Mercurial > ~darius > hgwebdir.cgi > stm32temp

annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/CMSIS/CMSIS debug support.htm @ 30:435c6330896c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Set tv_usec in gettimeofday() by using the prescaler counter.
author Daniel O'Connor <darius@dons.net.au>
date Tue, 27 Nov 2012 13:19:11 +1030
parents c59513fd84fb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
1 <html>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
2
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
3 <head>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
4 <title>CMSIS Debug Support</title>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
5 <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
6 <meta name="GENERATOR" content="Microsoft FrontPage 6.0">
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
7 <meta name="ProgId" content="FrontPage.Editor.Document">
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
8 <style>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
9 <!--
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
10 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
11 Keil Software CHM Style Sheet
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
12 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
13 body { color: #000000; background-color: #FFFFFF; font-size: 75%; font-family:
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
14 Verdana, Arial, 'Sans Serif' }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
15 a:link { color: #0000FF; text-decoration: underline }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
16 a:visited { color: #0000FF; text-decoration: underline }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
17 a:active { color: #FF0000; text-decoration: underline }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
18 a:hover { color: #FF0000; text-decoration: underline }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
19 h1 { font-family: Verdana; font-size: 18pt; color: #000080; font-weight: bold;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
20 text-align: Center; margin-right: 3 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
21 h2 { font-family: Verdana; font-size: 14pt; color: #000080; font-weight: bold;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
22 background-color: #CCCCCC; margin-top: 24; margin-bottom: 3;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
23 padding: 6 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
24 h3 { font-family: Verdana; font-size: 10pt; font-weight: bold; background-color:
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
25 #CCCCCC; margin-top: 24; margin-bottom: 3; padding: 6 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
26 pre { font-family: Courier New; font-size: 10pt; background-color: #CCFFCC;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
27 margin-left: 24; margin-right: 24 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
28 ul { list-style-type: square; margin-top: 6pt; margin-bottom: 0 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
29 ol { margin-top: 6pt; margin-bottom: 0 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
30 li { clear: both; margin-bottom: 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
31 table { font-size: 100%; border-width: 0; padding: 0 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
32 th { color: #FFFFFF; background-color: #000080; text-align: left; vertical-align:
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
33 bottom; padding-right: 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
34 tr { text-align: left; vertical-align: top }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
35 td { text-align: left; vertical-align: top; padding-right: 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
36 .ToolT { font-size: 8pt; color: #808080 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
37 .TinyT { font-size: 8pt; text-align: Center }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
38 code { color: #000000; background-color: #E0E0E0; font-family: 'Courier New', Courier;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
39 line-height: 120%; font-style: normal }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
40 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
41 Notes
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
42 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
43 p.note { font-weight: bold; clear: both; margin-bottom: 3pt; padding-top: 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
44 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
45 Expanding/Contracting Divisions
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
46 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
47 #expand { text-decoration: none; margin-bottom: 3pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
48 img.expand { border-style: none; border-width: medium }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
49 div.expand { display: none; margin-left: 9pt; margin-top: 0 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
50 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
51 Where List Tags
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
52 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
53 p.wh { font-weight: bold; clear: both; margin-top: 6pt; margin-bottom: 3pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
54 table.wh { width: 100% }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
55 td.whItem { white-space: nowrap; font-style: italic; padding-right: 6pt; padding-bottom:
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
56 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
57 td.whDesc { padding-bottom: 6pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
58 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
59 Keil Table Tags
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
60 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
61 table.kt { border: 1pt solid #000000 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
62 th.kt { white-space: nowrap; border-bottom: 1pt solid #000000; padding-left: 6pt;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
63 padding-right: 6pt; padding-top: 4pt; padding-bottom: 4pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
64 tr.kt { }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
65 td.kt { color: #000000; background-color: #E0E0E0; border-top: 1pt solid #A0A0A0;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
66 padding-left: 6pt; padding-right: 6pt; padding-top: 2pt;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
67 padding-bottom: 2pt }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
68 /*-----------------------------------------------------------
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
69 -----------------------------------------------------------*/
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
70 -->
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
71
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
72 </style>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
73 </head>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
74
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
75 <body>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
76
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
77 <h1>CMSIS Debug Support</h1>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
78
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
79 <hr>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
80
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
81 <h2>Cortex-M3 ITM Debug Access</h2>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
82 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
83 The Cortex-M3 incorporates the Instrumented Trace Macrocell (ITM) that provides together with
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
84 the Serial Viewer Output trace capabilities for the microcontroller system. The ITM has
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
85 32 communication channels which are able to transmit 32 / 16 / 8 bit values; two ITM
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
86 communication channels are used by CMSIS to output the following information:
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
87 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
88 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
89 <li>ITM Channel 0: used for printf-style output via the debug interface.</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
90 <li>ITM Channel 31: is reserved for RTOS kernel awareness debugging.</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
91 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
92
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
93 <h2>Debug IN / OUT functions</h2>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
94 <p>CMSIS provides following debug functions:</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
95 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
96 <li>ITM_SendChar (uses ITM channel 0)</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
97 <li>ITM_ReceiveChar (uses global variable)</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
98 <li>ITM_CheckChar (uses global variable)</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
99 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
100
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
101 <h3>ITM_SendChar</h3>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
102 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
103 <strong>ITM_SendChar</strong> is used to transmit a character over ITM channel 0 from
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
104 the microcontroller system to the debug system. <br>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
105 Only a 8 bit value is transmitted.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
106 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
107 <pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
108 static __INLINE uint32_t ITM_SendChar (uint32_t ch)
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
109 {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
110 /* check if debugger connected and ITM channel enabled for tracing */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
111 if ((CoreDebug->DEMCR & CoreDebug_DEMCR_TRCENA) &amp;&amp;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
112 (ITM-&gt;TCR & ITM_TCR_ITMENA) &amp;&amp;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
113 (ITM-&gt;TER & (1UL &lt;&lt; 0)) )
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
114 {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
115 while (ITM-&gt;PORT[0].u32 == 0);
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
116 ITM-&gt;PORT[0].u8 = (uint8_t)ch;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
117 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
118 return (ch);
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
119 }</pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
120
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
121 <h3>ITM_ReceiveChar</h3>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
122 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
123 ITM communication channel is only capable for OUT direction. For IN direction
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
124 a globel variable is used. A simple mechansim detects if a character is received.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
125 The project to test need to be build with debug information.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
126 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
127
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
128 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
129 The globale variable <strong>ITM_RxBuffer</strong> is used to transmit a 8 bit value from debug system
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
130 to microcontroller system. <strong>ITM_RxBuffer</strong> is 32 bit wide to enshure a proper handshake.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
131 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
132 <pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
133 extern volatile int ITM_RxBuffer; /* variable to receive characters */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
134 </pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
135 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
136 A dedicated bit pattern is used to determin if <strong>ITM_RxBuffer</strong> is empty
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
137 or contains a valid value.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
138 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
139 <pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
140 #define ITM_RXBUFFER_EMPTY 0x5AA55AA5 /* value identifying ITM_RxBuffer is ready for next character */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
141 </pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
142 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
143 <strong>ITM_ReceiveChar</strong> is used to receive a 8 bit value from the debug system. The function is nonblocking.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
144 It returns the received character or '-1' if no character was available.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
145 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
146 <pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
147 static __INLINE int ITM_ReceiveChar (void) {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
148 int ch = -1; /* no character available */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
149
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
150 if (ITM_RxBuffer != ITM_RXBUFFER_EMPTY) {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
151 ch = ITM_RxBuffer;
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
152 ITM_RxBuffer = ITM_RXBUFFER_EMPTY; /* ready for next character */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
153 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
154
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
155 return (ch);
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
156 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
157 </pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
158
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
159 <h3>ITM_CheckChar</h3>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
160 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
161 <strong>ITM_CheckChar</strong> is used to check if a character is received.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
162 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
163 <pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
164 static __INLINE int ITM_CheckChar (void) {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
165
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
166 if (ITM_RxBuffer == ITM_RXBUFFER_EMPTY) {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
167 return (0); /* no character available */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
168 } else {
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
169 return (1); /* character available */
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
170 }
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
171 }</pre>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
172
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
173
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
174 <h2>ITM Debug Support in uVision</h2>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
175 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
176 uVision uses in a debug session the <strong>Debug (printf) Viewer</strong> window to
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
177 display the debug data.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
178 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
179 <p>Direction microcontroller system -&gt; uVision:</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
180 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
181 <li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
182 Characters received via ITM communication channel 0 are written in a printf style
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
183 to <strong>Debug (printf) Viewer</strong> window.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
184 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
185 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
186
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
187 <p>Direction uVision -&gt; microcontroller system:</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
188 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
189 <li>Check if <strong>ITM_RxBuffer</strong> variable is available (only performed once).</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
190 <li>Read character from <strong>Debug (printf) Viewer</strong> window.</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
191 <li>If <strong>ITM_RxBuffer</strong> empty write character to <strong>ITM_RxBuffer</strong>.</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
192 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
193
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
194 <p class="Note">Note</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
195 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
196 <li><p>Current solution does not use a buffer machanism for trasmitting the characters.</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
197 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
198 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
199
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
200 <h2>RTX Kernel awareness in uVision</h2>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
201 <p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
202 uVision / RTX are using a simple and efficient solution for RTX Kernel awareness.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
203 No format overhead is necessary.<br>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
204 uVsion debugger decodes the RTX events via the 32 / 16 / 8 bit ITM write access
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
205 to ITM communication channel 31.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
206 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
207
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
208 <p>Following RTX events are traced:</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
209 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
210 <li>Task Create / Delete event
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
211 <ol>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
212 <li>32 bit access. Task start address is transmitted</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
213 <li>16 bit access. Task ID and Create/Delete flag are transmitted<br>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
214 High byte holds Create/Delete flag, Low byte holds TASK ID.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
215 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
216 </ol>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
217 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
218 <li>Task switch event
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
219 <ol>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
220 <li>8 bit access. Task ID of current task is transmitted</li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
221 </ol>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
222 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
223 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
224
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
225 <p class="Note">Note</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
226 <ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
227 <li><p>Other RTOS information could be retrieved via memory read access in a polling mode manner.</p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
228 </li>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
229 </ul>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
230
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
231
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
232 <p class="MsoNormal"><span lang="EN-GB">&nbsp;</span></p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
233
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
234 <hr>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
235
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
236 <p class="TinyT">Copyright © KEIL - An ARM Company.<br>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
237 All rights reserved.<br>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
238 Visit our web site at <a href="http://www.keil.com">www.keil.com</a>.
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
239 </p>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
240
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
241 </body>
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
242
c59513fd84fb Initial commit of STM32 test code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
243 </html>