Diff: BLE/src/ble_spi.cpp

Revision:

258:150f5a76162d

Child:

259:341f04be325e

diff -r e22102d2e079 -r 150f5a76162d BLE/src/ble_spi.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BLE/src/ble_spi.cpp	Mon Oct 24 21:06:45 2016 +0000
@@ -0,0 +1,165 @@
+/**
+  ******************************************************************************
+  * @file    ble_uart.cpp
+  * @author  Happiesstminds Firmware Team
+  * @version v1.0
+  * @date    4-Oct-2016
+  * @brief   
+  *
+  ******************************************************************************
+  * @attention
+  *  
+  *
+  ******************************************************************************
+  */
+
+/******************************************************************************/
+/* Include Files*/
+/******************************************************************************/
+#include "mbed.h"
+#include "ble_msg_handler.h"
+/******************************************************************************/
+/* Local Defines                                                              */
+/******************************************************************************/
+SPI spimaster(SPI1_MOSI, SPI1_MISO, SPI1_SCK);
+DigitalOut cs(SPI1_CS);
+
+/******************************************************************************/
+/* Global Functions                                                              */
+/******************************************************************************/
+/*****************************************************************************
+ * Function:            InitSpiMaster()
+ * Description:         InitSpiMaster 
+ *
+ * @param               None
+ * @return              none
+ *****************************************************************************/
+uint8_t InitSpiMaster(void)
+{
+     uint8_t status = SUCCESS;
+    // Chip must be deselected
+    cs = 1;
+    // Setup the spi for 8 bit data, high steady state clock,
+    // second edge capture, with a 1MHz clock rate
+    spimaster.format(8, 0);
+    // spimaster.frequency(1000000);
+    spimaster.frequency(1000000);
+    return status;
+}
+
+/*****************************************************************************
+ * Function:            WriteSpiData()
+ * Description:         WriteSpiData 
+ *
+ * @param               pointer to buffer
+  * @param              length
+ * @return              none
+ *****************************************************************************/
+uint8_t WriteSpiData(uint8_t * p_buffer, uint16_t length)
+{    
+    uint8_t i;
+    uint8_t status = SUCCESS;
+    int response[20];  //need to be removed
+    // Select the device by seting chip select low    
+    
+    for(i=0;i<length;i++)
+    {
+        cs = 0;
+        response[i] = spimaster.write(p_buffer[i]);
+        cs = 1;
+        wait_ms(5);
+    }    
+
+    return status;      
+}
+
+/*****************************************************************************
+ * Function:            ReadSpiData()
+ * Description:         ReadSpiData 
+ *
+ * @param               pointer to rx_buf
+ * @return              none
+ *****************************************************************************/
+uint8_t ReadSpiData(uint8_t *rx_buf)
+{    
+    uint8_t msg_len; 
+    int i;
+ 
+    // Dummy read to get first garbage value
+    cs = 0;
+    rx_buf[0] = spimaster.write(0xFF);
+    cs = 1;
+    wait_ms(5);
+    
+    cs = 0;
+    rx_buf[1] = spimaster.write(0xFF);
+    cs = 1;
+    wait_ms(5);
+    
+    cs = 0;
+    rx_buf[2] = spimaster.write(0xFF);
+    cs = 1;
+    wait_ms(5);
+    
+    cs = 0;
+    rx_buf[3] = spimaster.write(0xFF);
+    cs = 1;
+    wait_ms(5);
+    
+    msg_len = rx_buf[3];
+  
+    for(i = 4; i < msg_len; i++)
+    {
+        cs = 0;
+        rx_buf[i] = spimaster.write(0xFF);
+        cs = 1;
+        wait_ms(5);
+    } 
+    return (msg_len);
+    
+}
+
+/*****************************************************************************
+ * Function:            PollBLEEvents()
+ * Description:         Polls for BLE events
+ * @param               pointer to rx_buf
+ * @return              none
+ *****************************************************************************/
+ 
+uint8_t PollBLEEvents(uint8_t *rx_buf)
+{
+    uint8_t i =0;
+    uint8_t msg_len;
+    
+    cs = 0;
+    rx_buf[0] = spimaster.write(0xAA);
+    cs = 1;
+    wait_ms(5);
+          
+    if(rx_buf[0]==0x01)
+    {        
+        cs = 0;
+        rx_buf[1] = spimaster.write(0xAA);
+        cs = 1;
+        wait_ms(5);
+        cs = 0;
+        rx_buf[2] = spimaster.write(0xAA);
+        cs = 1;
+        wait_ms(5);
+        
+        msg_len = rx_buf[2];
+        for(i = 3; i < msg_len; i++)
+        {
+            cs = 0;
+            rx_buf[i] = spimaster.write(0xFF);
+            cs = 1;
+            wait_ms(5);
+        }
+        
+        ProcessBleRxEvents(rx_buf,rx_buf[2]);
+    }    
+    return  rx_buf[0];    
+}
+/******************************************************************************/
+/* END OF FILE                                                                */
+/******************************************************************************/
\ No newline at end of file