FW-874 TX_RX for SX1276 module

bsp/boards/openmote-b/board.c

@@ -83,7 +83,7 @@ void board_init(void) {
    uart_init();
    radio_init();
    i2c_init();
-   sensors_init();
+   //sensors_init();
    cryptoengine_init();  
 }
 

bsp/boards/openmote-b/sensors.c

@@ -8,7 +8,7 @@
 #include "board.h"
 #include "sensors.h"
 
-#include "si70x.h"
+//#include "si70x.h"
 
 //=========================== defines =========================================
 
@@ -25,7 +25,7 @@ sensors_vars_t sensors_vars;
 /**
    \brief Initialize sensors on the board
 */
-void sensors_init(void) {
+/*void sensors_init(void) {
 
    memset(&sensors_vars,0,sizeof(sensors_vars_t));
 
@@ -38,23 +38,23 @@ void sensors_init(void) {
    adc_sensor_init();
    sensors_vars.sensorsTypes[SENSOR_ADCTEMPERATURE] = 1;
 
-}
+}*/
 
 /**
    \brief Returns a bool value indicating if a given sensor is present
    \param[in] sensorType sensor type polled.
    \param[out] returnVal presence of the sensor.
 */
-bool sensors_is_present(uint8_t sensorType) {
+/*bool sensors_is_present(uint8_t sensorType) {
    return sensors_vars.sensorsTypes[sensorType];
-}
+}*/
 
 /**
    \brief Returns the callback for reading data from a given sensor
    \param[in] sensorType sensor type used to associate the callback.
    \param[out] callback for reading data.
 */
-callbackRead_cbt sensors_getCallbackRead(uint8_t sensorType) {
+/*callbackRead_cbt sensors_getCallbackRead(uint8_t sensorType) {
 
    switch (sensorType) {
       case SENSOR_TEMPERATURE:
@@ -67,14 +67,14 @@ callbackRead_cbt sensors_getCallbackRead(uint8_t sensorType) {
          return NULL;
    }
 
-}
+}*/
 
 /**
    \brief Returns the callback for converting data from a given sensor
    \param[in] sensorType sensor type used to associate the callback.
    \param[out] callback for converting data.
 */
-callbackConvert_cbt sensors_getCallbackConvert(uint8_t sensorType) {
+/*callbackConvert_cbt sensors_getCallbackConvert(uint8_t sensorType) {
 
    switch (sensorType) {
       case SENSOR_TEMPERATURE:
@@ -87,6 +87,6 @@ callbackConvert_cbt sensors_getCallbackConvert(uint8_t sensorType) {
          return NULL;
    }
 
-}
+}*/
 
 //=========================== private =========================================

projects/openmote-b/00std_spi/00std_spi.c

@@ -0,0 +1,230 @@
+/**
+\brief definition of the "spi" bsp module.
+\author Xavier Vilajosana <xvilajosana@eecs.berkeley.edu>, September 2017.
+*/
+#include "board.h"
+#include "board_info.h"
+#include "ssi.h"
+#include "spi.h"
+#include "gpio.h"
+#include "ioc.h"
+#include "sys_ctrl.h"
+
+#include <headers/hw_ints.h>
+#include <headers/hw_ioc.h>
+#include <headers/hw_memmap.h>
+#include <headers/hw_ssi.h>
+#include <headers/hw_sys_ctrl.h>
+#include <headers/hw_types.h>
+
+
+//=========================== defines =========================================
+#define SPI_PIN_SSI_CLK             GPIO_PIN_0      //    CLK
+#define SPI_PIN_SSI_FSS             GPIO_PIN_1      //    CSn
+#define SPI_PIN_SSI_RX              GPIO_PIN_2      //    MISO
+#define SPI_PIN_SSI_TX              GPIO_PIN_3      //    MOSI
+#define SPI_GPIO_SSI_BASE           GPIO_B_BASE
+
+//=========================== variables =======================================
+
+typedef struct {
+    // information about the current transaction
+    uint8_t*        pNextTxByte;
+    uint16_t        numTxedBytes;
+    uint16_t        txBytesLeft;
+    spi_return_t    returnType;
+    uint8_t*        pNextRxByte;
+    uint16_t        maxRxBytes;
+    spi_first_t     isFirst;
+    spi_last_t      isLast;
+    // state of the module
+    uint8_t         busy;
+#ifdef SPI_IN_INTERRUPT_MODE
+    // callback when module done
+    spi_cbt         callback;
+#endif
+} spi_vars_t;
+
+spi_vars_t spi_vars;
+
+//*********Variables to use as parameters of spi_txrx function****************//
+
+static char stringToPrint[]="MessageToTest\r\n";
+size_t len=sizeof(stringToPrint);
+
+//=========================== prototypes ======================================
+static void disableInterrupts(void);
+static void enableInterrupts(void);
+//=========================== public ==========================================
+
+void spi_init(){
+    // clear variables
+    memset(&spi_vars,0,sizeof(spi_vars_t));
+
+    //Set the CLK , MOSI(TX) and MISO(RX) pins as Hardware-controlled (Configures GPIO_AFSEL-->1)
+    GPIOPinTypeSSI(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_CLK );
+    GPIOPinTypeSSI(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_RX );
+    GPIOPinTypeSSI(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_TX );
+
+    //Set the SS pin as Software-controlled outputs (configures GPIO_AFSEL-->0 (software) and GPIO_DIR-->1 (Output) )
+    //Only FSS can be used as SOFTWARE controlled OUTPUT
+    GPIOPinTypeGPIOOutput(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_FSS);
+
+    //Set SS to High (writes into GPIO_DATA register)
+    GPIOPinWrite(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_FSS, SPI_PIN_SSI_FSS);
+
+    /*//Set pins to low
+    GPIOPinWrite(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_TX, 0);
+    GPIOPinWrite(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_CLK, 0);*/
+
+    //Configuration of SSI1 peripheral
+    SysCtrlPeripheralEnable(SYS_CTRL_PERIPH_SSI1);
+    SysCtrlPeripheralSleepEnable(SYS_CTRL_PERIPH_SSI1);
+    SysCtrlPeripheralDeepSleepDisable(SYS_CTRL_PERIPH_SSI1);
+
+    //Disabling SSI (writes into SSI_CR1 --> 0)
+    SSIDisable(SSI1_BASE);
+
+    //Set clock source (The baud clock source for the SSI to select.)
+    SSIClockSourceSet(SSI1_BASE, SSI_CLOCK_PIOSC); //The precision internal oscillator
+
+    /*Configure output signal to IOC_Pxx_SEL register
+    Each signal is identified with its address table 9.1 in T.I datasheet*/
+    IOCPinConfigPeriphOutput(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_CLK, IOC_MUX_OUT_SEL_SSI1_CLKOUT);
+    IOCPinConfigPeriphOutput(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_TX, IOC_MUX_OUT_SEL_SSI1_TXD);
+    IOCPinConfigPeriphOutput(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_FSS, IOC_MUX_OUT_SEL_SSI1_FSSOUT);
+    //Configures hardware peripheral input selection (i.e. IOC_SSIRXD_SSI1)
+    IOCPinConfigPeriphInput(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_RX, IOC_SSIRXD_SSI1);
+
+
+    //Sets SSI_CR0 (SPI MODE and Data Size), SSI_CR1(Protocol), SSI_CPSR(Clock prescaler divisor)
+    //According to the LoRaSX1276 datasheet, the corresponding mode is CPOL=0 , CPHA=0 which is FRF mode 0
+    SSIConfigSetExpClk(SSI1_BASE, SysCtrlIOClockGet(), SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, SysCtrlIOClockGet()/2/*16000000*/, 8);
+
+    //Enable the SSI1 module(writes into CR1)
+    SSIEnable(SSI1_BASE);
+
+    //Call the spi_txrx function
+    spi_txrx((uint8_t*)stringToPrint,len,SPI_FIRSTBYTE,(uint8_t*)16,16,SPI_FIRST,SPI_NOTLAST);
+}
+
+#ifdef SPI_IN_INTERRUPT_MODE
+void spi_setCb(spi_cbt cb) {
+   spi_vars.spi_cb = cb;
+}
+#endif
+
+void    spi_txrx(uint8_t*     bufTx,
+                 uint16_t     lenbufTx,
+                 spi_return_t returnType,
+                 uint8_t*     bufRx,
+                 uint16_t     maxLenBufRx,
+                 spi_first_t  isFirst,
+                 spi_last_t   isLast) {
+
+    uint32_t data,i;
+    GPIOPinWrite(GPIO_C_BASE, GPIO_PIN_3, GPIO_PIN_3);
+    // register spi frame to send
+    spi_vars.pNextTxByte      =  bufTx;
+    spi_vars.numTxedBytes     =  0;
+    spi_vars.txBytesLeft      =  lenbufTx;
+    spi_vars.returnType       =  returnType;
+    spi_vars.pNextRxByte      =  bufRx;
+    spi_vars.maxRxBytes       =  maxLenBufRx;
+    spi_vars.isFirst          =  isFirst;
+    spi_vars.isLast           =  isLast;
+
+    // SPI is now busy
+    spi_vars.busy             =  1;
+
+    // lower CS signal to have slave listening (FSS is managed through software, not hardware)
+    if (spi_vars.isFirst==SPI_FIRST) {
+       GPIOPinWrite(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_FSS, 0);
+    }
+
+    for ( i =  0; i < lenbufTx; i++)
+    {
+        // Push a byte
+        SSIDataPut(SSI1_BASE, spi_vars.pNextTxByte[i]);
+
+        // Wait until it is complete
+        while(SSIBusy(SSI1_BASE));
+
+        // Read a byte
+        SSIDataGet(SSI1_BASE, &data);
+
+        // Store the result
+        spi_vars.pNextRxByte[i] = (uint8_t)(data & 0xFF);
+        // one byte less to go
+     }
+
+     if (spi_vars.isLast==SPI_LAST) {
+        GPIOPinWrite(SPI_GPIO_SSI_BASE, SPI_PIN_SSI_FSS, SPI_PIN_SSI_FSS);
+     }
+
+    // SPI is not busy anymore
+    spi_vars.busy             =  0;
+    GPIOPinWrite(GPIO_C_BASE, GPIO_PIN_3, 0);
+}
+
+//=========================== private =========================================
+
+port_INLINE void enableInterrupts(void)
+{
+    // Enable the SPI interrupt
+    SSIIntEnable(SSI1_BASE, (SSI_TXFF | SSI_RXFF | SSI_RXTO | SSI_RXOR));
+
+    // Enable the SPI interrupt
+    IntEnable(INT_SSI1);
+}
+
+port_INLINE void disableInterrupts(void)
+{
+    // Disable the SPI interrupt
+    SSIIntDisable(SSI1_BASE, (SSI_TXFF | SSI_RXFF | SSI_RXTO | SSI_RXOR));
+
+    // Disable the SPI interrupt
+    IntDisable(INT_SSI1);
+}
+
+//=========================== interrupt handlers ==============================
+
+kick_scheduler_t spi_isr() {
+#ifdef SPI_IN_INTERRUPT_MODE
+    uint32_t data;
+    // save the byte just received in the RX buffer
+    status = SSIIntStatus(SSI1_BASE, true);
+
+    // Clear SPI interrupt in the NVIC
+    IntPendClear(INT_SSI1);
+
+    SSIDataGet(SSI1_BASE, &data);
+
+    // Store the result
+    spi_vars.pNextRxByte = (uint8_t)(data & 0xFF);
+
+    // one byte less to go
+    spi_vars.pNextTxByte++;
+    spi_vars.pNextRxByte++;
+    spi_vars.txBytesLeft--;
+
+    if (spi_vars.txBytesLeft>0) {
+        // write next byte to TX buffer
+        SSIDataPut(SSI1_BASE, *spi_vars.pNextTxByte);
+
+    } else {
+        // SPI is not busy anymore
+        spi_vars.busy             =  0;
+
+        // SPI is done!
+        if (spi_vars.callback!=NULL) {
+           // call the callback
+            spi_vars.spi_cb();
+            // kick the OS
+            return KICK_SCHEDULER;
+        }
+    }
+
+#endif
+    return DO_NOT_KICK_SCHEDULER;
+}