Revision 0:797cb3866420, committed 2018-06-29

Comitter:

trevieze

Date:

Fri Jun 29 13:30:19 2018 +0000

Commit message:

STM32F411RE HAL ADC WORKING EXAMPLE.

Changed in this revision

diff -r 000000000000 -r 797cb3866420 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jun 29 13:30:19 2018 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+#include "string"
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "PeripheralPins.h"
+
+ 
+Serial pc(USBTX, USBRX);  
+
+uint32_t g_ADCValue;
+float g_ADC_Value_Volts;
+const float maxAdcBits = 4095.0f; // Using Float for clarity
+const float maxVolts = 3.3f;      // Using Float for clarity
+const float voltsPerBit = (maxVolts / maxAdcBits);
+
+int main()
+{
+    //Start of initializing analog input on pin PC_1
+    ADC_HandleTypeDef AdcHandle;
+    GPIO_InitTypeDef gpioInit;
+    //Start GPIO and ADC1 Clocks
+    __GPIOC_CLK_ENABLE();
+    __ADC1_CLK_ENABLE();
+    //Define PC_1 which is Pin one of group C and connected to a 10K potentiometer.
+    gpioInit.Pin = GPIO_PIN_1;
+    gpioInit.Mode = GPIO_MODE_ANALOG;
+    gpioInit.Pull = GPIO_NOPULL;
+    HAL_GPIO_Init(GPIOC, &gpioInit);
+    
+    // Configure ADC
+    AdcHandle.Instance = ADC1;
+    AdcHandle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV2;
+    AdcHandle.Init.Resolution            = ADC_RESOLUTION12b;
+    AdcHandle.Init.ScanConvMode          = DISABLE;
+    AdcHandle.Init.ContinuousConvMode    = ENABLE;
+    AdcHandle.Init.DiscontinuousConvMode = DISABLE;
+    AdcHandle.Init.NbrOfDiscConversion   = 0;
+    AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
+    AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;
+    AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
+    AdcHandle.Init.NbrOfConversion       = 1;
+    AdcHandle.Init.DMAContinuousRequests = DISABLE;
+    AdcHandle.Init.EOCSelection          = DISABLE;
+
+    if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
+        pc.printf("Cannot initialize ADC\n");
+        while(1){
+            }
+    }
+    ADC_ChannelConfTypeDef sConfig = {0};
+    // Configure ADC channel
+    sConfig.Rank         = 1;
+    sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
+    sConfig.Offset       = 0;
+    sConfig.Channel = ADC_CHANNEL_11;
+    
+    if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK) {
+        pc.printf("Cannot config channel\r\n");
+        while(1){
+            }
+    }
+    HAL_ADC_ConfigChannel(&AdcHandle, &sConfig); //Not sure why, but I have to do this twice?
+    pc.printf("AnalogIn example\r\n");
+    HAL_ADC_Start(&AdcHandle); // Start conversion
+    while(1) {
+         g_ADCValue = 0;
+         if (HAL_ADC_PollForConversion(&AdcHandle, 1000000) == HAL_OK) {
+            g_ADCValue = HAL_ADC_GetValue(&AdcHandle);
+            g_ADC_Value_Volts = g_ADCValue*voltsPerBit;
+            pc.printf("Conversion ready \r\n");
+            printf("measure = %f V \r\n", g_ADC_Value_Volts);
+         } else {
+            pc.printf("Conversion not ready \r\n");
+        }
+        wait(1.0); // 1 second
+    }
+}
+
+
+
+
+
+
+

diff -r 000000000000 -r 797cb3866420 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Jun 29 13:30:19 2018 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/a7c7b631e539
\ No newline at end of file