sato takumi
a
Revision 0:45bcb54bf7f8, committed 24 months ago
- Comitter:
- goro56
- Date:
- Tue Nov 01 05:06:47 2022 +0000
- Commit message:
- a
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Nov 01 05:06:47 2022 +0000
@@ -0,0 +1,118 @@
+//reference
+//https://docs.google.com/document/d/197dgqlNFhn72JrBeSYGtR4Y7DJQRUKC61oHVD9dvLNY/edit
+#include "mbed.h"
+SPI ADC(p11,p12,p13);
+DigitalOut cs[2] = {p14, p26};
+Serial pc(USBTX, USBRX, 9600);
+#define START_BIT 0x04
+#define MODE_SINGLE 0x02 // Single-ended mode
+#define MODE_DIFF 0x00 // Differential mode
+uint16_t MCP3208_get(int channel, int adc_num);
+uint16_t HK_data[40];
+int rcmd = 0,cmdflag = 0, hk_num = 0;
+uint16_t d;
+void commandget();
+void initialize();
+// for temp
+float R3 = 110;
+float R4 = 1000;
+float R5 = 68000;
+float Pt = 100;
+float R_1 = 3;
+float R_2 = 2;
+float I = 0.001;
+float Vreft = 2.5;
+float ce = 0.003851;
+float Rth, temp, volt;
+float Rse=0.02;
+float Gain=50;
+
+float gal;
+
+int main(void)
+{
+ int bit = 8;
+ float Vref = 5;
+ ADC.format(bit,0);
+ ADC.frequency(2000000); //VDD=5Vの場合は2MHz．
+ pc.printf("\r\n");
+ pc.printf("Hello, eps. This is MCP3208 test code.\r\n");
+ pc.printf("if you wanna start, press *a*. \r\n");
+ // for temp calucuration
+ float gain = -R5*I/R4;
+ float off = Vreft+I*R3;
+
+
+ while(1){
+ commandget();
+ if(cmdflag == 1){
+ if(rcmd == 'a'){
+ for(int adc_num = 0; adc_num < 2; adc_num++){
+ for(int i = 0; i < 3; i++){
+ HK_data[hk_num] = MCP3208_get(i, adc_num);
+ pc.printf("ADC_num: %d, return = %d\n\r",adc_num, HK_data[hk_num]);
+ hk_num++;
+ }
+ }
+ //3.3V
+ pc.printf("CH[0]: Volt = %.5f[V]\n\r", Vref * (float)HK_data[0] / 4096);
+ //Temperature
+ volt = Vref*(float)HK_data[1] / 4096*(R_1 + R_2)/R_1;
+ Rth = (volt-off)/gain+R3;
+ temp = (Rth-Pt)/(ce*Pt);
+ pc.printf("CH[1]: Temp = %.5f[degree]\n\r", temp);
+ //Galvanometer
+ gal = Vref * (float)HK_data[2] / 4096/Gain/Rse;
+ pc.printf("CH[2]: Galvanometer = %.5f[A]\n\r", gal);
+ }
+ }
+ for(int j=0; j<hk_num; j++){
+ pc.printf("HK[%d]: %d\n\r", j, HK_data[j]);
+ }
+ initialize();
+ }
+
+ /*
+
+ for(int i = 0; i < 10; i++){
+ uint16_t d = MCP3208_get(1);
+ HK_data[i] = d;
+ pc.printf("return=%d volt=%.5f\n\r", d, Vref * (float)d / 4096);
+ wait(1.0);
+ }
+ pc.printf("Sencing Finish\n\r");
+ pc.printf("Print HK_data\n\r");
+
+ for(int i = 0; i < 10; i++){
+ pc.printf("HK_data[%d] = %d\n\r", i, HK_data[i]);
+ }
+ */
+}
+
+
+uint16_t MCP3208_get(int channel, int adc_num){
+ cs[adc_num] = 0;
+ pc.printf("Channel: %d, ", channel);
+ int command_high = START_BIT | MODE_SINGLE | ((channel & 0x04) >> 2);
+ int command_low = (channel & 0x03) << 6;
+ ADC.write(command_high);
+ int high_byte = ADC.write(command_low) & 0x0F;
+ int low_byte = ADC.write(0x00);
+ int conv_result = (high_byte << 8) | low_byte;
+ cs[adc_num] = 1;
+ return conv_result;
+}
+
+
+void commandget()
+{
+ rcmd = pc.getc();
+ cmdflag = 1;
+ pc.printf("get command: %d,%d\r\n",rcmd,cmdflag);
+}
+void initialize()
+{
+ rcmd = 0;
+ cmdflag = 0;
+ hk_num = 0;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Nov 01 05:06:47 2022 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mcp3208.lib Tue Nov 01 05:06:47 2022 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/Kemp/code/mcp3208/#e7de500b1f2d