X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fdrv%2Fi2c.h;h=180e7310a335bed1dc2763341f7c70645373cfaf;hb=72528d250ecbba9c5eba87ce95f7b2590a1db855;hp=f07c083d333686664489d5d88544e0173667fb12;hpb=03c14d1d807783de7b8560727843802c00b19d0f;p=bertos.git diff --git a/bertos/drv/i2c.h b/bertos/drv/i2c.h index f07c083d..180e7310 100644 --- a/bertos/drv/i2c.h +++ b/bertos/drv/i2c.h @@ -30,56 +30,89 @@ * * --> * - * \brief I2C generic driver functions (interface). + * \brief I2C generic driver functions. * - * \version $Id$ * \author Francesco Sacchi + * + * $WIZ$ module_name = "i2c" + * $WIZ$ module_configuration = "bertos/cfg/cfg_i2c.h" + * $WIZ$ module_hw = "bertos/hw/hw_i2c_bitbang.h" + * $WIZ$ module_supports = "not atmega103 and not atmega168 and not at91" */ + #ifndef DRV_I2C_H #define DRV_I2C_H #include "cfg/cfg_i2c.h" + #include +#include + +#include #define I2C_READBIT BV(0) +#define i2c_init(FN_ARGS) PP_CAT(i2c_init ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS) + /** * I2C Backends. - * \{ + * Sometimes your cpu does not have a builtin + * i2c driver or you don't want, for some reason, to + * use that. + * With this you can choose, at compile time, which backend to use. + * + * $WIZ$ i2c_backend = "I2C_BACKEND_BUILTIN", "I2C_BACKEND_BITBANG" */ #define I2C_BACKEND_BUILTIN 0 ///< Uses cpu builtin i2c driver #define I2C_BACKEND_BITBANG 1 ///< Uses emulated bitbang driver -/*\}*/ + +/** + * I2c builtin prototypes. + * Do NOT use these function directly, instead, + * you can call the ones named without "_builtin_" + * and specify in cfg_i2c.h ( \see CONFIG_I2C_BACKEND) + * that you want the builtin backend. + * \{ + */ void i2c_builtin_init(void); bool i2c_builtin_start_w(uint8_t id); bool i2c_builtin_start_r(uint8_t id); void i2c_builtin_stop(void); bool i2c_builtin_put(uint8_t _data); int i2c_builtin_get(bool ack); +/*\}*/ +/** + * I2c bitbang prototypes. + * Same thing here: do NOT use these function directly, instead, + * you can call the ones named without "_bitbang_" + * and specify in cfg_i2c.h ( \see CONFIG_I2C_BACKEND) + * that you want the bitbang backend. + * \{ + */ void i2c_bitbang_init(void); bool i2c_bitbang_start_w(uint8_t id); bool i2c_bitbang_start_r(uint8_t id); void i2c_bitbang_stop(void); bool i2c_bitbang_put(uint8_t _data); int i2c_bitbang_get(bool ack); - +/*\}*/ #if CONFIG_I2C_BACKEND == I2C_BACKEND_BUILTIN - #define i2c_init i2c_builtin_init - #define i2c_start_w i2c_builtin_start_w - #define i2c_start_r i2c_builtin_start_r - #define i2c_stop i2c_builtin_stop - #define i2c_put i2c_builtin_put - #define i2c_get i2c_builtin_get + #define i2c_init_0 i2c_builtin_init + #define i2c_start_w i2c_builtin_start_w + #define i2c_start_r i2c_builtin_start_r + #define i2c_stop i2c_builtin_stop + #define i2c_put i2c_builtin_put + #define i2c_get i2c_builtin_get #elif CONFIG_I2C_BACKEND == I2C_BACKEND_BITBANG - #define i2c_init i2c_bitbang_init - #define i2c_start_w i2c_bitbang_start_w - #define i2c_start_r i2c_bitbang_start_r - #define i2c_stop i2c_bitbang_stop - #define i2c_put i2c_bitbang_put - #define i2c_get i2c_bitbang_get + #define i2c_init_0 i2c_bitbang_init + #define i2c_start_w i2c_bitbang_start_w + #define i2c_start_r i2c_bitbang_start_r + #define i2c_stop i2c_bitbang_stop + #define i2c_put i2c_bitbang_put + #define i2c_get i2c_bitbang_get #else #error Unsupported i2c backend. #endif @@ -87,4 +120,107 @@ int i2c_bitbang_get(bool ack); bool i2c_send(const void *_buf, size_t count); bool i2c_recv(void *_buf, size_t count); + +/* + * I2c new api + * + */ + +struct I2cHardware; +struct I2c; + +typedef int (*i2c_writeRope_t)(struct I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len, ...); +typedef int (*i2c_readRope_t)(struct I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len, ...); + +typedef struct I2c +{ + int dev; + i2c_writeRope_t write; + i2c_readRope_t read; + + struct I2cHardware* hw; +} I2c; + + +#include CPU_HEADER(i2c) + +INLINE void i2c_init_3(I2c *i2c, int dev, uint32_t clock) +{ + i2c_hw_init(i2c, dev, clock); +} + +#define i2c_write(FN_ARGS) PP_CAT(i2c_write ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS) +#define i2c_read(FN_ARGS) PP_CAT(i2c_read ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS) + +/* + * Overloaded functions definition. + */ +INLINE int i2c_write_5(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len) +{ + return i2c->write(i2c, slave_addr, flags, buf, len, NULL); +} + +INLINE int i2c_read_5(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len) +{ + return i2c->read(i2c, slave_addr, flags, buf, len, NULL); +} + + +INLINE int i2c_write_7(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len, + const void *buf1, size_t len1) +{ + return i2c->write(i2c, slave_addr, flags, buf, len, + buf1, len1, NULL); +} + +INLINE int i2c_read_7(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len, + void *buf1, size_t len1) + +{ + return i2c->read(i2c, slave_addr, flags, buf, len, + buf1, len1, NULL); +} + + +INLINE int i2c_write_9(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len, + const void *buf1, size_t len1, + const void *buf2, size_t len2) +{ + return i2c->write(i2c, slave_addr, flags, buf, len, + buf1, len1, + buf2, len2, NULL); +} + +INLINE int i2c_read_9(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len, + void *buf1, size_t len1, + void *buf2, size_t len2) +{ + return i2c->read(i2c, slave_addr, flags, buf, len, + buf1, len1, + buf2, len2, NULL); +} + +INLINE int i2c_write_11(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len, + const void *buf1, size_t len1, + const void *buf2, size_t len2, + const void *buf3, size_t len3) +{ + return i2c->write(i2c, slave_addr, flags, buf, len, + buf1, len1, + buf2, len2, + buf3, len3, NULL); +} + +INLINE int i2c_read_11(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len, + void *buf1, size_t len1, + void *buf2, size_t len2, + void *buf3, size_t len3) + +{ + return i2c->read(i2c, slave_addr, flags, buf, len, + buf1, len1, + buf2, len2, + buf3, len3, NULL); +} + #endif