Merge pull request ARMmbed#50 from linlingao/spi_port

Add the 1st draft of SPI HAL driver. Fix more compiler warnings.

Author: linlingao

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/PinNames.h

@@ -121,6 +121,18 @@ typedef enum {
     BUTTON1 = PIN_04,
     BUTTON2 = PIN_15,
 
+    //SPI1
+    SPICC32XXDMA_MOSI = P07,
+    SPICC32XXDMA_MISO = P06,
+    SPICC32XXDMA_CLK  = P05,
+    SPICC32XXDMA_CS   = P08,
+
+    // CI Shield
+    D10 = SPICC32XXDMA_CS,
+    D11 = SPICC32XXDMA_MOSI,
+    D12 = SPICC32XXDMA_MISO,
+    D13 = SPICC32XXDMA_CLK,
+
     // Not connected
     NC = (int)0xFFFFFFFF,
     PIN_RESERVED = NC,

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/device/CC3220SF_LAUNCHXL.c

@@ -68,16 +68,6 @@ const uint_least8_t SPI_count = CC3220SF_LAUNCHXL_SPICOUNT;
  */
 void CC3220SF_LAUNCHXL_initGeneral(void)
 {
-    PRCMPeripheralReset(PRCM_TIMERA0);
-    PRCMPeripheralReset(PRCM_TIMERA1);
-    PRCMPeripheralReset(PRCM_TIMERA2);
-    PRCMPeripheralReset(PRCM_TIMERA3);
-    PRCMPeripheralReset(PRCM_UARTA0);
-    PRCMPeripheralReset(PRCM_UARTA1);
-    PRCMPeripheralReset(PRCM_GPIOA0);
-    PRCMPeripheralReset(PRCM_GPIOA1);
-    PRCMPeripheralReset(PRCM_GPIOA2);
-    PRCMPeripheralReset(PRCM_GPIOA3);
     MAP_IntMasterEnable();
     //MAP_IntEnable(FAULT_SYSTICK);
     PRCMCC3200MCUInit();

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/objects.h

@@ -16,6 +16,7 @@
 #ifndef MBED_OBJECTS_H
 #define MBED_OBJECTS_H
 
+#include "stdbool.h"
 #include "cmsis.h"
 #include "PortNames.h"
 #include "PeripheralNames.h"
@@ -60,6 +61,94 @@ struct serial_s {
     UART_PAR        parityType;      /* Parity bit type for UART */
 };
 
+typedef struct spi_clock_config_s {
+
+    //! \param ulSPIClk is the rate of clock supplied to the SPI module.
+    uint32_t ulSPIClk;
+
+    //! \param ulBitRate is the desired bit rate.(master mode)
+    uint32_t ulBitRate;
+
+    //!
+    //! The SPI module can operate in either master or slave mode. The parameter
+    //! \e ulMode can be one of the following
+    //! -\b SPI_MODE_MASTER
+    //! -\b SPI_MODE_SLAVE
+    uint32_t ulMode;
+
+    //!
+    //! The SPI module supports 4 sub modes based on SPI clock polarity and phase.
+    //!
+    //! <pre>
+    //! Polarity Phase  Sub-Mode
+    //!   0       0        0
+    //!   0       1        1
+    //!   1       0        2
+    //!   1       1        3
+    //! </pre>
+
+    //! Required sub mode can be select by setting \e ulSubMode parameter to one
+    //! of the following
+    //! - \b SPI_SUB_MODE_0
+    //! - \b SPI_SUB_MODE_1
+    //! - \b SPI_SUB_MODE_2
+    //! - \b SPI_SUB_MODE_3
+    uint32_t ulSubMode;
+
+    //! The parameter \e ulConfig is logical OR of five values: the word length,
+    //! active level for chip select, software or hardware controlled chip select,
+    //! 3 or 4 pin mode and turbo mode.
+    //! mode.
+    //!
+    //! SPI support 8, 16 and 32 bit word lengths defined by:-
+    //! - \b SPI_WL_8
+    //! - \b SPI_WL_16
+    //! - \b SPI_WL_32
+    //!
+    //! Active state of Chip Select can be defined by:-
+    //! - \b SPI_CS_ACTIVELOW
+    //! - \b SPI_CS_ACTIVEHIGH
+    //!
+    //! SPI chip select can be configured to be controlled either by hardware or
+    //! software:-
+    //! - \b SPI_SW_CS
+    //! - \b SPI_HW_CS
+    //!
+    //! The module can work in 3 or 4 pin mode defined by:-
+    //! - \b SPI_3PIN_MODE
+    //! - \b SPI_4PIN_MODE
+    //!
+    //! Turbo mode can be set on or turned off using:-
+    //! - \b SPI_TURBO_MODE_ON
+    //! - \b SPI_TURBO_MODE_OFF
+    uint32_t ulConfig;
+} spi_clock_config_t;
+
+struct spi_s {
+    /*! SPI module number */
+    uint32_t   instance;
+
+    /*! SPICC32XXDMA Peripheral's base address */
+    uint32_t   baseAddr;
+
+    /*! SPI Word lengh */
+    uint32_t   word_length;
+
+    /*! SPI clock configuration */
+    spi_clock_config_t clock_config;
+
+    /*! Is clock update needed */
+    bool clock_update;
+
+    /*! Is CS controlled by GPIO */
+    bool cs_control_gpio;
+
+#if DEVICE_SPI_ASYNCH
+    uint32_t handler;
+    uint32_t mask;
+    uint32_t event;
+#endif
+};
 #ifdef __cplusplus
 }
 #endif