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#ifndef __INC_FASTSPI_ARM_SAM_H
#define __INC_FASTSPI_ARM_SAM_H
#if 0 // guard against the arduino ide idiotically including every header file
#include "FastLED.h"
FASTLED_NAMESPACE_BEGIN
// A skeletal implementation of hardware SPI support. Fill in the necessary code for init, waiting, and writing. The rest of
// the method implementations should provide a starting point, even if not hte most efficient to start with
template <uint8_t _DATA_PIN, uint8_t _CLOCK_PIN, uint32_t _SPI_CLOCK_DIVIDER>
class REFHardwareSPIOutput {
Selectable *m_pSelect;
public:
SAMHardwareSPIOutput() { m_pSelect = NULL; }
SAMHArdwareSPIOutput(Selectable *pSelect) { m_pSelect = pSelect; }
// set the object representing the selectable
void setSelect(Selectable *pSelect) { /* TODO */ }
// initialize the SPI subssytem
void init() { /* TODO */ }
// latch the CS select
void inline select() __attribute__((always_inline)) { if(m_pSelect != NULL) { m_pSelect->select(); } }
// release the CS select
void inline release() __attribute__((always_inline)) { if(m_pSelect != NULL) { m_pSelect->release(); } }
// wait until all queued up data has been written
static void waitFully() { /* TODO */ }
// write a byte out via SPI (returns immediately on writing register)
static void writeByte(uint8_t b) { /* TODO */ }
// write a word out via SPI (returns immediately on writing register)
static void writeWord(uint16_t w) { /* TODO */ }
// A raw set of writing byte values, assumes setup/init/waiting done elsewhere
static void writeBytesValueRaw(uint8_t value, int len) {
while(len--) { writeByte(value); }
}
// A full cycle of writing a value for len bytes, including select, release, and waiting
void writeBytesValue(uint8_t value, int len) {
select(); writeBytesValueRaw(value, len); release();
}
// A full cycle of writing a value for len bytes, including select, release, and waiting
template <class D> void writeBytes(register uint8_t *data, int len) {
uint8_t *end = data + len;
select();
// could be optimized to write 16bit words out instead of 8bit bytes
while(data != end) {
writeByte(D::adjust(*data++));
}
D::postBlock(len);
waitFully();
release();
}
// A full cycle of writing a value for len bytes, including select, release, and waiting
void writeBytes(register uint8_t *data, int len) { writeBytes<DATA_NOP>(data, len); }
// write a single bit out, which bit from the passed in byte is determined by template parameter
template <uint8_t BIT> inline static void writeBit(uint8_t b) { /* TODO */ }
// write a block of uint8_ts out in groups of three. len is the total number of uint8_ts to write out. The template
// parameters indicate how many uint8_ts to skip at the beginning and/or end of each grouping
template <uint8_t FLAGS, class D, EOrder RGB_ORDER> void writePixels(PixelController<RGB_ORDER> pixels) {
select();
while(data != end) {
if(FLAGS & FLAG_START_BIT) {
writeBit<0>(1);
}
writeByte(D::adjust(pixels.loadAndScale0()));
writeByte(D::adjust(pixels.loadAndScale1()));
writeByte(D::adjust(pixels.loadAndScale2()));
pixels.advanceData();
pixels.stepDithering();
data += (3+skip);
}
D::postBlock(len);
release();
}
};
FASTLED_NAMESPACE_END
#endif
#endif
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