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| Rev 378 | Rev 379 | ||
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| Line 117... | Line 117... | ||
| 117 | // |
117 | // |
| 118 | // |
118 | // |
| 119 | // Returnvalue: none |
119 | // Returnvalue: none |
| 120 | //________________________________________________________________________________________________________________________________________ |
120 | //________________________________________________________________________________________________________________________________________ |
| Line -... | Line 121... | ||
| - | 121 | ||
| - | 122 | void SSC_Speed(u32 speed) |
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| - | 123 | { |
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| - | 124 | SSP_InitTypeDef SSP_InitStructure; |
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| - | 125 | ||
| - | 126 | SSP_Cmd(SSP1, DISABLE); |
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| - | 127 | SSP_DeInit(SSP1); |
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| - | 128 | SSP_StructInit(&SSP_InitStructure); |
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| - | 129 | SSP_InitStructure.SSP_FrameFormat = SSP_FrameFormat_Motorola; |
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| - | 130 | SSP_InitStructure.SSP_Mode = SSP_Mode_Master; |
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| - | 131 | SSP_InitStructure.SSP_CPHA = SSP_CPHA_1Edge; |
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| - | 132 | SSP_InitStructure.SSP_CPOL = SSP_CPOL_Low; |
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| - | 133 | // Set Baud Rate (Prescaler) |
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| - | 134 | // bit rate is BRCLK/SSP_ClockPrescaler/(1+SSP_ClockRate)) |
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| - | 135 | // With MSCLK = 48MHz = BRCLK we get for the SPICLK = 48Mhz / 20 / (1+5) = 400 kHz |
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| - | 136 | SSP_InitStructure.SSP_ClockRate = 5; //5 |
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| - | 137 | SSP_InitStructure.SSP_ClockPrescaler = (48000 / (5+1)) / speed; |
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| - | 138 | SSP_Init(SSP1, &SSP_InitStructure); |
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| - | 139 | SSP_Cmd(SSP1, ENABLE); |
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| - | 140 | } |
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| - | 141 | ||
| 121 | 142 | ||
| 122 | void SSC_Init(void) |
143 | void SSC_Init(void) |
| 123 | { |
144 | { |
| 124 | GPIO_InitTypeDef GPIO_InitStructure; |
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| 125 | SSP_InitTypeDef SSP_InitStructure; |
145 | GPIO_InitTypeDef GPIO_InitStructure; |
| 126 | // WIU_InitTypeDef WIU_InitStructure; |
146 | // WIU_InitTypeDef WIU_InitStructure; |
| 127 | // enable APB clock for SPI1 |
147 | // enable APB clock for SPI1 |
| 128 | SCU_APBPeriphClockConfig(__SSP1 ,ENABLE); |
148 | SCU_APBPeriphClockConfig(__SSP1 ,ENABLE); |
| 129 | // configure P5.4 -> SD-CS as an output pin |
149 | // configure P5.4 -> SD-CS as an output pin |
| Line 149... | Line 169... | ||
| 149 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
169 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
| 150 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Enable; |
170 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Enable; |
| 151 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
171 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
| 152 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
172 | GPIO_Init (GPIO3, &GPIO_InitStructure); |
| 153 | // configure SPI1 |
173 | // configure SPI1 |
| 154 | SSP_DeInit(SSP1); |
174 | SSC_Speed(400); |
| 155 | SSP_StructInit(&SSP_InitStructure); |
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| 156 | SSP_InitStructure.SSP_FrameFormat = SSP_FrameFormat_Motorola; |
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| 157 | SSP_InitStructure.SSP_Mode = SSP_Mode_Master; |
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| 158 | SSP_InitStructure.SSP_CPHA = SSP_CPHA_1Edge; |
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| 159 | SSP_InitStructure.SSP_CPOL = SSP_CPOL_Low; |
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| 160 | // Set Baud Rate (Prescaler) |
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| 161 | // bit rate is BRCLK/SSP_ClockPrescaler/(1+SSP_ClockRate)) |
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| 162 | // With MSCLK = 48MHz/2 = BRCLK we get for the SPICLK = 24Mhz / 8 / (1+5) = 500 kHz |
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| 163 | SSP_InitStructure.SSP_ClockRate = 5; //5 |
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| 164 | SSP_InitStructure.SSP_ClockPrescaler = 4; //8 |
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| 165 | SSP_Init(SSP1, &SSP_InitStructure); |
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| 166 | SSC_Disable(); |
175 | SSC_Disable(); |
| 167 | SSP_Cmd(SSP1, ENABLE); |
176 | SSP_Cmd(SSP1, ENABLE); |
| Line 168... | Line 177... | ||
| 168 | 177 | ||