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* i2c-mcp4725-dac.cpp: Fix whitespace.Marti Bolivar2012-06-221-59/+59
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Add I2C example for MCP4725 DAC.Marti Bolivar2012-06-221-0/+145
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/stm32f1/i2c.c: Add Doxygen file header.Marti Bolivar2012-06-221-0/+5
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* i2c_dev: deprecate .gpio_port.Marti Bolivar2012-06-224-23/+77
| | | | | | | | | | | | | This won't work on F2, which at times has SDA and SCL on different ports (e.g. I2C3 SDA on PC9, SCL on PA8). Add .sda_port and .scl_port replacements, which are used when the now-deprecated .gpio_port is null. Use them correctly everywhere, with some new i2c_private.h helper functionality. Sigh. The F1 I2C code tries too hard to guess what you wanted; it's not porting well at all. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* STM32F1: i2c_config_gpios(): Do afio_remap() if we should.Marti Bolivar2012-06-221-0/+4
| | | | | | This should help avoid surprising some users. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Move nonportable CCR/TRISE configuration.Marti Bolivar2012-06-223-33/+44
| | | | | | Do this via new private _i2c_set_ccr_trise(). Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Deprecate I2C_REMAP flag.Marti Bolivar2012-06-223-7/+26
| | | | | | | | This is ad-hoc and nonportable. If you really want I2C mapped elsewhere, then mess with the I2C device fields and call afio_remap() yourself. (This is also cleaner for F2). Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Move F1-only errata workarounds out of libmaple/i2c.c.Marti Bolivar2012-06-224-30/+57
| | | | | | | | | The IRQ priority hack is unnecessary on targets with properly functioning I2C IRQ handlers, so we shouldn't use it unless we have to. Add a mechanism so a series header can provide such a hack if necessary. Have the F1 series header use this mechanism. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.c: Cosmetics.Marti Bolivar2012-06-221-188/+190
| | | | | | Move private API to bottom of file. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.c: Keep authorship straight.Marti Bolivar2012-06-221-0/+1
| | | | | | | I'm going to be moving a lot of code around without changing it soon, so git blame will be unreliable. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Add i2c_config_gpios(), i2c_master_release_bus().Marti Bolivar2012-06-223-6/+43
| | | | | | These are necessary to pull out some calls to gpio_set_mode(). Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/i2c.h>: Fix Doxygen.Marti Bolivar2012-06-221-3/+3
| | | | | | | Existing Doxygen was commenting I2C_IRQ_ERROR instead of i2c_enable_irq(), as desired. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.h: Better comments.Marti Bolivar2012-06-221-2/+16
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.c: Replace throb() with ASSERT(0).Marti Bolivar2012-06-221-1/+1
| | | | | | Calling throb() directly like that breaks the abstraction. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: I don't think 10-bit addressing works.Marti Bolivar2012-06-221-0/+3
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/i2c.h>: Move low-level routines to end of file.Marti Bolivar2012-06-221-71/+73
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Fix Doxygen F1-isms.Marti Bolivar2012-06-221-3/+6
| | | | | | | | I'm not sure these functions should even exist in their present form,, but I don't understand the code well enough to make a real fix. For now, just replace references to RM0008 with "chip reference manual". Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* i2c_set_input_clk(): fix an F1-ism.Marti Bolivar2012-06-222-1/+26
| | | | | | | | | | | | | | | i2c_set_input_clk()'s documentation says that the maximum peripheral clock frequency is 36 MHz, but that's a hard-coded magic number. The actual limit is the device's APB frequency or 46 MHz, whichever is lower (F2 and F4 share the 46 MHz limit). Fix the documentation to reflect that fact, and add an internal series-provided function to get the maximum clock frequency for a device. To help users porting to F2, have i2c_set_input_clk() assert-check that the provided frequency is less than that maximum value and the hard 46 MHz limit. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Move i2c_dev and i2c_state into new i2c_common.h.Marti Bolivar2012-06-223-31/+84
| | | | | | | This is necessary to add series-specific infrastructure to clean up some F1-isms in <libmaple/i2c.h>'s inline functions. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.h: Cosmetics.Marti Bolivar2012-06-221-1/+4
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* I2C: Restore on F1, refactoring prep for F2.Marti Bolivar2012-06-227-63/+171
| | | | | | | | | | | | | | | | | | | | | | | | | Bring back <libmaple/i2c.h> support on STM32F1 with a view towards how it'll be implemented on STM32F2. There are still many F1-isms in libmaple/i2c.c and <libmaple/i2c.h>, to be dealt with subsequently. Move device declarations and base pointer definitions to a new F1 <series/i2c.h>. The register maps and bit definitions themselves are identical on both series, so leave them in the libmaple header. Add i2c_private.h, which contains: - I2C_DEV(), a convenience macro for defining an i2c_dev, and - declarations for the event and error IRQ handlers. The IRQ handlers are large, and I2C is slow anyway, so I see no reason to make them inline in the private header (as we do for some other peripherals). We just expose the existing ones that were formerly static in libmaple/i2c.c, but prefix the names with underscore. Move the device declarations and IRQ handlers into new stm32f1/i2c.c. These use the i2c_private.h API. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.c: Cosmetics.Marti Bolivar2012-06-221-2/+0
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/i2c.h>: Cosmetics.Marti Bolivar2012-06-221-6/+6
| | | | | | Put CCR definitions after SR2, to keep them in register map order. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/i2c.h>: Cosmetics.Marti Bolivar2012-06-221-20/+20
| | | | | | | Reorder register bit definitions by descending bit number, for consistency with the rest of the library. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/i2c.h>: Add missing register bit defns.Marti Bolivar2012-06-221-0/+22
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.h: Assert LeafLabs copyright.Marti Bolivar2012-06-221-0/+1
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Fix I2C_CR2_FREQ bit definition.Marti Bolivar2012-06-221-1/+1
| | | | | | The existing value clobbers the entire register. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.h: Cosmetics.Marti Bolivar2012-06-221-1/+1
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* libmaple/i2c.h: Don't use BIT().Marti Bolivar2012-06-221-40/+40
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* <libmaple/dma.h>: Assert LeafLabs copyright.Marti Bolivar2012-06-211-0/+1
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Port test-usart-dma.cpp for STM32F2.Marti Bolivar2012-06-151-0/+9
| | | | | | Too ugly? Meh. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Implement DMA tube API on STM32F2.Marti Bolivar2012-06-154-2/+1315
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Port test-usart-dma.cpp to use tube API.Marti Bolivar2012-06-151-13/+61
| | | | | | | | This is straightforward. Do it in a verbose style with lots of comments, so we can use this patch as an example for how to port existing DMA code. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Implement DMA tube API on STM32F1.Marti Bolivar2012-06-152-4/+60
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* DMA: prep for F2 with new "tube" API.Marti Bolivar2012-06-156-366/+1038
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To prepare for STM32F2/F4 DMA support, introduce a new libmaple DMA API, and move some code around to make priority level and interrupt handling more generic. The new API is based on a new set of types (dma_tube, struct dma_tube_reg_map, enum dma_request_src, enum dma_cfg_flags, and struct dma_tube_config). The central abstraction is the dma_tube type. STM32F2/F4 use DMA streams to control dataflow, and STM32F1 uses channels. dma_tube stands for whichever is appropriate for the current target. Dealing with tubes allows for configuring and using DMA with opaque tube values in the same source, instead of (as with ST's firmware) requiring two separate codebases. The new API is also more user-friendly, as it doesn't require knowing which DMA address registers to set and which configuration register flags go along with them. It now suffices to specify the source and destination for the DMA transfer, along with their sizes. This avoids confusion (e.g. for memory-to-memory transfers, data flows from the peripheral address register to the memory register, which might be surprising on F2, which has two memory address registers). The old API (based on enum dma_mode_flags and dma_setup_transfer()) is still available on F1, but deprecate it. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* test-usart-dma.cpp: tweaks.Marti Bolivar2012-06-131-16/+17
| | | | | | | Touch up comments, change some function names, and don't set something to zero which already is. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* examples/test-usart-dma.cpp: Use HardwareSerial::c_dev().Marti Bolivar2012-06-131-18/+19
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* examples/test-usart-dma.cpp: Cleanups and comments.Marti Bolivar2012-06-131-49/+78
| | | | | | | | Someone pointed to this example on the DMA page in the wiki, so it's probably worth making it more clear what's going on. Remove unused code, add comments, and move things around for better exposition. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* HardwareTimer: add a c_dev().Marti Bolivar2012-06-131-0/+8
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* HardwareSPI: add a c_dev().Marti Bolivar2012-06-131-0/+8
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* HardwareSerial: Add c_dev() accessor for instance's usart_dev*.Marti Bolivar2012-06-131-0/+4
| | | | | | This is analagous to std::string::c_str(). Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Add stm32_private.h.Marti Bolivar2012-06-121-0/+45
| | | | | | | | | This will hold STM32-related things that I'm not sure are well-thought out enough to go into <libmaple/stm32.h>. Currently, it contains an accessor routine that tells you the purpose of the memory block containing an address. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Typo fix.Marti Bolivar2012-06-121-1/+1
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Build libmaple/dma.c on STM32F1.Marti Bolivar2012-06-121-1/+3
| | | | | | F2 doesn't work yet. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* maple: board.cpp: More comments.Marti Bolivar2012-06-081-5/+5
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Bring back <wirish/wirish_debug.h>.Marti Bolivar2012-06-085-7/+105
| | | | Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* maple: board.h: More comments, remove SYSTICK_RELOAD_VAL.Marti Bolivar2012-06-081-9/+14
| | | | | | | We derive SYSTICK_RELOAD_VAL from CYCLES_PER_MICROSECOND now, so let's hide it for expert use. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* enum spi_mode: Add more descriptive enumerators, documentation.Marti Bolivar2012-06-071-11/+16
| | | | | | | | | Instead of requiring everyone to figure it out for themselves, add enumerators specifying the idle logic level and what clock edge triggers data capture. Yes, it's easy enough to figure it out. It's also convenient to have these. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Bring back <libmaple/spi.h>.Marti Bolivar2012-06-078-25/+221
| | | | | | | | | | | Add a spi_private.h with a SPI_DEV(), for convenience. Use it in the F1 and F2 implementations. We could probably unify these with an STM32_HAVE_SPI(n) macro, but we'll leave that for the future. Most everything from F1 is portable; F2 has some additional bit definitions and a spi_get_af() routine, but that's about it. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* wirish/syscalls.c: Assert LeafLabs copyright.Marti Bolivar2012-06-071-0/+1
| | | | | | _sbrk() is new in 2011, and there've been changes in 2012. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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