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