diff options
Diffstat (limited to 'nuttx/configs/pirelli_dpl10/README.txt')
| -rw-r--r-- | nuttx/configs/pirelli_dpl10/README.txt | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/nuttx/configs/pirelli_dpl10/README.txt b/nuttx/configs/pirelli_dpl10/README.txt index b53a25917..59b7d7951 100644 --- a/nuttx/configs/pirelli_dpl10/README.txt +++ b/nuttx/configs/pirelli_dpl10/README.txt @@ -54,6 +54,21 @@ o highram is for phones having the romloader(if the phone has a bootrom) by talking to the ramloader) when having a ramloader(which can only load 64k). +Memory Map +========= + +Calypso has 256KB of internal SRAM (0x800000-0x83ffff). Only this internal SRAM +is used by these configurations. The internal SRAM is broken up into three +logic banks. + + LRAM (rw) : ORIGIN = 0x00800000, LENGTH = 0x00020000 + TRAM (rw) : ORIGIN = 0x00820000, LENGTH = 0x00010000 + IRAM (rw) : ORIGIN = 0x00830000, LENGTH = 0x00010000 + +Code can be loaded by the bootloader only into TRAM and, hence, is restricted +to 64KB. The additional 64KB if IRAM may be used for uninitialized data and +for the NuttX heap only. + JTAG and Alternative Serial Console =================================== @@ -116,3 +131,54 @@ JTAG Apapter: the MCU to enter a bootloader on reset. Use 10K-100K Ohm pull up resistor. ------- ----------- --------------- -------------------------------------- + +NuttX OABI "buildroot" Toolchain +================================ + + A GNU GCC-based toolchain is assumed. The files */setenv.sh should + be modified to point to the correct path to the ARM GCC toolchain (if + different from the default in your PATH variable). + + If you have no ARMtoolchain, one can be downloaded from the NuttX + SourceForge download site (https://sourceforge.net/projects/nuttx/files/buildroot/). + This GNU toolchain builds and executes in the Linux or Cygwin environment. + + 1. You must have already configured Nuttx in <some-dir>/nuttx. + + cd tools + ./configure.sh pirelli_dpl10/<sub-dir> + + 2. Download the latest buildroot package into <some-dir> + + 3. unpack the buildroot tarball. The resulting directory may + have versioning information on it like buildroot-x.y.z. If so, + rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot. + + 4. cd <some-dir>/buildroot + + 5. cp configs/arm7tdmi-defconfig-4.3.3 .config + + 6. make oldconfig + + 7. make + + 8. Edit setenv.h, if necessary, so that the PATH variable includes + the path to the newly built binaries. + + See the file configs/README.txt in the buildroot source tree. That has more + details PLUS some special instructions that you will need to follow if you are + building a Cortex-M3 toolchain for Cygwin under Windows. + +Generic OABI Toolchain +====================== + + The NuttX OABI toolchain is selected with: + + CONFIG_ARM_TOOLCHAIN_BUILDROOT=y + CONFIG_ARM_OABI_TOOLCHAIN=y + + In most cases, OsmocomBB is built with a different OABI toolchain with a + prefix of arm-elf-. To use that toolchain, change the configuration as + follows: + + CONFIG_ARM_TOOLCHAIN_GNU_OABI=y |