Revision 0:c82cfd2d165f, committed 2018-03-18

Comitter:

kenjiArai

Date:

Sun Mar 18 01:08:39 2018 +0000

Commit message:

check program for MCP3425 16-Bit Analog-to-Digital Converter(1st release)

Changed in this revision

diff -r 000000000000 -r c82cfd2d165f MCP3425.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP3425.lib	Sun Mar 18 01:08:39 2018 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/kenjiArai/code/MCP3425/#29be5dda6cf2

diff -r 000000000000 -r c82cfd2d165f main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Mar 18 01:08:39 2018 +0000
@@ -0,0 +1,148 @@
+/*
+ * Mbed Application program
+ *  check program for MCP3425 16-Bit Analog-to-Digital Converter
+ *      http://www.microchip.com/wwwproducts/en/MCP3425
+ *      http://akizukidenshi.com/catalog/g/gK-08018/
+ *
+ * Copyright (c) 2018 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Modify:     March     17th, 2018
+ *      Revised:    March     18th, 2018
+ */
+
+//  Include --------------------------------------------------------------------
+#include "mbed.h"
+#include "MCP3425.h"
+
+//  Definition -----------------------------------------------------------------
+//#define     EXAMPLE_0
+//#define     EXAMPLE_1
+#define     EXAMPLE_2
+//#define     EXAMPLE_3
+//#define     EXAMPLE_4
+//#define     EXAMPLE_5
+
+//  Object ---------------------------------------------------------------------
+Serial      pc(USBTX, USBRX);       // Communication with Host
+MCP3425     adc(I2C_SDA, I2C_SCL);    //setup max31855 interface
+Timer       t;
+
+//  RAM ------------------------------------------------------------------------
+
+//  ROM / Constant data --------------------------------------------------------
+
+//  Function prototypes --------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//  Control Program
+//------------------------------------------------------------------------------
+#ifdef EXAMPLE_0
+int main() {
+// Default parameter setting
+// Continuous Conversion + 15 SPS (16 bits) + Gain x1
+    while(true){
+        printf("ADC: %6.5f [V]\r\n", adc.read_voltage());
+        wait(0.2f);
+    }
+}
+#endif
+
+#ifdef EXAMPLE_1
+int main()
+{
+    while(true) {
+        pc.printf("ADC= %d\r\n", adc.read_16bit());
+    }
+}
+#endif
+
+#ifdef EXAMPLE_2
+int main()
+{
+    mcp3425_config_t my_config;
+    float dt;
+    uint32_t conv_time;
+
+    my_config.pga_gain = PGA_GAIN_1;
+    //my_config.pga_gain = PGA_GAIN_2;
+    //my_config.pga_gain = PGA_GAIN_4;
+    //my_config.pga_gain = PGA_GAIN_8;
+    //my_config.sample_rate = SAMPLE_RATE_240SPS_12BIT;
+    //my_config.sample_rate = SAMPLE_RATE_60SPS_14BIT;
+    my_config.sample_rate = SAMPLE_RATE_15SPS_16BIT;
+    my_config.conversion_mode = CONV_MODE_CONTINUOUS;
+    adc.set_config(&my_config);
+    adc.set_offset_volt(0.00037f);
+    adc.set_vref_compensation(0.99303f);
+    while(true) {
+        t.reset();
+        t.start();
+        dt = adc.read_voltage();
+        conv_time = t.read_us();
+        pc.printf("ADC= %6.5f [V], Cnv.time= %d [uS]\r\n", dt, conv_time);
+        wait(0.5f);
+    }
+}
+#endif
+
+#ifdef EXAMPLE_3
+int main()
+{
+    adc.frequency(400000U);
+    while(true) {
+        pc.printf("ADC= %d\r\n", adc.read_16bit());
+    }
+}
+#endif
+
+#ifdef EXAMPLE_4
+int main()
+{
+    mcp3425_config_t my_config;
+    uint16_t dt;
+    uint32_t conv_time;
+
+    my_config.pga_gain = PGA_GAIN_1;
+    my_config.sample_rate = SAMPLE_RATE_240SPS_12BIT;
+    //my_config.sample_rate = SAMPLE_RATE_60SPS_14BIT;
+    //my_config.sample_rate = SAMPLE_RATE_15SPS_16BIT;
+    my_config.conversion_mode = CONV_MODE_ONE_SHOT;
+    //my_config.conversion_mode = CONV_MODE_CONTINUOUS;
+    adc.set_config(&my_config);
+    while(true) {
+        t.reset();
+        t.start();
+        dt = adc.read_16bit();
+        conv_time = t.read_us();
+        pc.printf("ADC= %6d, Conv. time= %d [uS]\r\n", dt, conv_time);
+        wait(0.5f);
+    }
+}
+#endif
+
+#ifdef EXAMPLE_5
+int main()
+{
+    mcp3425_config_t my_config;
+    uint16_t dt;
+    uint32_t conv_time;
+
+    //my_config.pga_gain = PGA_GAIN_1;
+    //my_config.pga_gain = PGA_GAIN_2;
+    //my_config.pga_gain = PGA_GAIN_4;
+    my_config.pga_gain = PGA_GAIN_8;
+    my_config.sample_rate = SAMPLE_RATE_15SPS_16BIT;
+    my_config.conversion_mode = CONV_MODE_CONTINUOUS;
+    adc.set_config(&my_config);
+    adc.frequency(400000U);
+    while(true) {
+        t.reset();
+        t.start();
+        dt = adc.read_16bit();
+        conv_time = t.read_us();
+        pc.printf("ADC= %6d, Conv. time= %d [uS]\r\n", dt, conv_time);
+        wait(0.5f);
+    }
+}
+#endif

diff -r 000000000000 -r c82cfd2d165f mbed-os.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Sun Mar 18 01:08:39 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#91e6db1ea251ffcc973001ed90477f42fdca5751