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1 | ingob | 1 | /*#######################################################################################*/ |
2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
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3 | /*#######################################################################################*/ |
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4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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5 | // + Copyright (c) 2008 Ingo Busker, Holger Buss |
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6 | // + Nur für den privaten Gebrauch |
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7 | // + FOR NON COMMERCIAL USE ONLY |
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8 | // + www.MikroKopter.com |
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9 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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10 | // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
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11 | // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
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12 | // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
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13 | // + bzgl. der Nutzungsbedingungen aufzunehmen. |
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14 | // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
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15 | // + Verkauf von Luftbildaufnahmen, usw. |
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16 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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17 | // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
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18 | // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
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19 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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20 | // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
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21 | // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
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22 | // + eindeutig als Ursprung verlinkt werden |
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23 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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24 | // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
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25 | // + Benutzung auf eigene Gefahr |
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26 | // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
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27 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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28 | // + Die PORTIERUNG der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
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29 | // + mit unserer Zustimmung zulässig |
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30 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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31 | // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
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32 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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33 | // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
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34 | // + this list of conditions and the following disclaimer. |
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35 | // + * 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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36 | // + from this software without specific prior written permission. |
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37 | // + * The use of this project (hardware, software, binary files, sources and documentation) is only permitted |
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38 | // + for non-commercial use (directly or indirectly) |
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39 | // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
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40 | // + with our written permission |
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41 | // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
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42 | // + clearly linked as origin |
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43 | // + * PORTING this software (or part of it) to systems (other than hardware from www.mikrokopter.de) is NOT allowed |
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44 | // |
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45 | // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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46 | // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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47 | // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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48 | // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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49 | // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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50 | // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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51 | // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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52 | // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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53 | // + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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54 | // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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55 | // + POSSIBILITY OF SUCH DAMAGE. |
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56 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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24 | StephanB | 57 | #include "91x_lib.h" |
1 | ingob | 58 | |
59 | //________________________________________________________________________________________________________________________________________ |
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24 | StephanB | 60 | // Module name: ssc.c |
1 | ingob | 61 | // Compiler used: avr-gcc 3.4.5 |
62 | // Last Modifikation: 24.07.2007 |
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63 | // Version: 1.02 |
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64 | // Authors: Stephan Busker |
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65 | // Description: Source files for access to the synchrnous serial channel. |
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66 | // Copyright (C) 2007 Stephan Busker |
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67 | //........................................................................................................................................ |
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24 | StephanB | 68 | // ext. Functions: extern void SSC_Init(void); |
69 | // extern u8 SSC_GetChar (void); |
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1 | ingob | 70 | // extern void SSC_PutChar (u8 Byte); |
71 | // extern void SSC_Disable(void); |
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72 | // extern void SSC_Enable(void); |
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24 | StephanB | 73 | // extern void SSC_ClearRxFifo(); |
1 | ingob | 74 | //........................................................................................................................................ |
75 | // URL: www.Mikro-Control.de |
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76 | // mailto: stephan.busker@mikro-control.de |
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77 | //________________________________________________________________________________________________________________________________________ |
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78 | |||
79 | |||
80 | |||
24 | StephanB | 81 | //________________________________________________________________________________________________________________________________________ |
82 | // Function: SSC_Enable(void); |
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83 | // |
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84 | // Description: This function enables chipselect of the sdcard (active low) |
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85 | // |
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86 | // |
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87 | // Returnvalue: none |
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88 | //________________________________________________________________________________________________________________________________________ |
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1 | ingob | 89 | |
24 | StephanB | 90 | void SSC_Enable(void) |
91 | { |
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92 | // enable chipselect of the sd-card (P5.4 -> SD-CS, active low). |
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93 | GPIO_WriteBit(GPIO5, GPIO_Pin_4 , Bit_RESET); |
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94 | } |
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95 | |||
1 | ingob | 96 | //________________________________________________________________________________________________________________________________________ |
24 | StephanB | 97 | // Function: SSC_Disable(void); |
1 | ingob | 98 | // |
24 | StephanB | 99 | // Description: This function disables chipselect of the sdcard (active low) |
100 | // |
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101 | // |
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102 | // Returnvalue: none |
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103 | //________________________________________________________________________________________________________________________________________ |
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104 | |||
105 | void SSC_Disable(void) |
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106 | { |
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107 | // disable chipselect of the sd-card (P5.4 -> SD-CS, active low). |
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108 | GPIO_WriteBit(GPIO5, GPIO_Pin_4 , Bit_SET); |
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109 | } |
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110 | |||
111 | |||
112 | //________________________________________________________________________________________________________________________________________ |
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113 | // Function: SSC_Init(void); |
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114 | // |
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1 | ingob | 115 | // Description: This function initialises the synchronus serial channel to the sdcard. |
116 | // |
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117 | // |
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118 | // Returnvalue: none |
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119 | //________________________________________________________________________________________________________________________________________ |
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120 | |||
121 | void SSC_Init(void) |
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122 | { |
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24 | StephanB | 123 | GPIO_InitTypeDef GPIO_InitStructure; |
124 | SSP_InitTypeDef SSP_InitStructure; |
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125 | WIU_InitTypeDef WIU_InitStructure; |
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126 | // enable APB clock for SPI1 |
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127 | SCU_APBPeriphClockConfig(__SSP1 ,ENABLE); |
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128 | // configure P5.4 -> SD-CS as an output pin |
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129 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
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130 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; |
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131 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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132 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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133 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1; |
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134 | GPIO_Init (GPIO5, &GPIO_InitStructure); |
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135 | // configure P3.4 -> SCK1 and P3.6 -> MOSI1 as an output pin |
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136 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
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137 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6; |
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138 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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139 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable; |
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140 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2; |
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141 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
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142 | // configure P3.5 <- MISO1 as an input pin |
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143 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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144 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; |
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145 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
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146 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable; |
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147 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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148 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
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149 | // configure SPI1 |
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150 | SSP_DeInit(SSP1); |
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151 | SSP_StructInit(&SSP_InitStructure); |
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152 | SSP_InitStructure.SSP_FrameFormat = SSP_FrameFormat_Motorola; |
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153 | SSP_InitStructure.SSP_Mode = SSP_Mode_Master; |
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154 | SSP_InitStructure.SSP_CPHA = SSP_CPHA_1Edge; |
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155 | SSP_InitStructure.SSP_CPOL = SSP_CPOL_Low; |
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156 | // Set Baud Rate (Prescaler) |
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157 | // bit rate is BRCLK/SSP_ClockPrescaler/(1+SSP_ClockRate)) |
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158 | // With MSCLK = 48MHz/2 = BRCLK we get for the SPICLK = 24Mhz / 8 / (1+5) = 500 kHz |
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159 | SSP_InitStructure.SSP_ClockRate = 14; //5 |
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160 | SSP_InitStructure.SSP_ClockPrescaler = 8; |
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161 | SSP_Init(SSP1, &SSP_InitStructure); |
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162 | SSC_Disable(); |
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163 | SSP_Cmd(SSP1, ENABLE); |
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1 | ingob | 164 | |
24 | StephanB | 165 | // Configure SD_SWITCH at pin GPIO5.3 as an external irq 11 |
1 | ingob | 166 | |
24 | StephanB | 167 | // configure the port |
168 | SCU_APBPeriphClockConfig(__GPIO5, ENABLE); // Enable the GPIO5 Clock |
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169 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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170 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; |
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171 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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172 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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173 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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174 | GPIO_Init(GPIO5, &GPIO_InitStructure); |
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175 | |||
176 | // configure the EXT11 interrupt line (P5.3) as an IRQ with the lowest priority |
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177 | SCU_APBPeriphClockConfig(__WIU, ENABLE); |
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178 | WIU_Cmd(ENABLE ); |
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179 | WIU_ClearITPendingBit(WIU_Line11); |
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180 | WIU_DeInit(); |
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181 | WIU_InitStructure.WIU_TriggerEdge = WIU_FallingEdge; |
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182 | WIU_InitStructure.WIU_Line = WIU_Line11; |
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183 | WIU_Init(&WIU_InitStructure); |
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184 | // The EXTIT1_IRQHandler() is called every time the SD-Switch is activated (falling edge) |
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185 | // by inserting an sd-card |
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186 | SCU_WakeUpLineConfig(11); |
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187 | VIC_Config(EXTIT1_ITLine, VIC_IRQ, 7); |
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188 | VIC_ITCmd(EXTIT1_ITLine, ENABLE); |
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189 | } |
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1 | ingob | 190 | |
24 | StephanB | 191 | void SSC_Deinit(void) |
192 | { |
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193 | GPIO_InitTypeDef GPIO_InitStructure; |
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1 | ingob | 194 | |
24 | StephanB | 195 | SSP_Cmd(SSP1, DISABLE); |
196 | SSP_DeInit(SSP1); |
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1 | ingob | 197 | |
24 | StephanB | 198 | // configure P5.4 -> SD-CS as an input pin |
199 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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200 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; |
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201 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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202 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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203 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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204 | GPIO_Init (GPIO5, &GPIO_InitStructure); |
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205 | // configure P3.4 -> SCK1 and P3.6 -> MOSI1 as an input pin |
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206 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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207 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6; |
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208 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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209 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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210 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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211 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
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212 | // configure P3.5 <- MISO1 as an input pin |
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213 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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214 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; |
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215 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
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216 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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217 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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218 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
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219 | |||
220 | // disable APB clock for SPI1 |
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221 | SCU_APBPeriphClockConfig(__SSP1 ,DISABLE); |
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222 | |||
223 | // configure the port of the SDC-Switch |
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224 | SCU_APBPeriphClockConfig(__GPIO5, ENABLE); // Enable the GPIO5 Clock |
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225 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
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226 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; |
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227 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; |
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228 | GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Disable; |
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229 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
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230 | GPIO_Init(GPIO5, &GPIO_InitStructure); |
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1 | ingob | 231 | } |
232 | |||
233 | |||
234 | //________________________________________________________________________________________________________________________________________ |
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24 | StephanB | 235 | // Function: SSC_GetChar(void); |
1 | ingob | 236 | // |
237 | // Description: This function reads one byte from the SSC |
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238 | // |
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239 | // |
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240 | // Returnvalue: the byte received. |
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241 | //________________________________________________________________________________________________________________________________________ |
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242 | |||
243 | u8 SSC_GetChar (void) |
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244 | { |
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245 | u8 Byte = 0; |
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24 | StephanB | 246 | while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoNotFull) != SET); // wait for space in the tx fifo |
247 | SSP_SendData(SSP1, 0xFF);// send dymmy byte (0xFF) as master to receive a byte from the slave |
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248 | while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoEmpty) != SET); // wait for the byte to be sent |
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249 | Byte = SSP_ReceiveData(SSP1); // read the byte transmitted from the slave |
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1 | ingob | 250 | return (Byte); |
251 | } |
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252 | |||
253 | //________________________________________________________________________________________________________________________________________ |
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254 | void SSC_ClearRxFifo (void) |
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255 | { |
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24 | StephanB | 256 | // wait that the tx fifo is empty |
1 | ingob | 257 | while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoEmpty) != SET); |
24 | StephanB | 258 | // then empty the rx fifo by reading all the bytes that are available |
1 | ingob | 259 | while(SSP_GetFlagStatus(SSP1, SSP_FLAG_RxFifoNotEmpty) == SET) SSP_ReceiveData(SSP1); |
260 | } |
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261 | //________________________________________________________________________________________________________________________________________ |
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24 | StephanB | 262 | // Function: SSC_PutChar(u8 Byte); |
1 | ingob | 263 | // |
264 | // Description: This function writes one byte to the SSC |
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265 | // |
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266 | // |
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267 | // Returnvalue: none |
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268 | //________________________________________________________________________________________________________________________________________ |
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269 | |||
270 | void SSC_PutChar (u8 Byte) |
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271 | { |
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24 | StephanB | 272 | // wait for some space in the tx fifo |
1 | ingob | 273 | while(SSP_GetFlagStatus(SSP1, SSP_FLAG_TxFifoNotFull) != SET); |
24 | StephanB | 274 | // put the byte to send in the tx fifo |
1 | ingob | 275 | SSP_SendData(SSP1, Byte); |
276 | } |
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277 | |||
278 | |||
279 | |||
280 | |||
281 | |||
282 | |||
283 | |||
284 |