else if(mode == OUTPUT){
GPF(pin) = GPFFS(GPFFS_GPIO(pin));//Set mode to GPIO
GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)

18
cores/esp8266/si2c.h → cores/esp8266/twi.h
View File

@ -1,5 +1,5 @@
/*
si2c.h - Software I2C library for esp8266
twi.h - Software I2C library for esp8266
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
@ -22,10 +22,18 @@
#define SI2C_h
#include "Arduino.h"
void twi_init(uint8_t sda, uint8_t scl);
#ifdef __cplusplus
extern "C" {
#endif
void twi_init(unsigned char sda, unsigned char scl);
void twi_stop(void);
void twi_setClock(uint32_t freq);
uint8_t twi_writeTo(uint8_t address, uint8_t * buf, uint32_t len, uint8_t sendStop);
uint8_t twi_readFrom(uint8_t address, uint8_t * buf, uint32_t len, uint8_t sendStop);
void twi_setClock(unsigned int freq);
uint8_t twi_writeTo(unsigned char address, unsigned char * buf, unsigned int len, unsigned char sendStop);
uint8_t twi_readFrom(unsigned char address, unsigned char * buf, unsigned int len, unsigned char sendStop);
#ifdef __cplusplus
}
#endif
#endif