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41 ingob 1
/*#######################################################################################*/
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/* !!! THIS IS NOT FREE SOFTWARE !!!                                                     */
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/*#######################################################################################*/
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Copyright (c) 2008 Ingo Busker, Holger Buss
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// + Nur für den privaten Gebrauch / NON-COMMERCIAL USE ONLY
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// + FOR NON COMMERCIAL USE ONLY
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// + www.MikroKopter.com
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
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// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.
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// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
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// + bzgl. der Nutzungsbedingungen aufzunehmen.
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// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
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// + Verkauf von Luftbildaufnahmen, usw.
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
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// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
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// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
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// + eindeutig als Ursprung verlinkt werden
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
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// + Benutzung auf eigene Gefahr
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// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Die Portierung oder Nutzung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
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// + mit unserer Zustimmung zulässig
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
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// + this list of conditions and the following disclaimer.
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// +   * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived
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// +     from this software without specific prior written permission.
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// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permitted
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// +     for non-commercial use (directly or indirectly)
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// +     Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
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// +     with our written permission
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// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
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// +     clearly linked as origin
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// +   * porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed
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//
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// +  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// +  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// +  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// +  POSSIBILITY OF SUCH DAMAGE.
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//#include <stdio.h>
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#include "91x_lib.h"
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#include "uart1.h"
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/********************************************************/
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/*                  Initialize UART2                    */
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/********************************************************/
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void UART2_Init(void)
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{
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    UART_InitTypeDef UART_InitStructure;
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        GPIO_InitTypeDef GPIO_InitStructure;
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        SerialPutString("\r\n UART2 init...");
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        SCU_APBPeriphClockConfig(__UART2, ENABLE);  // Enable the UART2 Clock
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        SCU_APBPeriphClockConfig(__GPIO5, ENABLE);  // Enable the GPIO5 Clock
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    /*Configure UART2_Rx pin GPIO5.2*/
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        GPIO_StructInit(&GPIO_InitStructure);
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        GPIO_InitStructure.GPIO_Direction =     GPIO_PinInput;
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    GPIO_InitStructure.GPIO_Pin =                       GPIO_Pin_2;
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    GPIO_InitStructure.GPIO_Type =                      GPIO_Type_PushPull;
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    GPIO_InitStructure.GPIO_IPConnected =       GPIO_IPConnected_Enable;
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    GPIO_InitStructure.GPIO_Alternate =         GPIO_InputAlt1; // UART2_RxD
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    GPIO_Init(GPIO5, &GPIO_InitStructure);
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        SCU_APBPeriphClockConfig(__GPIO3, ENABLE);  // Enable the GPIO3 Clock
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    /*Configure UART2_Tx pin GPIO3.0*/
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        GPIO_StructInit(&GPIO_InitStructure);
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        GPIO_InitStructure.GPIO_Direction =     GPIO_PinOutput;
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    GPIO_InitStructure.GPIO_Pin =                       GPIO_Pin_0;
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    GPIO_InitStructure.GPIO_Type =                      GPIO_Type_PushPull;
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    GPIO_InitStructure.GPIO_Alternate =         GPIO_OutputAlt2; // UART2_TX
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    GPIO_Init(GPIO3, &GPIO_InitStructure);
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        /* UART2 configured as follow:
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          - Word Length = 8 Bits
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          - One Stop Bit
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          - No parity
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          - BaudRate = 57600 baud
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          - Hardware flow control Disabled
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          - Receive and transmit enabled
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          - Receive and transmit FIFOs are Disabled
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    */
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        UART_StructInit(&UART_InitStructure);
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    UART_InitStructure.UART_WordLength =                        UART_WordLength_8D;
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    UART_InitStructure.UART_StopBits =                          UART_StopBits_1;
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    UART_InitStructure.UART_Parity =                            UART_Parity_No ;
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    UART_InitStructure.UART_BaudRate =                          BAUD_RATE;
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    UART_InitStructure.UART_HardwareFlowControl =       UART_HardwareFlowControl_None;
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    UART_InitStructure.UART_Mode =                                      UART_Mode_Tx_Rx;
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    UART_InitStructure.UART_FIFO =                                      UART_FIFO_Enable;
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    UART_InitStructure.UART_TxFIFOLevel =                       UART_FIFOLevel_1_2;
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    UART_InitStructure.UART_RxFIFOLevel =                       UART_FIFOLevel_1_2;
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        UART_DeInit(UART2);     // reset uart 2 to default
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    UART_Init(UART2, &UART_InitStructure);  // initialize uart 2
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        // enable uart 2 interrupts selective
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    UART_ITConfig(UART2, UART_IT_Receive | UART_IT_ReceiveTimeOut, ENABLE);
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        UART_Cmd(UART2, ENABLE); // enable uart 2
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        // configure the uart 2 interupt line as an IRQ with priority 9 (0 is highest)
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        VIC_Config(UART2_ITLine, VIC_IRQ, 9);
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        // enable the uart 2 IRQ
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        VIC_ITCmd(UART2_ITLine, ENABLE);
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        SerialPutString("ok");
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}
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void UART2_Deinit(void)
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{
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        GPIO_InitTypeDef GPIO_InitStructure;
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        SerialPutString("\r\n UART2 deinit...");
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        VIC_ITCmd(UART2_ITLine, DISABLE); // disable the uart 2 IRQ
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        UART_Cmd(UART2, DISABLE); // disable uart 2
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        UART_DeInit(UART2);     // reset uart 0 to default
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        SCU_APBPeriphClockConfig(__UART2, DISABLE);  // disable the UART2 Clock
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        SCU_APBPeriphClockConfig(__GPIO5, ENABLE);
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        // unmap UART2 from FC
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        // set port pin 5.2 (serial data from FC) to input and disconnect from IP
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        GPIO_StructInit(&GPIO_InitStructure);
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        GPIO_InitStructure.GPIO_Direction =     GPIO_PinInput;
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    GPIO_InitStructure.GPIO_Pin =                       GPIO_Pin_2;
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    GPIO_InitStructure.GPIO_Type =                      GPIO_Type_PushPull;
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    GPIO_InitStructure.GPIO_IPConnected =       GPIO_IPConnected_Disable;
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    GPIO_InitStructure.GPIO_Alternate =         GPIO_InputAlt1;
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    GPIO_Init(GPIO5, &GPIO_InitStructure);
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        SCU_APBPeriphClockConfig(__GPIO3, ENABLE);
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        // set port pin 3.0 (serial data to FC) to input and disconnect from IP
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        GPIO_StructInit(&GPIO_InitStructure);
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        GPIO_InitStructure.GPIO_Direction =     GPIO_PinInput;
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    GPIO_InitStructure.GPIO_Pin =                       GPIO_Pin_0;
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    GPIO_InitStructure.GPIO_Type =                      GPIO_Type_PushPull;
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        GPIO_InitStructure.GPIO_IPConnected =   GPIO_IPConnected_Disable;
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    GPIO_InitStructure.GPIO_Alternate =         GPIO_InputAlt1;
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    GPIO_Init(GPIO3, &GPIO_InitStructure);
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        SerialPutString("ok");
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}
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/********************************************************/
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/*            UART2 Interrupt Handler                   */
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/********************************************************/
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void UART2_IRQHandler(void)
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{
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        // if receive irq or receive timeout irq has occured
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        if((UART_GetITStatus(UART2, UART_IT_Receive) != RESET) || (UART_GetITStatus(UART2, UART_IT_ReceiveTimeOut) != RESET) )
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        {
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                UART_ClearITPendingBit(UART2, UART_IT_Receive);                 // clear receive interrupt flag
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                UART_ClearITPendingBit(UART2, UART_IT_ReceiveTimeOut);  // clear receive timeout interrupt flag
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                // if debug UART is UART2
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                if (DebugUART == UART2)
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                {       // forward received data to the UART1 tx buffer
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                        while(UART_GetFlagStatus(UART2, UART_FLAG_RxFIFOEmpty) != SET)
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                        {
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                                // wait for space in the tx buffer of the UART1
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                                while(UART_GetFlagStatus(UART1, UART_FLAG_TxFIFOFull) == SET) {};
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                                // move the byte from the rx buffer of UART2 to the tx buffer of UART1
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                                UART_SendData(UART1, UART_ReceiveData(UART2));
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                        }
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                }
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                else
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                {
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                        // ignore serial data from the FC
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                        while(UART_GetFlagStatus(UART2, UART_FLAG_RxFIFOEmpty) != SET)
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                        UART_ReceiveData(UART2);
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                }
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        } // eof receive irq or receive timeout irq
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}