88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
#include "Driver_USART.h"
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#include "cmsis_os.h" /* ARM::CMSIS:RTOS:Keil RTX */
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#include <stdio.h>
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#include <string.h>
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void myUART_Thread(void const *argument);
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osThreadId tid_myUART_Thread;
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/* USART Driver */
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extern ARM_DRIVER_USART Driver_USART3;
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void myUSART_callback(uint32_t event)
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{
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uint32_t mask;
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mask = ARM_USART_EVENT_RECEIVE_COMPLETE |
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ARM_USART_EVENT_TRANSFER_COMPLETE |
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ARM_USART_EVENT_SEND_COMPLETE |
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ARM_USART_EVENT_TX_COMPLETE ;
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if (event & mask) {
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/* Success: Wakeup Thread */
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osSignalSet(tid_myUART_Thread, 0x01);
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}
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if (event & ARM_USART_EVENT_RX_TIMEOUT) {
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__breakpoint(0); /* Error: Call debugger or replace with custom error handling */
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}
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if (event & (ARM_USART_EVENT_RX_OVERFLOW | ARM_USART_EVENT_TX_UNDERFLOW)) {
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__breakpoint(0); /* Error: Call debugger or replace with custom error handling */
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}
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}
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/* CMSIS-RTOS Thread - UART command thread */
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void myUART_Thread(const void* args)
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{
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static ARM_DRIVER_USART * USARTdrv = &Driver_USART3;
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ARM_DRIVER_VERSION version;
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ARM_USART_CAPABILITIES drv_capabilities;
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char cmd;
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#ifdef DEBUG
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version = USARTdrv->GetVersion();
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if (version.api < 0x200) /* requires at minimum API version 2.00 or higher */
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{ /* error handling */
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return;
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}
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drv_capabilities = USARTdrv->GetCapabilities();
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if (drv_capabilities.event_tx_complete == 0)
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{ /* error handling */
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return;
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}
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#endif
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/*Initialize the USART driver */
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USARTdrv->Initialize(myUSART_callback);
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/*Power up the USART peripheral */
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USARTdrv->PowerControl(ARM_POWER_FULL);
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/*Configure the USART to 4800 Bits/sec */
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USARTdrv->Control(ARM_USART_MODE_ASYNCHRONOUS |
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ARM_USART_DATA_BITS_8 |
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ARM_USART_PARITY_NONE |
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ARM_USART_STOP_BITS_1 |
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ARM_USART_FLOW_CONTROL_NONE, 4800);
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/* Enable Receiver and Transmitter lines */
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USARTdrv->Control (ARM_USART_CONTROL_TX, 1);
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USARTdrv->Control (ARM_USART_CONTROL_RX, 1);
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USARTdrv->Send("\nPress Enter to receive a message", 34);
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osSignalWait(0x01, osWaitForever);
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while (1)
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{
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USARTdrv->Receive(&cmd, 1); /* Get byte from UART */
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osSignalWait(0x01, osWaitForever);
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if (cmd == 13) /* CR, send greeting */
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{
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USARTdrv->Send("\nHello World!", 12);
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osSignalWait(0x01, osWaitForever);
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}
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}
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}
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