pikapython/bsp/ch582/StdPeriphDriver/CH58x_spi1.c

/********************************** (C) COPYRIGHT *******************************
 * File Name          : CH58x_SPI1.c
 * Author             : WCH
 * Version            : V1.0
 * Date               : 2018/12/15
 * Description
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * SPDX-License-Identifier: Apache-2.0
 *******************************************************************************/

#include "CH58x_common.h"

/*********************************************************************
 * @fn      SPI1_MasterDefInit
 *
 * @brief   <20><><EFBFBD><EFBFBD>ģʽĬ<CABD>ϳ<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ģʽ0+3<><33>ȫ˫<C8AB><CBAB>+8MHz
 *
 * @param   none
 *
 * @return  none
 */
void SPI1_MasterDefInit(void)
{
    R8_SPI1_CLOCK_DIV = 4; // <20><>Ƶʱ<C6B5><CAB1>4<EFBFBD><34>Ƶ
    R8_SPI1_CTRL_MOD = RB_SPI_ALL_CLEAR;
    R8_SPI1_CTRL_MOD = RB_SPI1_SDO_OE | RB_SPI_SCK_OE;
    R8_SPI1_CTRL_CFG |= RB_SPI_AUTO_IF; // <20><><EFBFBD><EFBFBD>BUFFER/FIFO<46>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD>IF_BYTE_END<4E><44>־
}

/*********************************************************************
 * @fn      SPI1_CLKCfg
 *
 * @brief   SPI1 <20><>׼ʱ<D7BC><CAB1><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD>= d*Tsys
 *
 * @param   c       - ʱ<>ӷ<EFBFBD>Ƶϵ<C6B5><CFB5>
 *
 * @return  none
 */
void SPI1_CLKCfg(uint8_t c)
{
    if(c == 2)
    {
        R8_SPI1_CTRL_CFG |= RB_SPI_MST_DLY_EN;
    }
    else
    {
        R8_SPI1_CTRL_CFG &= ~RB_SPI_MST_DLY_EN;
    }
    R8_SPI1_CLOCK_DIV = c;
}

/*********************************************************************
 * @fn      SPI1_DataMode
 *
 * @brief   <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
 *
 * @param   m       - <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ refer to ModeBitOrderTypeDef
 *
 * @return  none
 */
void SPI1_DataMode(ModeBitOrderTypeDef m)
{
    switch(m)
    {
        case Mode0_LowBitINFront:
            R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
            R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
            break;
        case Mode0_HighBitINFront:
            R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
            R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
            break;
        case Mode3_LowBitINFront:
            R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
            R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
            break;
        case Mode3_HighBitINFront:
            R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
            R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
            break;
        default:
            break;
    }
}

/*********************************************************************
 * @fn      SPI1_MasterSendByte
 *
 * @brief   <20><><EFBFBD>͵<EFBFBD><CDB5>ֽ<EFBFBD> (buffer)
 *
 * @param   d       - <20><><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>
 *
 * @return  none
 */
void SPI1_MasterSendByte(uint8_t d)
{
    R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
    R8_SPI1_BUFFER = d;
    while(!(R8_SPI1_INT_FLAG & RB_SPI_FREE));
}

/*********************************************************************
 * @fn      SPI1_MasterRecvByte
 *
 * @brief   <20><><EFBFBD>յ<EFBFBD><D5B5>ֽ<EFBFBD> (buffer)
 *
 * @param   none
 *
 * @return  <20><><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD>ֽ<EFBFBD>
 */
uint8_t SPI1_MasterRecvByte(void)
{
    R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
    R8_SPI1_BUFFER = 0xFF; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    while(!(R8_SPI1_INT_FLAG & RB_SPI_FREE));
    return (R8_SPI1_BUFFER);
}

/*********************************************************************
 * @fn      SPI1_MasterTrans
 *
 * @brief   ʹ<><CAB9>FIFO<46><4F><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͷ<EFBFBD><CDB6>ֽ<EFBFBD>
 *
 * @param   pbuf    - <20><><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD><CDB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>׵<EFBFBD>ַ
 * @param   len     - <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD><CDB5><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3>ȣ<EFBFBD><C8A3><EFBFBD><EFBFBD><EFBFBD>4095
 *
 * @return  none
 */
void SPI1_MasterTrans(uint8_t *pbuf, uint16_t len)
{
    uint16_t sendlen;

    sendlen = len;
    R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><DDB7><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>
    R16_SPI1_TOTAL_CNT = sendlen;         // <20><><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>͵<EFBFBD><CDB5><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3><EFBFBD>
    R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
    while(sendlen)
    {
        if(R8_SPI1_FIFO_COUNT < SPI_FIFO_SIZE)
        {
            R8_SPI1_FIFO = *pbuf;
            pbuf++;
            sendlen--;
        }
    }
    while(R8_SPI1_FIFO_COUNT != 0); // <20>ȴ<EFBFBD>FIFO<46>е<EFBFBD><D0B5><EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}

/*********************************************************************
 * @fn      SPI1_MasterRecv
 *
 * @brief   ʹ<><CAB9>FIFO<46><4F><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ն<EFBFBD><D5B6>ֽ<EFBFBD>
 *
 * @param   pbuf    - <20><><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>׵<EFBFBD>ַ
 * @param   len     - <20><><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3>ȣ<EFBFBD><C8A3><EFBFBD><EFBFBD><EFBFBD>4095
 *
 * @return  none
 */
void SPI1_MasterRecv(uint8_t *pbuf, uint16_t len)
{
    uint16_t readlen;

    readlen = len;
    R8_SPI1_CTRL_MOD |= RB_SPI_FIFO_DIR; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><DDB7><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>
    R16_SPI1_TOTAL_CNT = len;            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3>ȣ<EFBFBD>FIFO<46><4F><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>볤<EFBFBD>Ȳ<EFBFBD>Ϊ0<CEAA><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
    R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
    while(readlen)
    {
        if(R8_SPI1_FIFO_COUNT)
        {
            *pbuf = R8_SPI1_FIFO;
            pbuf++;
            readlen--;
        }
    }
}