readme.txt 5.5 KB

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  1. This document explains how to set up a basic Buildroot system on various
  2. Atmel boards. Additional details can also be found on the Linux4SAM website:
  3. http://www.at91.com/linux4sam/bin/view/Linux4SAM/
  4. This guide covers the following configurations:
  5. - at91sam9g45m10ek_defconfig
  6. - at91sam9rlek_defconfig
  7. - at91sam9x5ek_defconfig (at91sam9g15, at91sam9g25, at91sam9x25,
  8. at91sam9g35 and at91sam9x35)
  9. - atmel_sama5d3xek_defconfig (sama5d31, sama5d33, sama5d34, sama5d35,
  10. sama5d36)
  11. - atmel_sama5d3_xplained_defconfig
  12. - atmel_sama5d3_xplained_dev_defconfig
  13. - atmel_sama5d3_xplained_mmc_defconfig
  14. - atmel_sama5d3_xplained_mmc_dev_defconfig
  15. - atmel_sama5d4_xplained_defconfig
  16. - atmel_sama5d4_xplained_dev_defconfig
  17. - atmel_sama5d4_xplained_mmc_defconfig
  18. - atmel_sama5d4_xplained_mmc_dev_defconfig
  19. - atmel_sama5d2_xplained_mmc_defconfig
  20. - atmel_sama5d2_xplained_mmc_dev_defconfig
  21. These configurations will use AT91Bootstrap, u-boot and a linux kernel from
  22. the git trees maintained by Atmel.
  23. The configurations labeled as 'dev' provide a development rootfs with tools to
  24. tests the features of the SoC:
  25. - ALSA tools to test audio
  26. - FFMPEG to record video from the ISI/ISC
  27. - I2C, SPI, CAN, etc. tools
  28. - modetest for LCD screens, HDMI
  29. - Wilc1000 firmware for the Atmel Wireless sdio module
  30. - SSH for convenience
  31. - GDB/GDB server for debug
  32. Configuring and building Buildroot
  33. ==================================
  34. For most configurations listed above, the Buildroot configuration
  35. assumes the system will be flashed on NAND. In this case, after
  36. building Buildroot, follow the instructions in the "Flashing the NAND
  37. using SAM-BA" section below.
  38. For the Xplained boards, an alternative Buildroot configuration is
  39. provided to boot from an SD card. Those configurations are labeled as
  40. 'mmc'. In this case, after building Buildroot, follow the instructions
  41. in the "Preparing the SD card" section.
  42. To configure and build Buildroot, run:
  43. make <board>_defconfig
  44. make
  45. Flashing the NAND using SAM-BA
  46. ==============================
  47. Flashing the board
  48. ------------------
  49. Connect the board:
  50. o at91sam9g45m10ek: DBGU: J10, USB sam-ba: J14
  51. o at91sam9rlek: DBGU: J19, USB sam-ba: J21
  52. o at91sam9x5ek: DBGU: J11, USB sam-ba: J20
  53. o sama5d3xek: DBGU: J14, USB sam-ba: J20
  54. o sama5d3 Xplained: DBGU: J23, USB sam-ba: J6
  55. o sama5d4ek: DBGU: J22 or J24, USB sam-ba: J1
  56. o sama5d4 Xplained: DBGU: J1, USB sam-ba: J11
  57. Start the board in RomBOOT:
  58. o at91sam9g45m10ek:
  59. 1. open JP8, JP10 and JP12
  60. 2. start the board
  61. 3. close JP8, JP10 and JP12
  62. o at91sam9rlek:
  63. 1. J11 on 1-2 (BMS=1), open J12 and J13
  64. 2. start the board
  65. 3. close J12 and J13
  66. o at91sam9x5ek:
  67. 1. open JP9 and:
  68. - Cogent: open *NCS jumper
  69. - Embest: open SW1
  70. - Ronetix: open J1 and J2
  71. 2. start the board
  72. 3. close JP9 and:
  73. - Cogent: close *NCS jumper
  74. - Embest: close SW1 (ON position)
  75. - Ronetix: close J1 and J2
  76. o sama5d3xek:
  77. 1. start the board
  78. 2. push BP4 and BP1
  79. 3. release BP1
  80. 4. release BP4
  81. o sama5d3 Xplained:
  82. 1. open JP5 (NANDCS) and JP6 (SPICS)
  83. 2. start the board
  84. 3. close JP5 ans JP6
  85. o sama5d4ek:
  86. 1. start the board
  87. 2. push BP3 and BP4
  88. 3. release BP4
  89. 4. release BP3
  90. o sama5d4 Xplained:
  91. 1. close JP7 (BOOT_DIS)
  92. 2. start the board
  93. 3. open JP7
  94. "RomBOOT" should appear on your console (this should be ttyUSBx or ttyACMx)
  95. Now locate the USB sam-ba interface it should be ttyACMx, usually ttyACM0
  96. dmesg on your machine should give:
  97. usb 1-2.1.4: New USB device found, idVendor=03eb, idProduct=6124
  98. usb 1-2.1.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
  99. cdc_acm 1-2.1.4:1.0: ttyACM0: USB ACM device
  100. Look for idVendor=03eb, idProduct=6124, this is the interface you want to use.
  101. You can then flash the board using the provided flasher.sh script in board/atmel:
  102. board/atmel/flasher.sh <builddir_path> <interface> <board>
  103. For example, for an out of tree build made in
  104. /tmp/atmel_sama5d3_xplained/ for the sama5d3 Xplained, you would use:
  105. board/atmel/flasher.sh /tmp/atmel_sama5d3_xplained/ /dev/ttyACM0 sama5d3_xplained
  106. Reboot, the system should boot up to the buildroot login invite.
  107. Preparing the SD card
  108. =====================
  109. An image named sdcard.img is automatically generated. With this image,
  110. you no longer have to care about the creation of the partition and
  111. copying files to the SD card.
  112. You need at least a 1GB SD card. All the data on the SD card will be
  113. lost. To copy the image on the SD card:
  114. /!\ Caution be sure to do it on the right mmcblk device /!\
  115. dd if=output/images/sdcard.img of=/dev/mmcblk0
  116. Insert your SD card in your Xplained board, and enjoy. The default
  117. U-Boot environment will load properly the kernel and Device Tree blob
  118. from the first partition of the SD card, so everything works
  119. automatically.
  120. By default a 16MB FAT partition is created. It contains at91bootstrap,
  121. u-boot, the kernel image and all dtb variants for your board. The dtb
  122. used is the basic one:
  123. U-Boot> print
  124. [...]
  125. bootcmd=fatload mmc 1:1 0x21000000 at91-sama5d2_xplained.dtb; fatload mmc 1:1 0x22000000 zImage; bootz 0x22000000 - 0x21000000
  126. [...]
  127. If you want to use a variant such as the _pda7 one, you will have to
  128. update your u-boot environment:
  129. U-Boot> setenv bootcmd 'fatload mmc 1:1 0x21000000 at91-sama5d2_xplained_pda7.dtb; fatload mmc 1:1 0x22000000 zImage; bootz 0x22000000 - 0x21000000'
  130. U-Boot> save
  131. Saving Environment to FAT...
  132. writing uboot.env
  133. done
  134. A 512MB ext4 partition is also created to store the rootfs generated.
  135. If you want to customize the size of the partitions and their content,
  136. take a look at the the genimage.cfg file in the board directory.