254 lines
6.1 KiB
C
254 lines
6.1 KiB
C
/*
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* Copyright (c) 2006-2020, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-04-28 xckhmf Modify for <nrfx>
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*
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*/
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#include <rtdevice.h>
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#include <nrfx_uart.h>
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#include "drv_uart.h"
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#ifdef BSP_USING_UART
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typedef struct
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{
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struct rt_serial_device *serial;
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nrfx_uart_t uart;
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uint8_t rx_byte;
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uint16_t rx_length;
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uint32_t rx_pin;
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uint32_t tx_pin;
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nrfx_uart_event_handler_t event_handler;
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} drv_uart_cfg_t;
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#ifdef BSP_USING_UART0
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static struct rt_serial_device _serial_0;
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static void uart0_event_hander(nrfx_uart_event_t const *p_event,void *p_context);
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drv_uart_cfg_t m_uart0_cfg = {
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.uart = NRFX_UART_INSTANCE(0),
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.rx_byte = 0,
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.rx_length = 0,
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.rx_pin = BSP_UART0_RX_PIN,
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.tx_pin = BSP_UART0_TX_PIN,
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.event_handler = uart0_event_hander
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};
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#endif /* BSP_USING_UART0 */
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#ifdef BSP_USING_UART1
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#error <nrfx_uart> not support UART1. Use UART0 instead.
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#endif /* BSP_USING_UART1 */
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#ifdef BSP_USING_UART0
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static void uart0_event_hander(nrfx_uart_event_t const *p_event,void *p_context)
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{
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if (p_event->type == NRFX_UART_EVT_RX_DONE)
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{
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if(p_event->data.rxtx.bytes == 1)
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{
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m_uart0_cfg.rx_length = p_event->data.rxtx.bytes;
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/* rx_byte equal p_data */
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//m_uart0_cfg.rx_byte = *(p_event->data.rxtx.p_data);
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rt_hw_serial_isr(m_uart0_cfg.serial, RT_SERIAL_EVENT_RX_IND);
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}
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nrfx_uart_rx(&(m_uart0_cfg.uart),&m_uart0_cfg.rx_byte,1);
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}
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if (p_event->type == NRFX_UART_EVT_TX_DONE)
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{
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/* @TODO:[RT_DEVICE_FLAG_INT_TX]*/
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}
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}
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#endif /* BSP_USING_UART0 */
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static rt_err_t _uart_cfg(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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nrfx_uart_config_t config = NRFX_UART_DEFAULT_CONFIG(BSP_UART0_TX_PIN,BSP_UART0_RX_PIN);
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drv_uart_cfg_t *instance = RT_NULL;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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if (serial->parent.user_data == RT_NULL)
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{
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return -RT_ERROR;
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}
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instance = (drv_uart_cfg_t*)serial->parent.user_data;
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nrfx_uart_uninit(&(instance->uart));
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switch (cfg->baud_rate)
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{
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case 115200:
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config.baudrate = NRF_UART_BAUDRATE_115200;
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break;
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case 9600:
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config.baudrate = NRF_UART_BAUDRATE_9600;
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break;
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default:
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config.baudrate = NRF_UART_BAUDRATE_115200;
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break;
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}
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if (cfg->parity == PARITY_NONE)
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{
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config.hal_cfg.parity = NRF_UART_PARITY_EXCLUDED;
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}
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else
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{
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config.hal_cfg.parity = NRF_UART_PARITY_INCLUDED;
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}
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config.hal_cfg.hwfc = NRF_UART_HWFC_DISABLED;
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config.pselrxd = instance->rx_pin;
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config.pseltxd = instance->tx_pin;
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nrfx_uart_init(&(instance->uart), &config, instance->event_handler);
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nrfx_uart_rx(&(instance->uart),&(instance->rx_byte),1);
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nrf_uart_int_disable(instance->uart.p_reg, NRF_UART_INT_MASK_TXDRDY);
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return RT_EOK;
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}
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static rt_err_t _uart_ctrl(struct rt_serial_device *serial, int cmd, void *arg)
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{
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drv_uart_cfg_t *instance = NULL;
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RT_ASSERT(serial != RT_NULL);
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if (serial->parent.user_data == RT_NULL)
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{
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return -RT_ERROR;
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}
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instance = (drv_uart_cfg_t*)serial->parent.user_data;
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switch (cmd)
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{
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/* disable interrupt */
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case RT_DEVICE_CTRL_CLR_INT:
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break;
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/* enable interrupt */
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case RT_DEVICE_CTRL_SET_INT:
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break;
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case RT_DEVICE_CTRL_CUSTOM:
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if ((rt_uint32_t)(arg) == UART_CONFIG_BAUD_RATE_9600)
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{
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instance->serial->config.baud_rate = 9600;
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}
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else if ((rt_uint32_t)(arg) == UART_CONFIG_BAUD_RATE_115200)
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{
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instance->serial->config.baud_rate = 115200;
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}
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_uart_cfg(instance->serial, &(instance->serial->config));
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break;
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case RT_DEVICE_CTRL_PIN:
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_uart_cfg(instance->serial, &(instance->serial->config));
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break;
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case RT_DEVICE_POWERSAVE:
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nrfx_uart_uninit(&(instance->uart));
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break;
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case RT_DEVICE_WAKEUP:
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_uart_cfg(instance->serial, &(instance->serial->config));
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break;
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default:
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return RT_ERROR;
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}
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return RT_EOK;
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}
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RT_WEAK int uart_putc_hook(rt_uint8_t *ch)
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{
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return -1;
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}
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static int _uart_putc(struct rt_serial_device *serial, char c)
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{
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drv_uart_cfg_t *instance = NULL;
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int rtn = 1;
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RT_ASSERT(serial != RT_NULL);
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if (serial->parent.user_data != RT_NULL)
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{
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instance = (drv_uart_cfg_t*)serial->parent.user_data;
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}
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nrf_uart_event_clear(instance->uart.p_reg, NRF_UART_EVENT_TXDRDY);
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nrf_uart_task_trigger(instance->uart.p_reg, NRF_UART_TASK_STARTTX);
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nrf_uart_txd_set(instance->uart.p_reg, (uint8_t)c);
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uart_putc_hook((rt_uint8_t *)&c);
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while (!nrf_uart_event_check(instance->uart.p_reg, NRF_UART_EVENT_TXDRDY))
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{
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//wait for TXD send
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}
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return rtn;
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}
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RT_WEAK int uart_getc_hook(rt_uint8_t *ch)
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{
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return -1;
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};
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static int _uart_getc(struct rt_serial_device *serial)
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{
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int ch = -1;
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drv_uart_cfg_t *instance = NULL;
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RT_ASSERT(serial != RT_NULL);
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if (serial->parent.user_data != RT_NULL)
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{
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instance = (drv_uart_cfg_t*)serial->parent.user_data;
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}
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if(instance->rx_length)
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{
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ch = instance->rx_byte;
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instance->rx_length--;
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}
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if (-1 != ch)
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{
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return ch;
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}
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else
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{
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if (-1 == uart_getc_hook((rt_uint8_t *)&ch))
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{
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return -1;
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}
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else
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{
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return ch;
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}
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}
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}
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static struct rt_uart_ops _uart_ops = {
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_uart_cfg,
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_uart_ctrl,
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_uart_putc,
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_uart_getc
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};
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void rt_hw_uart_init(void)
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{
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#ifdef BSP_USING_UART0
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_serial_0.config = config;
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_serial_0.ops = &_uart_ops;
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m_uart0_cfg.serial = &_serial_0;
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rt_hw_serial_register(&_serial_0, "uart0", \
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, &m_uart0_cfg);
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#endif /* BSP_USING_UART0 */
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}
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#endif /* BSP_USING_UART */
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