Version 2.0.1 - 5th June 2022

Author: johnsondavies

README.md

@@ -7,6 +7,8 @@ For more information and examples see [Tiny I2C Routines for all AVR Microcontro
 
 The main difference between these routines and the standard Arduino Wire library is that these don't use buffers, so have much smaller memory requirements and don't impose a limit on transmissions.
 
+Version 2.0.1 increases the number of bytes you can specify in a single transfer.
+
 ## Compatibility
 These I2C routines are designed to provide master I2C functionality for all Microchip/Atmel AVR processors. Over the years different generations of AVR chips have featured three different, incompatible peripherals to handle I2C:
 
@@ -71,7 +73,7 @@ Starts a transaction with the slave device at the specified address, and specifi
 The **type** parameter can have the following values:
 
 * 0: Write to the device.
-* 1 to 32767: Read from the device. The number specifies how many bytes you are going to read.
+* 1 to 2147483647: Read from the device. The number specifies how many bytes you are going to read.
 * -1: Read an unspecified number of bytes from the device.
 
 If **type** is specified as -1 you must identify the last byte read by calling **TinyI2C.readlast()** rather than  **TinyI2C.read()**.

TinyI2CMaster.cpp

@@ -1,6 +1,6 @@
-/* TinyI2C v2.0.0
+/* TinyI2C v2.0.1
 
-   David Johnson-Davies - www.technoblogy.com - Unreleased
+   David Johnson-Davies - www.technoblogy.com - 5th June 2022
    
    CC BY 4.0
    Licensed under a Creative Commons Attribution 4.0 International license: 
@@ -111,7 +111,7 @@ bool TinyI2CMaster::write (uint8_t data) {
 }
 
 // Start transmission by sending address
-bool TinyI2CMaster::start (uint8_t address, int readcount) {
+bool TinyI2CMaster::start (uint8_t address, int32_t readcount) {
   if (readcount != 0) { I2Ccount = readcount; readcount = 1; }
   uint8_t addressRW = address<<1 | readcount;
 
@@ -144,7 +144,7 @@ bool TinyI2CMaster::start (uint8_t address, int readcount) {
   return true;                                                    // Start successfully completed
 }
 
-bool TinyI2CMaster::restart(uint8_t address, int readcount) {
+bool TinyI2CMaster::restart(uint8_t address, int32_t readcount) {
   return TinyI2CMaster::start(address, readcount);
 }
 
@@ -209,7 +209,7 @@ bool TinyI2CMaster::write (uint8_t data) {
 }
 
 // Start transmission by sending address
-bool TinyI2CMaster::start (uint8_t address, int readcount) {
+bool TinyI2CMaster::start (uint8_t address, int32_t readcount) {
   bool read;
   if (readcount == 0) read = 0;                                   // Write
   else { I2Ccount = readcount; read = 1; }                        // Read
@@ -224,7 +224,7 @@ bool TinyI2CMaster::start (uint8_t address, int readcount) {
   else return (TWSR & 0xF8) == TWSR_MTX_ADR_ACK;
 }
 
-bool TinyI2CMaster::restart(uint8_t address, int readcount) {
+bool TinyI2CMaster::restart(uint8_t address, int32_t readcount) {
   return TinyI2CMaster::start(address, readcount);
 }
 
@@ -285,7 +285,7 @@ bool TinyI2CMaster::write (uint8_t data) {
 }
 
 // Start transmission by sending address
-bool TinyI2CMaster::start (uint8_t address, int readcount) {
+bool TinyI2CMaster::start (uint8_t address, int32_t readcount) {
   bool read;
   if (readcount == 0) read = 0;                                   // Write
   else { I2Ccount = readcount; read = 1; }                        // Read
@@ -302,7 +302,7 @@ bool TinyI2CMaster::start (uint8_t address, int readcount) {
   return true;                                                    // Return true if slave gave an ACK
 }
 
-bool TinyI2CMaster::restart(uint8_t address, int readcount) {
+bool TinyI2CMaster::restart(uint8_t address, int32_t readcount) {
   return TinyI2CMaster::start(address, readcount);
 }
 

TinyI2CMaster.h

@@ -1,6 +1,6 @@
-/* TinyI2C v2.0.0
+/* TinyI2C v2.0.1
 
-   David Johnson-Davies - www.technoblogy.com - 16th February 2022
+   David Johnson-Davies - www.technoblogy.com - 5th June 2022
    
    CC BY 4.0
    Licensed under a Creative Commons Attribution 4.0 International license: 
@@ -23,12 +23,12 @@ class TinyI2CMaster {
   uint8_t read(void);
   uint8_t readLast(void);
   bool write(uint8_t data);
-  bool start(uint8_t address, int readcount);
-  bool restart(uint8_t address, int readcount);
+  bool start(uint8_t address, int32_t readcount);
+  bool restart(uint8_t address, int32_t readcount);
   void stop(void);
 
 private:
-  int I2Ccount;
+  int32_t I2Ccount;
   uint8_t transfer(uint8_t data);
 };
 

library.properties

@@ -1,5 +1,5 @@
 name=TinyI2C
-version=2.0.0
+version=2.0.1
 author=Technoblogy
 maintainer=David Johnson-Davies <[email protected]>
 sentence=Minimal I2C master routines for AVR microcontrollers.