1 #include "Driver_USART.h"
2 #include "cmsis_os.h" /* ARM::CMSIS:RTOS:Keil RTX */
3 #include <stdio.h>
4 #include <string.h>
5
6 void myUART_Thread(void const *argument);
7 osThreadId tid_myUART_Thread;
8
9 /* USART Driver */
10 extern ARM_DRIVER_USART Driver_USART3;
11
12
myUSART_callback(uint32_t event)13 void myUSART_callback(uint32_t event)
14 {
15 uint32_t mask;
16
17 mask = ARM_USART_EVENT_RECEIVE_COMPLETE |
18 ARM_USART_EVENT_TRANSFER_COMPLETE |
19 ARM_USART_EVENT_SEND_COMPLETE |
20 ARM_USART_EVENT_TX_COMPLETE ;
21
22 if (event & mask) {
23 /* Success: Wakeup Thread */
24 osSignalSet(tid_myUART_Thread, 0x01);
25 }
26
27 if (event & ARM_USART_EVENT_RX_TIMEOUT) {
28 __breakpoint(0); /* Error: Call debugger or replace with custom error handling */
29 }
30
31 if (event & (ARM_USART_EVENT_RX_OVERFLOW | ARM_USART_EVENT_TX_UNDERFLOW)) {
32 __breakpoint(0); /* Error: Call debugger or replace with custom error handling */
33 }
34 }
35
36
37 /* CMSIS-RTOS Thread - UART command thread */
myUART_Thread(const void * args)38 void myUART_Thread(const void* args)
39 {
40 static ARM_DRIVER_USART * USARTdrv = &Driver_USART3;
41 ARM_DRIVER_VERSION version;
42 ARM_USART_CAPABILITIES drv_capabilities;
43 char cmd;
44
45 #ifdef DEBUG
46 version = USARTdrv->GetVersion();
47 if (version.api < 0x200) /* requires at minimum API version 2.00 or higher */
48 { /* error handling */
49 return;
50 }
51 drv_capabilities = USARTdrv->GetCapabilities();
52 if (drv_capabilities.event_tx_complete == 0)
53 { /* error handling */
54 return;
55 }
56 #endif
57
58 /*Initialize the USART driver */
59 USARTdrv->Initialize(myUSART_callback);
60 /*Power up the USART peripheral */
61 USARTdrv->PowerControl(ARM_POWER_FULL);
62 /*Configure the USART to 4800 Bits/sec */
63 USARTdrv->Control(ARM_USART_MODE_ASYNCHRONOUS |
64 ARM_USART_DATA_BITS_8 |
65 ARM_USART_PARITY_NONE |
66 ARM_USART_STOP_BITS_1 |
67 ARM_USART_FLOW_CONTROL_NONE, 4800);
68
69 /* Enable Receiver and Transmitter lines */
70 USARTdrv->Control (ARM_USART_CONTROL_TX, 1);
71 USARTdrv->Control (ARM_USART_CONTROL_RX, 1);
72
73 USARTdrv->Send("\nPress Enter to receive a message", 34);
74 osSignalWait(0x01, osWaitForever);
75
76 while (1)
77 {
78 USARTdrv->Receive(&cmd, 1); /* Get byte from UART */
79 osSignalWait(0x01, osWaitForever);
80 if (cmd == 13) /* CR, send greeting */
81 {
82 USARTdrv->Send("\nHello World!", 12);
83 osSignalWait(0x01, osWaitForever);
84 }
85
86 }
87 }
88
