1 | /***************************************************************** |
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2 | * File: w3_clock_controller.c |
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3 | * Copyright (c) 2012 Mango Communications, all rights reseved |
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4 | * Released under the WARP License |
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5 | * See http://warp.rice.edu/license for details |
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6 | *****************************************************************/ |
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7 | |
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8 | /** \file w3_clock_controller.c |
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9 | |
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10 | \mainpage |
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11 | This is the driver for the w3_clock_controller core, which implements an SPI master for controlling |
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12 | the AD9512 clock buffers on the WARP v3 board. Refer to the WARP v3 user guide for more details |
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13 | on the clock options and connections. |
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14 | |
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15 | @version 3.00.b |
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16 | @author Patrick Murphy |
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17 | @copyright (c) 2012 Mango Communications, Inc. All rights reserved.<br> |
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18 | Released under the WARP open source license (see http://warp.rice.edu/license) |
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19 | |
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20 | */ |
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21 | |
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22 | #include "w3_clock_controller.h" |
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23 | |
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24 | /** |
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25 | \defgroup user_functions Functions |
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26 | \brief Functions to call from user code |
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27 | \addtogroup user_functions |
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28 | |
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29 | Example: |
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30 | \code{.c} |
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31 | //Assumes user code sets CLK_BASEADDR to base address of w3_clock_controller core, as set in xparameters.h |
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32 | |
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33 | //Initialize the AD9512 clock buffers |
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34 | ad_init(CLK_BASEADDR, 3); |
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35 | |
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36 | //Enable clock outputs to FMC slot |
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37 | clk_config_outputs(CLK_BASEADDR, CLK_OUTPUT_ON, (CLK_SAMP_OUTSEL_FMC | CLK_RFREF_OUTSEL_FMC)); |
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38 | |
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39 | //Disable clock outputs to clock module header |
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40 | clk_config_outputs(CLK_BASEADDR, CLK_OUTPUT_OFF, (CLK_SAMP_OUTSEL_CLKMODHDR | CLK_RFREF_OUTSEL_CLKMODHDR)); |
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41 | |
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42 | //Set clock to AD chips to 40MHz (80MHz source divided by 2) |
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43 | clk_config_dividers(CLK_BASEADDR, 2, (CLK_SAMP_OUTSEL_AD_RFA | CLK_SAMP_OUTSEL_AD_RFB)); |
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44 | |
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45 | \endcode |
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46 | |
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47 | @{ |
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48 | */ |
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49 | |
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50 | /** |
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51 | \brief Initializes the clock controller. This function must be called once at boot before any AD or |
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52 | RF operations will work. Default config is: |
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53 | - On board 80MHz TCXO used as source for sampling and RF ref clock buffers |
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54 | - 80MHz clock driven to FPGA, RF A and RF B ADC/DACs |
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55 | - 40MHz clock driven to RF A and B transceivers |
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56 | - FMC and clock module header clocks disabled |
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57 | \param baseaddr Base memory address of w3_clock_controller pcore |
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58 | \param clkDiv Clock divider for SPI serial clock (set to 3 for 160MHz bus) |
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59 | */ |
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60 | int clk_init(u32 baseaddr, u8 clkDiv) { |
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61 | u32 x; |
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62 | |
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63 | Xil_Out32(baseaddr + CLKCTRL_REG_CONFIG, (clkDiv & CLKCTRL_REG_CONFIG_MASK_CLKDIV)); |
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64 | |
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65 | //Toggle AD9512 resets (active low) |
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66 | //Currently bypased-buffers auto-reset on power up, and resetting here can stop clock to FPGA (damn causality) |
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67 | //Xil_Out32(CLKCTRL_REG_CONFIG, 0); //Also sets clk_div = 0 |
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68 | //Xil_Out32(CLKCTRL_REG_CONFIG, CLKCTRL_REG_CONFIG_MASK_SAMP_FUNC | CLKCTRL_REG_CONFIG_MASK_RFREF_FUNC); |
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69 | |
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70 | //Confirm the SPI interfaces are working |
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71 | x = clk_spi_read(baseaddr, (CLK_SAMP_CS|CLK_RFREF_CS), 0x0); |
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72 | if(x != 0x1010) { |
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73 | xil_printf("First CLK SPI readback was wrong: addr[0]=0x%04x (should be 0x1010)\n", x); |
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74 | return -1; |
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75 | } |
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76 | |
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77 | /* Samping Clock Buffer Config |
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78 | Samp clock AD9512 outputs on WARP v3 board: |
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79 | OUT0: AD2 (LVPECL) |
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80 | OUT1: Clock module header (LVPECL) |
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81 | OUT2: AD1 (LVPECL) |
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82 | OUT3: FPGA col2 SRCC (LVDS) |
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83 | OUT4: FMC (LVDS) |
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84 | |
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85 | Default config: |
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86 | -Select CLK1 as input |
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87 | -Disable: |
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88 | -Outputs OUT1, OUT4 |
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89 | -All output dividers |
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90 | -CLK2 input |
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91 | */ |
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92 | |
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93 | /* |
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94 | reg 0x45: CLK1/CLK2 config: |
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95 | 0: 1=Use CLK1 input |
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96 | 1: 0=Enable CLK1 circuits |
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97 | 2: 1=Disable CLK2 circuits |
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98 | */ |
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99 | //Now hanlded by at-boot logic; C code shouldn't touch this register if the host processor |
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100 | // is clocked by the sampling clock |
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101 | //clk_spi_write(baseaddr, CLK_SAMP_CS, 0x45, 0x05); |
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102 | |
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103 | //Enable OUT0, OUT2, OUT3; disable OUT1, OUT4; all outputs are on after powerup/reset |
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104 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x3E, 0x02); //OUT1 = off (PD2 mode, because OUT1 has load resistors) |
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105 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x41, 0x01); //OUT4 = off |
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106 | |
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107 | //Power down divider logic- all active outputs at 80MHz |
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108 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4B, 0x80); //OUT0 divider off |
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109 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4D, 0x80); //OUT1 divider off |
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110 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4F, 0x80); //OUT2 divider off |
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111 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x51, 0x80); //OUT3 divider off |
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112 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x53, 0x80); //OUT4 divider off |
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113 | |
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114 | |
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115 | //Alternate config: 40MHz clock for AD1, AD2 |
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116 | // clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4B, 0x00); //OUT0 divider on |
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117 | // clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4A, 0x00); //OUT0 divide by 2 |
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118 | // clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4F, 0x00); //OUT2 divider on |
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119 | // clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4E, 0x00); //OUT2 divide by 2 |
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120 | |
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121 | //Trigger register update |
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122 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x5A, 0x01); //Self-clearing register update flag |
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123 | |
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124 | |
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125 | /* RF Reference Clock Buffer Config |
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126 | RF ref clock AD9512 outputs on WARP v3 board: |
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127 | OUT0: Clock module header (LVPECL) |
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128 | OUT1: NC |
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129 | OUT2: NC |
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130 | OUT3: Both MAX2829 ref (RFA=CMOSp, RFB=CMOSn; must be 20 or 40 MHz) |
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131 | OUT4: FMC (LVDS) |
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132 | |
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133 | Default config: |
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134 | -Select CLK1 as input |
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135 | -Enable + and - CMOS outputs on OUT3 |
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136 | -Set OUT3 divider to 2 (produces 40MHz clock at OUT3) |
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137 | -Disable: |
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138 | -Outputs OUT0, OUT1, OUT2, OUT4 |
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139 | -Dividers for OUT0, OUT1, OUT2, OUT4 |
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140 | -CLK2 input |
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141 | */ |
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142 | //Enable OUT3; Disable OUT0, OUT1, OUT2, OUT4; all outputs are on after reset |
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143 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x3D, 0x02); //OUT0 = off, has load resistors |
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144 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x3E, 0x03); //OUT1 = off, has no load resistors |
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145 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x3F, 0x03); //OUT2 = off, has no load resistors |
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146 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x41, 0x01); //OUT4 = off |
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147 | |
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148 | //Enable inverted CMOS output on OUT3 |
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149 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x40, 0x18); //OUT3 = CMOS, +/- both on |
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150 | |
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151 | //Power down CLK2 input |
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152 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x45, 0x05); //CLK1 on, CLK2 off, CLK1 drives distribution |
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153 | |
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154 | //Power down divider logic on disabled ports |
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155 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x4B, 0x80); //OUT0 divider off |
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156 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x4D, 0x80); //OUT1 divider off |
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157 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x4F, 0x80); //OUT2 divider off |
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158 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x53, 0x80); //OUT4 divider off |
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159 | |
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160 | //Set divider to 2 on OUT3 |
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161 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x50, 0x00); //OUT3 40MHz (1 cycle down) |
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162 | |
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163 | //Alternate config: 20MHz RF reference clock, OUT3 divider=4 |
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164 | // clk_spi_write(baseaddr, CLK_RFREF_CS, 0x50, 0x11); //OUT3 20MHz (2 cycle down) |
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165 | |
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166 | //Trigger register update |
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167 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x5A, 0x01); //Self-clearing register update flag |
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168 | |
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169 | return 0; |
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170 | } |
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171 | |
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172 | /** |
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173 | \brief Configures which outputs are en/disabled in both AD9512 clock buffers |
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174 | \param baseaddr Base memory address of w3_clock_controller pcore |
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175 | \param clkOutMode New mode for selected clock outputs; must be CLK_OUTPUT_ON or CLK_OUTPUT_OFF |
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176 | \param clkOutSel Masks to select which clock outputs to affect; must be OR'd combination of: |
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177 | Mask | Selected Output |
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178 | ---- | ---- |
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179 | CLK_SAMP_OUTSEL_FMC | Sampling clock buffer to FMC slot |
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180 | CLK_SAMP_OUTSEL_CLKMODHDR | Sampling clock buffer to clock module header |
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181 | CLK_SAMP_OUTSEL_FPGA | Sampling clock buffer to FPGA |
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182 | CLK_SAMP_OUTSEL_AD_RFA | Sampling clock buffer to RF A AD9963 (ADC/DAC ref clock) |
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183 | CLK_SAMP_OUTSEL_AD_RFB | Sampling clock buffer to RF B AD9963 (ADC/DAC ref clock) |
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184 | CLK_RFREF_OUTSEL_FMC | RF ref clock buffer to FMC |
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185 | CLK_RFREF_OUTSEL_CLKMODHDR | RF ref clock buffer to clock module header |
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186 | CLK_RFREF_OUTSEL_RFAB | RF ref clock buffer to RF A and B transceivers |
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187 | \return Returns 0 on success, -1 for invalid parameters |
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188 | */ |
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189 | int clk_config_outputs(u32 baseaddr, u8 clkOutMode, u32 clkOutSel) { |
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190 | if((clkOutMode != CLK_OUTPUT_ON) && (clkOutMode != CLK_OUTPUT_OFF)) |
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191 | return -1; |
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192 | /* |
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193 | Samp clock AD9512 outputs on WARP v3 board: |
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194 | OUT0: AD2 (LVPECL) |
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195 | OUT1: Clock module header (LVPECL) |
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196 | OUT2: AD1 (LVPECL) |
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197 | OUT3: FPGA col2 SRCC (LVDS) |
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198 | OUT4: FMC (LVDS) |
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199 | |
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200 | RF ref clock AD9512 outputs on WARP v3 board: |
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201 | OUT0: Clock module header (LVPECL) |
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202 | OUT1: NC |
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203 | OUT2: NC |
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204 | OUT3: Both MAX2829 ref (RFA=CMOSp, RFB=CMOSn; must be 20 or 40 MHz) |
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205 | OUT4: FMC (LVDS) |
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206 | */ |
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207 | |
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208 | u8 lvpecl_cfg, lvds_cfg, cmos_cfg; |
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209 | |
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210 | //Set the register values to write, based on output type and user ON/OFF param |
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211 | if(clkOutMode == CLK_OUTPUT_ON) lvpecl_cfg = 0x8; //LVPECL output on, 805mV drive |
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212 | else lvpecl_cfg = 0x2; //output off (for outputs w/ load resistors) |
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213 | |
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214 | if(clkOutMode == CLK_OUTPUT_ON) lvds_cfg = 0x2; //output on, LVDS logic, 3.5mA drive |
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215 | else lvds_cfg = 0x1; //output off |
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216 | |
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217 | if(clkOutMode == CLK_OUTPUT_ON) cmos_cfg = 0x18; //+/- outputs on, CMOS logic |
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218 | else cmos_cfg = 0x1; //output off |
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219 | |
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220 | /***** Sampling Clock Buffer Config ******/ |
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221 | //reg 0x3D, 0x3E, 0x3F: CLKOUT[0,1,2] config |
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222 | // [1:0] LVPECL power down |
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223 | // (0x0=on, 0x2=PD2 (power down outputs w/ load resistors), 0x3=PD3 (power down outputs w/out load resistors) |
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224 | // [3:2] LVPECL output drive (set to 0x2 for default 805mv) |
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225 | if(clkOutSel & CLK_SAMP_OUTSEL_AD_RFB) clk_spi_write(baseaddr, CLK_SAMP_CS, 0x3D, lvpecl_cfg); //CLKOUT0 |
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226 | if(clkOutSel & CLK_SAMP_OUTSEL_CLKMODHDR) clk_spi_write(baseaddr, CLK_SAMP_CS, 0x3E, lvpecl_cfg); //CLKOUT1 |
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227 | if(clkOutSel & CLK_SAMP_OUTSEL_AD_RFA) clk_spi_write(baseaddr, CLK_SAMP_CS, 0x3F, lvpecl_cfg); //CLKOUT2 |
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228 | |
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229 | //reg 0x40, 0x41: CLKOUT[3,4] config |
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230 | // [0] 0=output on, 1=output off |
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231 | // [2:1] LVDS output current (set to 0x1 for 3.5mA default) |
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232 | // [3] Logic (0=LVDS, 1=CMOS) |
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233 | // [4] CMOS- (0=Disable CMOS inverted output; 1=enable) |
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234 | if(clkOutSel & CLK_SAMP_OUTSEL_FPGA) clk_spi_write(baseaddr, CLK_SAMP_CS, 0x40, lvds_cfg); //CLKOUT3 (LVDS) |
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235 | if(clkOutSel & CLK_SAMP_OUTSEL_FMC) clk_spi_write(baseaddr, CLK_SAMP_CS, 0x41, lvds_cfg); //CLKOUT4 (LVDS) |
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236 | |
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237 | //Trigger register update |
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238 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x5A, 0x01); //Self-clearing register update flag |
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239 | |
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240 | /***** RF Ref Clock Buffer Config ******/ |
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241 | //reg 0x3D: CLKOUT0 config |
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242 | // [1:0] LVPECL power down |
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243 | // (0x0=on, 0x2=PD2 (power down outputs w/ load resistors), 0x3=PD3 (power down outputs w/out load resistors) |
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244 | // [3:2] LVPECL output drive (set to 0x2 for default 805mv) |
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245 | //CLKOUT1, CLKOUT2 are unused and are disabled in clk_init |
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246 | if(clkOutSel & CLK_RFREF_OUTSEL_CLKMODHDR) clk_spi_write(baseaddr, CLK_RFREF_CS, 0x3D, lvpecl_cfg); //CLKOUT0 |
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247 | |
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248 | //reg 0x40, 0x41: CLKOUT[3,4] config |
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249 | // [0] 0=output on, 1=output off |
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250 | // [2:1] LVDS output current (set to 0x1 for 3.5mA default) |
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251 | // [3] Logic (0=LVDS, 1=CMOS) |
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252 | // [4] CMOS- (0=Disable CMOS inverted output; 1=enable) |
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253 | if(clkOutSel & CLK_RFREF_OUTSEL_RFAB) clk_spi_write(baseaddr, CLK_RFREF_CS, 0x40, cmos_cfg); //CLKOUT3 (CMOS +/-) |
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254 | if(clkOutSel & CLK_RFREF_OUTSEL_FMC) clk_spi_write(baseaddr, CLK_RFREF_CS, 0x41, lvds_cfg); //CLKOUT4 (LVDS) |
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255 | |
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256 | //Trigger register update |
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257 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x5A, 0x01); //Self-clearing register update flag |
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258 | |
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259 | return 0; |
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260 | } |
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261 | |
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262 | /** |
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263 | \brief Configures whether the RF Reference Buffer uses the on-board or off-board clock source |
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264 | \param baseaddr Base memory address of w3_clock_controller pcore |
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265 | \param clkInSel Clock source mask, must be either CLK_INSEL_ONBOARD (for on-board oscillator) or CLK_INSEL_CLKMOD (for off-board clock via clock module header) |
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266 | Mask | Selected Input |
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267 | ---- | ---- |
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268 | CLK_INSEL_ONBOARD | Selects on-board TCXO as RF Reference clock source (AD9512 CLK1/CLK1B port) |
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269 | CLK_INSEL_CLKMOD | Selects off-board clock from clock module header as RF Reference clock source (AD9512 CLK2/CLK2B port) |
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270 | \return Returns 0 on success, -1 for invalid parameters |
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271 | */ |
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272 | int clk_config_input_rf_ref(u32 baseaddr, u8 clkInSel) { |
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273 | if((clkInSel != CLK_INSEL_ONBOARD) && (clkInSel != CLK_INSEL_CLKMOD)) |
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274 | return -1; |
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275 | /* |
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276 | Samp clock AD9512 inputs on WARP v3 board: |
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277 | CLK1: On-board TCXO |
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278 | CLK2: Clock module header |
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279 | */ |
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280 | |
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281 | /***** Sampling Clock Buffer Config ******/ |
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282 | //reg 0x45 |
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283 | // [0] Input sel (0=CLK2, 1=CLK1) |
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284 | // [1] 1=Power down CLK1 input circuit |
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285 | // [2] 1=Power down CLK2 input circuit |
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286 | // [3:4] Reserved |
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287 | // [5] Power down both input circuits |
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288 | // [6:7] Reserved |
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289 | if(clkInSel == CLK_INSEL_ONBOARD) clk_spi_write(baseaddr, CLK_RFREF_CS, 0x45, 0x05); //Select CLK1, power down CLK2 |
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290 | if(clkInSel == CLK_INSEL_CLKMOD) clk_spi_write(baseaddr, CLK_RFREF_CS, 0x45, 0x02); //Select CLK2, power down CLK1 |
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291 | |
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292 | //Trigger register update |
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293 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x5A, 0x01); //Self-clearing register update flag |
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294 | |
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295 | return 0; |
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296 | } |
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297 | |
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298 | /** |
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299 | \brief Reads the status pins of the currently installed clock module |
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300 | \param baseaddr Base memory address of w3_clock_controller pcore |
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301 | \return Returns a 16-bit value for the clock module status; the meaning of the status bits depends on the currently installed module |
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302 | */ |
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303 | u16 clk_config_read_clkmod_status(u32 baseaddr) { |
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304 | u16 status; |
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305 | status = (Xil_In32(baseaddr + CLKCTRL_REG_CONFIG)) >> 16; |
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306 | |
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307 | return status; |
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308 | } |
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309 | |
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310 | /** |
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311 | \brief Configures output dividers in both AD9512 clock buffers |
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312 | \param baseaddr Base memory address of w3_clock_controller pcore |
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313 | \param clkDiv Divider value to set; must be 1 or even integer in [2,32] |
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314 | \param clkOutSel Masks to select which clock outputs to affect; must be OR'd combination of: |
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315 | Mask | Selected Output |
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316 | ---- | ---- |
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317 | CLK_SAMP_OUTSEL_FMC | Sampling clock buffer to FMC slot |
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318 | CLK_SAMP_OUTSEL_CLKMODHDR | Sampling clock buffer to clock module header |
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319 | CLK_SAMP_OUTSEL_FPGA | Sampling clock buffer to FPGA |
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320 | CLK_SAMP_OUTSEL_AD_RFA | Sampling clock buffer to RF A AD9963 (ADC/DAC ref clock) |
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321 | CLK_SAMP_OUTSEL_AD_RFB | Sampling clock buffer to RF B AD9963 (ADC/DAC ref clock) |
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322 | CLK_RFREF_OUTSEL_FMC | RF ref clock buffer to FMC |
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323 | CLK_RFREF_OUTSEL_CLKMODHDR | RF ref clock buffer to clock module header |
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324 | CLK_RFREF_OUTSEL_RFAB | RF ref clock buffer to RF A and B transceivers |
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325 | \return Returns 0 on success, -1 for invalid parameters |
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326 | */ |
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327 | int clk_config_dividers(u32 baseaddr, u8 clkDiv, u32 clkOutSel) { |
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328 | /* |
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329 | AD9512 reg 0x[4A,4C,4E,50,52]: Divider config high/low for CLKOUT[0,1,2,3,4] |
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330 | [3:0] Divider high cycles |
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331 | [7:4] Divider low cycles |
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332 | Clock freq divided by ((high+1)+(low+1)) |
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333 | 50% duty cycle requkired; only possible with 1 or even division ratios (high==low) |
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334 | |
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335 | AD9512 reg 0x[4B,4D,4F,51,53]: Divider power down & sync for CLKOUT[0,1,2,3,4] |
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336 | [7] 1=disable and bypass divider logic, 0=use divider |
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337 | [6:0] Divider sync setup (not currently used) |
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338 | */ |
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339 | |
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340 | u8 div_pd, div_cfg; |
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341 | |
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342 | //Check for invalid clkDiv value (any odd value besides 1, greater than 32, or 0) |
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343 | if( ((clkDiv != 1) && (clkDiv & 0x1)) || clkDiv > 32 || clkDiv == 0) |
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344 | return -1; |
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345 | |
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346 | if(clkDiv == 1) { |
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347 | div_pd = 0x80; //divide-by-1 requires bypassing divider entirely |
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348 | div_cfg = 0x00; |
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349 | } else { |
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350 | div_pd = 0x00; //enable divider |
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351 | |
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352 | //Calculate number of high/low cycles |
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353 | div_cfg = (clkDiv>>1)-1; |
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354 | |
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355 | //Set high=low |
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356 | div_cfg = (div_cfg<<4) | div_cfg; |
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357 | } |
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358 | |
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359 | |
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360 | //Sampling clock buffer |
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361 | if(clkOutSel & CLK_SAMP_OUTSEL_AD_RFB) { //CLKOUT0 |
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362 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4A, div_cfg); |
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363 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4B, div_pd); |
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364 | } |
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365 | if(clkOutSel & CLK_SAMP_OUTSEL_CLKMODHDR) { //CLKOUT1 |
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366 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4C, div_cfg); |
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367 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4D, div_pd); |
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368 | } |
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369 | if(clkOutSel & CLK_SAMP_OUTSEL_AD_RFA) { //CLKOUT2 |
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370 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4E, div_cfg); |
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371 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x4F, div_pd); |
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372 | } |
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373 | if(clkOutSel & CLK_SAMP_OUTSEL_FPGA) { //CLKOUT3 |
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374 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x50, div_cfg); |
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375 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x51, div_pd); |
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376 | } |
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377 | if(clkOutSel & CLK_SAMP_OUTSEL_FMC) { //CLKOUT4 |
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378 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x52, div_cfg); |
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379 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x53, div_pd); |
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380 | } |
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381 | |
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382 | //Trigger register update |
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383 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x5A, 0x01); //Self-clearing register update flag |
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384 | |
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385 | // Sync outputs (High -> Low transition on bit 2 - Soft SYNC) |
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386 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x58, 0x04); |
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387 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x5A, 0x01); //Self-clearing register update flag |
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388 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x58, 0x00); |
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389 | clk_spi_write(baseaddr, CLK_SAMP_CS, 0x5A, 0x01); //Self-clearing register update flag |
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390 | |
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391 | //RF reference clock buffer |
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392 | if(clkOutSel & CLK_RFREF_OUTSEL_CLKMODHDR) { //CLKOUT0 |
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393 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x4A, div_cfg); |
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394 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x4B, div_pd); |
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395 | } |
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396 | //CLKOUT1, CLKOUT2 are unused; dividers are disabled in clk_init |
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397 | if(clkOutSel & CLK_RFREF_OUTSEL_RFAB) { //CLKOUT3 |
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398 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x50, div_cfg); |
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399 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x51, div_pd); |
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400 | } |
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401 | if(clkOutSel & CLK_RFREF_OUTSEL_FMC) { //CLKOUT4 |
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402 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x52, div_cfg); |
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403 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x53, div_pd); |
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404 | } |
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405 | |
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406 | //Trigger register update |
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407 | clk_spi_write(baseaddr, CLK_RFREF_CS, 0x5A, 0x01); //Self-clearing register update flag |
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408 | |
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409 | return 0; |
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410 | } |
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411 | |
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412 | /** |
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413 | \brief Reads the specified register from both AD9963s |
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414 | \param baseaddr Base memory address of w3_clock_controller pcore |
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415 | \param csMask OR'd combination of CLK_SAMP_CS and CLK_RFREF_CS |
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416 | \param regAddr Address of register to read, in [0x00, 0x5A] |
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417 | \return Returns concatenation of current values of the specified register for both AD9512s (if selected); samp clock buffer is LSB |
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418 | */ |
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419 | u32 clk_spi_read(u32 baseaddr, u32 csMask, u8 regAddr) { |
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420 | u32 txWord, rxWord; |
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421 | |
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422 | //SPI Tx register is 4 bytes: |
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423 | // [3]: chip selects (bitwise OR'd ADCTRL_REG_SPITX_ADx_CS) |
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424 | // [2]: {rnw n1 n0 5'b0}, rnw=1 for SPI write, n1=n0=0 for 1 byte write |
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425 | // [1]: reg addr[7:0] |
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426 | // [0]: ignored for read (read value captured in Rx register) |
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427 | txWord = (csMask & (CLK_SAMP_CS | CLK_RFREF_CS)) | //chip selects |
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428 | (CLKCTRL_REG_SPITX_RNW) | //spi_tx_byte[2] = {rnw n1 n0 5'b0} |
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429 | ((regAddr & 0x7F)<<8) | //spi_tx_byte[1] = addr[7:0] |
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430 | (0x00); //spi_tx_byte[0] = ignored for read (AD drives data pin during this byte) |
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431 | |
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432 | Xil_Out32(baseaddr + CLKCTRL_REG_SPITX, txWord); |
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433 | |
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434 | rxWord = Xil_In32(baseaddr + CLKCTRL_REG_SPIRX); |
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435 | |
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436 | return(rxWord); |
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437 | } |
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438 | |
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439 | /** |
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440 | \brief Writes the specified register value to the selected AD9512 clock buffers |
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441 | \param baseaddr Base memory address of w3_clock_controller pcore |
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442 | \param csMask OR'd combination of CLK_SAMP_CS and CLK_RFREF_CS |
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443 | \param regAddr Address of register to write, in [0x00, 0x5A] |
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444 | \param txByte 8-bit value to write |
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445 | */ |
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446 | void clk_spi_write(u32 baseaddr, u32 csMask, u8 regAddr, u8 txByte) { |
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447 | u32 txWord; |
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448 | |
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449 | //SPI read process: |
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450 | // -Write full SPI word with RNW=1 and address of desired register |
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451 | // -Capture register value in last byte of SPI write process (handled automatically in logic) |
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452 | |
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453 | //SPI Tx register is 4 bytes: |
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454 | // [3]: chip selects (bitwise OR'd ADCTRL_REG_SPITX_ADx_CS) |
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455 | // [2]: {rnw n1 n0 5'b0}, rnw=0 for SPI write, n1=n0=0 for 1 byte write |
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456 | // [1]: reg addr[7:0] |
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457 | // [0]: reg data[7:0] |
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458 | txWord = (csMask & (CLK_SAMP_CS | CLK_RFREF_CS)) | //chip selects |
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459 | (0x00) | //spi_tx_byte[2] = {rnw n1 n0 5'b0} |
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460 | ((regAddr & 0xFF)<<8) | //spi_tx_byte[1] = addr[7:0] |
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461 | (txByte & 0xFF); //spi_tx_byte[0] = data byte to write |
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462 | |
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463 | Xil_Out32(baseaddr + CLKCTRL_REG_SPITX, txWord); |
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464 | |
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465 | return; |
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466 | } |
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467 | |
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468 | /** @}*/ //END group user_functions |
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