295 lines
8.3 KiB
C
295 lines
8.3 KiB
C
#include "ch438q.h"
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#include "fsmc.h"
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#include "ht1200m.h"
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#define CH438_CLK 1843200 /* CH438的内部时钟频率，默认外部晶振的12分频 */
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const uint8_t offsetadd[] = {
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0x00,
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0x10,
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0x20,
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0x30,
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0x08,
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0x18,
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0x28,
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0x38,
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}; /* 串口号的偏移地址 */
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const uint8_t Interruptnum[] = {
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0x01,
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0x02,
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0x04,
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0x08,
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0x10,
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0x20,
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0x40,
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0x80,
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}; /* SSR寄存器中断号对应值 */
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uint8_t receive_data_buff[256];
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uint8_t receive_data_len;
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static void ch438_tranconfig(uint8_t uart_num);
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static void ch438_set_baudrate(uint8_t uart_num, uint32_t baudrate);
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/**
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* @brief 配置串口通信参数
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*
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* 设置串口通讯的格式，8个数据位，1个停止位，1个校验位，奇校验，并设置FIFO模式，触发点为112个字节。
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*
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* @param uart_num 串口编号
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*/
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void ch438_tranconfig(uint8_t uart_num)
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{
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// 设置串口通讯的格式，8个数据位，1个停止位，1个校验位，奇校验
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ch438_write_reg(offsetadd[uart_num] | REG_LCR_ADDR, BIT_LCR_PAREN | BIT_LCR_WORDSZ1 | BIT_LCR_WORDSZ0, 1);
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/* 设置FIFO模式，触发点为112个字节 */
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ch438_write_reg(offsetadd[uart_num] | REG_FCR_ADDR, BIT_FCR_RECVTG0 | BIT_FCR_RECVTG1 | BIT_FCR_FIFOEN, 1);
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}
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/**
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* @brief 设置CH438 UART的波特率
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*
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* 通过修改CH438 UART的波特率寄存器来设置指定UART的波特率。
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*
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* @param uart_num UART编号
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* @param baudrate 需要设置的波特率
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*/
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static void ch438_set_baudrate(uint8_t uart_num, uint32_t baudrate)
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{
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uint8_t dlab = 0;
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uint16_t bandspeed;
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dlab = ch438_read_reg(offsetadd[uart_num] | REG_LCR_ADDR, 1);
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dlab |= 0x80; // 置LCR寄存器的DLAB位为1
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ch438_write_reg(offsetadd[uart_num] | REG_LCR_ADDR, dlab, 1);
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bandspeed = CH438_CLK / 16 / baudrate;
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ch438_write_reg(offsetadd[uart_num] | REG_DLL_ADDR, (uint8_t)bandspeed, 1);
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ch438_write_reg(offsetadd[uart_num] | REG_DLM_ADDR, (uint8_t)(bandspeed >> 8), 1);
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dlab &= 0x7F; // 置LCR寄存器的DLAB位为0
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ch438_write_reg(offsetadd[uart_num] | REG_LCR_ADDR, dlab, 1);
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}
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/**
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* @brief 向CH438寄存器写入数据
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*
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* 该函数用于向CH438芯片的指定寄存器写入指定大小的数据。
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*
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* @param addr 要写入的寄存器地址
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* @param data 要写入的数据
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* @param size 要写入的数据大小（以字节为单位）
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*/
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void ch438_write_reg(uint8_t addr, uint8_t data, uint8_t size)
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{
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uint32_t *address = (uint32_t *)(0x60000000 + addr);
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HAL_SRAM_Write_8b(&hsram1, address, &data, size);
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}
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/**
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* @brief 从CH438的寄存器中读取数据
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*
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* 从指定的地址读取指定大小的数据。
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*
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* @param addr 寄存器地址
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* @param size 要读取的数据大小（以字节为单位）
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*
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* @return 读取到的数据
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*/
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uint8_t ch438_read_reg(uint8_t addr, uint8_t size)
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{
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uint8_t data = 0;
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uint32_t *address = (uint32_t *)(0x60000000 + addr);
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HAL_SRAM_Read_8b(&hsram1, address, &data, size);
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return data;
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}
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void ch438_test(void)
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{
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uint8_t reg_data[16] = {0};
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reg_data[0] = 0xAA;
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ch438_write_reg(offsetadd[0] | REG_SCR_ADDR, reg_data[0], 1);
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reg_data[1] = ch438_read_reg(offsetadd[0] | REG_SCR_ADDR, 1);
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reg_data[2] = ch438_read_reg(offsetadd[0] | REG_IER_ADDR, 1);
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reg_data[3] = ch438_read_reg(offsetadd[0] | REG_IIR_ADDR, 1);
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reg_data[4] = ch438_read_reg(offsetadd[0] | REG_LCR_ADDR, 1);
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}
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/**
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* @brief 重置所有UART
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*
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* 该函数用于重置所有UART设备。
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*
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* @return 无
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*/
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void ch438_reset_all_uart(void)
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{
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for (uint8_t i = 0; i < 8; i++)
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{
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ch438_write_reg(offsetadd[CH438_UART0 + i] | REG_IER_ADDR, BIT_IER_RESET, 1);
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}
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}
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/**
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* @brief 关闭指定UART的电源
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*
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* 关闭指定UART的电源，使UART进入低功耗模式。
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*
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* @param uart_num UART编号，取值范围为0到3
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*/
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void ch438_close_uart(uint8_t uart_num)
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{
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ch438_write_reg(offsetadd[uart_num] | REG_IER_ADDR, BIT_IER_LOWPOWER, 1);
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}
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/**
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* @brief 关闭所有UART串口
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*
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* 关闭CH438芯片上的所有UART串口。
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*
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* 具体操作是向CH438的IER寄存器（中断使能寄存器）写入特定值，
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* 将SLP（休眠模式使能位）和LOWPOWER（低功耗模式使能位）同时设置为1，
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* 以关闭时钟振荡器并使所有UART串口进入休眠状态。
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*/
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void ch438_close_all_uart(void)
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{
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ch438_write_reg(offsetadd[CH438_UART0] | REG_IER_ADDR, BIT_IER_LOWPOWER | BIT_IER_SLP, 1); // 数据手册描述：SLP和LOWPOWER同时为1，关闭时钟振荡器，所有串口进入休眠
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}
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/**
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* @brief 初始化UART通信
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*
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* 该函数用于初始化指定的UART端口，并设置其波特率。
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*
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* @param uart_num UART端口号
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* @param baudrate 波特率
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*/
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void ch438_init_uart(uint8_t uart_num, uint32_t baudrate)
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{
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ch438_tranconfig(uart_num);
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ch438_set_baudrate(uart_num, baudrate);
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}
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/**
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* @brief 检查并返回中断标识寄存器（IIR）的值
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*
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* 该函数通过UART编号读取并返回中断标识寄存器（IIR）的值。
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*
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* @param uart_num UART编号，用于指定要读取的UART接口
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*
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* @return 返回中断标识寄存器（IIR）的值
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*/
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uint8_t ch438_check_iir_reg(uint8_t uart_num)
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{
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return ch438_read_reg(offsetadd[uart_num] | REG_IIR_ADDR, 1);
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}
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/**
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* @brief 初始化CH438的配置
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*
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* 该函数用于初始化CH438芯片的配置，包括中断使能寄存器和调制解调器控制寄存器的设置。
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*
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* @param uart_num UART编号，用于指定要初始化的UART通道
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*/
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void ch438_init_config(uint8_t uart_num)
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{
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/* CH438打开BIT_IER_IETHRE会产生一个发送空中断 */
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ch438_write_reg(offsetadd[uart_num] | REG_IER_ADDR, BIT_IER_IELINES | BIT_IER_IETHRE | BIT_IER_IERECV, 1);
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ch438_check_iir_reg(uart_num);
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ch438_write_reg(offsetadd[uart_num] | REG_MCR_ADDR, BIT_MCR_OUT2, 1);
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}
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void ch438_send_data(uint8_t uart_num, uint8_t *data, uint16_t len)
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{
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HART1_RTS_SEND;
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for (uint8_t i = 0; i < len; i++)
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{
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ch438_write_reg(offsetadd[uart_num] | REG_THR_ADDR, data[i], 1);
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}
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}
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uint8_t ch438_recv_data(uint8_t uart_num, uint8_t *data)
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{
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uint8_t data_len = 0;
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uint8_t *receive_data;
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receive_data = data;
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uint16_t time_out = 1000;
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// 等待数据准备好
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while ((ch438_read_reg(offsetadd[uart_num] | REG_LSR_ADDR, 1) & BIT_LSR_DATARDY) == 0)
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{
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time_out--;
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if (time_out == 0)
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{
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break;
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}
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}
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while ((ch438_read_reg(offsetadd[uart_num] | REG_LSR_ADDR, 1) & BIT_LSR_DATARDY))
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{
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*receive_data = ch438_read_reg(offsetadd[uart_num] | REG_RBR_ADDR, 1);
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receive_data++;
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data_len++;
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if (data_len == 112)
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{
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break;
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}
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}
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return data_len;
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}
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void ch438_interrupt_handler(void)
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{
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uint8_t gInterruptStatus; /* 全局中断状态 */
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uint8_t InterruptStatus; /* 独立串口中断状态 */
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uint8_t i;
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gInterruptStatus = ch438_read_reg(REG_SSR_ADDR, 1);
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if (!gInterruptStatus)
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{
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return;
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}
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for (i = 0; i < 8; i++)
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{
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if (gInterruptStatus & Interruptnum[i]) /* 检测哪个串口发生中断 */
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{
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InterruptStatus = ch438_read_reg(offsetadd[i] | REG_IIR_ADDR, 1) & 0x0f; /* 读串口的中断状态 */
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switch (InterruptStatus)
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{
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case INT_NOINT: /* 没有中断 */
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break;
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case INT_THR_EMPTY: /* THR空中断 */
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HART1_RTS_RECEIVE;
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break;
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case INT_RCV_OVERTIME: /* 接收超时中断 */
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receive_data_len = ch438_recv_data(i, receive_data_buff);
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ch438_send_data(i, receive_data_buff, receive_data_len);
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break;
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case INT_RCV_SUCCESS: /* 接收数据可用中断 */
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receive_data_len = ch438_recv_data(i, receive_data_buff);
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ch438_send_data(i, receive_data_buff, receive_data_len);
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break;
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case INT_RCV_LINES: /* 接收线路状态中断 */
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ch438_read_reg(offsetadd[i] | REG_LSR_ADDR, 1);
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break;
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case INT_MODEM_CHANGE: /* MODEM输入变化中断 */
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ch438_read_reg(offsetadd[i] | REG_MSR_ADDR, 1);
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break;
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default:
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break;
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}
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}
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}
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}
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void ch438_init(void)
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{
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ch438_reset_all_uart();
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HAL_Delay(250);
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ch438_init_uart(CH438_UART0, 1200);
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ch438_init_config(CH438_UART0);
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}
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