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esp32_Adafruit_BusIO
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update chunk

This commit is contained in:
caternuson 2021-09-27 11:26:21 -07:00
parent b903c7e015
commit 398210be46
2 changed files with 25 additions and 43 deletions
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66
Adafruit_I2CDevice.cpp
View File

@ -77,10 +77,19 @@ bool Adafruit_I2CDevice::detected(void) {
bool Adafruit_I2CDevice::write(const uint8_t *buffer, size_t len, bool stop,
const uint8_t *prefix_buffer,
size_t prefix_len) {
if ((len + prefix_len) > maxBufferSize()) {
// currently not guaranteed to work if more than 32 bytes!
// we will need to find out if some platforms have larger
// I2C buffer sizes :/
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.println(F("\tI2CDevice could not write such a large buffer"));
#endif
return false;
}
_wire->beginTransmission(_addr);
// Write the prefix data (usually an address)
// This is required to be less than _maxBufferSize, so no need to chunkify
if ((prefix_len != 0) && (prefix_buffer != NULL)) {
if (_wire->write(prefix_buffer, prefix_len) != prefix_len) {
#ifdef DEBUG_SERIAL
@ -90,32 +99,14 @@ bool Adafruit_I2CDevice::write(const uint8_t *buffer, size_t len, bool stop,
}
}
// Write the data itself, chunkify if needed
size_t bufferSize = maxBufferSize();
if (bufferSize >= len) {
// can just write
if (_wire->write(buffer, len) != len) {
// Write the data itself
if (_wire->write(buffer, len) != len) {
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.println(F("\tI2CDevice failed to write"));
DEBUG_SERIAL.println(F("\tI2CDevice failed to write"));
#endif
return false;
}
} else {
// must chunkify
size_t pos = 0;
uint8_t write_buffer[bufferSize];
while (pos < len) {
size_t write_len = len - pos > bufferSize ? bufferSize : len - pos;
for (size_t i = 0; i < write_len; i++)
write_buffer[i] = buffer[pos++];
if (_wire->write(write_buffer, write_len) != write_len) {
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.println(F("\tI2CDevice failed to write"));
#endif
return false;
}
}
return false;
}
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tI2CWRITE @ 0x"));
@ -146,7 +137,7 @@ bool Adafruit_I2CDevice::write(const uint8_t *buffer, size_t len, bool stop,
if (_wire->endTransmission(stop) == 0) {
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.println("Sent!");
// DEBUG_SERIAL.println("Sent!");
#endif
return true;
} else {
@ -166,24 +157,15 @@ bool Adafruit_I2CDevice::write(const uint8_t *buffer, size_t len, bool stop,
* @return True if read was successful, otherwise false.
*/
bool Adafruit_I2CDevice::read(uint8_t *buffer, size_t len, bool stop) {
size_t bufferSize = maxBufferSize();
if (bufferSize >= len) {
// can just read
return _read(buffer, len, stop);
} else {
// must chunkify
size_t pos = 0;
uint8_t read_buffer[bufferSize];
while (pos < len) {
size_t read_len = len - pos > bufferSize ? bufferSize : len - pos;
if (!_read(read_buffer, read_len, false)) {
return false;
}
for (size_t i = 0; i < read_len; i++)
buffer[pos++] = read_buffer[i];
}
return true;
size_t pos = 0;
while (pos < len) {
size_t read_len = len - pos > maxBufferSize() ? maxBufferSize() : len - pos;
bool read_stop = pos < (len - read_len) ? false : stop;
if (!_read(buffer + pos, read_len, read_stop))
return false;
pos += read_len;
}
return true;
}
bool Adafruit_I2CDevice::_read(uint8_t *buffer, size_t len, bool stop) {

2
library.properties
View File

@ -1,5 +1,5 @@
name=Adafruit BusIO
version=1.9.1
version=1.9.2
author=Adafruit
maintainer=Adafruit <info@adafruit.com>
sentence=This is a library for abstracting away UART, I2C and SPI interfacing