?? main.lst
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ARM COMPILER V2.00f, main 20/02/05 11:46:10 PAGE 1
ARM COMPILER V2.00f, COMPILATION OF MODULE main
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: C:\Keil\ARM\BIN\CA.exe main.c THUMB OPTIMIZE(7,SPEED) BROWSE DEBUG TABS(4)
stmt level source
1 /************************************************************/
2 /* PROJECT NAME: PWM */
3 /* Project: LPC2100 Training course */
4 /* Engineer: T Martin */
5 /* Filename: main.c */
6 /* Language: C */
7 /* Compiler: Keil Carm 2.00b */
8 /* Assembler: */
9 /* */
10 /************************************************************/
11 /* Modification History: */
12 /* */
13 /************************************************************/
14 /* Function: */
15 /* */
16 /* Example PWM module program for LPC2100 */
17 /* */
18 /* Demonstrates dual edge PWM generation */
19 /* */
20 /* Oscillator frequency 12.000 Mhz */
21 /* Target board Keil MCB2100 */
22 /************************************************************/
23
24 #include <LPC21XX.H>
25
26
27
28
29
30 int main(void)
31 {
32 1 unsigned int val,delay;
33 1
34 1 PINSEL0 |= 0x00028000; //Enable pin 0.7 as PWM2
35 1 PWMPR = 0x00000001; //Load prescaler
36 1
37 1 PWMPCR = 0x0000404; //PWM channel 2 double edge control, output enabled
38 1 PWMMCR = 0x00000003; //On match with timer reset the counter
39 1 PWMMR0 = 0x000000FF; //set cycle rate to sixteen ticks
40 1 PWMMR1 = 0x00000080; //set rising edge of PWM2 to 2 ticks
41 1 PWMMR2 = 0x00000080; //set falling edge of PWM2 to 8 ticks
42 1 PWMLER = 0x00000007; //enable shadow latch for match 0 - 2
43 1 PWMEMR = 0x00000280; //Match 1 and Match 2 outputs set high
44 1 PWMTCR = 0x00000002; //Reset counter and prescaler
45 1 PWMTCR = 0x00000009; //enable counter and PWM, release counter from reset
46 1
47 1 ADCR = 0x00250601; // Setup A/D: 10-bit AIN0 @ 3MHz
48 1 ADCR |= 0x01000000; // Start A/D Conversion
49 1
50 1 while(1) // main loop
51 1 {
52 2 for (delay=0;delay < 0x100;delay++)
53 2 {
54 3 ;
55 3 }
56 2 do
57 2 {
58 3 val = ADDR; // Read A/D Data Register
59 3 }
ARM COMPILER V2.00f, main 20/02/05 11:46:10 PAGE 2
60 2 while ((val & 0x80000000) == 0); //Wait for the conversion to complete
61 2 val = ((val >> 8) & 0x00FF); //Extract the A/D result
62 2
63 2 PWMMR1 = 0x00000000+val; //Modulate PWM
64 2 PWMMR2 = 0x000000FF-val;
65 2 PWMLER = 0x00000006; //set latch to update PWM registers next cycle
66 2 }
67 1
68 1
69 1 }
70
71
72
ARM COMPILER V2.00f, main 20/02/05 11:46:10 PAGE 3
ASSEMBLY LISTING OF GENERATED OBJECT CODE
*** EXTERNALS:
EXTERN NUMBER (__startup)
*** PUBLICS:
PUBLIC main
*** CODE SEGMENT '?PR?main?main':
30: int main(void)
00000000 B500 PUSH {LR}
31: {
00000002 ; SCOPE-START
34: PINSEL0 |= 0x00028000; //Enable pin 0.7 as PWM2
00000002 4800 LDR R2,=0x28000
00000004 4800 LDR R0,=0xE002C000
00000006 6801 LDR R1,[R0,#0x0]
00000008 4311 ORR R1,R2
0000000A 6001 STR R1,[R0,#0x0]
35: PWMPR = 0x00000001; //Load prescaler
0000000C 2101 MOV R1,#0x1
0000000E 4800 LDR R0,=0xE001400C
00000010 6001 STR R1,[R0,#0x0]
37: PWMPCR = 0x0000404; //PWM channel 2 double edge control, output enabled
00000012 4800 LDR R1,=0x404
00000014 4800 LDR R0,=0xE001404C
00000016 6001 STR R1,[R0,#0x0]
38: PWMMCR = 0x00000003; //On match with timer reset the counter
00000018 2103 MOV R1,#0x3
0000001A 4800 LDR R0,=0xE0014014
0000001C 6001 STR R1,[R0,#0x0]
39: PWMMR0 = 0x000000FF; //set cycle rate to sixteen ticks
0000001E 21FF MOV R1,#0xFF
00000020 4800 LDR R0,=0xE0014018
00000022 6001 STR R1,[R0,#0x0]
40: PWMMR1 = 0x00000080; //set rising edge of PWM2 to 2 ticks
00000024 2180 MOV R1,#0x80
00000026 4800 LDR R0,=0xE001401C
00000028 6001 STR R1,[R0,#0x0]
41: PWMMR2 = 0x00000080; //set falling edge of PWM2 to 8 ticks
0000002A 2180 MOV R1,#0x80
0000002C 4800 LDR R0,=0xE0014020
0000002E 6001 STR R1,[R0,#0x0]
42: PWMLER = 0x00000007; //enable shadow latch for match 0 - 2
00000030 2107 MOV R1,#0x7
00000032 4800 LDR R0,=0xE0014050
00000034 6001 STR R1,[R0,#0x0]
43: PWMEMR = 0x00000280; //Match 1 and Match 2 outputs set high
00000036 49A0 LDR R1,=0x280
00000038 4800 LDR R0,=0xE001403C
0000003A 6001 STR R1,[R0,#0x0]
44: PWMTCR = 0x00000002; //Reset counter and prescaler
0000003C 2102 MOV R1,#0x2
0000003E 4800 LDR R0,=0xE0014004
00000040 6001 STR R1,[R0,#0x0]
45: PWMTCR = 0x00000009; //enable counter and PWM, release counter from reset
00000042 2109 MOV R1,#0x9
00000044 4800 LDR R0,=0xE0014004
00000046 6001 STR R1,[R0,#0x0]
47: ADCR = 0x00250601; // Setup A/D: 10-bit AIN0 @ 3MHz
00000048 4800 LDR R1,=0x250601
0000004A 4800 LDR R0,=0xE0034000
0000004C 6001 STR R1,[R0,#0x0]
48: ADCR |= 0x01000000; // Start A/D Conversion
0000004E 4800 LDR R2,=0x1000000
ARM COMPILER V2.00f, main 20/02/05 11:46:10 PAGE 4
00000050 4800 LDR R0,=0xE0034000
00000052 6801 LDR R1,[R0,#0x0]
00000054 4311 ORR R1,R2
00000056 6001 STR R1,[R0,#0x0]
52: for (delay=0;delay < 0x100;delay++)
00000058 L_9:
00000058 2000 MOV R0,#0x0
0000005A ---- Variable 'delay' assigned to Register 'R0' ----
55: }
0000005A L_5:
0000005A 3001 ADD R0,#0x1
0000005C 4940 LDR R1,=0x100
0000005E 4288 CMP R0,R1 ; delay
00000060 D3FB BCC L_5 ; T=0x0000005A
56: do
00000062 L_10:
58: val = ADDR; // Read A/D Data Register
00000062 4800 LDR R0,=0xE0034004
00000064 6800 LDR R0,[R0,#0x0]
00000066 ---- Variable 'val' assigned to Register 'R0' ----
59: }
00000066 4800 LDR R1,=0x80000000
00000068 4208 TST R0,R1 ; val
0000006A D0FA BEQ L_10 ; T=0x00000062
61: val = ((val >> 8) & 0x00FF); //Extract the A/D result
0000006C 0A00 LSR R0,R0,#0x8 ; val
0000006E 21FF MOV R1,#0xFF
00000070 4008 AND R0,R1
63: PWMMR1 = 0x00000000+val; //Modulate PWM
00000072 1C02 MOV R2,R0 ; val
00000074 4800 LDR R1,=0xE001401C
00000076 600A STR R2,[R1,#0x0]
64: PWMMR2 = 0x000000FF-val;
00000078 21FF MOV R1,#0xFF
0000007A 1A09 SUB R1,R0 ; val
0000007C 4800 LDR R0,=0xE0014020
0000007E 6001 STR R1,[R0,#0x0]
65: PWMLER = 0x00000006; //set latch to update PWM registers next cycle
00000080 2106 MOV R1,#0x6
00000082 4800 LDR R0,=0xE0014050
00000084 6001 STR R1,[R0,#0x0]
66: }
00000086 E7E7 B L_9 ; T=0x00000058
00000088 ; SCOPE-END
00000088 BC08 POP {R3}
0000008A 4718 BX R3
0000008C ENDP ; 'main'
Module Information Static
----------------------------------
code size = ------
data size = ------
const size = ------
End of Module Information.
ARM COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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