Subversion Repositories NaviCtrl

Compare Revisions

Ignore whitespace Rev 41 → Rev 72

/tags/V0.14b/ssc.c
0,0 → 1,287
/*#######################################################################################*/
/* !!! THIS IS NOT FREE SOFTWARE !!! */
/*#######################################################################################*/
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Copyright (c) 2008 Ingo Busker, Holger Buss
// + Nur für den privaten Gebrauch
// + FOR NON COMMERCIAL USE ONLY
// + www.MikroKopter.com
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.
// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
// + bzgl. der Nutzungsbedingungen aufzunehmen.
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
// + Verkauf von Luftbildaufnahmen, usw.
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
// + eindeutig als Ursprung verlinkt werden
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
// + Benutzung auf eigene Gefahr
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Die PORTIERUNG der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
// + mit unserer Zustimmung zulässig
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
// + this list of conditions and the following disclaimer.
// + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived
// + from this software without specific prior written permission.
// + * The use of this project (hardware, software, binary files, sources and documentation) is only permitted
// + for non-commercial use (directly or indirectly)
// + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
// + with our written permission
// + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
// + clearly linked as origin
// + * PORTING this software (or part of it) to systems (other than hardware from www.mikrokopter.de) is NOT allowed
//
// + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// + POSSIBILITY OF SUCH DAMAGE.
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#include "91x_lib.h"
 
//________________________________________________________________________________________________________________________________________
// Module name: ssc.c
// Compiler used: avr-gcc 3.4.5
// Last Modifikation: 24.07.2007
// Version: 1.02
// Authors: Stephan Busker
// Description: Source files for access to the synchrnous serial channel.
// Copyright (C) 2007 Stephan Busker
//........................................................................................................................................
// ext. Functions: extern void SSC_Init(void);
// extern u8 SSC_GetChar (void);
// extern void SSC_PutChar (u8 Byte);
// extern void SSC_Disable(void);
// extern void SSC_Enable(void);
// extern void SSC_ClearRxFifo();
//........................................................................................................................................
// URL: www.Mikro-Control.de
// mailto: stephan.busker@mikro-control.de
//________________________________________________________________________________________________________________________________________
 
 
 
//________________________________________________________________________________________________________________________________________
// Function: SSC_Enable(void);
//
// Description: This function enables chipselect of the sdcard (active low)
//
//
// Returnvalue: none
//________________________________________________________________________________________________________________________________________
 
void SSC_Enable(void)
{
// enable chipselect of the sd-card (P5.4 -> SD-CS, active low).
GPIO_WriteBit(GPIO5, GPIO_Pin_4 , Bit_RESET);
}
//________________________________________________________________________________________________________________________________________
// Function: SSC_Disable(void);
//
// Description: This function disables chipselect of the sdcard (active low)
//
//
// Returnvalue: none
//________________________________________________________________________________________________________________________________________
 
void SSC_Disable(void)
{
// disable chipselect of the sd-card (P5.4 -> SD-CS, active low).
GPIO_WriteBit(GPIO5, GPIO_Pin_4 , Bit_SET);
}
 
 
//________________________________________________________________________________________________________________________________________
// Function: SSC_Init(void);
//
// Description: This function initialises the synchronus serial channel to the sdcard.
//
//
// Returnvalue: none
//________________________________________________________________________________________________________________________________________
 
void SSC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SSP_InitTypeDef SSP_InitStructure;
WIU_InitTypeDef WIU_InitStructure;
// enable APB clock for SPI1
SCU_APBPeriphClockConfig(__SSP1 ,ENABLE);
// configure P5.4 -> SD-CS as an output pin
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1;
GPIO_Init (GPIO5, &GPIO_InitStructure);
// configure P3.4 -> SCK1 and P3.6 -> MOSI1 as an output pin
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable;
GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2;
GPIO_Init (GPIO3, &GPIO_InitStructure);
// configure P3.5 <- MISO1 as an input pin
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init (GPIO3, &GPIO_InitStructure);
// configure SPI1
SSP_DeInit(SSP1);
SSP_StructInit(&SSP_InitStructure);
SSP_InitStructure.SSP_FrameFormat = SSP_FrameFormat_Motorola;
SSP_InitStructure.SSP_Mode = SSP_Mode_Master;
SSP_InitStructure.SSP_CPHA = SSP_CPHA_1Edge;
SSP_InitStructure.SSP_CPOL = SSP_CPOL_Low;
// Set Baud Rate (Prescaler)
// bit rate is BRCLK/SSP_ClockPrescaler/(1+SSP_ClockRate))
// With MSCLK = 48MHz/2 = BRCLK we get for the SPICLK = 24Mhz / 8 / (1+5) = 500 kHz
SSP_InitStructure.SSP_ClockRate = 5; //5
SSP_InitStructure.SSP_ClockPrescaler = 8;
SSP_Init(SSP1, &SSP_InitStructure);
SSC_Disable();
SSP_Cmd(SSP1, ENABLE);
 
// Configure SD_SWITCH at pin GPIO5.3 as an external irq 11
 
// configure the port
SCU_APBPeriphClockConfig(__GPIO5, ENABLE); // Enable the GPIO5 Clock
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init(GPIO5, &GPIO_InitStructure);
// configure the EXT11 interrupt line (P5.3) as an IRQ with the lowest priority
SCU_APBPeriphClockConfig(__WIU, ENABLE);
WIU_Cmd(ENABLE );
WIU_ClearITPendingBit(WIU_Line11);
WIU_DeInit();
WIU_InitStructure.WIU_TriggerEdge = WIU_FallingEdge;
WIU_InitStructure.WIU_Line = WIU_Line11;
WIU_Init(&WIU_InitStructure);
// The EXTIT1_IRQHandler() is called every time the SD-Switch is activated (falling edge)
// by inserting an sd-card
SCU_WakeUpLineConfig(11);
VIC_Config(EXTIT1_ITLine, VIC_IRQ, 7);
VIC_ITCmd(EXTIT1_ITLine, ENABLE);
}
 
void SSC_Deinit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
 
SSP_Cmd(SSP1, DISABLE);
SSP_DeInit(SSP1);
 
// configure P5.4 -> SD-CS as an input pin
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init (GPIO5, &GPIO_InitStructure);
// configure P3.4 -> SCK1 and P3.6 -> MOSI1 as an input pin
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init (GPIO3, &GPIO_InitStructure);
// configure P3.5 <- MISO1 as an input pin
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init (GPIO3, &GPIO_InitStructure);
 
// disable APB clock for SPI1
SCU_APBPeriphClockConfig(__SSP1 ,DISABLE);
 
// configure the port of the SDC-Switch
SCU_APBPeriphClockConfig(__GPIO5, ENABLE); // Enable the GPIO5 Clock
GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1;
GPIO_Init(GPIO5, &GPIO_InitStructure);
}
 
 
//________________________________________________________________________________________________________________________________________
// Function: SSC_GetChar(void);
//
// Description: This function reads one byte from the SSC
//
//
// Returnvalue: the byte received.
//________________________________________________________________________________________________________________________________________
 
u8 SSC_GetChar (void)
{
u8 Byte = 0;
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoNotFull) != SET); // wait for space in the tx fifo
SSP_SendData(SSP1, 0xFF);// send dymmy byte (0xFF) as master to receive a byte from the slave
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoEmpty) != SET); // wait for the byte to be sent
Byte = SSP_ReceiveData(SSP1); // read the byte transmitted from the slave
return (Byte);
}
 
//________________________________________________________________________________________________________________________________________
void SSC_ClearRxFifo (void)
{
// wait that the tx fifo is empty
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoEmpty) != SET);
// then empty the rx fifo by reading all the bytes that are available
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_RxFifoNotEmpty) == SET) SSP_ReceiveData(SSP1);
}
//________________________________________________________________________________________________________________________________________
// Function: SSC_PutChar(u8 Byte);
//
// Description: This function writes one byte to the SSC
//
//
// Returnvalue: none
//________________________________________________________________________________________________________________________________________
 
void SSC_PutChar (u8 Byte)
{
// wait for some space in the tx fifo
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoNotFull) != SET);
// put the byte to send in the tx fifo
SSP_SendData(SSP1, Byte);
}