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esp32_Adafruit_BusIO
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This commit is contained in:
ladyada 2025-09-11 12:21:47 -04:00
parent fb90221892
commit bd4135b50c
1 changed files with 28 additions and 28 deletions
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20
Adafruit_SPIDevice.cpp
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@ -2,17 +2,17 @@
// #define DEBUG_SERIAL Serial // #define DEBUG_SERIAL Serial
#ifdef BUSIO_USE_FAST_PINIO #ifdef BUSIO_USE_FAST_PINIO
#define BUSIO_SET_CLOCK_LOW() (*clkPort = *clkPort & ~clkPinMask) #define BUSIO_SET_CLOCK_LOW() (*clkPort = *clkPort & ~clkPinMask)
#define BUSIO_SET_CLOCK_HIGH() (*clkPort = *clkPort | clkPinMask) #define BUSIO_SET_CLOCK_HIGH() (*clkPort = *clkPort | clkPinMask)
#define BUSIO_READ_MISO() (*misoPort & misoPinMask) #define BUSIO_READ_MISO() (*misoPort & misoPinMask)
#define BUSIO_WRITE_MOSI(value) do { \ #define BUSIO_WRITE_MOSI(value) \
if (value) \ do { \
*mosiPort = *mosiPort | mosiPinMask; \ if (value) \
else \ *mosiPort = *mosiPort | mosiPinMask; \
*mosiPort = *mosiPort & ~mosiPinMask; \ else \
} while(0) *mosiPort = *mosiPort & ~mosiPinMask; \
} while (0)
#else #else
#define BUSIO_SET_CLOCK_LOW() digitalWrite(_sck, LOW) #define BUSIO_SET_CLOCK_LOW() digitalWrite(_sck, LOW)
#define BUSIO_SET_CLOCK_HIGH() digitalWrite(_sck, HIGH) #define BUSIO_SET_CLOCK_HIGH() digitalWrite(_sck, HIGH)
@ -218,7 +218,7 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
} else if (_dataMode == SPI_MODE3) { } else if (_dataMode == SPI_MODE3) {
if (_mosi != -1) { // transmit on falling edge if (_mosi != -1) { // transmit on falling edge
BUSIO_WRITE_MOSI(send & b); BUSIO_WRITE_MOSI(send & b);
} }
@ -234,13 +234,13 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
delayMicroseconds(bitdelay_us); delayMicroseconds(bitdelay_us);
} }
if (_miso != -1) { // read on rising edge if (_miso != -1) { // read on rising edge
if (BUSIO_READ_MISO()) { if (BUSIO_READ_MISO()) {
reply |= b; reply |= b;
} }
} }
} else { // || _dataMode == SPI_MODE1) } else { // || _dataMode == SPI_MODE1)
BUSIO_SET_CLOCK_HIGH(); BUSIO_SET_CLOCK_HIGH();