Spieler splodiert.

[hackover2013-badge-firmware.git] / core / ssp / ssp.c

diff --git a/core/ssp/ssp.c b/core/ssp/ssp.c
index 284945c..de2910e 100644 (file)
--- a/core/ssp/ssp.c
+++ b/core/ssp/ssp.c
@@ -2,8 +2,6 @@
 /*! 
     @file     ssp.c
     @author   K. Townsend (microBuilder.eu)
 /*! 
     @file     ssp.c
     @author   K. Townsend (microBuilder.eu)

-    @date     22 March 2010
-    @version  0.10

 
     @section DESCRIPTION
 
 
     @section DESCRIPTION
 


@@ -40,7 +38,7 @@
 
     Software License Agreement (BSD License)
 
 
     Software License Agreement (BSD License)
 

-    Copyright (c) 2010, microBuilder SARL
+    Copyright (c) 2012, K. Townsend

     All rights reserved.
 
     Redistribution and use in source and binary forms, with or without
     All rights reserved.
 
     Redistribution and use in source and binary forms, with or without


@@ -181,7 +179,7 @@ void sspInit (uint8_t portNum, sspClockPolarity_t polarity, sspClockPhase_t phas
     gpioSetValue(SSP0_CSPORT, SSP0_CSPIN, 1);
     gpioSetPullup(&IOCON_PIO0_2, gpioPullupMode_Inactive);  // Board has external pull-up
   
     gpioSetValue(SSP0_CSPORT, SSP0_CSPIN, 1);
     gpioSetPullup(&IOCON_PIO0_2, gpioPullupMode_Inactive);  // Board has external pull-up
   

-    /* If SSP0CLKDIV = DIV1 -- (PCLK / (CPSDVSR × [SCR+1])) = (72,000,000 / (2 x [8 + 1])) = 4.0 MHz */
+    /* If SSP0CLKDIV = DIV1 -- (PCLK / (CPSDVSR * [SCR+1])) = (72,000,000 / (2 x [8 + 1])) = 4.0 MHz */

     uint32_t configReg = ( SSP_SSP0CR0_DSS_8BIT   // Data size = 8-bit
                   | SSP_SSP0CR0_FRF_SPI           // Frame format = SPI
                   | SSP_SSP0CR0_SCR_8);           // Serial clock rate = 8
     uint32_t configReg = ( SSP_SSP0CR0_DSS_8BIT   // Data size = 8-bit
                   | SSP_SSP0CR0_FRF_SPI           // Frame format = SPI
                   | SSP_SSP0CR0_SCR_8);           // Serial clock rate = 8


@@ -238,7 +236,7 @@ void sspInit (uint8_t portNum, sspClockPolarity_t polarity, sspClockPhase_t phas
                 Block length of the data buffer
 */
 /**************************************************************************/
                 Block length of the data buffer
 */
 /**************************************************************************/

-void sspSend (uint8_t portNum, uint8_t *buf, uint32_t length)
+void sspSend (uint8_t portNum, uint8_t const *buf, uint32_t length)

 {
   uint32_t i;
   uint8_t Dummy = Dummy;
 {
   uint32_t i;
   uint8_t Dummy = Dummy;


@@ -297,3 +295,27 @@ void sspReceive(uint8_t portNum, uint8_t *buf, uint32_t length)
   return; 
 }
 
   return; 
 }
 

+void sspSendReceive(uint8_t portNum, uint8_t *buf, uint32_t length)
+{
+  uint32_t i;
+  uint8_t Dummy = Dummy;
+
+  if (portNum == 0)
+    {
+      for (i = 0; i < length; i++)
+       {
+         /* Move on only if NOT busy and TX FIFO not full. */
+         while ((SSP_SSP0SR & (SSP_SSP0SR_TNF_NOTFULL | SSP_SSP0SR_BSY_BUSY)) != SSP_SSP0SR_TNF_NOTFULL);
+         SSP_SSP0DR = *buf;
+  
+         while ( (SSP_SSP0SR & (SSP_SSP0SR_BSY_BUSY|SSP_SSP0SR_RNE_NOTEMPTY)) != SSP_SSP0SR_RNE_NOTEMPTY );
+         /* Whenever a byte is written, MISO FIFO counter increments, Clear FIFO 
+      on MISO. Otherwise, when SSP0Receive() is called, previous data byte
+      is left in the FIFO. */
+         *buf = SSP_SSP0DR;
+         buf++;
+       }
+    }
+
+  return; 
+}