diff options
Diffstat (limited to 'bsps/arm/atsam/include/bsp/atsam-i2c.h')
| -rw-r--r-- | bsps/arm/atsam/include/bsp/atsam-i2c.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/bsps/arm/atsam/include/bsp/atsam-i2c.h b/bsps/arm/atsam/include/bsp/atsam-i2c.h new file mode 100644 index 0000000000..7425db9f7b --- /dev/null +++ b/bsps/arm/atsam/include/bsp/atsam-i2c.h @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2016 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <info@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef LIBBSP_ARM_ATSAM_ATSAM_I2C_H +#define LIBBSP_ARM_ATSAM_ATSAM_I2C_H + +#include <libchip/chip.h> +#include <libchip/include/pio.h> + +#include <bsp.h> +#include <dev/i2c/i2c.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#define TWI_AMOUNT_PINS 2 + +typedef enum { + TX_SEND_DATA, + TX_SEND_STOP, + TX_CONT_MESSAGE_NEEDED, + RX_SEND_DATA, + RX_SEND_STOP, + RX_CONT_MESSAGE_NEEDED, + TX_RX_STOP_SENT +}transfer_state; + +typedef struct { + uint8_t status; + uint8_t *data; + bool stop_request; + uint32_t data_size; + uint32_t already_transferred; + transfer_state trans_state; +} transfer_desc; + +typedef struct { + i2c_bus base; + i2c_msg *msgs; + Twihs *regs; + transfer_desc trans_desc; + uint32_t msg_todo; + uint32_t current_msg_todo; + uint8_t *current_msg_byte; + uint32_t input_clock; + bool read; + rtems_id task_id; + rtems_vector_number irq; +} atsam_i2c_bus; + +int i2c_bus_register_atsam( + const char *bus_path, + Twihs *register_base, + rtems_vector_number irq, + const Pin pins[TWI_AMOUNT_PINS] +); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_ARM_ATSAM_ATSAM_I2C_H */ |