LM4F initial support #74
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| /* This file is part of the libopencm3 project. | ||
| * | ||
| * It was generated by the irq2nvic_h script. | ||
| * |
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This file shouldn't be committed, it it's generated every time by the build scripts.
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Thank you for catching that. I will push an updated fix soon.
Create lm4f code infrastructure from the lm3s infrastructure. As far as the interrupt table is concerned, don't create an irq.yaml. Just include the LM3S nvic.h. The LM3S vector table seems to be compatible with the LM4F Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Fix three distinct issues were present with examples/lm4f/Makefile.include: 1. Architecture flags were not being passed to the linker. This caused the linker to link against the wrong libraries when trying to use any C library, causing hard faults. 2. -lc and -lnosys were not linked against. Try using printf() without -lnosys 3. The makefile erroneously specified -mcpu=cortex-m3 instead of m4. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Specify the -mfloat-abi=hard and -mfpu=fpv4-sp-d16 flags so that FPU is enabled by default. While this compiles with FPU support, in order to use the floating point types, the FPU must be explicitly enabled at runtime. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add an "#ifdef(LM4F)" clause to include/libopencm3/dispatch/nvic.h and lib/dispatch/vector_nvic.c. This compiles in the vector table and allows interrupts to be used. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The LM4F provides new registers for system control. Each peripheral now has its own clock gating control register. The LM4F still supports the legacy registers for backwards compatibility. Use SYSCTL_RCGCGPIO instead of SYSCTL_RCGC to enable the GPIO. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
There was no reference to LM4F in in the doc/ subdirectory. Add the needed infrastructure to generate focumentation for LM4F. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
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Jan 7, 2013
Merge remote-tracking branch 'mrnuke/lm4f_initial'
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This is a cherry pick of the most important commits needed to get LM4F working properly with libopencm3, as well as a basic example.
I've picked these from my stellaris branch. I consider these commits to be well tested.