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CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_spi1.c

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+/********************************** (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.
+ * Attention: This software (modified or not) and binary are used for 
+ * microcontroller manufactured by Nanjing Qinheng Microelectronics.
+ *******************************************************************************/
+
+#include "CH58x_common.h"
+
+/*********************************************************************
+ * @fn      SPI1_MasterDefInit
+ *
+ * @brief   主机模式默认初始化：模式0+3线全双工+8MHz
+ *
+ * @param   none
+ *
+ * @return  none
+ */
+void SPI1_MasterDefInit(void)
+{
+    R8_SPI1_CLOCK_DIV = 4; // 主频时钟4分频
+    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; // 访问BUFFER/FIFO自动清除IF_BYTE_END标志
+}
+
+/*********************************************************************
+ * @fn      SPI1_CLKCfg
+ *
+ * @brief   SPI1 基准时钟配置，= d*Tsys
+ *
+ * @param   c       - 时钟分频系数
+ *
+ * @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   设置数据流模式
+ *
+ * @param   m       - 数据流模式 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   发送单字节 (buffer)
+ *
+ * @param   d       - 发送字节
+ *
+ * @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   接收单字节 (buffer)
+ *
+ * @param   none
+ *
+ * @return  接收到的字节
+ */
+uint8_t SPI1_MasterRecvByte(void)
+{
+    R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
+    R8_SPI1_BUFFER = 0xFF; // 启动传输
+    while(!(R8_SPI1_INT_FLAG & RB_SPI_FREE));
+    return (R8_SPI1_BUFFER);
+}
+
+/*********************************************************************
+ * @fn      SPI1_MasterTrans
+ *
+ * @brief   使用FIFO连续发送多字节
+ *
+ * @param   pbuf    - 待发送的数据内容首地址
+ * @param   len     - 请求发送的数据长度，最大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; // 设置数据方向为输出
+    R16_SPI1_TOTAL_CNT = sendlen;         // 设置要发送的数据长度
+    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); // 等待FIFO中的数据全部发送完成
+}
+
+/*********************************************************************
+ * @fn      SPI1_MasterRecv
+ *
+ * @brief   使用FIFO连续接收多字节
+ *
+ * @param   pbuf    - 待接收的数据首地址
+ * @param   len     - 待接收的数据长度，最大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; // 设置数据方向为输入
+    R16_SPI1_TOTAL_CNT = len;            // 设置需要接收的数据长度，FIFO方向为输入长度不为0则会启动传输 */
+    R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
+    while(readlen)
+    {
+        if(R8_SPI1_FIFO_COUNT)
+        {
+            *pbuf = R8_SPI1_FIFO;
+            pbuf++;
+            readlen--;
+        }
+    }
+}