circuitpython/nrf5/hal/hal_uart.h

136 lines
6.6 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Glenn Ruben Bakke
*
* 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 HAL_UART_H__
#define HAL_UART_H__
#include <stdint.h>
#include <stdbool.h>
#include "nrf.h"
#if NRF51
#define UART_HWCONTROL_NONE ((uint32_t)UART_CONFIG_HWFC_Disabled << UART_CONFIG_HWFC_Pos)
#define UART_HWCONTROL_RTS_CTS ((uint32_t)(UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos)
#define IS_UART_HARDWARE_FLOW_CONTROL(CONTROL)\
(((CONTROL) == UART_HWCONTROL_NONE) || \
((CONTROL) == UART_HWCONTROL_RTS_CTS))
#elif NRF52
#define UART_HWCONTROL_NONE ((uint32_t)UARTE_CONFIG_HWFC_Disabled << UARTE_CONFIG_HWFC_Pos)
#define UART_HWCONTROL_RTS_CTS ((uint32_t)(UARTE_CONFIG_HWFC_Enabled << UARTE_CONFIG_HWFC_Pos)
#define IS_UART_HARDWARE_FLOW_CONTROL(CONTROL)\
(((CONTROL) == UART_HWCONTROL_NONE) || \
((CONTROL) == UART_HWCONTROL_RTS_CTS))
#else
#error "Device not supported."
#endif
typedef enum {
HAL_UART_STATE_RESET = 0x00, /*!< Peripheral is not yet Initialized */
HAL_UART_STATE_READY = 0x01, /*!< Peripheral Initialized and ready for use */
HAL_UART_STATE_BUSY = 0x02, /*!< an internal process is ongoing */
HAL_UART_STATE_BUSY_TX = 0x12, /*!< Data Transmission process is ongoing */
HAL_UART_STATE_BUSY_RX = 0x22, /*!< Data Reception process is ongoing */
HAL_UART_STATE_BUSY_TX_RX = 0x32, /*!< Data Transmission and Reception process is ongoing */
HAL_UART_STATE_TIMEOUT = 0x03, /*!< Timeout state */
HAL_UART_STATE_ERROR = 0x04 /*!< Error */
} HAL_UART_StateTypeDef;
typedef enum
{
HAL_UART_ERROR_NONE = 0x00, /*!< No error */
HAL_UART_ERROR_ORE = 0x01, /*!< Overrun error. A start bit is received while the previous data still lies in RXD. (Previous data is lost.) */
HAL_UART_ERROR_PE = 0x02, /*!< Parity error. A character with bad parity is received, if HW parity check is enabled. */
HAL_UART_ERROR_FE = 0x04, /*!< Frame error. A valid stop bit is not detected on the serial data input after all bits in a character have been received. */
HAL_UART_ERROR_BE = 0x08, /*!< Break error. The serial data input is '0' for longer than the length of a data frame. (The data frame length is 10 bits without parity bit, and 11 bits with parity bit.). */
} HAL_UART_ErrorTypeDef;
typedef enum {
HAL_UART_BAUD_1K2 = 0, /**< 1200 baud */
HAL_UART_BAUD_2K4, /**< 2400 baud */
HAL_UART_BAUD_4K8, /**< 4800 baud */
HAL_UART_BAUD_9K6, /**< 9600 baud */
HAL_UART_BAUD_14K4, /**< 14.4 kbaud */
HAL_UART_BAUD_19K2, /**< 19.2 kbaud */
HAL_UART_BAUD_28K8, /**< 28.8 kbaud */
HAL_UART_BAUD_38K4, /**< 38.4 kbaud */
HAL_UART_BAUD_57K6, /**< 57.6 kbaud */
HAL_UART_BAUD_76K8, /**< 76.8 kbaud */
HAL_UART_BAUD_115K2, /**< 115.2 kbaud */
HAL_UART_BAUD_230K4, /**< 230.4 kbaud */
HAL_UART_BAUD_250K0, /**< 250.0 kbaud */
HAL_UART_BAUD_500K0, /**< 500.0 kbaud */
HAL_UART_BAUD_1M0 /**< 1 mbaud */
} hal_uart_baudrate_t;
typedef struct {
uint32_t baud_rate;
uint32_t flow_control;
} UART_InitTypeDef;
typedef struct
{
NRF_UART_Type *instance; /* UART registers base address */
UART_InitTypeDef init; /* UART communication parameters */
uint8_t *p_tx_buff; /* Pointer to UART Tx transfer Buffer */
uint16_t tx_xfer_size; /* UART Tx Transfer size */
uint16_t tx_xfer_count; /* UART Tx Transfer Counter */
uint8_t *p_rx_buff; /* Pointer to UART Rx transfer Buffer */
uint16_t rx_xfer_size; /* UART Rx Transfer size */
uint16_t rx_xfer_count; /* UART Rx Transfer Counter */
__IO HAL_UART_StateTypeDef state; /* UART communication state */
__IO HAL_UART_ErrorTypeDef error_code; /* UART Error code */
} UART_HandleTypeDef;
typedef struct {
const pin_obj_t * rx_pin; /**< RX pin. */
const pin_obj_t * tx_pin; /**< TX pin. */
const pin_obj_t * rts_pin; /**< RTS pin, only used if flow control is enabled. */
const pin_obj_t * cts_pin; /**< CTS pin, only used if flow control is enabled. */
bool flow_control; /**< Flow control setting, if flow control is used, the system will use low power UART mode, based on CTS signal. */
bool use_parity; /**< Even parity if TRUE, no parity if FALSE. */
uint32_t baud_rate; /**< Baud rate configuration. */
uint32_t irq_priority; /**< UARTE IRQ priority. */
} hal_uart_init_t;
typedef void (*uart_complete_cb)(void);
void nrf_uart_init(hal_uart_init_t const * p_uart_init);
void nrf_uart_char_write(uint8_t ch);
uint8_t nrf_uart_char_read(void);
void nrf_uart_buffer_write(uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb);
void nrf_uart_buffer_read(uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb);
#endif // UART_H__