57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
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#include <Adafruit_SPIDevice.h>
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#include <Arduino.h>
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//#define DEBUG_SERIAL Serial
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Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, uint32_t freq, BitOrder dataOrder, uint8_t dataMode, SPIClass *theSPI) {
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_cs = cspin;
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_spi = theSPI;
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_begun = false;
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_spiSetting = new SPISettings(freq, dataOrder, dataMode);
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}
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bool Adafruit_SPIDevice::begin(void) {
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_spi->begin();
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pinMode(_cs, OUTPUT);
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digitalWrite(_cs, HIGH);
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_begun = true;
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return true;
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}
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bool Adafruit_SPIDevice::write(uint8_t *buffer, size_t len, uint8_t *prefix_buffer, size_t prefix_len) {
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return true;
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}
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bool Adafruit_SPIDevice::read(uint8_t *buffer, size_t len, uint8_t sendvalue) {
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memset(buffer, sendvalue, len); // clear out existing buffer
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_spi->beginTransaction(*_spiSetting);
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digitalWrite(_cs, LOW);
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_spi->transfer(buffer, len);
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digitalWrite(_cs, HIGH);
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_spi->endTransaction();
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return true;
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}
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bool Adafruit_SPIDevice::write_then_read(uint8_t *write_buffer, size_t write_len, uint8_t *read_buffer, size_t read_len, uint8_t sendvalue) {
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_spi->beginTransaction(*_spiSetting);
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digitalWrite(_cs, LOW);
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// do the writing
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for (int i=0; i<write_len; i++) {
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_spi->transfer(write_buffer[i]);
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}
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// do the reading
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for (int i=0; i<read_len; i++) {
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read_buffer[i] = _spi->transfer(sendvalue);
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}
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digitalWrite(_cs, HIGH);
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_spi->endTransaction();
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return true;
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}
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