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esp32_Adafruit_BusIO
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reuse beginTransactionWithAssertingCS()/endTransactionWithDeassertingCS()

This commit is contained in:
Christian Riggenbach 2022-05-02 20:37:06 +02:00
parent c00ec13218
commit f82f699c64
1 changed files with 8 additions and 38 deletions
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46
Adafruit_SPIDevice.cpp
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@ -326,11 +326,8 @@ void Adafruit_SPIDevice::endTransactionWithDeassertingCS() {
bool Adafruit_SPIDevice::write(const uint8_t *buffer, size_t len,
const uint8_t *prefix_buffer,
size_t prefix_len) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
beginTransactionWithAssertingCS();
setChipSelect(LOW);
// do the writing
#if defined(ARDUINO_ARCH_ESP32)
if (_spi) {
@ -350,11 +347,7 @@ bool Adafruit_SPIDevice::write(const uint8_t *buffer, size_t len,
transfer(buffer[i]);
}
}
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
endTransactionWithDeassertingCS();
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Wrote: "));
@ -391,17 +384,10 @@ bool Adafruit_SPIDevice::write(const uint8_t *buffer, size_t len,
*/
bool Adafruit_SPIDevice::read(uint8_t *buffer, size_t len, uint8_t sendvalue) {
memset(buffer, sendvalue, len); // clear out existing buffer
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
beginTransactionWithAssertingCS();
transfer(buffer, len);
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
endTransactionWithDeassertingCS();
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Read: "));
@ -435,11 +421,7 @@ bool Adafruit_SPIDevice::read(uint8_t *buffer, size_t len, uint8_t sendvalue) {
bool Adafruit_SPIDevice::write_then_read(const uint8_t *write_buffer,
size_t write_len, uint8_t *read_buffer,
size_t read_len, uint8_t sendvalue) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
beginTransactionWithAssertingCS();
// do the writing
#if defined(ARDUINO_ARCH_ESP32)
if (_spi) {
@ -485,11 +467,7 @@ bool Adafruit_SPIDevice::write_then_read(const uint8_t *write_buffer,
DEBUG_SERIAL.println();
#endif
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
endTransactionWithDeassertingCS();
return true;
}
@ -505,17 +483,9 @@ bool Adafruit_SPIDevice::write_then_read(const uint8_t *write_buffer,
* writes
*/
bool Adafruit_SPIDevice::write_and_read(uint8_t *buffer, size_t len) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
beginTransactionWithAssertingCS();
transfer(buffer, len);
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
endTransactionWithDeassertingCS();
return true;
}