sato takumi
/
Prelude_EPS_temp
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Dependencies: mbed mcp3208 HeptaTemp
Revision 0:709d290281a1, committed 2022-06-14
- Comitter:
- goro56
- Date:
- Tue Jun 14 09:22:13 2022 +0000
- Commit message:
- a
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HeptaTemp.lib Tue Jun 14 09:22:13 2022 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/HEPTA/code/HeptaTemp/#845cda80eaf0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jun 14 09:22:13 2022 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+SPI spi(p11,p12,p13);
+DigitalOut cs(p14);
+Serial pc(USBTX, USBRX);
+int main(void)
+{
+ int bit = 8;
+ spi.format(bit,0);
+ spi.frequency(2000000); //VDD=5Vの場合は2MHz．
+ printf("\r\n");
+ printf("Starting MCP3208\r\n");
+ float Vref = 5.08;
+ while(1)
+ {
+ cs = 0;
+ uint8_t d0 = spi.write(0x06);
+ uint8_t d1 = spi.write(0x40);
+ uint8_t d2 = spi.write(0x00);
+ printf("%d,%d,%d \r\n",d0,d1,d2);
+ uint8_t d3 = d1 << 4;
+ uint16_t d = (d3 << 4) | d2; // 1文にまとめると uint16_t d = (d1 << 8) | d2;
+ //float volt = Vref * (float)d / 4096;
+ //float amp = Vref * (float)d / 4096;
+ //printf("d=%d volt=%5.2f\n\r", d, volt);
+ //printf("d=%d CDH_Amp =%f [A]\n\r", d, amp);
+
+ //tem
+
+ float R3;
+ float R4;
+ float R5;
+ float Pt;
+ float R_1;
+ float R_2;
+ //current
+ float I;
+ //voltage
+ float Vreft;
+
+//temperature coefficient
+ float ce;
+ //resistance
+ R3 = 110;//[Ω]
+ R4 = 1000;//[Ω]
+ R5 = 68000;//[Ω]
+ Pt = 100;//[Ω]
+ R_1 = 3;//[kΩ]
+ R_2 = 2;//[kΩ]
+
+ //current
+ I = 0.001;//[A]
+
+ //voltage
+ Vreft = 2.5;//[V]
+
+ //Gain&Offset
+ float gain = -R5*I/R4;
+ float off = Vreft+I*R3;
+
+ //temperature coefficient
+ ce = 0.003851;
+
+ float volt = Vref*(float)d / 4096*(R_1 + R_2)/R_1;
+ float Rth = (volt-off)/gain+R3;
+ float temp = (Rth-Pt)/(ce*Pt);
+ printf("d=%d EPS_Temp =%f [℃]\n\r", d, temp);
+
+ cs = 1;
+ wait(1.0);
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jun 14 09:22:13 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 Jun 14 09:22:13 2022 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/Kemp/code/mcp3208/#e7de500b1f2d