From f7a1d2e9cdbb4f4d4f0c7712803d5abd34f55763 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@mur.at>
Date: Thu, 31 May 2012 21:32:20 +0000
Subject: some timing test for idm communication (not working yet - hardware
 probs?)

git-svn-id: https://svn.spreadspace.org/mur.sat@501 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 software/idm-test/idm-test.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'software/idm-test/idm-test.c')

diff --git a/software/idm-test/idm-test.c b/software/idm-test/idm-test.c
index 0de977f..c72ab91 100644
--- a/software/idm-test/idm-test.c
+++ b/software/idm-test/idm-test.c
@@ -43,7 +43,7 @@
 
     /* Global I/O Buffers: */
 static RingBuffer_t SPItoUSB_Buffer;
-static uint8_t      SPItoUSB_Buffer_Data[128];
+static uint8_t      SPItoUSB_Buffer_Data[8];
 
 /** LUFA CDC Class driver interface configuration and state information. This structure is
  *  passed to all CDC Class driver functions, so that multiple instances of the same class
@@ -104,7 +104,7 @@ void SetupHardware(void)
 
   TCCR0B = (1 << CS02);
 
-  SPI_Init(SPI_SPEED_FCPU_DIV_4  | SPI_MODE_MASTER | SPI_ORDER_MSB_FIRST | 
+  SPI_Init(SPI_SPEED_FCPU_DIV_16  | SPI_MODE_MASTER | SPI_ORDER_MSB_FIRST | 
            SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING);
   SPI_CS_DDR |= (1<<CS);
   SPI_CS_PORT |= (1<<CS);
@@ -129,17 +129,21 @@ void IDM_ReadData(void)
 {
   led_on();
   SPI_CS_PORT &= ~(1<<CS);
+  _delay_us(100);
 
   SPI_SendByte('r');
+  _delay_us(50);
   uint8_t int_state = (INT_PIN & (1<<INT));
   while(!int_state) {
     uint8_t ReceivedByte = SPI_ReceiveByte();
     RingBuffer_Insert(&SPItoUSB_Buffer, ReceivedByte);
     if(RingBuffer_IsFull(&SPItoUSB_Buffer))
       break;
+    _delay_us(30);
     int_state = (INT_PIN & (1<<INT));
   }
 
+  _delay_us(100);
   SPI_CS_PORT |= (1<<CS);
   led_off();
 }
-- 
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