挖尽GD32潜力,做逻辑分析仪,15M采样速率,60k存储深度,体现GD优越性|我爱单片机

离线huaweiwx

数码4段

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只看楼主倒序阅读我要置顶楼主发表于: 2016-03-22

近来坛上红火的GD32,我也受感染,进了几个,赶紧拆了一片,并做了个最小系统(帖子论坛数据库出错,内容没了), arm的板子,跑起来确实很爽;
并移植完成GD32F103RET6 ARDUINO
   GD32F103RET6 120M 和M64 16M运行速度比较测试
  跑 freertos:http://bbs.mydigit.cn/read.php?tid=1589017
  gd32超频到120M运行,不拿点超越stm32的东东,总觉得没有体现gd的优势,
以前我:atmega64 做个逻辑分析仪，最高速率4M，存储深度2048，开源多平台上位软件pc机显示 ,由于M64 ram小,且主频低,采样速率受到限制.如用gd则可以达到15M的速率,便马山动手,开始向gd arm移植.
还是放在arduino中开发,经排错验证,最终的完成的编译界面:

由于gd仅负责采样,其余由上位机完成,所以代码不大仅14k,ram当然用尽了.
上位机运行界面:

(在单位发帖,仅简单用跳线将pa3接了地)
完整的代码:

复制代码

/*
SLLogicLogger - Simple logic analyser for Stellaris Launchpad
SLLogicLogger supports the SUMP protocol over UART. The UART is mapped
through the debug/flash controller on the Stellaris Launchpad to a virtual
com port. It samples signals on PORTB with samplerate 10 Mhz, buffersize
16kByte, sampling starts at any change on PORTB[0..7].
PB0 and PB1 are limited to 3.6 V! All other pins are 5 V tolerant.
The idea for this simple analyser comes from http://jjmz.free.fr/?p=148
Description of the SUMP protocol:
- http://www.sump.org/projects/analyzer/protocol/
- http://dangerousprototypes.com/docs/The_Logic_Sniffer%27s_extended_SUMP_protocol
A multiplatform client which supports the SUMP protocol is OLS:
http://www.lxtreme.nl/ols/
To install device support for OLS, copy ols.profile* file into the
ols/plugins folder.
Copyright (C) 2012 Thomas Fischl <tfischl@gmx.de> http://www.fischl.de
Last update: 2012-12-24
for gd32f103ret6 120M f_cpu samples signals on PORTA(0..7) with samplerate 15 Mhz, buffersize
60kByte. by huaweiwx@sina.com 2016.3.22
*/
#define VERSION "SLLogicLogger v0.1"
//boards
#define LED LED_BUILTIN //LED_BUILTIN: PC13
// buffer size
#define BUFFERSIZE 60*1024
#define MAX_SAMPLERATE 15000000
// input pa reg
#define GPIO_PORT_DATA_R gpioa.regs->IDR
uint8_t pin[8] ={PA0,PA1,PA2,PA3,PA4,PA5,PA6,PA7};
// SUMP command defintions
#define SUMP_RESET 0x00
#define SUMP_ARM 0x01
#define SUMP_QUERY 0x02
#define SUMP_GET_METADATA 0x04
// sampling buffer
char buffer[BUFFERSIZE];
// send 32bit unsigned integer as SUMP metadata
void sump_sendmeta_uint32(char type, unsigned int i) {
Serial1.write(type);
Serial1.write((i >> 24) & 0xff);
Serial1.write((i >> 16) & 0xff);
Serial1.write((i >> 8) & 0xff);
Serial1.write(i & 0xff);
}
// send 8bit unsigned integer as SUMP metadata
void sump_sendmeta_uint8(char type, unsigned char i) {
Serial1.write(type);
Serial1.write(i);
}
// wait for trigger and do sampling
void dosampling() {
// use it as timeout for trigger
unsigned int i = 0xfffffff;
digitalWrite(LED,LOW);
// get current gpio state an wait for change or timeout
char v = GPIO_PORT_DATA_R;
while ((i-- != 0) && (GPIO_PORT_DATA_R == v));
// aquire data
for (i = BUFFERSIZE-1; i != 0; i--) {
buffer[i] = GPIO_PORT_DATA_R;
}
buffer[0] =GPIO_PORT_DATA_R;
// send it over uart
for (i = 0; i < BUFFERSIZE; i++) Serial1.write(buffer[i]);
digitalWrite(LED,HIGH);
}
//init
void setup(){
pinMode(LED, OUTPUT);
for (uint8_t i=0;i<8;i++) pinMode(pin[i],INPUT);
Serial1.begin(115200);
for(uint8_t i=0;i<7;i++){ //ready
digitalToggle(LED);
delay(250);
}
}
// main routine
void loop () {
if (Serial1.available()) {
// get the new byte:
unsigned char cmd = Serial1.read();
switch (cmd) {
case SUMP_RESET:
break;
case SUMP_ARM:
dosampling();
break;
case SUMP_QUERY:
Serial1.print("1ALS");
break;
case SUMP_GET_METADATA:
// device name
Serial1.write(0x01);
Serial1.print(VERSION);
Serial1.write(0x00);
// amount of sample memory available (bytes)
sump_sendmeta_uint32(0x21, BUFFERSIZE);
// maximum sample rate (hz)
sump_sendmeta_uint32(0x23, MAX_SAMPLERATE);
// number of usable probes (short)
sump_sendmeta_uint8(0x40, 0x08);
// protocol version (short)
sump_sendmeta_uint8(0x41, 0x02);
// end of meta data
Serial1.write(0x00);
break;
// long commands.. consume bytes from uart
case 0xC0:
case 0xC4:
case 0xC8:
case 0xCC:
case 0xC1:
case 0xC5:
case 0xC9:
case 0xCD:
case 0xC2:
case 0xC6:
case 0xCA:
case 0xCE:
case 0x80:
case 0x81:
case 0x82:
Serial1.read();
Serial1.read();
Serial1.read();
Serial1.read();
break;
}
}
}