75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
#include "Kernel\Sys.h"
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#include "Kernel\Task.h"
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#include "Kernel\Interrupt.h"
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#include "Device\SerialPort.h"
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#include "Platform\stm32.h"
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#define COM_DEBUG 0
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// 打开串口
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void SerialPort_Opening(SerialPort& sp)
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{
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auto& tx = sp.Ports[0];
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auto& rx = sp.Ports[1];
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// 串口引脚初始化
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if(!tx) tx = new AlternatePort(sp.Pins[0]);
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if(!rx)
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{
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auto port = new InputPort();
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port->Init(sp.Pins[1], false).Open();
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rx = port;
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}
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tx->Open();
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rx->Open();
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auto idx = sp.Index;
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// 检查重映射
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if(sp.Remap)
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{
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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switch (idx) {
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case 0: AFIO->MAPR |= AFIO_MAPR_USART1_REMAP; break;
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case 1: AFIO->MAPR |= AFIO_MAPR_USART2_REMAP; break;
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case 2: AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
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}
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}
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// 打开 UART 时钟。必须先打开串口时钟，才配置引脚
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if (idx) { // COM2-5 on APB1
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RCC->APB1ENR |= RCC_APB1ENR_USART2EN >> 1 << idx;
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} else { // COM1 on APB2
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RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
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}
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}
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// 关闭端口
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void SerialPort_Closeing(SerialPort& sp)
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{
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// 检查重映射
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if(sp.Remap)
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{
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switch (sp.Index) {
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case 0: AFIO->MAPR &= ~AFIO_MAPR_USART1_REMAP; break;
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case 1: AFIO->MAPR &= ~AFIO_MAPR_USART2_REMAP; break;
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case 2: AFIO->MAPR &= ~AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
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}
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}
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}
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// 获取引脚
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void SerialPort_GetPins(byte index, byte remap, Pin* txPin, Pin* rxPin)
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{
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*rxPin = *txPin = P0;
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const Pin g_Uart_Pins[] = UART_PINS;
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const Pin* p = g_Uart_Pins;
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const Pin g_Uart_Pins_Map[] = UART_PINS_FULLREMAP;
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if(remap) p = g_Uart_Pins_Map;
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int n = index << 2;
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*txPin = p[n];
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*rxPin = p[n + 1];
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}
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