STM32F10X VGA格式 RGB棋盘格发生器

fanjiezz · 2016-12-14T13:53:16+00:00

有图有真相！ ; t0 K7 q' ~& i, H; J3 O0 N$ B3 j) K7 x* P1 i' A J 0 i4 _8 _8 d, G+ E' p% f" z( W+ Y% @ 8 C- e3 L7 b5 b0 T A+ I- f0 i% K! a5 P6 |" b2 s 程序如下： # Y. i3 A2 I: W/ a2 X4 X// VGA Output.ino * x6 X7 L; t6 A' \8 n# @ D#define LED_PIN PC13 6 u O7 a0 k! u' v# b#define VGA_R PA7 8 b$ S3 r1 l5 L4 y! J5 N#define VGA_G PA6$ E! C. ^, ^3 L/ A7 L% g #define VGA_B PA5- Q# `9 L/ ~& s/ i #define VGA_V PA3 : h8 n4 w4 P; A7 r+ D. N#define VGA_H PA4# m0 I1 C6 J3 K& g9 v5 m6 J #define VGA_R_HIGH (GPIOA_BASE)->BSRR = BIT(7)0 y$ }) x5 Q) E" M6 q M; ?) F #define VGA_R_LOW (GPIOA_BASE)->BRR = BIT(7) / G6 E, u3 {! z/ {- |& l#define VGA_G_HIGH (GPIOA_BASE)->BSRR = BIT(6)8 G5 k0 }2 z5 U8 }- w6 l! g #define VGA_G_LOW (GPIOA_BASE)->BRR = BIT(6)/ x3 R! F" i3 m0 U #define VGA_B_HIGH (GPIOA_BASE)->BSRR = BIT(5) o5 G' o& f, X7 y1 w' p# l#define VGA_B_LOW (GPIOA_BASE)->BRR = BIT(5)3 r* A% @5 |* {0 M$ u# N #define VGA_V_HIGH (GPIOA_BASE)->BSRR = BIT(3)* E# G4 o, A) N: N! _9 v6 e" ^ #define VGA_V_LOW (GPIOA_BASE)->BRR = BIT(3)) D( i; d4 }2 A2 _ #define VGA_H_HIGH (GPIOA_BASE)->BSRR = BIT(4) . t5 @# X$ f; |" n& Z, F8 V#define VGA_H_LOW (GPIOA_BASE)->BRR = BIT(4)+ W2 N1 S$ I3 S% U8 q; s #define NOP do { __asm__ __volatile__ ("nop"); } while (0)- ~0 a% v7 p w; S9 L- |, z; C void isr_porch(void);3 T5 f' E! y( @1 H void isr_start(void);5 B8 I# x" s: G5 x) e( q V void isr_stop(void);" p! x: H2 x/ ^# d2 K" N void isr_update(void);7 q; S( K6 s7 j/ H boolean h_active; # k. m9 i y8 Z& }int x, y = 0,z; / Y- ^. _; x# i) Evoid setup() {, x. q; X9 e( |) K: u: F pinMode(LED_PIN, OUTPUT);* L# k% z$ [3 c3 C pinMode(VGA_R, OUTPUT);! E+ `/ _$ l4 c0 \. z/ ] pinMode(VGA_G, OUTPUT); $ t5 @5 L8 M( z; J ? pinMode(VGA_B, OUTPUT); * Q6 i& ?) j7 b5 k9 N" a pinMode(VGA_V, OUTPUT); 0 m( a. f$ N z pinMode(VGA_H, OUTPUT);4 `# p2 {! X# O Timer4.pause(); : n; j9 Q% X# K; |4 E+ o Timer4.setPrescaleFactor(1); // 72M Full speed . ]) x9 n) y% W7 p7 R" { Timer4.setChannel1Mode(TIMER_OUTPUTCOMPARE); 3 j/ a; ^, n5 L* J$ } Timer4.setChannel2Mode(TIMER_OUTPUTCOMPARE);/ x$ x/ T# U! u$ J: r- j1 c Timer4.setChannel3Mode(TIMER_OUTPUTCOMPARE); z2 L: c: I J7 Z- i0 d Timer4.setOverflow(2287); //72M / 2287 = 31.4685KHZ: U8 d' J! P5 u# L Timer4.setCompare1(1);, y) U/ K0 A2 D, \' J Timer4.attachCompare1Interrupt(HV); 2 m) ~% d8 I$ Z4 L3 h/ k: ?3 | Timer4.setCompare2(40);1 J6 {' E4 @; O/ S5 S Timer4.attachCompare2Interrupt(HS);$ X/ E, S9 u( F& ^- _ Timer4.setCompare3(2140);//2100/ C9 ~( ]- Y8 J Timer4.attachCompare3Interrupt(HL);( `$ |, P r3 `1 ^6 s6 _2 w Timer4.setCount(0);8 y; K7 E6 D* d7 V Timer4.resume(); - g1 N3 {0 g6 P: _% X}2 ]( z8 X% R+ O8 w- n* ~ void loop() {: v- H V, I% ]' j$ S0 Y- {; _ //digitalWrite( LED_PIN,0);delay(500); ) ]5 j% v, k+ K //digitalWrite( LED_PIN,1);delay(500); 9 }# J$ w# O. n" k" f} 4 f8 l- Y8 E5 F. dvoid HH(void) { VGA_H_HIGH;}! d) n4 [3 d3 L4 Y- f+ W' N* {* U void HV(void) {. [' h) [) I/ |+ Q7 j y++;9 V3 f; K0 |) d' X w. H9 u3 D* h if( y > 523 ) { y = 0;h_active = 1;return;} ) D7 i6 A+ R: o( C* q if( y > 492 ) { VGA_V_HIGH;return;} 1 t# F' j7 ^7 X if( y > 490 ) { VGA_V_LOW;return;}: G4 m2 z. T$ l4 [7 p if( y > 479 ) { h_active = 0;} ! u3 x0 t8 }6 Q2 u( q3 f* A |* [& B% @/ h } 3 a0 @0 b! ], evoid HS(void) { 8 K) P1 T5 s# Z( \) c VGA_H_HIGH;7 t& p& f( r7 t! l! M' K if ( h_active == 0) { return;} ! Q; |4 I3 B+ S2 I/ M: ?! ~ for ( x = 0; x < 22; x++){ % h1 T4 p3 [+ o3 u3 P' f z=( y / 40 + x) %3; & a6 W# G! g- w if ( z == 0){ VGA_B_LOW;VGA_R_HIGH;NOP;NOP;NOP;NOP;NOP;} 5 G( x4 X. v+ K- n2 O; I- Q1 s if ( z == 1){ VGA_R_LOW;VGA_G_HIGH;} * Q9 L4 k2 b6 g/ u% O1 Z0 A+ i% l- {/ O if ( z == 2){ VGA_G_LOW;VGA_B_HIGH;NOP;NOP;& d7 A$ F3 z( d NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;}! X. w0 C. G$ {* T3 T% y1 r7 q% p NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;4 D Q) q& b" v) t, U2 e NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;1 J; a: k# z2 P3 N. F6 ? NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;- v# b( ?0 v& P4 m/ H* a NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP; 4 ?8 y# u9 D* e+ y1 |- P }' a, m- ^5 b* V6 D5 d. H VGA_R_LOW;VGA_G_LOW;VGA_B_LOW;' ^' D R5 C6 ^% |& ? } * G! U9 E, o# v" l/ Wvoid HL(void) { VGA_H_LOW; }: Y- z& [! a" n+ |2 H0 a8 v" I ' g" O$ @. p# g4 C; J2 x + }9 F/ N( `% C2 F- x: ^芯片为STM32F103C8T6，参考Crude VGA Output程序。640X480的图像不够细腻，还需改进。今抛砖引玉，望高人赐教。 / [2 e6 c _8 }9 Y4 M% j3 J, s& S- ^

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fanjiezz 发布时间：2016-12-14 21:53

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有图有真相！

程序如下：
// VGA Output.ino
#define LED_PIN PC13
#define VGA_R PA7
#define VGA_G PA6
#define VGA_B PA5
#define VGA_V PA3
#define VGA_H PA4
#define VGA_R_HIGH (GPIOA_BASE)->BSRR = BIT(7)
#define VGA_R_LOW  (GPIOA_BASE)->BRR  = BIT(7)
#define VGA_G_HIGH (GPIOA_BASE)->BSRR = BIT(6)
#define VGA_G_LOW  (GPIOA_BASE)->BRR  = BIT(6)
#define VGA_B_HIGH (GPIOA_BASE)->BSRR = BIT(5)
#define VGA_B_LOW  (GPIOA_BASE)->BRR  = BIT(5)
#define VGA_V_HIGH (GPIOA_BASE)->BSRR = BIT(3)
#define VGA_V_LOW  (GPIOA_BASE)->BRR  = BIT(3)
#define VGA_H_HIGH (GPIOA_BASE)->BSRR = BIT(4)
#define VGA_H_LOW  (GPIOA_BASE)->BRR  = BIT(4)
#define NOP do { __asm__ __volatile__ ("nop"); } while (0)
void isr_porch(void);
void isr_start(void);
void isr_stop(void);
void isr_update(void);
boolean h_active;
int x, y = 0,z;
void setup() {
pinMode(LED_PIN, OUTPUT);
pinMode(VGA_R, OUTPUT);
pinMode(VGA_G, OUTPUT);
pinMode(VGA_B, OUTPUT);
pinMode(VGA_V, OUTPUT);
pinMode(VGA_H, OUTPUT);
Timer4.pause();
Timer4.setPrescaleFactor(1);    // 72M Full speed
Timer4.setChannel1Mode(TIMER_OUTPUTCOMPARE);
Timer4.setChannel2Mode(TIMER_OUTPUTCOMPARE);
Timer4.setChannel3Mode(TIMER_OUTPUTCOMPARE);
Timer4.setOverflow(2287); //72M / 2287 = 31.4685KHZ
Timer4.setCompare1(1);
Timer4.attachCompare1Interrupt(HV);
Timer4.setCompare2(40);
Timer4.attachCompare2Interrupt(HS);
Timer4.setCompare3(2140);//2100
Timer4.attachCompare3Interrupt(HL);
Timer4.setCount(0);
Timer4.resume();
}
void loop() {
  //digitalWrite( LED_PIN,0);delay(500);
  //digitalWrite( LED_PIN,1);delay(500);
}
void HH(void) { VGA_H_HIGH;}
void HV(void) {
y++;
if( y > 523 ) { y = 0;h_active = 1;return;}
if( y > 492 ) { VGA_V_HIGH;return;}
if( y > 490 ) { VGA_V_LOW;return;}
if( y > 479 ) { h_active = 0;}
}
void HS(void) {
VGA_H_HIGH;
if ( h_active == 0) { return;}
for ( x = 0; x < 22; x++){
   z=( y / 40 + x) %3;
   if ( z == 0){ VGA_B_LOW;VGA_R_HIGH;NOP;NOP;NOP;NOP;NOP;}
   if ( z == 1){ VGA_R_LOW;VGA_G_HIGH;}
   if ( z == 2){ VGA_G_LOW;VGA_B_HIGH;NOP;NOP;
   NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;}
   NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;
   NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;
   NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;
   NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;NOP;
}
VGA_R_LOW;VGA_G_LOW;VGA_B_LOW;
}
void HL(void) { VGA_H_LOW; }

芯片为STM32F103C8T6，参考Crude VGA Output程序。640X480的图像不够细腻，还需改进。今抛砖引玉，望高人赐教。

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4个回答

fanjiezz 回答时间：2016-12-14 22:42:04

网上对STM32F10X系列的RTC时钟有不少的非议，都觉得此类RTC很不准确。前几天有空用此板做了一下试验，觉得还不错。下面先上程序，请各位不吝赐教。
//Analog Input speed test (STM32F103C8T6 AD RTC.ino)
#include <RTClock.h>
#define LED_PIN PC13
RTClock rt (RTCSEL_HSE); //RTClock rt (RTCSEL_LSE);
int i=0,THH,TMM,TSS;
int sensorPin0 = 0,sensorValue0;//
int sensorPin1 = 1,sensorValue1;
int sensorPin2 = 2,sensorValue2;
long TimeVar;
void blink () {
  digitalWrite(LED_PIN,!digitalRead(LED_PIN));
  //RTC_GetCounter() % 86400;
  TimeVar=rt.getTime();
  if (TimeVar>86399){rtc_set_count(0);}
  THH = TimeVar / 3600;// Compute hours
  TMM = TimeVar / 60;
  while (TMM>59){TMM=TMM-60;}// Compute minutes
  TSS = TimeVar % 60;                         // Compute seconds
  Serial.print(THH);Serial.print(":");
  Serial.print(TMM);Serial.print(":");
  Serial.print(TSS);Serial.print(" ");
  Serial.print(sensorValue0);Serial.print(" ");
  Serial.print(sensorValue1);Serial.print(" ");
  Serial.print(sensorValue2);Serial.print(" ");
  Serial.println(i);
  i=0;
  }
void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  //pinMode(sensorPin0, INPUT_ANALOG);
  //pinMode(sensorPin1, INPUT_ANALOG);
  //pinMode(sensorPin2, INPUT_ANALOG);
  rtc_set_prescaler_load(62500); //rtc_set_prescaler_load(32768);
rtc_set_count(43199);//11:59:59
  rt.attachSecondsInterrupt(blink);
  Serial.println("start");
}
void loop() {
  sensorValue0=analogRead(sensorPin0);
  sensorValue1=analogRead(sensorPin1);
  sensorValue2=analogRead(sensorPin2);
  i=i+1;
}
程序里顺便把AD的读取速度测了。我用的是8M晶振分频方式，也可用32768晶振，即上面标注的LSE方式。原板上的32768晶振有问题，已换掉了。

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