Initial commit

external/CMSIS_5/CMSIS/DoxyGen/Driver/src/USART_Demo.c

@@ -0,0 +1,87 @@
+#include "Driver_USART.h"
+#include "cmsis_os.h"                   /* ARM::CMSIS:RTOS:Keil RTX */
+#include <stdio.h>
+#include <string.h>
+ 
+void myUART_Thread(void const *argument);
+osThreadId tid_myUART_Thread;
+ 
+/* USART Driver */
+extern ARM_DRIVER_USART Driver_USART3;
+ 
+ 
+void myUSART_callback(uint32_t event)
+{
+  uint32_t mask;
+
+  mask = ARM_USART_EVENT_RECEIVE_COMPLETE  |
+         ARM_USART_EVENT_TRANSFER_COMPLETE |
+         ARM_USART_EVENT_SEND_COMPLETE     |
+         ARM_USART_EVENT_TX_COMPLETE       ;
+
+  if (event & mask) {
+    /* Success: Wakeup Thread */
+    osSignalSet(tid_myUART_Thread, 0x01);
+  }
+
+  if (event & ARM_USART_EVENT_RX_TIMEOUT) {
+    __breakpoint(0);  /* Error: Call debugger or replace with custom error handling */
+  }
+
+  if (event & (ARM_USART_EVENT_RX_OVERFLOW | ARM_USART_EVENT_TX_UNDERFLOW)) {
+    __breakpoint(0);  /* Error: Call debugger or replace with custom error handling */
+  }
+}
+
+ 
+/* CMSIS-RTOS Thread - UART command thread */
+void myUART_Thread(const void* args)
+{
+    static ARM_DRIVER_USART * USARTdrv = &Driver_USART3;
+    ARM_DRIVER_VERSION     version;
+    ARM_USART_CAPABILITIES drv_capabilities;
+    char                   cmd;
+ 
+  #ifdef DEBUG
+    version = USARTdrv->GetVersion();
+    if (version.api < 0x200)   /* requires at minimum API version 2.00 or higher */
+    {                          /* error handling */
+        return;
+    }
+    drv_capabilities = USARTdrv->GetCapabilities();
+    if (drv_capabilities.event_tx_complete == 0)
+    {                          /* error handling */
+        return;
+    }
+  #endif
+ 
+    /*Initialize the USART driver */
+    USARTdrv->Initialize(myUSART_callback);
+    /*Power up the USART peripheral */
+    USARTdrv->PowerControl(ARM_POWER_FULL);
+    /*Configure the USART to 4800 Bits/sec */
+    USARTdrv->Control(ARM_USART_MODE_ASYNCHRONOUS |
+                      ARM_USART_DATA_BITS_8 |
+                      ARM_USART_PARITY_NONE |
+                      ARM_USART_STOP_BITS_1 |
+                      ARM_USART_FLOW_CONTROL_NONE, 4800);
+     
+    /* Enable Receiver and Transmitter lines */
+    USARTdrv->Control (ARM_USART_CONTROL_TX, 1);
+    USARTdrv->Control (ARM_USART_CONTROL_RX, 1);
+ 
+    USARTdrv->Send("\nPress Enter to receive a message", 34);
+    osSignalWait(0x01, osWaitForever);
+     
+    while (1)
+    {
+        USARTdrv->Receive(&cmd, 1);          /* Get byte from UART */
+        osSignalWait(0x01, osWaitForever);
+        if (cmd == 13)                       /* CR, send greeting  */
+        {
+          USARTdrv->Send("\nHello World!", 12);
+          osSignalWait(0x01, osWaitForever);
+        }
+ 
+    }
+}