TFT (plus Hardware SPI) for LPC (#19139)

Marlin/src/HAL/LPC1768/include/SPI.h

@@ -24,25 +24,139 @@
 #include "../../shared/HAL_SPI.h"
 
 #include <stdint.h>
+#include <lpc17xx_ssp.h>
+#include <lpc17xx_gpdma.h>
 
-#define MSBFIRST 1
-#define SPI_MODE3 0
+//#define MSBFIRST 1
+
+#define SPI_MODE0 0
+#define SPI_MODE1 1
+#define SPI_MODE2 2
+#define SPI_MODE3 3
+
+#define DATA_SIZE_8BIT SSP_DATABIT_8
+#define DATA_SIZE_16BIT SSP_DATABIT_16
+
+#define SPI_CLOCK_DIV2   8333333 //(SCR:  2)  desired: 8,000,000  actual: 8,333,333  +4.2%  SPI_FULL_SPEED
+#define SPI_CLOCK_DIV4   4166667 //(SCR:  5)  desired: 4,000,000  actual: 4,166,667  +4.2%  SPI_HALF_SPEED
+#define SPI_CLOCK_DIV8   2083333 //(SCR: 11)  desired: 2,000,000  actual: 2,083,333  +4.2%  SPI_QUARTER_SPEED
+#define SPI_CLOCK_DIV16  1000000 //(SCR: 24)  desired: 1,000,000  actual: 1,000,000         SPI_EIGHTH_SPEED
+#define SPI_CLOCK_DIV32   500000 //(SCR: 49)  desired:   500,000  actual:   500,000         SPI_SPEED_5
+#define SPI_CLOCK_DIV64   250000 //(SCR: 99)  desired:   250,000  actual:   250,000         SPI_SPEED_6
+#define SPI_CLOCK_DIV128  125000 //(SCR:199)  desired:   125,000  actual:   125,000         Default from HAL.h
+
+#define SPI_CLOCK_MAX SPI_CLOCK_DIV2
+
+#define BOARD_NR_SPI 2
+
+//#define BOARD_SPI1_NSS_PIN      PA4 ?!
+#define BOARD_SPI1_SCK_PIN      P0_15
+#define BOARD_SPI1_MISO_PIN     P0_17
+#define BOARD_SPI1_MOSI_PIN     P0_18
+
+//#define BOARD_SPI2_NSS_PIN      PB12 ?!
+#define BOARD_SPI2_SCK_PIN      P0_07
+#define BOARD_SPI2_MISO_PIN     P0_08
+#define BOARD_SPI2_MOSI_PIN     P0_09
 
 class SPISettings {
-  public:
-    SPISettings(uint32_t speed, int, int) : spi_speed(speed) {};
-    uint32_t spiRate() const { return spi_speed; }
-  private:
-    uint32_t spi_speed;
+public:
+  SPISettings(uint32_t speed, int, int) : spi_speed(speed) {};
+  SPISettings(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) {
+    if (__builtin_constant_p(inClock))
+      init_AlwaysInline(inClock, inBitOrder, inDataMode, inDataSize);
+    else
+      init_MightInline(inClock, inBitOrder, inDataMode, inDataSize);
+  }
+  SPISettings() {
+    init_AlwaysInline(4000000, MSBFIRST, SPI_MODE0, DATA_SIZE_8BIT);
+  }
+
+  uint32_t spiRate() const { return spi_speed; }
+
+private:
+  void init_MightInline(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) {
+    init_AlwaysInline(inClock, inBitOrder, inDataMode, inDataSize);
+  }
+  void init_AlwaysInline(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) __attribute__((__always_inline__)) {
+    clock    = inClock;
+    bitOrder = inBitOrder;
+    dataMode = inDataMode;
+    dataSize = inDataSize;
+  }
+
+  uint32_t spi_speed;
+  uint32_t clock;
+  uint32_t dataSize;
+  //uint32_t clockDivider;
+  uint8_t bitOrder;
+  uint8_t dataMode;
+  LPC_SSP_TypeDef *spi_d;
+
+  friend class SPIClass;
 };
 
+/**
+ * @brief Wirish SPI interface.
+ *
+ * This is the same interface is available across HAL
+ *
+ * This implementation uses software slave management, so the caller
+ * is responsible for controlling the slave select line.
+ */
 class SPIClass {
-  public:
-    void begin();
-    void beginTransaction(const SPISettings&);
-    void endTransaction() {};
-    uint8_t transfer(uint8_t data);
-    uint16_t transfer16(uint16_t data);
+public:
+  /**
+   * @param spiPortNumber Number of the SPI port to manage.
+   */
+  SPIClass(uint8_t spiPortNumber);
+
+  /**
+   * Select and configure the current selected SPI device to use
+   */
+  void begin();
+
+  /**
+   * Disable the current SPI device
+   */
+  void end();
+
+  void beginTransaction(const SPISettings&);
+  void endTransaction() {};
+
+  // Transfer using 1 "Data Size"
+  uint8_t transfer(uint16_t data);
+  // Transfer 2 bytes in 8 bit mode
+  uint16_t transfer16(uint16_t data);
+
+  void send(uint8_t data);
+
+  uint16_t read();
+  void read(uint8_t *buf, uint32_t len);
+
+  void dmaSend(void *buf, uint16_t length, bool minc);
+
+  /**
+   * @brief Sets the number of the SPI peripheral to be used by
+   *        this HardwareSPI instance.
+   *
+   * @param spi_num Number of the SPI port. 1-2 in low density devices
+   *     or 1-3 in high density devices.
+   */
+  void setModule(uint8_t device);
+
+  void setClock(uint32_t clock);
+  void setBitOrder(uint8_t bitOrder);
+  void setDataMode(uint8_t dataMode);
+  void setDataSize(uint32_t ds);
+
+  inline uint32_t getDataSize() { return _currentSetting->dataSize; }
+
+private:
+  SPISettings _settings[BOARD_NR_SPI];
+  SPISettings *_currentSetting;
+
+  void updateSettings();
 };
 
 extern SPIClass SPI;