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Diffstat (limited to 'libmaple/i2c_private.h')
| -rw-r--r-- | libmaple/i2c_private.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libmaple/i2c_private.h b/libmaple/i2c_private.h new file mode 100644 index 0000000..5b79516 --- /dev/null +++ b/libmaple/i2c_private.h @@ -0,0 +1,79 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2012 LeafLabs, LLC. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +#ifndef _LIBMAPLE_I2C_PRIVATE_H_ +#define _LIBMAPLE_I2C_PRIVATE_H_ + +#include <libmaple/i2c_common.h> + +/* For old-style definitions (SDA/SCL on same GPIO device) */ +#define I2C_DEV_OLD(num, port, sda, scl) \ + { \ + .regs = I2C##num##_BASE, \ + .gpio_port = port, \ + .scl_port = NULL, \ + .sda_port = NULL, \ + .sda_pin = sda, \ + .scl_pin = scl, \ + .clk_id = RCC_I2C##num, \ + .ev_nvic_line = NVIC_I2C##num##_EV, \ + .er_nvic_line = NVIC_I2C##num##_ER, \ + .state = I2C_STATE_DISABLED, \ + } + +/* For new-style definitions (SDA/SCL may be on different GPIO devices) */ +#define I2C_DEV_NEW(num, sdaport, sdabit, sclport, sclbit) \ + { \ + .regs = I2C##num##_BASE, \ + .gpio_port = NULL, \ + .scl_port = sclport, \ + .scl_pin = sclbit, \ + .sda_port = sdaport, \ + .sda_pin = sdabit, \ + .clk_id = RCC_I2C##num, \ + .ev_nvic_line = NVIC_I2C##num##_EV, \ + .er_nvic_line = NVIC_I2C##num##_ER, \ + .state = I2C_STATE_DISABLED, \ + } + +void _i2c_irq_handler(i2c_dev *dev); +void _i2c_irq_error_handler(i2c_dev *dev); + +struct gpio_dev; + +static inline struct gpio_dev* scl_port(const i2c_dev *dev) { + return (dev->gpio_port == NULL) ? dev->scl_port : dev->gpio_port; +} + +static inline struct gpio_dev* sda_port(const i2c_dev *dev) { + return (dev->gpio_port == NULL) ? dev->sda_port : dev->gpio_port; +} + +/* Auxiliary procedure for enabling an I2C peripheral; `flags' as for + * i2c_master_enable(). */ +void _i2c_set_ccr_trise(i2c_dev *dev, uint32 flags); + +#endif /* _LIBMAPLE_I2C_PRIVATE_H_ */ |