872 lines
21 KiB
C
872 lines
21 KiB
C
/**************************************************************************//**
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*
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* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
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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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* 2020-2-7 Wayne First version
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*
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******************************************************************************/
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#include <rtconfig.h>
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#if defined(BSP_USING_UART)
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#include <rtdevice.h>
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#include <rthw.h>
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#include <NuMicro.h>
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#include <drv_uart.h>
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#if defined(RT_SERIAL_USING_DMA)
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#include <drv_pdma.h>
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#endif
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/* Private define ---------------------------------------------------------------*/
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enum
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{
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UART_START = -1,
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#if defined(BSP_USING_UART0)
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UART0_IDX,
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#endif
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#if defined(BSP_USING_UART1)
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UART1_IDX,
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#endif
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#if defined(BSP_USING_UART2)
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UART2_IDX,
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#endif
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#if defined(BSP_USING_UART3)
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UART3_IDX,
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#endif
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#if defined(BSP_USING_UART4)
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UART4_IDX,
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#endif
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#if defined(BSP_USING_UART5)
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UART5_IDX,
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#endif
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#if defined(BSP_USING_UART6)
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UART6_IDX,
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#endif
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#if defined(BSP_USING_UART7)
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UART7_IDX,
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#endif
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UART_CNT
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};
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/* Private typedef --------------------------------------------------------------*/
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struct nu_uart
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{
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rt_serial_t dev;
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char *name;
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UART_T *uart_base;
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uint32_t uart_rst;
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IRQn_Type uart_irq_n;
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#if defined(RT_SERIAL_USING_DMA)
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uint32_t dma_flag;
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int16_t pdma_perp_tx;
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int8_t pdma_chanid_tx;
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int16_t pdma_perp_rx;
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int8_t pdma_chanid_rx;
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int32_t rx_write_offset;
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int32_t rxdma_trigger_len;
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#endif
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};
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typedef struct nu_uart *nu_uart_t;
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/* Private functions ------------------------------------------------------------*/
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static rt_err_t nu_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
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static rt_err_t nu_uart_control(struct rt_serial_device *serial, int cmd, void *arg);
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static int nu_uart_send(struct rt_serial_device *serial, char c);
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static int nu_uart_receive(struct rt_serial_device *serial);
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static void nu_uart_isr(nu_uart_t serial);
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#if defined(RT_SERIAL_USING_DMA)
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static rt_size_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction);
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static void nu_pdma_uart_rx_cb(void *pvOwner, uint32_t u32Events);
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static void nu_pdma_uart_tx_cb(void *pvOwner, uint32_t u32Events);
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#endif
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/* Public functions ------------------------------------------------------------*/
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/* Private variables ------------------------------------------------------------*/
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static const struct rt_uart_ops nu_uart_ops =
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{
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.configure = nu_uart_configure,
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.control = nu_uart_control,
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.putc = nu_uart_send,
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.getc = nu_uart_receive,
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#if defined(RT_SERIAL_USING_DMA)
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.dma_transmit = nu_uart_dma_transmit
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#else
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.dma_transmit = RT_NULL
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#endif
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};
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static const struct serial_configure nu_uart_default_config =
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RT_SERIAL_CONFIG_DEFAULT;
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static struct nu_uart nu_uart_arr [] =
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{
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#if defined(BSP_USING_UART0)
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{
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.name = "uart0",
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.uart_base = UART0,
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.uart_rst = UART0_RST,
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.uart_irq_n = UART0_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART0_TX_DMA)
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.pdma_perp_tx = PDMA_UART0_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART0_RX_DMA)
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.pdma_perp_rx = PDMA_UART0_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART1)
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{
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.name = "uart1",
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.uart_base = UART1,
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.uart_rst = UART1_RST,
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.uart_irq_n = UART1_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART1_TX_DMA)
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.pdma_perp_tx = PDMA_UART1_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART1_RX_DMA)
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.pdma_perp_rx = PDMA_UART1_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART2)
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{
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.name = "uart2",
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.uart_base = UART2,
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.uart_rst = UART2_RST,
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.uart_irq_n = UART2_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART2_TX_DMA)
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.pdma_perp_tx = PDMA_UART2_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART2_RX_DMA)
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.pdma_perp_rx = PDMA_UART2_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART3)
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{
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.name = "uart3",
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.uart_base = UART3,
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.uart_rst = UART3_RST,
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.uart_irq_n = UART3_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART3_TX_DMA)
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.pdma_perp_tx = PDMA_UART3_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART3_RX_DMA)
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.pdma_perp_rx = PDMA_UART3_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART4)
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{
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.name = "uart4",
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.uart_base = UART4,
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.uart_rst = UART4_RST,
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.uart_irq_n = UART4_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART4_TX_DMA)
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.pdma_perp_tx = PDMA_UART4_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART4_RX_DMA)
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.pdma_perp_rx = PDMA_UART4_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART5)
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{
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.name = "uart5",
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.uart_base = UART5,
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.uart_rst = UART5_RST,
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.uart_irq_n = UART5_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART5_TX_DMA)
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.pdma_perp_tx = PDMA_UART5_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART5_RX_DMA)
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.pdma_perp_rx = PDMA_UART5_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART6)
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{
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.name = "uart6",
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.uart_base = UART6,
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.uart_rst = UART6_RST,
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.uart_irq_n = UART6_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART6_TX_DMA)
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.pdma_perp_tx = PDMA_UART6_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART6_RX_DMA)
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.pdma_perp_rx = PDMA_UART6_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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#if defined(BSP_USING_UART7)
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{
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.name = "uart7",
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.uart_base = UART7,
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.uart_rst = UART7_RST,
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.uart_irq_n = UART7_IRQn,
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#if defined(RT_SERIAL_USING_DMA)
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#if defined(BSP_USING_UART7_TX_DMA)
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.pdma_perp_tx = PDMA_UART7_TX,
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#else
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.pdma_perp_tx = NU_PDMA_UNUSED,
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#endif
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#if defined(BSP_USING_UART7_RX_DMA)
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.pdma_perp_rx = PDMA_UART7_RX,
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.rx_write_offset = 0,
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#else
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.pdma_perp_rx = NU_PDMA_UNUSED,
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#endif
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#endif
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},
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#endif
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{0}
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}; /* uart nu_uart */
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/* Interrupt Handle Function ----------------------------------------------------*/
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#if defined(BSP_USING_UART0)
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/* UART0 interrupt entry */
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void UART0_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART0_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART1)
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/* UART1 interrupt entry */
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void UART1_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART1_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART2)
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/* UART2 interrupt entry */
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void UART2_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART2_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART3)
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/* UART3 interrupt service routine */
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void UART3_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART3_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART4)
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/* UART4 interrupt entry */
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void UART4_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART4_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART5)
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/* UART5 interrupt entry */
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void UART5_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART5_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART6)
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/* UART6 interrupt entry */
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void UART6_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART6_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#if defined(BSP_USING_UART7)
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/* UART7 interrupt entry */
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void UART7_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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nu_uart_isr(&nu_uart_arr[UART7_IDX]);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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/**
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* All UART interrupt service routine
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*/
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static void nu_uart_isr(nu_uart_t serial)
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{
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/* Get base address of uart register */
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UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
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/* Get interrupt event */
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uint32_t u32IntSts = uart_base->INTSTS;
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uint32_t u32FIFOSts = uart_base->FIFOSTS;
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#if defined(RT_SERIAL_USING_DMA)
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if (u32IntSts & UART_INTSTS_HWRLSIF_Msk)
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{
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/* Drain RX FIFO to remove remain FEF frames in FIFO. */
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uart_base->FIFO |= UART_FIFO_RXRST_Msk;
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uart_base->FIFOSTS |= (UART_FIFOSTS_BIF_Msk | UART_FIFOSTS_FEF_Msk | UART_FIFOSTS_PEF_Msk);
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return;
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}
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#endif
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/* Handle RX event */
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if (u32IntSts & (UART_INTSTS_RDAINT_Msk | UART_INTSTS_RXTOINT_Msk))
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{
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rt_hw_serial_isr(&serial->dev, RT_SERIAL_EVENT_RX_IND);
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}
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uart_base->INTSTS = u32IntSts;
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uart_base->FIFOSTS = u32FIFOSts;
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}
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/**
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* Configure uart port
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*/
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static rt_err_t nu_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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rt_err_t ret = RT_EOK;
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uint32_t uart_word_len = 0;
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uint32_t uart_stop_bit = 0;
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uint32_t uart_parity = 0;
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/* Get base address of uart register */
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UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
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/* Check baudrate */
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RT_ASSERT(cfg->baud_rate != 0);
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/* Check word len */
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switch (cfg->data_bits)
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{
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case DATA_BITS_5:
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uart_word_len = UART_WORD_LEN_5;
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break;
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case DATA_BITS_6:
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uart_word_len = UART_WORD_LEN_6;
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break;
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case DATA_BITS_7:
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uart_word_len = UART_WORD_LEN_7;
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break;
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case DATA_BITS_8:
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uart_word_len = UART_WORD_LEN_8;
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break;
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default:
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rt_kprintf("Unsupported data length");
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ret = RT_EINVAL;
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goto exit_nu_uart_configure;
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}
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/* Check stop bit */
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switch (cfg->stop_bits)
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{
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case STOP_BITS_1:
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uart_stop_bit = UART_STOP_BIT_1;
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break;
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case STOP_BITS_2:
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uart_stop_bit = UART_STOP_BIT_2;
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break;
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default:
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rt_kprintf("Unsupported stop bit");
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ret = RT_EINVAL;
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goto exit_nu_uart_configure;
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}
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/* Check parity */
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switch (cfg->parity)
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{
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case PARITY_NONE:
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uart_parity = UART_PARITY_NONE;
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break;
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case PARITY_ODD:
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uart_parity = UART_PARITY_ODD;
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break;
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case PARITY_EVEN:
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uart_parity = UART_PARITY_EVEN;
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break;
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default:
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rt_kprintf("Unsupported parity");
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ret = RT_EINVAL;
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goto exit_nu_uart_configure;
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}
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/* Reset this module */
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SYS_ResetModule(((nu_uart_t)serial)->uart_rst);
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/* Open Uart and set UART Baudrate */
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UART_Open(uart_base, cfg->baud_rate);
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/* Set line configuration. */
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UART_SetLineConfig(uart_base, 0, uart_word_len, uart_parity, uart_stop_bit);
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/* Enable NVIC interrupt. */
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NVIC_EnableIRQ(((nu_uart_t)serial)->uart_irq_n);
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exit_nu_uart_configure:
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if (ret != RT_EOK)
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UART_Close(uart_base);
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return -(ret);
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}
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#if defined(RT_SERIAL_USING_DMA)
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static rt_err_t nu_pdma_uart_rx_config(struct rt_serial_device *serial, uint8_t *pu8Buf, int32_t i32TriggerLen)
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{
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rt_err_t result = RT_EOK;
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|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
|
|
|
|
result = nu_pdma_callback_register(((nu_uart_t)serial)->pdma_chanid_rx,
|
|
nu_pdma_uart_rx_cb,
|
|
(void *)serial,
|
|
NU_PDMA_EVENT_TRANSFER_DONE | NU_PDMA_EVENT_TIMEOUT);
|
|
if (result != RT_EOK)
|
|
{
|
|
goto exit_nu_pdma_uart_rx_config;
|
|
}
|
|
|
|
result = nu_pdma_transfer(((nu_uart_t)serial)->pdma_chanid_rx,
|
|
8,
|
|
(uint32_t)uart_base,
|
|
(uint32_t)pu8Buf,
|
|
i32TriggerLen,
|
|
1000); //Idle-timeout, 1ms
|
|
if (result != RT_EOK)
|
|
{
|
|
goto exit_nu_pdma_uart_rx_config;
|
|
}
|
|
|
|
/* Enable Receive Line interrupt & Start DMA RX transfer. */
|
|
UART_ENABLE_INT(uart_base, UART_INTEN_RLSIEN_Msk);
|
|
UART_PDMA_ENABLE(uart_base, UART_INTEN_RXPDMAEN_Msk);
|
|
|
|
|
|
exit_nu_pdma_uart_rx_config:
|
|
|
|
return result;
|
|
}
|
|
|
|
static void nu_pdma_uart_rx_cb(void *pvOwner, uint32_t u32Events)
|
|
{
|
|
rt_size_t recv_len = 0;
|
|
rt_size_t transferred_rxbyte = 0;
|
|
struct rt_serial_device *serial = (struct rt_serial_device *)pvOwner;
|
|
nu_uart_t puart = (nu_uart_t)serial;
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = puart->uart_base;
|
|
|
|
transferred_rxbyte = nu_pdma_transferred_byte_get(puart->pdma_chanid_rx, puart->rxdma_trigger_len);
|
|
|
|
if (u32Events & (NU_PDMA_EVENT_TRANSFER_DONE | NU_PDMA_EVENT_TIMEOUT))
|
|
{
|
|
if (u32Events & NU_PDMA_EVENT_TRANSFER_DONE)
|
|
{
|
|
if (serial->config.bufsz != 0)
|
|
{
|
|
struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
|
|
|
|
nu_pdma_uart_rx_config(serial, &rx_fifo->buffer[0], puart->rxdma_trigger_len); // Config & trigger next
|
|
}
|
|
else
|
|
{
|
|
UART_DISABLE_INT(uart_base, UART_INTEN_RLSIEN_Msk);
|
|
UART_PDMA_DISABLE(uart_base, UART_INTEN_RXPDMAEN_Msk);
|
|
}
|
|
transferred_rxbyte = puart->rxdma_trigger_len;
|
|
}
|
|
else if ((u32Events & NU_PDMA_EVENT_TIMEOUT) && !UART_GET_RX_EMPTY(uart_base))
|
|
{
|
|
return;
|
|
}
|
|
|
|
recv_len = transferred_rxbyte - puart->rx_write_offset;
|
|
|
|
puart->rx_write_offset = transferred_rxbyte % puart->rxdma_trigger_len;
|
|
|
|
}
|
|
|
|
if ((serial->config.bufsz == 0) && (u32Events & NU_PDMA_EVENT_TRANSFER_DONE))
|
|
{
|
|
recv_len = puart->rxdma_trigger_len;
|
|
}
|
|
|
|
if (recv_len)
|
|
{
|
|
rt_hw_serial_isr(&puart->dev, RT_SERIAL_EVENT_RX_DMADONE | (recv_len << 8));
|
|
}
|
|
}
|
|
|
|
static rt_err_t nu_pdma_uart_tx_config(struct rt_serial_device *serial)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
result = nu_pdma_callback_register(((nu_uart_t)serial)->pdma_chanid_tx,
|
|
nu_pdma_uart_tx_cb,
|
|
(void *)serial,
|
|
NU_PDMA_EVENT_TRANSFER_DONE);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void nu_pdma_uart_tx_cb(void *pvOwner, uint32_t u32Events)
|
|
{
|
|
nu_uart_t puart = (nu_uart_t)pvOwner;
|
|
|
|
RT_ASSERT(puart != RT_NULL);
|
|
|
|
UART_PDMA_DISABLE(puart->uart_base, UART_INTEN_TXPDMAEN_Msk);// Stop DMA TX transfer
|
|
|
|
if (u32Events & NU_PDMA_EVENT_TRANSFER_DONE)
|
|
{
|
|
rt_hw_serial_isr(&puart->dev, RT_SERIAL_EVENT_TX_DMADONE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Uart DMA transfer
|
|
*/
|
|
static rt_size_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
RT_ASSERT(buf != RT_NULL);
|
|
|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
|
|
if (direction == RT_SERIAL_DMA_TX)
|
|
{
|
|
result = nu_pdma_transfer(((nu_uart_t)serial)->pdma_chanid_tx,
|
|
8,
|
|
(uint32_t)buf,
|
|
(uint32_t)uart_base,
|
|
size,
|
|
0); // wait-forever
|
|
UART_PDMA_ENABLE(uart_base, UART_INTEN_TXPDMAEN_Msk); // Start DMA TX transfer
|
|
}
|
|
else if (direction == RT_SERIAL_DMA_RX)
|
|
{
|
|
UART_DISABLE_INT(uart_base, UART_INTEN_RLSIEN_Msk);
|
|
UART_PDMA_DISABLE(uart_base, UART_INTEN_RXPDMAEN_Msk);
|
|
// If config.bufsz = 0, serial will trigger once.
|
|
((nu_uart_t)serial)->rxdma_trigger_len = size;
|
|
((nu_uart_t)serial)->rx_write_offset = 0;
|
|
result = nu_pdma_uart_rx_config(serial, buf, size);
|
|
}
|
|
else
|
|
{
|
|
result = RT_ERROR;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int nu_hw_uart_dma_allocate(nu_uart_t pusrt)
|
|
{
|
|
RT_ASSERT(pusrt != RT_NULL);
|
|
|
|
/* Allocate UART_TX nu_dma channel */
|
|
if (pusrt->pdma_perp_tx != NU_PDMA_UNUSED)
|
|
{
|
|
pusrt->pdma_chanid_tx = nu_pdma_channel_allocate(pusrt->pdma_perp_tx);
|
|
if (pusrt->pdma_chanid_tx >= 0)
|
|
{
|
|
pusrt->dma_flag |= RT_DEVICE_FLAG_DMA_TX;
|
|
}
|
|
}
|
|
|
|
/* Allocate UART_RX nu_dma channel */
|
|
if (pusrt->pdma_perp_rx != NU_PDMA_UNUSED)
|
|
{
|
|
pusrt->pdma_chanid_rx = nu_pdma_channel_allocate(pusrt->pdma_perp_rx);
|
|
if (pusrt->pdma_chanid_rx >= 0)
|
|
{
|
|
pusrt->dma_flag |= RT_DEVICE_FLAG_DMA_RX;
|
|
}
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Uart interrupt control
|
|
*/
|
|
static rt_err_t nu_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
rt_uint32_t flag;
|
|
rt_ubase_t ctrl_arg = (rt_ubase_t)arg;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
|
|
|
|
switch (cmd)
|
|
{
|
|
case RT_DEVICE_CTRL_CLR_INT:
|
|
if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) /* Disable INT-RX */
|
|
{
|
|
flag = UART_INTEN_RDAIEN_Msk | UART_INTEN_RXTOIEN_Msk | UART_INTEN_TOCNTEN_Msk;
|
|
UART_DISABLE_INT(uart_base, flag);
|
|
}
|
|
else if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) /* Disable DMA-RX */
|
|
{
|
|
/* Disable Receive Line interrupt & Stop DMA RX transfer. */
|
|
#if defined(RT_SERIAL_USING_DMA)
|
|
nu_pdma_channel_terminate(((nu_uart_t)serial)->pdma_chanid_rx);
|
|
UART_DISABLE_INT(uart_base, UART_INTEN_RLSIEN_Msk);
|
|
UART_PDMA_DISABLE(uart_base, UART_INTEN_RXPDMAEN_Msk);
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case RT_DEVICE_CTRL_SET_INT:
|
|
if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) /* Enable INT-RX */
|
|
{
|
|
flag = UART_INTEN_RDAIEN_Msk | UART_INTEN_RXTOIEN_Msk | UART_INTEN_TOCNTEN_Msk;
|
|
UART_ENABLE_INT(uart_base, flag);
|
|
}
|
|
break;
|
|
|
|
#if defined(RT_SERIAL_USING_DMA)
|
|
case RT_DEVICE_CTRL_CONFIG:
|
|
if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) /* Configure and trigger DMA-RX */
|
|
{
|
|
struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
|
|
((nu_uart_t)serial)->rxdma_trigger_len = serial->config.bufsz;
|
|
((nu_uart_t)serial)->rx_write_offset = 0;
|
|
result = nu_pdma_uart_rx_config(serial, &rx_fifo->buffer[0], ((nu_uart_t)serial)->rxdma_trigger_len); // Config & trigger
|
|
}
|
|
else if (ctrl_arg == RT_DEVICE_FLAG_DMA_TX) /* Configure DMA-TX */
|
|
{
|
|
result = nu_pdma_uart_tx_config(serial);
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case RT_DEVICE_CTRL_CLOSE:
|
|
/* Disable NVIC interrupt. */
|
|
NVIC_DisableIRQ(((nu_uart_t)serial)->uart_irq_n);
|
|
|
|
#if defined(RT_SERIAL_USING_DMA)
|
|
nu_pdma_channel_terminate(((nu_uart_t)serial)->pdma_chanid_tx);
|
|
nu_pdma_channel_terminate(((nu_uart_t)serial)->pdma_chanid_rx);
|
|
#endif
|
|
|
|
/* Reset this module */
|
|
SYS_ResetModule(((nu_uart_t)serial)->uart_rst);
|
|
|
|
/* Close UART port */
|
|
UART_Close(uart_base);
|
|
|
|
break;
|
|
|
|
default:
|
|
result = -RT_EINVAL;
|
|
break;
|
|
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Uart put char
|
|
*/
|
|
static int nu_uart_send(struct rt_serial_device *serial, char c)
|
|
{
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
|
|
|
|
/* Waiting if TX-FIFO is full. */
|
|
while (UART_IS_TX_FULL(uart_base));
|
|
|
|
/* Put char into TX-FIFO */
|
|
UART_WRITE(uart_base, c);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Uart get char
|
|
*/
|
|
static int nu_uart_receive(struct rt_serial_device *serial)
|
|
{
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
/* Get base address of uart register */
|
|
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
|
|
|
|
/* Return failure if RX-FIFO is empty. */
|
|
if (UART_GET_RX_EMPTY(uart_base))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/* Get char from RX-FIFO */
|
|
return UART_READ(uart_base);
|
|
}
|
|
|
|
/**
|
|
* Hardware UART Initialization
|
|
*/
|
|
rt_err_t rt_hw_uart_init(void)
|
|
{
|
|
int i;
|
|
rt_uint32_t flag;
|
|
rt_err_t ret = RT_EOK;
|
|
|
|
for (i = (UART_START + 1); i < UART_CNT; i++)
|
|
{
|
|
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
|
|
|
|
nu_uart_arr[i].dev.ops = &nu_uart_ops;
|
|
nu_uart_arr[i].dev.config = nu_uart_default_config;
|
|
|
|
#if defined(RT_SERIAL_USING_DMA)
|
|
nu_uart_arr[i].dma_flag = 0;
|
|
nu_hw_uart_dma_allocate(&nu_uart_arr[i]);
|
|
flag |= nu_uart_arr[i].dma_flag;
|
|
#endif
|
|
|
|
ret = rt_hw_serial_register(&nu_uart_arr[i].dev, nu_uart_arr[i].name, flag, NULL);
|
|
RT_ASSERT(ret == RT_EOK);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif //#if defined(BSP_USING_UART)
|